ChangeLog file for zlib
+Changes in 1.2.0 (9 March 2003)
+- New and improved inflate code
+ - About 20% faster
+ - Does not allocate 32K window unless and until needed
+ - Automatically detects and decompresses gzip streams
+ - Raw inflate no longer needs an extra dummy byte at end
+ - Added inflateBack functions using a callback interface--even faster
+ than inflate, useful for file utilities (gzip, zip)
+ - Added inflateCopy() function to record state for random access on
+ externally generated deflate streams (e.g. in gzip files)
+ - More readable code (I hope)
+- New and improved crc32()
+ - About 50% faster, thanks to suggestions from Rodney Brown
+- Add deflateBound() and compressBound() functions
+- Fix memory leak in deflateInit2()
+- Permit setting dictionary for raw deflate (for parallel deflate)
+- Fix const declaration for gzwrite()
+- Check for some malloc() failures in gzio.c
+- Fix bug in gzopen() on single-byte file 0x1f
+- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
+ and next buffer doesn't start with 0x8b
+- Fix uncompress() to return Z_DATA_ERROR on truncated input
+- Free memory at end of example.c
+- Remove MAX #define in trees.c (conflicted with some libraries)
+- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
+- Declare malloc() and free() in gzio.c if STDC not defined
+- Use malloc() instead of calloc() in zutil.c if int big enough
+- Define STDC for AIX
+- Add aix/ with approach for compiling shared library on AIX
+- Add HP-UX support for shared libraries in configure
+- Add OpenUNIX support for shared libraries in configure
+- Use $cc instead of gcc to build shared library
+- Make prefix directory if needed when installing
+- Correct Macintosh avoidance of typedef Byte in zconf.h
+- Correct Turbo C memory allocation when under Linux
+- Use libz.a instead of -lz in Makefile (assure use of compiled library)
+- Update configure to check for snprintf or vsnprintf functions and their
+ return value, warn during make if using an insecure function
+- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
+ is lost when library is used--resolution is to build new zconf.h
+- Documentation improvements (in zlib.h):
+ - Document raw deflate and inflate
+ - Update RFCs URL
+ - Point out that zlib and gzip formats are different
+ - Note that Z_BUF_ERROR is not fatal
+ - Document string limit for gzprintf() and possible buffer overflow
+ - Note requirement on avail_out when flushing
+ - Note permitted values of flush parameter of inflate()
+- Add some FAQs (and even answers) to the FAQ
+- Add contrib/inflate86/ for x86 faster inflate
+- Add contrib/blast/ for PKWare Data Compression Library decompression
+- Add contrib/puff/ simple inflate for deflate format description
Changes in 1.1.4 (11 March 2002)
- ZFREE was repeated on same allocation on some error conditions.
less than 32K.
- force windowBits > 8 to avoid a bug in the encoder for a window size
of 256 bytes. (A complete fix will be available in 1.1.5).
-
+
Changes in 1.1.3 (9 July 1998)
- fix "an inflate input buffer bug that shows up on rare but persistent
occasions" (Mark)
Before making the call, make sure that avail_in and avail_out are not
zero. When setting the parameter flush equal to Z_FINISH, also make sure
that avail_out is big enough to allow processing all pending input.
+ Note that a Z_BUF_ERROR is not fatal--another call to deflate() or
+ inflate() can be made with more input or output space. A Z_BUF_ERROR
+ may in fact be unavoidable depending on how the functions are used, since
+ it is not possible to tell whether or not there is more output pending
+ when strm.avail_out returns with zero.
6. Where's the zlib documentation (man pages, etc.)?
14. Why does "make test" fail on Mac OS X?
Mac OS X already includes zlib as a shared library, and so -lz links the
- shared library instead of the one that the "make" compiled. For zlib
- 1.1.3, the two are incompatible due to different compile-time
- options. Simply change the -lz in the Makefile to libz.a, and it will use
- the compiled library instead of the shared one and the "make test" will
- succeed.
+ shared library instead of the one that the "make" compiled. The two are
+ incompatible due to different compile-time options. Simply change the -lz
+ in the Makefile to libz.a, and it will use the compiled library instead
+ of the shared one and the "make test" will succeed.
15. I have a question about OttoPDF
We are not the authors of OttoPDF. The real author is on the OttoPDF web
site Joel Hainley jhainley@myndkryme.com.
+
+16. Why does gzip give an error on a file I make with compress/deflate?
+
+ The compress and deflate functions produce data in the zlib format, which
+ is different and incompatible with the gzip format. The gz* functions in
+ zlib on the other hand use the gzip format. Both the zlib and gzip
+ formats use the same compressed data format, but have different headers
+ and trailers.
+
+17. Ok, so why are there two different formats?
+
+ The gzip format was designed to retain the directory information about
+ a single file, such as the name and last modification date. The zlib
+ format on the other hand was designed for in-memory and communication
+ channel applications, and has a much more compact header and trailer and
+ uses a faster integrity check than gzip.
+
+18. Well that's nice, but how do I make a gzip file in memory?
+
+ Read RFC 1952 for the gzip header and trailer format, and roll your own
+ gzip formatted data using raw deflate and crc32().
+
+19. Is zlib thread-safe?
+
+ Yes. However any library routines that zlib uses and any application-
+ provided memory allocation routines must also be thread-safe. Of course,
+ you should only operate on any given zlib or gzip stream from a single
+ thread. zlib's gz* functions use stdio library routines, and most of
+ zlib's functions use the library memory allocation routines by default.
+ zlib's Init functions allow for the application to provide custom memory
+ allocation routines.
+
+20. Can I use zlib in my commercial application?
+
+ Yes. Please read the license in zlib.h.
+
+21. Is zlib under the GNU license?
+
+ No. Please read the license in zlib.h.
+
+22. Will zlib work on a big-endian or little-endian architecture, and can I
+ exchange compressed data between them?
+
+ Yes and yes.
+
+23. Will zlib work on a 64-bit machine?
+
+ It should. It has been tested on 64-bit machines, and has no dependence
+ on any data types being limited to 32-bits in length. If you have any
+ difficulties, please provide a complete problem report to zlib@gzip.org
+
+24. Will zlib decompress data from the PKWare Data Compression Library?
+
+ No. The PKWare DCL uses a completely different compressed data format
+ than does PKZIP and zlib. However, you can look in zlib's contrib/blast
+ directory for a possible solution to your problem.
+
+25. Can I access data randomly in a compressed stream?
+
+ No, not without some preparation. If when compressing you periodically
+ use Z_FULL_FLUSH, carefully write all the pending data at those points,
+ and keep an index of those locations, then you can start decompression
+ at those points. You have to be careful to not use Z_FULL_FLUSH too
+ often, since it can significantly degrade compression.
+
+26. Does zlib work on MVS, OS/390, CICS, etc.?
+
+ We don't know for sure. We have heard occasional reports of success on
+ these systems. If you do use it on one of these, please provide us with
+ a report, instructions, and patches that we can reference when we get
+ these questions. Thanks.
+
+27. Is there some simpler, easier to read version of inflate I can look at
+ to understand the deflate format?
+
+ First off, you should read RFC 1951. Second, yes. Look in zlib's
+ contrib/puff directory.
+
+28. Does zlib infringe on any patents?
+
+ As far as we know, no. In fact, that was originally the whole point behind
+ zlib. Look here for some more information:
+
+ http://www.gzip.org/#faq11
+
+29. Can zlib work with greater than 4 GB of data?
+
+ Yes. inflate() and deflate() will process any amount of data correctly.
+ However the strm.total_in and strm_total_out counters may be limited to
+ 4 GB. The user can easily set up their own counters updated after each
+ call of inflate() or deflate() to count beyond 4 GB. compress() and
+ uncompress() may be limited to 4 GB, since they operate in a single
+ call using unsigned long lengths. gzseek() may be limited to 4 GB
+ depending on how zlib is compiled.
+
+30. Does zlib have any security vulnerabilities?
+
+ The only one that we are aware of is potentially in gzprintf(). If zlib
+ is compiled to use sprintf() or vsprintf(), then there is no protection
+ against a buffer overflow of a 4K string space, other than the caller of
+ gzprintf() assuring that the output will not exceed 4K. On the other
+ hand, if zlib is compiled to use snprintf() or vsnprintf(), then there is
+ no vulnerability.
+
+ Note that you should be using the most recent version of zlib. Versions
+ 1.1.3 and before were subject to a double-free vulnerability.
+
+31. Is there a Java version of zlib?
+
+ Probably what you want is to use zlib in Java. zlib is already included
+ as part of the Java SDK in the java.util.zip class. If you really want
+ a version of zlib written in the Java language, look on the zlib home
+ page for links: http://www.zlib.org/
+
+32. I get this or that compiler or source-code scanner warning. Can't you guys
+ write proper code?
+
+ Many years ago, we gave up attempting to avoid warnings on every compiler
+ in the universe. It just got to be a waste of time, and some compilers
+ were downright silly. So now, we simply make sure that the code always
+ works.
+
+33. Will zlib read the (insert any ancient or arcane format here) compressed
+ data format?
+
+ Probably not. Look in the comp.compression FAQ for pointers to various
+ formats and associated software.
+
+34. How can I encrypt/decrypt zip files with zlib?
+
+ zlib doesn't support encryption. PKZIP encryption is very weak and can be
+ broken with freely available programs. To get strong encryption, use gpg
+ which already includes zlib compression.
+
+35. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
+
+ "gzip" is the gzip format, and "deflate" is the zlib format. They should
+ probably have called the second one "zlib" instead to avoid confusion
+ with the raw deflate compressed data format. While the HTTP 1.1 RFC 2616
+ correctly points to the zlib specification in RFC 1950 for the "deflate"
+ transfer encoding, there have been reports of servers and browsers that
+ incorrectly produce or expect raw deflate data per the deflate
+ specficiation in RFC 1951, most notably Microsoft. So even though the
+ "deflate" transfer encoding using the zlib format would be the more
+ efficient approach (and in fact exactly what the zlib format was designed
+ for), using the "gzip" transfer encoding is probably more reliable due to
+ an unfortunate choice of name on the part of the HTTP 1.1 authors.
+
+36. Does zlib support the new "Deflate64" format introduced by PKWare?
+
+ No. PKWare has apparently decided to keep that format proprietary, since
+ they have not documented it as they have previous compression formats.
+ In any case, the compression improvements are so modest compared to other
+ more modern approaches, that it's not worth the effort to implement.
+
+37. Can you please sign these lengthy legal documents and fax them back to us
+ so that we can use your software in our product?
+
+ No.
ChangeLog history of changes
-INDEX this file
FAQ Frequently Asked Questions about zlib
-Make_vms.com script for Vax/VMS
+INDEX this file
Makefile makefile for Unix (generated by configure)
Makefile.in makefile for Unix (template for configure)
-Makefile.riscos makefile for RISCOS
README guess what
algorithm.txt description of the (de)compression algorithm
configure configure script for Unix
-descrip.mms makefile for Vax/VMS
-zlib.3 mini man page for zlib (volunteers to write full
- man pages from zlib.h welcome. write to jloup@gzip.org)
-
-amiga/Makefile.sas makefile for Amiga SAS/C
-amiga/Makefile.pup makefile for Amiga powerUP SAS/C PPC
-
-msdos/Makefile.w32 makefile for Microsoft Visual C++ 32-bit
-msdos/Makefile.b32 makefile for Borland C++ 32-bit
-msdos/Makefile.bor makefile for Borland C/C++ 16-bit
-msdos/Makefile.dj2 makefile for DJGPP 2.x
-msdos/Makefile.emx makefile for EMX 0.9c (32-bit DOS/OS2)
-msdos/Makefile.msc makefile for Microsoft C 16-bit
-msdos/Makefile.tc makefile for Turbo C
-msdos/Makefile.wat makefile for Watcom C
-msdos/zlib.def definition file for Windows DLL
-msdos/zlib.rc definition file for Windows DLL
-
-nt/Makefile.nt makefile for Windows NT
-nt/zlib.dnt definition file for Windows NT DLL
-nt/Makefile.emx makefile for EMX 0.9c/RSXNT 1.41 (Win32 Intel)
-nt/Makefile.gcc makefile for Windows NT using GCC (mingw32)
+zconf.in.h template for zconf.h (used by configure)
+aix/ instructions for building an AIX shared library
+old/ makefiles for various architectures and zlib documentation
+ that has not yet been updated for zlib 1.2.x
zlib public header files (must be kept):
zconf.h
adler32.c
compress.c
crc32.c
+crc32.h
deflate.c
deflate.h
gzio.c
-infblock.c
-infblock.h
-infcodes.c
-infcodes.h
+infback.c
inffast.c
inffast.h
+inffixed.h
inflate.c
+inflate.h
inftrees.c
inftrees.h
-infutil.c
-infutil.h
-maketree.c
trees.c
+trees.h
uncompr.c
zutil.c
zutil.h
minigzip.c
unsupported contribution by third parties
-
-contrib/asm386/ by Gilles Vollant <info@winimage.com>
- 386 asm code replacing longest_match().
-
-contrib/minizip/ by Gilles Vollant <info@winimage.com>
- Mini zip and unzip based on zlib
- See http://www.winimage.com/zLibDll/unzip.html
-
-contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
- A C++ I/O streams interface to the zlib gz* functions
-
-contrib/iostream2/ by Tyge LΓΈvset <Tyge.Lovset@cmr.no>
- Another C++ I/O streams interface
-
-contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
- A very simple tar.gz extractor using zlib
-
-contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
- How to use compress(), uncompress() and the gz* functions from VB.
+See contrib/README.contrib
+++ /dev/null
-$! make libz under VMS
-$! written by Martin P.J. Zinser <m.zinser@gsi.de>
-$!
-$! Look for the compiler used
-$!
-$ ccopt = ""
-$ if f$getsyi("HW_MODEL").ge.1024
-$ then
-$ ccopt = "/prefix=all"+ccopt
-$ comp = "__decc__=1"
-$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
-$ else
-$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
-$ then
-$ comp = "__vaxc__=1"
-$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
-$ else
-$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
-$ ccopt = "/decc/prefix=all"+ccopt
-$ comp = "__decc__=1"
-$ endif
-$ endif
-$!
-$! Build the thing plain or with mms
-$!
-$ write sys$output "Compiling Zlib sources ..."
-$ if f$search("SYS$SYSTEM:MMS.EXE").eqs.""
-$ then
-$ dele example.obj;*,minigzip.obj;*
-$ CALL MAKE adler32.OBJ "CC ''CCOPT' adler32" -
- adler32.c zlib.h zconf.h
-$ CALL MAKE compress.OBJ "CC ''CCOPT' compress" -
- compress.c zlib.h zconf.h
-$ CALL MAKE crc32.OBJ "CC ''CCOPT' crc32" -
- crc32.c zlib.h zconf.h
-$ CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
- deflate.c deflate.h zutil.h zlib.h zconf.h
-$ CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
- gzio.c zutil.h zlib.h zconf.h
-$ CALL MAKE infblock.OBJ "CC ''CCOPT' infblock" -
- infblock.c zutil.h zlib.h zconf.h infblock.h
-$ CALL MAKE infcodes.OBJ "CC ''CCOPT' infcodes" -
- infcodes.c zutil.h zlib.h zconf.h inftrees.h
-$ CALL MAKE inffast.OBJ "CC ''CCOPT' inffast" -
- inffast.c zutil.h zlib.h zconf.h inffast.h
-$ CALL MAKE inflate.OBJ "CC ''CCOPT' inflate" -
- inflate.c zutil.h zlib.h zconf.h infblock.h
-$ CALL MAKE inftrees.OBJ "CC ''CCOPT' inftrees" -
- inftrees.c zutil.h zlib.h zconf.h inftrees.h
-$ CALL MAKE infutil.OBJ "CC ''CCOPT' infutil" -
- infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
-$ CALL MAKE trees.OBJ "CC ''CCOPT' trees" -
- trees.c deflate.h zutil.h zlib.h zconf.h
-$ CALL MAKE uncompr.OBJ "CC ''CCOPT' uncompr" -
- uncompr.c zlib.h zconf.h
-$ CALL MAKE zutil.OBJ "CC ''CCOPT' zutil" -
- zutil.c zutil.h zlib.h zconf.h
-$ write sys$output "Building Zlib ..."
-$ CALL MAKE libz.OLB "lib/crea libz.olb *.obj" *.OBJ
-$ write sys$output "Building example..."
-$ CALL MAKE example.OBJ "CC ''CCOPT' example" -
- example.c zlib.h zconf.h
-$ call make example.exe "LINK example,libz.olb/lib" example.obj libz.olb
-$ write sys$output "Building minigzip..."
-$ CALL MAKE minigzip.OBJ "CC ''CCOPT' minigzip" -
- minigzip.c zlib.h zconf.h
-$ call make minigzip.exe -
- "LINK minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib" -
- minigzip.obj libz.olb
-$ else
-$ mms/macro=('comp')
-$ endif
-$ write sys$output "Zlib build completed"
-$ exit
-$!
-$!
-$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES
-$ V = 'F$Verify(0)
-$! P1 = What we are trying to make
-$! P2 = Command to make it
-$! P3 - P8 What it depends on
-$
-$ If F$Search(P1) .Eqs. "" Then Goto Makeit
-$ Time = F$CvTime(F$File(P1,"RDT"))
-$arg=3
-$Loop:
-$ Argument = P'arg
-$ If Argument .Eqs. "" Then Goto Exit
-$ El=0
-$Loop2:
-$ File = F$Element(El," ",Argument)
-$ If File .Eqs. " " Then Goto Endl
-$ AFile = ""
-$Loop3:
-$ OFile = AFile
-$ AFile = F$Search(File)
-$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
-$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
-$ Goto Loop3
-$NextEL:
-$ El = El + 1
-$ Goto Loop2
-$EndL:
-$ arg=arg+1
-$ If arg .Le. 8 Then Goto Loop
-$ Goto Exit
-$
-$Makeit:
-$ VV=F$VERIFY(0)
-$ write sys$output P2
-$ 'P2
-$ VV='F$Verify(VV)
-$Exit:
-$ If V Then Set Verify
-$ENDSUBROUTINE
# Makefile for zlib
-# Copyright (C) 1995-2002 Jean-loup Gailly.
+# Copyright (C) 1995-2003 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
# -Wstrict-prototypes -Wmissing-prototypes
-LDFLAGS=-L. -lz
+LDFLAGS=libz.a
LDSHARED=$(CC)
CPP=$(CC) -E
-VER=1.1.4
+VER=1.2.0
LIBS=libz.a
SHAREDLIB=libz.so
includedir = ${prefix}/include
OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+ zutil.o inflate.o infback.o inftrees.o inffast.o
OBJA =
# to use the asm code: make OBJA=match.o
TEST_OBJS = example.o minigzip.o
+# Note: this hasn't been updated for zlib 1.2.0
DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
algorithm.txt zlib.3 zlib.html \
msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
install: $(LIBS)
+ -@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-@if [ ! -d $(includedir) ]; then mkdir $(includedir); fi
-@if [ ! -d $(libdir) ]; then mkdir $(libdir); fi
cp zlib.h zconf.h $(includedir)
_match.s maketree
distclean: clean
+ cp -p Makefile.in Makefile
+ cp -p zconf.in.h zconf.h
zip:
mv Makefile Makefile~; cp -p Makefile.in Makefile
mv Makefile~ Makefile
dist:
+ echo Warning: this hasn't been updated for zlib 1.2.0 -- don't use
mv Makefile Makefile~; cp -p Makefile.in Makefile
rm -f test.c ztest*.c contrib/minizip/test.zip
d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
-crc32.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
example.o: zlib.h zconf.h
gzio.o: zutil.h zlib.h zconf.h
-infblock.o: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
-infcodes.o: zutil.h zlib.h zconf.h
-infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h
-inffast.o: infblock.h infcodes.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
minigzip.o: zlib.h zconf.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
# Makefile for zlib
-# Copyright (C) 1995-2002 Jean-loup Gailly.
+# Copyright (C) 1995-2003 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile and test, type:
#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
# -Wstrict-prototypes -Wmissing-prototypes
-LDFLAGS=-L. -lz
+LDFLAGS=libz.a
LDSHARED=$(CC)
CPP=$(CC) -E
-VER=1.1.4
+VER=1.2.0
LIBS=libz.a
SHAREDLIB=libz.so
includedir = ${prefix}/include
OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+ zutil.o inflate.o infback.o inftrees.o inffast.o
OBJA =
# to use the asm code: make OBJA=match.o
TEST_OBJS = example.o minigzip.o
+# Note: this hasn't been updated for zlib 1.2.0
DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
algorithm.txt zlib.3 zlib.html \
msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
install: $(LIBS)
+ -@if [ ! -d $(exec_prefix) ]; then mkdir $(exec_prefix); fi
-@if [ ! -d $(includedir) ]; then mkdir $(includedir); fi
-@if [ ! -d $(libdir) ]; then mkdir $(libdir); fi
cp zlib.h zconf.h $(includedir)
_match.s maketree
distclean: clean
+ cp -p Makefile.in Makefile
+ cp -p zconf.in.h zconf.h
zip:
mv Makefile Makefile~; cp -p Makefile.in Makefile
mv Makefile~ Makefile
dist:
+ echo Warning: this hasn't been updated for zlib 1.2.0 -- don't use
mv Makefile Makefile~; cp -p Makefile.in Makefile
rm -f test.c ztest*.c contrib/minizip/test.zip
d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
-crc32.o: zlib.h zconf.h
+crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
example.o: zlib.h zconf.h
gzio.o: zutil.h zlib.h zconf.h
-infblock.o: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
-infcodes.o: zutil.h zlib.h zconf.h
-infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h
-inffast.o: infblock.h infcodes.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
+infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
minigzip.o: zlib.h zconf.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
+++ /dev/null
-# Project: zlib_1_03
-# Patched for zlib 1.1.2 rw@shadow.org.uk 19980430
-# test works out-of-the-box, installs `somewhere' on demand
-
-# Toolflags:
-CCflags = -c -depend !Depend -IC: -g -throwback -DRISCOS -fah
-C++flags = -c -depend !Depend -IC: -throwback
-Linkflags = -aif -c++ -o $@
-ObjAsmflags = -throwback -NoCache -depend !Depend
-CMHGflags =
-LibFileflags = -c -l -o $@
-Squeezeflags = -o $@
-
-# change the line below to where _you_ want the library installed.
-libdest = lib:zlib
-
-# Final targets:
-@.lib: @.o.adler32 @.o.compress @.o.crc32 @.o.deflate @.o.gzio \
- @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil @.o.trees \
- @.o.uncompr @.o.zutil
- LibFile $(LibFileflags) @.o.adler32 @.o.compress @.o.crc32 @.o.deflate \
- @.o.gzio @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil \
- @.o.trees @.o.uncompr @.o.zutil
-test: @.minigzip @.example @.lib
- @copy @.lib @.libc A~C~DF~L~N~P~Q~RS~TV
- @echo running tests: hang on.
- @/@.minigzip -f -9 libc
- @/@.minigzip -d libc-gz
- @/@.minigzip -f -1 libc
- @/@.minigzip -d libc-gz
- @/@.minigzip -h -9 libc
- @/@.minigzip -d libc-gz
- @/@.minigzip -h -1 libc
- @/@.minigzip -d libc-gz
- @/@.minigzip -9 libc
- @/@.minigzip -d libc-gz
- @/@.minigzip -1 libc
- @/@.minigzip -d libc-gz
- @diff @.lib @.libc
- @echo that should have reported '@.lib and @.libc identical' if you have diff.
- @/@.example @.fred @.fred
- @echo that will have given lots of hello!'s.
-
-@.minigzip: @.o.minigzip @.lib C:o.Stubs
- Link $(Linkflags) @.o.minigzip @.lib C:o.Stubs
-@.example: @.o.example @.lib C:o.Stubs
- Link $(Linkflags) @.o.example @.lib C:o.Stubs
-
-install: @.lib
- cdir $(libdest)
- cdir $(libdest).h
- @copy @.h.zlib $(libdest).h.zlib A~C~DF~L~N~P~Q~RS~TV
- @copy @.h.zconf $(libdest).h.zconf A~C~DF~L~N~P~Q~RS~TV
- @copy @.lib $(libdest).lib A~C~DF~L~N~P~Q~RS~TV
- @echo okay, installed zlib in $(libdest)
-
-clean:; remove @.minigzip
- remove @.example
- remove @.libc
- -wipe @.o.* F~r~cV
- remove @.fred
-
-# User-editable dependencies:
-.c.o:
- cc $(ccflags) -o $@ $<
-
-# Static dependencies:
-
-# Dynamic dependencies:
-o.example: c.example
-o.example: h.zlib
-o.example: h.zconf
-o.minigzip: c.minigzip
-o.minigzip: h.zlib
-o.minigzip: h.zconf
-o.adler32: c.adler32
-o.adler32: h.zlib
-o.adler32: h.zconf
-o.compress: c.compress
-o.compress: h.zlib
-o.compress: h.zconf
-o.crc32: c.crc32
-o.crc32: h.zlib
-o.crc32: h.zconf
-o.deflate: c.deflate
-o.deflate: h.deflate
-o.deflate: h.zutil
-o.deflate: h.zlib
-o.deflate: h.zconf
-o.gzio: c.gzio
-o.gzio: h.zutil
-o.gzio: h.zlib
-o.gzio: h.zconf
-o.infblock: c.infblock
-o.infblock: h.zutil
-o.infblock: h.zlib
-o.infblock: h.zconf
-o.infblock: h.infblock
-o.infblock: h.inftrees
-o.infblock: h.infcodes
-o.infblock: h.infutil
-o.infcodes: c.infcodes
-o.infcodes: h.zutil
-o.infcodes: h.zlib
-o.infcodes: h.zconf
-o.infcodes: h.inftrees
-o.infcodes: h.infblock
-o.infcodes: h.infcodes
-o.infcodes: h.infutil
-o.infcodes: h.inffast
-o.inffast: c.inffast
-o.inffast: h.zutil
-o.inffast: h.zlib
-o.inffast: h.zconf
-o.inffast: h.inftrees
-o.inffast: h.infblock
-o.inffast: h.infcodes
-o.inffast: h.infutil
-o.inffast: h.inffast
-o.inflate: c.inflate
-o.inflate: h.zutil
-o.inflate: h.zlib
-o.inflate: h.zconf
-o.inflate: h.infblock
-o.inftrees: c.inftrees
-o.inftrees: h.zutil
-o.inftrees: h.zlib
-o.inftrees: h.zconf
-o.inftrees: h.inftrees
-o.inftrees: h.inffixed
-o.infutil: c.infutil
-o.infutil: h.zutil
-o.infutil: h.zlib
-o.infutil: h.zconf
-o.infutil: h.infblock
-o.infutil: h.inftrees
-o.infutil: h.infcodes
-o.infutil: h.infutil
-o.trees: c.trees
-o.trees: h.deflate
-o.trees: h.zutil
-o.trees: h.zlib
-o.trees: h.zconf
-o.trees: h.trees
-o.uncompr: c.uncompr
-o.uncompr: h.zlib
-o.uncompr: h.zconf
-o.zutil: c.zutil
-o.zutil: h.zutil
-o.zutil: h.zlib
-o.zutil: h.zconf
-zlib 1.1.4 is a general purpose data compression library. All the code
+zlib 1.2.0 is a general purpose data compression library. All the code
is thread safe. The data format used by the zlib library
is described by RFCs (Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
issue of Dr. Dobb's Journal; a copy of the article is available in
http://dogma.net/markn/articles/zlibtool/zlibtool.htm
-The changes made in version 1.1.4 are documented in the file ChangeLog.
-The only changes made since 1.1.3 are bug corrections:
-
-- ZFREE was repeated on same allocation on some error conditions.
- This creates a security problem described in
- http://www.zlib.org/advisory-2002-03-11.txt
-- Returned incorrect error (Z_MEM_ERROR) on some invalid data
-- Avoid accesses before window for invalid distances with inflate window
- less than 32K.
-- force windowBits > 8 to avoid a bug in the encoder for a window size
- of 256 bytes. (A complete fix will be available in 1.1.5).
-
-The beta version 1.1.5beta includes many more changes. A new official
-version 1.1.5 will be released as soon as extensive testing has been
-completed on it.
-
+The changes made in version 1.2.0 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory "contrib".
http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
See the zlib home page http://www.zlib.org for details.
-A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
+A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org>
is in the CPAN (Comprehensive Perl Archive Network) sites
http://www.cpan.org/modules/by-module/Compress/
Copyright notice:
- (C) 1995-2002 Jean-loup Gailly and Mark Adler
+ (C) 1995-2003 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2002 Mark Adler
+ * Copyright (C) 1995-2003 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
if (buf == Z_NULL) return 1L;
while (len > 0) {
- k = len < NMAX ? len : NMAX;
+ k = len < NMAX ? (int)len : NMAX;
len -= k;
while (k >= 16) {
DO16(buf);
--- /dev/null
+To make a shared library:
+
+1. Compile a static library
+2. Use mkexps on that to create libz.exp
+3. Apply the configure.diff patch to configure
+4. Run the new configure to make a new Makefile
+5. Use the new Makefile to make the shared library
+
+Courtesy of dbakker@arrayasolutions.com
--- /dev/null
+*** ../orig/zlib-1.1.4/configure Wed Jul 8 14:19:35 1998
+--- configure Sun Feb 9 11:11:19 2003
+***************
+*** 18,23 ****
+--- 18,24 ----
+ # If you have problems, try without defining CC and CFLAGS before reporting
+ # an error.
+
++ LDFLAGS="-L. -lz"
+ LIBS=libz.a
+ SHAREDLIB=libz.so
+ VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
+***************
+*** 116,121 ****
+--- 117,128 ----
+ SFLAGS=${CFLAGS-"-Kconform_pic -O"}
+ CFLAGS=${CFLAGS-"-O"}
+ LDSHARED=${LDSHARED-"cc -G"};;
++ AIX*)
++ SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
++ CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
++ LDTESTSHARED=${LDSHARED-"cc -G"}
++ LDSHAREDFLAGS="-L. libz.so"
++ LDSHARED=${LDSHARED-"cc -G"};;
+ # send working options for other systems to support@gzip.org
+ *) SFLAGS=${CFLAGS-"-O"}
+ CFLAGS=${CFLAGS-"-O"}
+***************
+*** 127,135 ****
+ echo Checking for shared library support...
+ # we must test in two steps (cc then ld), required at least on SunOS 4.x
+ if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
+! test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
+ CFLAGS="$SFLAGS"
+ LIBS="$SHAREDLIB.$VER"
+ echo Building shared library $SHAREDLIB.$VER with $CC.
+ elif test -z "$old_cc" -a -z "$old_cflags"; then
+ echo No shared library suppport.
+--- 134,143 ----
+ echo Checking for shared library support...
+ # we must test in two steps (cc then ld), required at least on SunOS 4.x
+ if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
+! test "`($LDTESTSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
+ CFLAGS="$SFLAGS"
+ LIBS="$SHAREDLIB.$VER"
++ LDFLAGS="$LDSHAREDFLAGS"
+ echo Building shared library $SHAREDLIB.$VER with $CC.
+ elif test -z "$old_cc" -a -z "$old_cflags"; then
+ echo No shared library suppport.
+***************
+*** 209,212 ****
+--- 217,221 ----
+ /^exec_prefix *=/s%=.*%=$exec_prefix%
+ /^libdir *=/s%=.*%=$libdir%
+ /^includedir *=/s%=.*%=$includedir%
++ /^LDFLAGS *=/s%=.*%=$LDFLAGS%
+ " > Makefile
--- /dev/null
+#!/bin/ksh
+#
+# mkexps - make export list
+# This program creates an export list by combining all the "." and normal names
+# into one list.
+#
+if [[ "$#" -ne 1 ]]
+then
+ print "Usage: mkexps ArchiveFile"
+ exit -2
+fi
+if [[ ! -f $1 ]]
+then
+ print "mkexps: Cannot open file \"$1\""
+ exit -1
+fi
+
+dump -g $1 | awk '
+BEGIN {
+ top = 1
+}
+/^[ ]*[0-9][0-9]*/ {
+ if ( (n = index( $2, "." )) > 0 ) {
+ export_array[ top++ ] = substr( $2, n+1, length( $2 ))
+ }
+ else {
+ export_array[ top++ ] = $2
+ }
+}
+
+END {
+ for ( i = 1; i < top; i++ )
+ {
+ print export_array[ i ]
+ }
+
+}' | sort | uniq
2.1 Introduction
-The real question is, given a Huffman tree, how to decode fast. The most
-important realization is that shorter codes are much more common than
-longer codes, so pay attention to decoding the short codes fast, and let
-the long codes take longer to decode.
+The key question is how to represent a Huffman code (or any prefix code) so
+that you can decode fast. The most important characteristic is that shorter
+codes are much more common than longer codes, so pay attention to decoding the
+short codes fast, and let the long codes take longer to decode.
inflate() sets up a first level table that covers some number of bits of
input less than the length of longest code. It gets that many bits from the
be a first level table to cover all the way to the longest code. However,
building the table ends up taking a lot longer for more bits since short
codes are replicated many times in such a table. What inflate() does is
-simply to make the number of bits in the first table a variable, and set it
-for the maximum speed.
-
-inflate() sends new trees relatively often, so it is possibly set for a
-smaller first level table than an application that has only one tree for
-all the data. For inflate, which has 286 possible codes for the
-literal/length tree, the size of the first table is nine bits. Also the
-distance trees have 30 possible values, and the size of the first table is
-six bits. Note that for each of those cases, the table ended up one bit
-longer than the ``average'' code length, i.e. the code length of an
-approximately flat code which would be a little more than eight bits for
-286 symbols and a little less than five bits for 30 symbols. It would be
-interesting to see if optimizing the first level table for other
-applications gave values within a bit or two of the flat code size.
+simply to make the number of bits in the first table a variable, and then
+to set that variable for the maximum speed.
+
+For inflate, which has 286 possible codes for the literal/length tree, the size
+of the first table is nine bits. Also the distance trees have 30 possible
+values, and the size of the first table is six bits. Note that for each of
+those cases, the table ended up one bit longer than the ``average'' code
+length, i.e. the code length of an approximately flat code which would be a
+little more than eight bits for 286 symbols and a little less than five bits
+for 30 symbols.
2.2 More details on the inflate table lookup
110: -> table X (gobble 3 bits)
111: -> table Y (gobble 3 bits)
-Each entry is what the bits decode to and how many bits that is, i.e. how
+Each entry is what the bits decode as and how many bits that is, i.e. how
many bits to gobble. Or the entry points to another table, with the number of
bits to gobble implicit in the size of the table.
+++ /dev/null
-# Amiga powerUP (TM) Makefile
-# makefile for libpng and SAS C V6.58/7.00 PPC compiler
-# Copyright (C) 1998 by Andreas R. Kleinert
-
-CC = scppc
-CFLAGS = NOSTKCHK NOSINT OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL \
- OPTLOOP OPTRDEP=8 OPTDEP=8 OPTCOMP=8
-LIBNAME = libzip.a
-AR = ppc-amigaos-ar
-AR_FLAGS = cr
-RANLIB = ppc-amigaos-ranlib
-LDFLAGS = -r -o
-LDLIBS = LIB:scppc.a
-LN = ppc-amigaos-ld
-RM = delete quiet
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example minigzip
-
-test: all
- example
- echo hello world | minigzip | minigzip -d
-
-$(LIBNAME): $(OBJS)
- $(AR) $(AR_FLAGS) $@ $(OBJS)
- $(RANLIB) $@
-
-example: example.o $(LIBNAME)
- $(LN) $(LDFLAGS) example LIB:c_ppc.o example.o $(LIBNAME) $(LDLIBS) LIB:end.o
-
-minigzip: minigzip.o $(LIBNAME)
- $(LN) $(LDFLAGS) minigzip LIB:c_ppc.o minigzip.o $(LIBNAME) $(LDLIBS) LIB:end.o
-
-clean:
- $(RM) *.o example minigzip $(LIBNAME) foo.gz
-
-zip:
- zip -ul9 zlib README ChangeLog Makefile Make????.??? Makefile.?? \
- descrip.mms *.[ch]
-
-tgz:
- cd ..; tar cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile \
- zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/*.[ch]
-
-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o: zutil.h zlib.h zconf.h
-compress.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-example.o: zlib.h zconf.h
-gzio.o: zutil.h zlib.h zconf.h
-infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
-minigzip.o: zlib.h zconf.h
-trees.o: deflate.h zutil.h zlib.h zconf.h
-uncompr.o: zlib.h zconf.h
-zutil.o: zutil.h zlib.h zconf.h
+++ /dev/null
-# SMakefile for zlib
-# Modified from the standard UNIX Makefile Copyright Jean-loup Gailly
-# Osma Ahvenlampi <Osma.Ahvenlampi@hut.fi>
-# Amiga, SAS/C 6.56 & Smake
-
-CC=sc
-CFLAGS=OPT
-#CFLAGS=OPT CPU=68030
-#CFLAGS=DEBUG=LINE
-LDFLAGS=LIB z.lib
-
-SCOPTIONS=OPTSCHED OPTINLINE OPTALIAS OPTTIME OPTINLOCAL STRMERGE \
- NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: SCOPTIONS example minigzip
-
-test: all
- `cd`/example
- echo hello world | minigzip | minigzip -d
-
-install: z.lib
- copy zlib.h zconf.h INCLUDE: clone
- copy z.lib LIB: clone
-
-z.lib: $(OBJS)
- oml z.lib r $(OBJS)
-
-example: example.o z.lib
- $(CC) $(CFLAGS) LINK TO $@ example.o $(LDFLAGS)
-
-minigzip: minigzip.o z.lib
- $(CC) $(CFLAGS) LINK TO $@ minigzip.o $(LDFLAGS)
-
-clean:
- -delete force quiet *.o example minigzip z.lib foo.gz *.lnk SCOPTIONS
-
-SCOPTIONS: Smakefile
- copy to $@ <from <
-$(SCOPTIONS)
-<
-
-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o: zutil.h zlib.h zconf.h
-compress.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-example.o: zlib.h zconf.h
-gzio.o: zutil.h zlib.h zconf.h
-infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
-minigzip.o: zlib.h zconf.h
-trees.o: deflate.h zutil.h zlib.h zconf.h
-uncompr.o: zlib.h zconf.h
-zutil.o: zutil.h zlib.h zconf.h
{
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
}
+
+/* ===========================================================================
+ If the default memLevel or windowBits for deflateInit() is changed, then
+ this function needs to be updated.
+ */
+uLong ZEXPORT compressBound (sourceLen)
+ uLong sourceLen;
+{
+ return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+}
SFLAGS=${CFLAGS-"-fPIC -O3"}
CFLAGS="$cflags"
case `(uname -s || echo unknown) 2>/dev/null` in
- Linux | linux) LDSHARED=${LDSHARED-"gcc -shared -Wl,-soname,libz.so.1"};;
- *) LDSHARED=${LDSHARED-"gcc -shared"};;
+ Linux | linux) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
+ HP-UX*) LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
+ shared_ext='.sl'
+ SHAREDLIB='libz.sl';;
+ *) LDSHARED=${LDSHARED-"$cc -shared"};;
esac
else
# find system name and corresponding cc options
SFLAGS=${CFLAGS-"-Kconform_pic -O"}
CFLAGS=${CFLAGS-"-O"}
LDSHARED=${LDSHARED-"cc -G"};;
+ OpenUNIX\ 5)
+ SFLAGS=${CFLAGS-"-KPIC -O"}
+ CFLAGS=${CFLAGS-"-O"}
+ LDSHARED=${LDSHARED-"cc -G"};;
# send working options for other systems to support@gzip.org
*) SFLAGS=${CFLAGS-"-O"}
CFLAGS=${CFLAGS-"-O"}
int main() { return 0; }
EOF
if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
- CFLAGS="$CFLAGS -DHAVE_UNISTD_H"
+ sed < zconf.in.h "/HAVE_UNISTD_H/s%0%1%" > zconf.h
echo "Checking for unistd.h... Yes."
else
+ cp -p zconf.in.h zconf.h
echo "Checking for unistd.h... No."
fi
cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdlib.h>
+
+#if (defined(__MSDOS__) || defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)) && !defined(STDC)
+# define STDC
+#endif
+
+int main()
+{
+#ifndef STDC
+ choke me
+#endif
+
+ return 0;
+}
+EOF
+
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking whether to use vsnprintf() or snprintf()... using vsnprintf()"
+
+ cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{
+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return 0;
+}
+
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for vsnprintf() in stdio.h... Yes."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{
+ int i;
+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ i = vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return 0;
+}
+
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of vsnprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
+ echo "Checking for return value of vsnprintf()... No."
+ echo " WARNING: apparently vsnprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_vsnprintf"
+ echo "Checking for vsnprintf() in stdio.h... No."
+ echo " WARNING: vsnprintf() not found, falling back to vsprintf(). zlib"
+ echo " can build but will be open to possible buffer-overflow security"
+ echo " vulnerabilities."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{
+ int i;
+ char buf[20];
+ va_list ap;
+
+ va_start(ap, fmt);
+ i = vsprintf(buf, fmt, ap);
+ va_end(ap);
+ return 0;
+}
+
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of vsprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_vsprintf_void"
+ echo "Checking for return value of vsprintf()... No."
+ echo " WARNING: apparently vsprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ fi
+else
+ echo "Checking whether to use vsnprintf() or snprintf()... using snprintf()"
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest()
+{
+ char buf[20];
+
+ snprintf(buf, sizeof(buf), "%s", "foo");
+ return 0;
+}
+
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for snprintf() in stdio.h... Yes."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{
+ int i;
+ char buf[20];
+
+ i = snprintf(buf, sizeof(buf), "%s", "foo");
+ return 0;
+}
+
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of snprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_snprintf_void"
+ echo "Checking for return value of snprintf()... No."
+ echo " WARNING: apparently snprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_snprintf"
+ echo "Checking for snprintf() in stdio.h... No."
+ echo " WARNING: snprintf() not found, falling back to sprintf(). zlib"
+ echo " can build but will be open to possible buffer-overflow security"
+ echo " vulnerabilities."
+
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+
+int mytest(char *fmt, ...)
+{
+ int i;
+ char buf[20];
+
+ i = sprintf(buf, "%s", "foo");
+ return 0;
+}
+
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+ echo "Checking for return value of sprintf()... Yes."
+ else
+ CFLAGS="$CFLAGS -DHAS_sprintf_void"
+ echo "Checking for return value of sprintf()... No."
+ echo " WARNING: apparently sprintf() does not return a value. zlib"
+ echo " can build but will be open to possible string-format security"
+ echo " vulnerabilities."
+ fi
+ fi
+fi
+
+cat >$test.c <<EOF
#include <errno.h>
int main() { return 0; }
EOF
asm code for Pentium and Pentium Pro
See http://www.muppetlabs.com/~breadbox/software/assembly.html
-delphi/ by Bob Dellaca <bobdl@xtra.co.nz>
+blast/ by Mark Adler <madler@alumni.caltech.edu>
+ Decompressor for output of PKWare Data Compression Library
+
+delphi/ by Bob Dellaca <bobdl@xtra.co.nz>
Support for Delphi
-delphi2/ by Davide Moretti <dave@rimini.com>
+delphi2/ by Davide Moretti <dave@rimini.com>
Another support for C++Builder and Delphi
+inflate86/ by Chris Anderson <christop@charm.net>
+ Tuned x86 gcc asm code to replace inflate_fast()
+
minizip/ by Gilles Vollant <info@winimage.com>
Mini zip and unzip based on zlib
See http://www.winimage.com/zLibDll/unzip.html
--- /dev/null
+blast: blast.c blast.h
+ cc -DTEST -o blast blast.c
+
+test: blast
+ blast < test.pk | cmp - test.txt
+
+clean:
+ rm -f blast blast.o
--- /dev/null
+Read blast.h for purpose and usage.
+
+Mark Adler
+madler@alumni.caltech.edu
--- /dev/null
+/* blast.c
+ * Copyright (C) 2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in blast.h
+ * version 1.1, 16 Feb 2003
+ *
+ * blast.c decompresses data compressed by the PKWare Compression Library.
+ * This function provides functionality similar to the explode() function of
+ * the PKWare library, hence the name "blast".
+ *
+ * This decompressor is based on the excellent format description provided by
+ * Ben Rudiak-Gould in comp.compression on August 13, 2001. Interestingly, the
+ * example Ben provided in the post is incorrect. The distance 110001 should
+ * instead be 111000. When corrected, the example byte stream becomes:
+ *
+ * 00 04 82 24 25 8f 80 7f
+ *
+ * which decompresses to "AIAIAIAIAIAIA" (without the quotes).
+ */
+
+/*
+ * Change history:
+ *
+ * 1.0 12 Feb 2003 - First version
+ * 1.1 16 Feb 2003 - Fixed distance check for > 4 GB uncompressed data
+ */
+
+#include <setjmp.h> /* for setjmp(), longjmp(), and jmp_buf */
+#include "blast.h" /* prototype for blast() */
+
+#define local static /* for local function definitions */
+#define MAXBITS 13 /* maximum code length */
+#define MAXWIN 4096 /* maximum window size */
+
+/* input and output state */
+struct state {
+ /* input state */
+ blast_in infun; /* input function provided by user */
+ void *inhow; /* opaque information passed to infun() */
+ unsigned char *in; /* next input location */
+ unsigned left; /* available input at in */
+ int bitbuf; /* bit buffer */
+ int bitcnt; /* number of bits in bit buffer */
+
+ /* input limit error return state for bits() and decode() */
+ jmp_buf env;
+
+ /* output state */
+ blast_out outfun; /* output function provided by user */
+ void *outhow; /* opaque information passed to outfun() */
+ unsigned next; /* index of next write location in out[] */
+ int first; /* true to check distances (for first 4K) */
+ unsigned char out[MAXWIN]; /* output buffer and sliding window */
+};
+
+/*
+ * Return need bits from the input stream. This always leaves less than
+ * eight bits in the buffer. bits() works properly for need == 0.
+ *
+ * Format notes:
+ *
+ * - Bits are stored in bytes from the least significant bit to the most
+ * significant bit. Therefore bits are dropped from the bottom of the bit
+ * buffer, using shift right, and new bytes are appended to the top of the
+ * bit buffer, using shift left.
+ */
+local int bits(struct state *s, int need)
+{
+ int val; /* bit accumulator */
+
+ /* load at least need bits into val */
+ val = s->bitbuf;
+ while (s->bitcnt < need) {
+ if (s->left == 0) {
+ s->left = s->infun(s->inhow, &(s->in));
+ if (s->left == 0) longjmp(s->env, 1); /* out of input */
+ }
+ val |= (int)(*(s->in)++) << s->bitcnt; /* load eight bits */
+ s->left--;
+ s->bitcnt += 8;
+ }
+
+ /* drop need bits and update buffer, always zero to seven bits left */
+ s->bitbuf = val >> need;
+ s->bitcnt -= need;
+
+ /* return need bits, zeroing the bits above that */
+ return val & ((1 << need) - 1);
+}
+
+/*
+ * Huffman code decoding tables. count[1..MAXBITS] is the number of symbols of
+ * each length, which for a canonical code are stepped through in order.
+ * symbol[] are the symbol values in canonical order, where the number of
+ * entries is the sum of the counts in count[]. The decoding process can be
+ * seen in the function decode() below.
+ */
+struct huffman {
+ short *count; /* number of symbols of each length */
+ short *symbol; /* canonically ordered symbols */
+};
+
+/*
+ * Decode a code from the stream s using huffman table h. Return the symbol or
+ * a negative value if there is an error. If all of the lengths are zero, i.e.
+ * an empty code, or if the code is incomplete and an invalid code is received,
+ * then -9 is returned after reading MAXBITS bits.
+ *
+ * Format notes:
+ *
+ * - The codes as stored in the compressed data are bit-reversed relative to
+ * a simple integer ordering of codes of the same lengths. Hence below the
+ * bits are pulled from the compressed data one at a time and used to
+ * build the code value reversed from what is in the stream in order to
+ * permit simple integer comparisons for decoding.
+ *
+ * - The first code for the shortest length is all ones. Subsequent codes of
+ * the same length are simply integer decrements of the previous code. When
+ * moving up a length, a one bit is appended to the code. For a complete
+ * code, the last code of the longest length will be all zeros. To support
+ * this ordering, the bits pulled during decoding are inverted to apply the
+ * more "natural" ordering starting with all zeros and incrementing.
+ */
+local int decode(struct state *s, struct huffman *h)
+{
+ int len; /* current number of bits in code */
+ int code; /* len bits being decoded */
+ int first; /* first code of length len */
+ int count; /* number of codes of length len */
+ int index; /* index of first code of length len in symbol table */
+ int bitbuf; /* bits from stream */
+ int left; /* bits left in next or left to process */
+ short *next; /* next number of codes */
+
+ bitbuf = s->bitbuf;
+ left = s->bitcnt;
+ code = first = index = 0;
+ len = 1;
+ next = h->count + 1;
+ while (1) {
+ while (left--) {
+ code |= (bitbuf & 1) ^ 1; /* invert code */
+ bitbuf >>= 1;
+ count = *next++;
+ if (code < first + count) { /* if length len, return symbol */
+ s->bitbuf = bitbuf;
+ s->bitcnt = (s->bitcnt - len) & 7;
+ return h->symbol[index + (code - first)];
+ }
+ index += count; /* else update for next length */
+ first += count;
+ first <<= 1;
+ code <<= 1;
+ len++;
+ }
+ left = (MAXBITS+1) - len;
+ if (left == 0) break;
+ if (s->left == 0) {
+ s->left = s->infun(s->inhow, &(s->in));
+ if (s->left == 0) longjmp(s->env, 1); /* out of input */
+ }
+ bitbuf = *(s->in)++;
+ s->left--;
+ if (left > 8) left = 8;
+ }
+ return -9; /* ran out of codes */
+}
+
+/*
+ * Given a list of repeated code lengths rep[0..n-1], where each byte is a
+ * count (high four bits + 1) and a code length (low four bits), generate the
+ * list of code lengths. This compaction reduces the size of the object code.
+ * Then given the list of code lengths length[0..n-1] representing a canonical
+ * Huffman code for n symbols, construct the tables required to decode those
+ * codes. Those tables are the number of codes of each length, and the symbols
+ * sorted by length, retaining their original order within each length. The
+ * return value is zero for a complete code set, negative for an over-
+ * subscribed code set, and positive for an incomplete code set. The tables
+ * can be used if the return value is zero or positive, but they cannot be used
+ * if the return value is negative. If the return value is zero, it is not
+ * possible for decode() using that table to return an error--any stream of
+ * enough bits will resolve to a symbol. If the return value is positive, then
+ * it is possible for decode() using that table to return an error for received
+ * codes past the end of the incomplete lengths.
+ */
+local int construct(struct huffman *h, const unsigned char *rep, int n)
+{
+ int symbol; /* current symbol when stepping through length[] */
+ int len; /* current length when stepping through h->count[] */
+ int left; /* number of possible codes left of current length */
+ short offs[MAXBITS+1]; /* offsets in symbol table for each length */
+ short length[256]; /* code lengths */
+
+ /* convert compact repeat counts into symbol bit length list */
+ symbol = 0;
+ do {
+ len = *rep++;
+ left = (len >> 4) + 1;
+ len &= 15;
+ do {
+ length[symbol++] = len;
+ } while (--left);
+ } while (--n);
+ n = symbol;
+
+ /* count number of codes of each length */
+ for (len = 0; len <= MAXBITS; len++)
+ h->count[len] = 0;
+ for (symbol = 0; symbol < n; symbol++)
+ (h->count[length[symbol]])++; /* assumes lengths are within bounds */
+ if (h->count[0] == n) /* no codes! */
+ return 0; /* complete, but decode() will fail */
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1; /* one possible code of zero length */
+ for (len = 1; len <= MAXBITS; len++) {
+ left <<= 1; /* one more bit, double codes left */
+ left -= h->count[len]; /* deduct count from possible codes */
+ if (left < 0) return left; /* over-subscribed--return negative */
+ } /* left > 0 means incomplete */
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++)
+ offs[len + 1] = offs[len] + h->count[len];
+
+ /*
+ * put symbols in table sorted by length, by symbol order within each
+ * length
+ */
+ for (symbol = 0; symbol < n; symbol++)
+ if (length[symbol] != 0)
+ h->symbol[offs[length[symbol]]++] = symbol;
+
+ /* return zero for complete set, positive for incomplete set */
+ return left;
+}
+
+/*
+ * Decode PKWare Compression Library stream.
+ *
+ * Format notes:
+ *
+ * - First byte is 0 if literals are uncoded or 1 if they are coded. Second
+ * byte is 4, 5, or 6 for the number of extra bits in the distance code.
+ * This is the base-2 logarithm of the dictionary size minus six.
+ *
+ * - Compressed data is a combination of literals and length/distance pairs
+ * terminated by an end code. Literals are either Huffman coded or
+ * uncoded bytes. A length/distance pair is a coded length followed by a
+ * coded distance to represent a string that occurs earlier in the
+ * uncompressed data that occurs again at the current location.
+ *
+ * - A bit preceding a literal or length/distance pair indicates which comes
+ * next, 0 for literals, 1 for length/distance.
+ *
+ * - If literals are uncoded, then the next eight bits are the literal, in the
+ * normal bit order in th stream, i.e. no bit-reversal is needed. Similarly,
+ * no bit reversal is needed for either the length extra bits or the distance
+ * extra bits.
+ *
+ * - Literal bytes are simply written to the output. A length/distance pair is
+ * an instruction to copy previously uncompressed bytes to the output. The
+ * copy is from distance bytes back in the output stream, copying for length
+ * bytes.
+ *
+ * - Distances pointing before the beginning of the output data are not
+ * permitted.
+ *
+ * - Overlapped copies, where the length is greater than the distance, are
+ * allowed and common. For example, a distance of one and a length of 518
+ * simply copies the last byte 518 times. A distance of four and a length of
+ * twelve copies the last four bytes three times. A simple forward copy
+ * ignoring whether the length is greater than the distance or not implements
+ * this correctly.
+ */
+local int decomp(struct state *s)
+{
+ int lit; /* true if literals are coded */
+ int dict; /* log2(dictionary size) - 6 */
+ int symbol; /* decoded symbol, extra bits for distance */
+ int len; /* length for copy */
+ int dist; /* distance for copy */
+ int copy; /* copy counter */
+ unsigned char *from, *to; /* copy pointers */
+ static int virgin = 1; /* build tables once */
+ static short litcnt[MAXBITS+1], litsym[256]; /* litcode memory */
+ static short lencnt[MAXBITS+1], lensym[16]; /* lencode memory */
+ static short distcnt[MAXBITS+1], distsym[64]; /* distcode memory */
+ static struct huffman litcode = {litcnt, litsym}; /* length code */
+ static struct huffman lencode = {lencnt, lensym}; /* length code */
+ static struct huffman distcode = {distcnt, distsym};/* distance code */
+ /* bit lengths of literal codes */
+ static const unsigned char litlen[] = {
+ 11, 124, 8, 7, 28, 7, 188, 13, 76, 4, 10, 8, 12, 10, 12, 10, 8, 23, 8,
+ 9, 7, 6, 7, 8, 7, 6, 55, 8, 23, 24, 12, 11, 7, 9, 11, 12, 6, 7, 22, 5,
+ 7, 24, 6, 11, 9, 6, 7, 22, 7, 11, 38, 7, 9, 8, 25, 11, 8, 11, 9, 12,
+ 8, 12, 5, 38, 5, 38, 5, 11, 7, 5, 6, 21, 6, 10, 53, 8, 7, 24, 10, 27,
+ 44, 253, 253, 253, 252, 252, 252, 13, 12, 45, 12, 45, 12, 61, 12, 45,
+ 44, 173};
+ /* bit lengths of length codes 0..15 */
+ static const unsigned char lenlen[] = {2, 35, 36, 53, 38, 23};
+ /* bit lengths of distance codes 0..63 */
+ static const unsigned char distlen[] = {2, 20, 53, 230, 247, 151, 248};
+ static const short base[16] = { /* base for length codes */
+ 3, 2, 4, 5, 6, 7, 8, 9, 10, 12, 16, 24, 40, 72, 136, 264};
+ static const char extra[16] = { /* extra bits for length codes */
+ 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8};
+
+ /* set up decoding tables (once--might not be thread-safe) */
+ if (virgin) {
+ construct(&litcode, litlen, sizeof(litlen));
+ construct(&lencode, lenlen, sizeof(lenlen));
+ construct(&distcode, distlen, sizeof(distlen));
+ virgin = 0;
+ }
+
+ /* read header */
+ lit = bits(s, 8);
+ if (lit > 1) return -1;
+ dict = bits(s, 8);
+ if (dict < 4 || dict > 6) return -2;
+
+ /* decode literals and length/distance pairs */
+ do {
+ if (bits(s, 1)) {
+ /* get length */
+ symbol = decode(s, &lencode);
+ len = base[symbol] + bits(s, extra[symbol]);
+ if (len == 519) break; /* end code */
+
+ /* get distance */
+ symbol = len == 2 ? 2 : dict;
+ dist = decode(s, &distcode) << symbol;
+ dist += bits(s, symbol);
+ dist++;
+ if (s->first && dist > s->next)
+ return -3; /* distance too far back */
+
+ /* copy length bytes from distance bytes back */
+ do {
+ to = s->out + s->next;
+ from = to - dist;
+ copy = MAXWIN;
+ if (s->next < dist) {
+ from += copy;
+ copy = dist;
+ }
+ copy -= s->next;
+ if (copy > len) copy = len;
+ len -= copy;
+ s->next += copy;
+ do {
+ *to++ = *from++;
+ } while (--copy);
+ if (s->next == MAXWIN) {
+ if (s->outfun(s->outhow, s->out, s->next)) return 1;
+ s->next = 0;
+ s->first = 0;
+ }
+ } while (len != 0);
+ }
+ else {
+ /* get literal and write it */
+ symbol = lit ? decode(s, &litcode) : bits(s, 8);
+ s->out[s->next++] = symbol;
+ if (s->next == MAXWIN) {
+ if (s->outfun(s->outhow, s->out, s->next)) return 1;
+ s->next = 0;
+ s->first = 0;
+ }
+ }
+ } while (1);
+ return 0;
+}
+
+/* See comments in blast.h */
+int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow)
+{
+ struct state s; /* input/output state */
+ int err; /* return value */
+
+ /* initialize input state */
+ s.infun = infun;
+ s.inhow = inhow;
+ s.left = 0;
+ s.bitbuf = 0;
+ s.bitcnt = 0;
+
+ /* initialize output state */
+ s.outfun = outfun;
+ s.outhow = outhow;
+ s.next = 0;
+ s.first = 1;
+
+ /* return if bits() or decode() tries to read past available input */
+ if (setjmp(s.env) != 0) /* if came back here via longjmp(), */
+ err = 2; /* then skip decomp(), return error */
+ else
+ err = decomp(&s); /* decompress */
+
+ /* write any leftover output and update the error code if needed */
+ if (err != 1 && s.next && s.outfun(s.outhow, s.out, s.next) && err == 0)
+ err = 1;
+ return err;
+}
+
+#ifdef TEST
+/* Example of how to use blast() */
+#include <stdio.h>
+#include <stdlib.h>
+
+#define CHUNK 16384
+
+local unsigned inf(void *how, unsigned char **buf)
+{
+ static unsigned char hold[CHUNK];
+
+ *buf = hold;
+ return fread(hold, 1, CHUNK, (FILE *)how);
+}
+
+local int outf(void *how, unsigned char *buf, unsigned len)
+{
+ return fwrite(buf, 1, len, (FILE *)how) != len;
+}
+
+/* Decompress a PKWare Compression Library stream from stdin to stdout */
+int main(void)
+{
+ int ret, n;
+
+ /* decompress to stdout */
+ ret = blast(inf, stdin, outf, stdout);
+ if (ret != 0) fprintf(stderr, "blast error: %d\n", ret);
+
+ /* see if there are any leftover bytes */
+ n = 0;
+ while (getchar() != EOF) n++;
+ if (n) fprintf(stderr, "blast warning: %d unused bytes of input\n", n);
+
+ /* return blast() error code */
+ return ret;
+}
+#endif
--- /dev/null
+/* blast.h -- interface for blast.c
+ Copyright (C) 2003 Mark Adler
+ version 1.1, 16 Feb 2003
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the author be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Mark Adler madler@alumni.caltech.edu
+ */
+
+
+/*
+ * blast() decompresses the PKWare Data Compression Library (DCL) compressed
+ * format. It provides the same functionality as the explode() function in
+ * that library. (Note: PKWare overused the "implode" verb, and the format
+ * used by their library implode() function is completely different and
+ * incompatible with the implode compression method supported by PKZIP.)
+ */
+
+
+typedef unsigned (*blast_in)(void *how, unsigned char **buf);
+typedef int (*blast_out)(void *how, unsigned char *buf, unsigned len);
+/* Definitions for input/output functions passed to blast(). See below for
+ * what the provided functions need to do.
+ */
+
+
+int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow);
+/* Decompress input to output using the provided infun() and outfun() calls.
+ * On success, the return value of blast() is zero. If there is an error in
+ * the source data, i.e. it is not in the proper format, then a negative value
+ * is returned. If there is not enough input available or there is not enough
+ * output space, then a positive error is returned.
+ *
+ * The input function is invoked: len = infun(how, &buf), where buf is set by
+ * infun() to point to the input buffer, and infun() returns the number of
+ * available bytes there. If infun() returns zero, then blast() returns with
+ * an input error. (blast() only asks for input if it needs it.) inhow is for
+ * use by the application to pass an input descriptor to infun(), if desired.
+ *
+ * The output function is invoked: err = outfun(how, buf, len), where the bytes
+ * to be written are buf[0..len-1]. If err is not zero, then blast() returns
+ * with an output error. outfun() is always called with len <= 4096. outhow
+ * is for use by the application to pass an output descriptor to outfun(), if
+ * desired.
+ *
+ * The return codes are:
+ *
+ * 2: ran out of input before completing decompression
+ * 1: output error before completing decompression
+ * 0: successful decompression
+ * -1: literal flag not zero or one
+ * -2: dictionary size not in 4..6
+ * -3: distance is too far back
+ *
+ * At the bottom of blast.c is an example program that uses blast() that can be
+ * compiled to produce a command-line decompression filter by defining TEST.
+ */
--- /dev/null
+AIAIAIAIAIAIA
\ No newline at end of file
--- /dev/null
+/*\r
+ * inffast.S is a hand tuned assembler version of:\r
+ *\r
+ * inffast.c -- fast decoding\r
+ * Copyright (C) 1995-2003 Mark Adler\r
+ * For conditions of distribution and use, see copyright notice in zlib.h \r
+ *\r
+ * Copyright (C) 2003 Chris Anderson <christop@charm.net>\r
+ * Please use the copyright conditions above.\r
+ * \r
+ * This version (Jan-23-2003) of inflate_fast was coded and tested under\r
+ * GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution. On that\r
+ * machine, I found that gzip style archives decompressed about 20% faster than\r
+ * the gcc-3.2 -O3 -fomit-frame-pointer compiled version. Your results will\r
+ * depend on how large of a buffer is used for z_stream.next_in & next_out\r
+ * (8K-32K worked best for my 256K cpu cache) and how much overhead there is in\r
+ * stream processing I/O and crc32/addler32. In my case, this routine used\r
+ * 70% of the cpu time and crc32 used 20%.\r
+ *\r
+ * I am confident that this version will work in the general case, but I have\r
+ * not tested a wide variety of datasets or a wide variety of platforms.\r
+ *\r
+ * Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating.\r
+ * It should be a runtime flag instead of compile time flag...\r
+ */\r
+\r
+.file "inffast.S"\r
+\r
+.globl inflate_fast\r
+\r
+.text\r
+.align 4,0\r
+.L_invalid_literal_length_code_msg:\r
+.string "invalid literal/length code"\r
+\r
+.align 4,0\r
+.L_invalid_distance_code_msg:\r
+.string "invalid distance code"\r
+\r
+.align 4,0\r
+.L_invalid_distance_too_far_msg:\r
+.string "invalid distance too far back"\r
+\r
+#if defined( USE_MMX )\r
+.align 4,0\r
+.L_mask: /* mask[N] = ( 1 << N ) - 1 */\r
+.long 0\r
+.long 1\r
+.long 3\r
+.long 7\r
+.long 15\r
+.long 31\r
+.long 63\r
+.long 127\r
+.long 255\r
+.long 511\r
+.long 1023\r
+.long 2047\r
+.long 4095\r
+.long 8191\r
+.long 16383\r
+.long 32767\r
+.long 65535\r
+.long 131071\r
+.long 262143\r
+.long 524287\r
+.long 1048575\r
+.long 2097151\r
+.long 4194303\r
+.long 8388607\r
+.long 16777215\r
+.long 33554431\r
+.long 67108863\r
+.long 134217727\r
+.long 268435455\r
+.long 536870911\r
+.long 1073741823\r
+.long 2147483647\r
+.long 4294967295\r
+#endif\r
+\r
+.text\r
+\r
+/*\r
+ * struct z_stream offsets, in zlib.h\r
+ */\r
+#define next_in_strm 0 /* strm->next_in */\r
+#define avail_in_strm 4 /* strm->avail_in */\r
+#define next_out_strm 12 /* strm->next_out */\r
+#define avail_out_strm 16 /* strm->avail_out */\r
+#define msg_strm 24 /* strm->msg */\r
+#define state_strm 28 /* strm->state */\r
+\r
+/*\r
+ * struct inflate_state offsets, in inflate.h\r
+ */\r
+#define mode_state 0 /* state->mode */\r
+#define wsize_state 32 /* state->wsize */\r
+#define write_state 36 /* state->write */\r
+#define window_state 40 /* state->window */\r
+#define hold_state 44 /* state->hold */\r
+#define bits_state 48 /* state->bits */\r
+#define lencode_state 64 /* state->lencode */\r
+#define distcode_state 68 /* state->distcode */\r
+#define lenbits_state 72 /* state->lenbits */\r
+#define distbits_state 76 /* state->distbits */\r
+\r
+/*\r
+ * inflate_fast's activation record\r
+ */\r
+#define local_var_size 56 /* how much local space for vars */\r
+#define strm_sp 80 /* first arg: z_stream * (local_var_size + 24) */\r
+#define start_sp 84 /* second arg: unsigned int (local_var_size + 28) */\r
+\r
+/*\r
+ * offsets for local vars on stack\r
+ */\r
+#define out 52 /* unsigned char* */\r
+#define window 48 /* unsigned char* */\r
+#define wsize 44 /* unsigned int */\r
+#define write 40 /* unsigned int */\r
+#define in 36 /* unsigned char* */\r
+#define beg 32 /* unsigned char* */\r
+#define dist 28 /* unsigned int */\r
+#define len 24 /* unsigned int */\r
+#define last 20 /* unsigned char* */\r
+#define end 16 /* unsigned char* */\r
+#define dcode 12 /* code* */\r
+#define lcode 8 /* code* */\r
+#define dmask 4 /* unsigned int */\r
+#define lmask 0 /* unsigned int */\r
+\r
+/*\r
+ * typedef enum inflate_mode consts, in inflate.h\r
+ */\r
+#ifndef NO_GUNZIP\r
+#define GUNZIP\r
+#endif\r
+\r
+#ifdef GUNZIP\r
+#define INFLATE_MODE_TYPE 11 /* state->mode flags enum-ed in inflate.h */\r
+#define INFLATE_MODE_BAD 26\r
+#else\r
+#define INFLATE_MODE_TYPE 3\r
+#define INFLATE_MODE_BAD 17\r
+#endif\r
+\r
+\r
+.align 16,0x90\r
+inflate_fast:\r
+ pushl %edi\r
+ pushl %esi\r
+ pushl %ebp\r
+ pushl %ebx\r
+ pushf /* save eflags (strm_sp, state_sp assumes this is 32 bits) */\r
+ subl $local_var_size, %esp\r
+ cld\r
+#if defined( USE_MMX )\r
+ emms\r
+#endif\r
+\r
+#define strm_r %esi\r
+#define state_r %edi\r
+\r
+ movl strm_sp(%esp), strm_r\r
+ movl state_strm(strm_r), state_r\r
+\r
+ /* in = strm->next_in;\r
+ * out = strm->next_out;\r
+ * last = in + strm->avail_in - 5;\r
+ * beg = out - (start - strm->avail_out);\r
+ * end = out + (strm->avail_out - 257);\r
+ */\r
+ movl next_in_strm(strm_r), %eax\r
+ movl next_out_strm(strm_r), %ebx\r
+ movl avail_in_strm(strm_r), %edx\r
+ movl avail_out_strm(strm_r), %ecx\r
+ movl start_sp(%esp), %ebp\r
+\r
+ addl %eax, %edx /* avail_in += next_in */\r
+ subl $5, %edx /* avail_in -= 5 */\r
+\r
+ subl %ecx, %ebp /* start -= avail_out */\r
+ negl %ebp /* start = -start */\r
+ addl %ebx, %ebp /* start += next_out */\r
+\r
+ subl $257, %ecx /* avail_out -= 257 */\r
+ addl %ebx, %ecx /* avail_out += out */\r
+\r
+ movl %eax, in(%esp)\r
+ movl %ebx, out(%esp)\r
+ movl %edx, last(%esp)\r
+ movl %ebp, beg(%esp)\r
+ movl %ecx, end(%esp)\r
+\r
+ /* wsize = state->wsize;\r
+ * write = state->write;\r
+ * window = state->window;\r
+ * hold = state->hold;\r
+ * bits = state->bits;\r
+ * lcode = state->lencode;\r
+ * dcode = state->distcode;\r
+ * lmask = ( 1 << state->lenbits ) - 1;\r
+ * dmask = ( 1 << state->distbits ) - 1;\r
+ */\r
+\r
+ movl lencode_state(state_r), %eax\r
+ movl distcode_state(state_r), %ecx\r
+\r
+ movl %eax, lcode(%esp)\r
+ movl %ecx, dcode(%esp)\r
+\r
+ movl $1, %eax\r
+ movl lenbits_state(state_r), %ecx\r
+ shll %cl, %eax\r
+ decl %eax\r
+ movl %eax, lmask(%esp)\r
+\r
+ movl $1, %eax\r
+ movl distbits_state(state_r), %ecx\r
+ shll %cl, %eax\r
+ decl %eax\r
+ movl %eax, dmask(%esp)\r
+\r
+ movl wsize_state(state_r), %eax\r
+ movl write_state(state_r), %ecx\r
+ movl window_state(state_r), %edx\r
+\r
+ movl %eax, wsize(%esp)\r
+ movl %ecx, write(%esp)\r
+ movl %edx, window(%esp)\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+#define hold_r %ebp\r
+#define bits_r %bl\r
+#define bitslong_r %ebx\r
+\r
+ movl hold_state(state_r), hold_r\r
+ movl bits_state(state_r), bitslong_r\r
+\r
+#else /* USE_MMX */\r
+\r
+#define hold_mm %mm0\r
+#define bits_r %ebp\r
+#define bitslong_r %ebp\r
+\r
+ movl hold_state(state_r), %ebx\r
+ movl bits_state(state_r), bitslong_r\r
+\r
+#endif\r
+\r
+#undef strm_r\r
+#undef state_r\r
+#define in_r %esi\r
+#define from_r %esi\r
+#define out_r %edi\r
+\r
+ movl in(%esp), in_r\r
+\r
+#if ! defined ( USE_MMX )\r
+\r
+ /* align in_r on word boundary */\r
+ testl $1, in_r\r
+ jz .L_is_aligned\r
+ xorl %eax, %eax\r
+ movb (in_r), %al\r
+ incl in_r\r
+ movb bits_r, %cl\r
+ addb $8, bits_r\r
+ shll %cl, %eax\r
+ orl %eax, hold_r\r
+\r
+#else\r
+ /* align in_r on long boundary */\r
+.L_align_long:\r
+ testl $3, in_r\r
+ jz .L_is_aligned\r
+ xorl %eax, %eax\r
+ movb (in_r), %al\r
+ incl in_r\r
+ movl bits_r, %ecx\r
+ addl $8, bits_r\r
+ shll %cl, %eax\r
+ orl %eax, %ebx\r
+ jmp .L_align_long\r
+\r
+#endif\r
+\r
+.L_is_aligned:\r
+ movl out(%esp), out_r\r
+\r
+#if defined ( USE_MMX )\r
+\r
+#define used_mm %mm1\r
+#define dmask2_mm %mm2\r
+#define lmask2_mm %mm3\r
+#define lmask_mm %mm4\r
+#define dmask_mm %mm5\r
+#define tmp_mm %mm6\r
+\r
+ movl out(%esp), out_r\r
+ movd lmask(%esp), lmask_mm \r
+ movq lmask_mm, lmask2_mm\r
+ movd dmask(%esp), dmask_mm\r
+ movq dmask_mm, dmask2_mm\r
+ movd %ebx, hold_mm\r
+ pxor used_mm, used_mm\r
+ movl lcode(%esp), %ebx /* ebx = lcode */\r
+#endif\r
+\r
+ jmp .L_do_loop\r
+\r
+.align 16,0x90\r
+\r
+#if ! defined ( USE_MMX )\r
+\r
+.L_do_loop:\r
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out\r
+ *\r
+ * do { \r
+ * if (bits < 15) {\r
+ * hold |= *((unsigned short *)in)++ << bits;\r
+ * bits += 16\r
+ * }\r
+ * this = lcode[hold & lmask]\r
+ */\r
+ cmpb $15, bits_r\r
+ ja .L_get_length_code /* if (15 < bits) */\r
+\r
+ xorl %eax, %eax\r
+ lodsw /* al = *(ushort *)in++ */\r
+ movb bits_r, %cl /* cl = bits, needs it for shifting */\r
+ addb $16, bits_r /* bits += 16 */\r
+ shll %cl, %eax\r
+ orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
+\r
+.L_get_length_code:\r
+ movl lmask(%esp), %edx /* edx = lmask */\r
+ movl lcode(%esp), %ecx /* ecx = lcode */\r
+ andl hold_r, %edx /* edx &= hold */\r
+ movl (%ecx,%edx,4), %eax /* eax = lcode[hold & lmask] */\r
+\r
+#else /* USE_MMX */\r
+\r
+.L_do_loop:\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+\r
+ cmpl $32, bits_r\r
+ ja .L_get_length_code /* if (32 < bits) */\r
+\r
+ movd bits_r, tmp_mm\r
+ movd (in_r), %mm7\r
+ addl $4, in_r\r
+ psllq tmp_mm, %mm7\r
+ addl $32, bits_r\r
+ por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */\r
+\r
+.L_get_length_code:\r
+ pand hold_mm, lmask_mm\r
+ movd lmask_mm, %eax\r
+ movq lmask2_mm, lmask_mm\r
+ movl (%ebx,%eax,4), %eax /* eax = lcode[hold & lmask] */\r
+\r
+#endif\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+.L_dolen:\r
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out\r
+ *\r
+ * dolen:\r
+ * bits -= this.bits;\r
+ * hold >>= this.bits\r
+ */\r
+ movb %ah, %cl /* cl = this.bits */\r
+ subb %ah, bits_r /* bits -= this.bits */\r
+ shrl %cl, hold_r /* hold >>= this.bits */\r
+\r
+ /* check if op is a literal\r
+ * if (op == 0) {\r
+ * PUP(out) = this.val;\r
+ * }\r
+ */\r
+ testb %al, %al\r
+ jnz .L_test_for_length_base /* if (op != 0) 45.7% */\r
+\r
+ shrl $16, %eax /* output this.val char */\r
+ stosb\r
+\r
+#else /* USE_MMX */\r
+\r
+#define len_r %edx\r
+\r
+.L_dolen:\r
+ movzbl %ah, %ecx /* ecx = this.bits */\r
+ movl %eax, len_r /* len = this */\r
+ shrl $16, len_r /* len = this.val */\r
+ movd %ecx, used_mm\r
+ subl %ecx, bits_r /* bits -= this.bits */\r
+\r
+ testb %al, %al\r
+ jnz .L_test_for_length_base /* if (op != 0) 45.7% */\r
+\r
+ movb %dl, (out_r)\r
+ incl out_r\r
+\r
+#endif\r
+\r
+.L_while_test:\r
+ /* while (in < last && out < end)\r
+ */\r
+ cmpl out_r, end(%esp)\r
+ jbe .L_break_loop /* if (out >= end) */\r
+\r
+ cmpl in_r, last(%esp)\r
+ ja .L_do_loop /* if (in < last) */\r
+ jmp .L_break_loop\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+.L_test_for_length_base:\r
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len\r
+ *\r
+ * else if (op & 16) {\r
+ * len = this.val\r
+ * op &= 15\r
+ * if (op) {\r
+ * if (op > bits) {\r
+ * hold |= *((unsigned short *)in)++ << bits;\r
+ * bits += 16\r
+ * }\r
+ * len += hold & mask[op];\r
+ * bits -= op;\r
+ * hold >>= op;\r
+ * }\r
+ */\r
+#define len_r %edx\r
+ movl %eax, len_r /* len = this */\r
+ shrl $16, len_r /* len = this.val */\r
+ movb %al, %cl\r
+\r
+ testb $16, %al\r
+ jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */\r
+ andb $15, %cl /* op &= 15 */\r
+ jz .L_save_len /* if (!op) */\r
+ cmpb %cl, bits_r\r
+ jae .L_add_bits_to_len /* if (op <= bits) */\r
+\r
+ movb %cl, %ch /* stash op in ch, freeing cl */\r
+ xorl %eax, %eax\r
+ lodsw /* al = *(ushort *)in++ */\r
+ movb bits_r, %cl /* cl = bits, needs it for shifting */\r
+ addb $16, bits_r /* bits += 16 */\r
+ shll %cl, %eax\r
+ orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
+ movb %ch, %cl /* move op back to ecx */\r
+\r
+.L_add_bits_to_len:\r
+ movl $1, %eax\r
+ shll %cl, %eax\r
+ decl %eax\r
+ subb %cl, bits_r\r
+ andl hold_r, %eax /* eax &= hold */\r
+ shrl %cl, hold_r\r
+ addl %eax, len_r /* len += hold & mask[op] */\r
+\r
+.L_save_len:\r
+ movl len_r, len(%esp) /* save len */\r
+#undef len_r\r
+\r
+.L_decode_distance:\r
+ /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ *\r
+ * if (bits < 15) {\r
+ * hold |= *((unsigned short *)in)++ << bits;\r
+ * bits += 16\r
+ * }\r
+ * this = dcode[hold & dmask];\r
+ * dodist:\r
+ * bits -= this.bits;\r
+ * hold >>= this.bits;\r
+ * op = this.op;\r
+ */\r
+\r
+ cmpb $15, bits_r\r
+ ja .L_get_distance_code /* if (15 < bits) */\r
+\r
+ xorl %eax, %eax\r
+ lodsw /* al = *(ushort *)in++ */\r
+ movb bits_r, %cl /* cl = bits, needs it for shifting */\r
+ addb $16, bits_r /* bits += 16 */\r
+ shll %cl, %eax\r
+ orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
+\r
+.L_get_distance_code:\r
+ movl dmask(%esp), %edx /* edx = dmask */\r
+ movl dcode(%esp), %ecx /* ecx = dcode */\r
+ andl hold_r, %edx /* edx &= hold */\r
+ movl (%ecx,%edx,4), %eax /* eax = dcode[hold & dmask] */\r
+\r
+#else /* USE_MMX */\r
+\r
+.L_test_for_length_base:\r
+ testb $16, %al\r
+ jz .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */\r
+ andl $15, %eax /* op &= 15 */\r
+ jz .L_decode_distance /* if (!op) */\r
+\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+ movd %eax, used_mm\r
+ movd hold_mm, %ecx\r
+ subl %eax, bits_r\r
+ andl .L_mask(,%eax,4), %ecx\r
+ addl %ecx, len_r /* len += hold & mask[op] */\r
+\r
+.L_decode_distance:\r
+\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+\r
+ cmpl $32, bits_r\r
+ ja .L_get_dist_code /* if (32 < bits) */\r
+\r
+ movd bits_r, tmp_mm\r
+ movd (in_r), %mm7\r
+ addl $4, in_r\r
+ psllq tmp_mm, %mm7\r
+ addl $32, bits_r\r
+ por %mm7, hold_mm /* hold_mm |= *((uint *)in)++ << bits */\r
+\r
+.L_get_dist_code:\r
+ movl dcode(%esp), %ebx /* ebx = dcode */\r
+ pand hold_mm, dmask_mm\r
+ movd dmask_mm, %eax\r
+ movq dmask2_mm, dmask_mm\r
+ movl (%ebx,%eax,4), %eax /* eax = dcode[hold & lmask] */\r
+\r
+#endif\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+#define dist_r %edx\r
+.L_dodist:\r
+ movl %eax, dist_r /* dist = this */\r
+ shrl $16, dist_r /* dist = this.val */\r
+ movb %ah, %cl\r
+ subb %ah, bits_r /* bits -= this.bits */\r
+ shrl %cl, hold_r /* hold >>= this.bits */\r
+\r
+ /* if (op & 16) {\r
+ * dist = this.val\r
+ * op &= 15\r
+ * if (op > bits) {\r
+ * hold |= *((unsigned short *)in)++ << bits;\r
+ * bits += 16\r
+ * }\r
+ * dist += hold & mask[op];\r
+ * bits -= op;\r
+ * hold >>= op;\r
+ */\r
+ movb %al, %cl /* cl = this.op */\r
+\r
+ testb $16, %al /* if ((op & 16) == 0) */\r
+ jz .L_test_for_second_level_dist\r
+ andb $15, %cl /* op &= 15 */\r
+ jz .L_check_dist_one\r
+ cmpb %cl, bits_r\r
+ jae .L_add_bits_to_dist /* if (op <= bits) 97.6% */\r
+\r
+ movb %cl, %ch /* stash op in ch, freeing cl */\r
+ xorl %eax, %eax\r
+ lodsw /* al = *(ushort *)in++ */\r
+ movb bits_r, %cl /* cl = bits, needs it for shifting */\r
+ addb $16, bits_r /* bits += 16 */\r
+ shll %cl, %eax\r
+ orl %eax, hold_r /* hold |= *((ushort *)in)++ << bits */\r
+ movb %ch, %cl /* move op back to ecx */\r
+\r
+.L_add_bits_to_dist:\r
+ movl $1, %eax\r
+ shll %cl, %eax\r
+ decl %eax /* (1 << op) - 1 */\r
+ subb %cl, bits_r\r
+ andl hold_r, %eax /* eax &= hold */\r
+ shrl %cl, hold_r\r
+ addl %eax, dist_r /* dist += hold & ((1 << op) - 1) */\r
+ jmp .L_check_window\r
+\r
+#else /* USE_MMX */\r
+\r
+#define dist_r %ebx\r
+.L_dodist:\r
+ movzbl %ah, %ecx /* ecx = this.bits */\r
+ movl %eax, dist_r\r
+ shrl $16, dist_r /* dist = this.val */\r
+ subl %ecx, bits_r /* bits -= this.bits */\r
+ movd %ecx, used_mm\r
+\r
+ testb $16, %al /* if ((op & 16) == 0) */\r
+ jz .L_test_for_second_level_dist \r
+ andl $15, %eax /* op &= 15 */\r
+ jz .L_check_dist_one\r
+\r
+.L_add_bits_to_dist:\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+ movd %eax, used_mm /* save bit length of current op */\r
+ movd hold_mm, %ecx /* get the next bits on input stream */\r
+ subl %eax, bits_r /* bits -= op bits */\r
+ andl .L_mask(,%eax,4), %ecx /* ecx = hold & mask[op] */\r
+ addl %ecx, dist_r /* dist += hold & mask[op] */\r
+ jmp .L_check_window\r
+\r
+#endif\r
+\r
+.align 16,0x90\r
+\r
+.L_check_dist_one:\r
+ cmpl $1, dist_r\r
+ jne .L_check_window\r
+ cmpl out_r, beg(%esp)\r
+ je .L_check_window\r
+\r
+ decl out_r\r
+#if ! defined( USE_MMX )\r
+ movl len(%esp), %ecx\r
+#else\r
+ movl len_r, %ecx\r
+#endif\r
+ movb (out_r), %al\r
+ subl $3, %ecx\r
+\r
+ movb %al, 1(out_r)\r
+ movb %al, 2(out_r)\r
+ movb %al, 3(out_r)\r
+ addl $4, out_r\r
+ rep stosb\r
+\r
+#if defined( USE_MMX )\r
+ movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
+#endif\r
+ jmp .L_while_test\r
+\r
+.align 16,0x90\r
+\r
+.L_check_window:\r
+ /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ * %ecx = nbytes\r
+ *\r
+ * nbytes = out - beg;\r
+ * if (dist <= nbytes) {\r
+ * from = out - dist;\r
+ * do {\r
+ * PUP(out) = PUP(from);\r
+ * } while (--len > 0) {\r
+ * }\r
+ */\r
+\r
+ movl in_r, in(%esp) /* save in so from can use it's reg */\r
+ movl out_r, %eax\r
+ subl beg(%esp), %eax /* nbytes = out - beg */\r
+\r
+ cmpl dist_r, %eax\r
+ jb .L_clip_window /* if (dist > nbytes) 4.2% */\r
+\r
+#if ! defined( USE_MMX )\r
+ movl len(%esp), %ecx\r
+#else\r
+ movl len_r, %ecx\r
+#endif\r
+ movl out_r, from_r\r
+ subl dist_r, from_r /* from = out - dist */\r
+\r
+ subl $3, %ecx\r
+ movb (from_r), %al\r
+ movb %al, (out_r)\r
+ movb 1(from_r), %al\r
+ movb 2(from_r), %dl\r
+ addl $3, from_r\r
+ movb %al, 1(out_r)\r
+ movb %dl, 2(out_r)\r
+ addl $3, out_r\r
+ rep movsb\r
+\r
+ movl in(%esp), in_r /* move in back to %esi, toss from */\r
+#if defined( USE_MMX )\r
+ movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
+#endif\r
+ jmp .L_while_test\r
+\r
+.align 16,0x90\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+.L_test_for_second_level_length:\r
+ /* else if ((op & 64) == 0) {\r
+ * this = lcode[this.val + (hold & mask[op])];\r
+ * }\r
+ */\r
+ testb $64, %al\r
+ jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */\r
+\r
+ movl $1, %eax\r
+ shll %cl, %eax\r
+ decl %eax\r
+ andl hold_r, %eax /* eax &= hold */\r
+ addl %edx, %eax /* eax += this.val */\r
+ movl lcode(%esp), %edx /* edx = lcode */\r
+ movl (%edx,%eax,4), %eax /* eax = lcode[val + (hold&mask[op])] */\r
+ jmp .L_dolen\r
+\r
+#else /* USE_MMX */\r
+\r
+.L_test_for_second_level_length: \r
+ testb $64, %al\r
+ jnz .L_test_for_end_of_block /* if ((op & 64) != 0) */\r
+\r
+ andl $15, %eax\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+ movd hold_mm, %ecx\r
+ andl .L_mask(,%eax,4), %ecx\r
+ addl len_r, %ecx\r
+ movl (%ebx,%ecx,4), %eax /* eax = lcode[hold & lmask] */\r
+ jmp .L_dolen\r
+\r
+#endif\r
+\r
+.align 16,0x90\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+.L_test_for_second_level_dist:\r
+ /* else if ((op & 64) == 0) {\r
+ * this = dcode[this.val + (hold & mask[op])];\r
+ * }\r
+ */\r
+ testb $64, %al\r
+ jnz .L_invalid_distance_code /* if ((op & 64) != 0) */\r
+\r
+ movl $1, %eax\r
+ shll %cl, %eax\r
+ decl %eax\r
+ andl hold_r, %eax /* eax &= hold */\r
+ addl %edx, %eax /* eax += this.val */\r
+ movl dcode(%esp), %edx /* edx = dcode */\r
+ movl (%edx,%eax,4), %eax /* eax = dcode[val + (hold&mask[op])] */\r
+ jmp .L_dodist\r
+\r
+#else /* USE_MMX */\r
+\r
+.L_test_for_second_level_dist:\r
+ testb $64, %al\r
+ jnz .L_invalid_distance_code /* if ((op & 64) != 0) */\r
+\r
+ andl $15, %eax\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+ movd hold_mm, %ecx\r
+ andl .L_mask(,%eax,4), %ecx\r
+ movl dcode(%esp), %eax /* ecx = dcode */\r
+ addl dist_r, %ecx\r
+ movl (%eax,%ecx,4), %eax /* eax = lcode[hold & lmask] */\r
+ jmp .L_dodist\r
+\r
+#endif\r
+\r
+.align 16,0x90\r
+.L_clip_window:\r
+ /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ * %ecx = nbytes\r
+ *\r
+ * else {\r
+ * if (dist > wsize) {\r
+ * invalid distance\r
+ * }\r
+ * from = window;\r
+ * nbytes = dist - nbytes;\r
+ * if (write == 0) {\r
+ * from += wsize - nbytes;\r
+ */\r
+#define nbytes_r %ecx\r
+\r
+ movl %eax, nbytes_r\r
+ movl wsize(%esp), %eax /* prepare for dist compare */\r
+ negl nbytes_r /* nbytes = -nbytes */\r
+ movl window(%esp), from_r /* from = window */\r
+\r
+ cmpl dist_r, %eax\r
+ jb .L_invalid_distance_too_far /* if (dist > wsize) */\r
+\r
+ addl dist_r, nbytes_r /* nbytes = dist - nbytes */\r
+ cmpl $0, write(%esp)\r
+ jne .L_wrap_around_window /* if (write != 0) */\r
+\r
+ subl nbytes_r, %eax\r
+ addl %eax, from_r /* from += wsize - nbytes */\r
+\r
+ /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ * %ecx = nbytes, %eax = len\r
+ *\r
+ * if (nbytes < len) {\r
+ * len -= nbytes;\r
+ * do {\r
+ * PUP(out) = PUP(from);\r
+ * } while (--nbytes);\r
+ * from = out - dist;\r
+ * }\r
+ * }\r
+ */\r
+\r
+#if ! defined( USE_MMX )\r
+#define len_r %eax\r
+ movl len(%esp), len_r\r
+#endif\r
+ cmpl nbytes_r, len_r\r
+ jbe .L_do_copy1 /* if (nbytes >= len) */\r
+\r
+ subl nbytes_r, len_r /* len -= nbytes */\r
+ rep movsb\r
+ movl out_r, from_r\r
+ subl dist_r, from_r /* from = out - dist */\r
+ jmp .L_do_copy1\r
+\r
+ cmpl nbytes_r, len_r\r
+ jbe .L_do_copy1 /* if (nbytes >= len) */\r
+\r
+ subl nbytes_r, len_r /* len -= nbytes */\r
+ rep movsb\r
+ movl out_r, from_r\r
+ subl dist_r, from_r /* from = out - dist */\r
+ jmp .L_do_copy1\r
+\r
+.L_wrap_around_window:\r
+ /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ * %ecx = nbytes, %eax = write, %eax = len\r
+ *\r
+ * else if (write < nbytes) {\r
+ * from += wsize + write - nbytes;\r
+ * nbytes -= write;\r
+ * if (nbytes < len) {\r
+ * len -= nbytes;\r
+ * do {\r
+ * PUP(out) = PUP(from);\r
+ * } while (--nbytes);\r
+ * from = window;\r
+ * nbytes = write;\r
+ * if (nbytes < len) {\r
+ * len -= nbytes;\r
+ * do {\r
+ * PUP(out) = PUP(from);\r
+ * } while(--nbytes);\r
+ * from = out - dist;\r
+ * }\r
+ * }\r
+ * }\r
+ */\r
+#define write_r %eax\r
+\r
+ movl write(%esp), write_r\r
+ cmpl write_r, nbytes_r\r
+ jbe .L_contiguous_in_window /* if (write >= nbytes) */\r
+\r
+ addl wsize(%esp), from_r\r
+ addl write_r, from_r\r
+ subl nbytes_r, from_r /* from += wsize + write - nbytes */\r
+ subl write_r, nbytes_r /* nbytes -= write */\r
+#undef write_r\r
+\r
+#if ! defined( USE_MMX )\r
+ movl len(%esp), len_r\r
+#endif\r
+ cmpl nbytes_r, len_r\r
+ jbe .L_do_copy1 /* if (nbytes >= len) */\r
+\r
+ subl nbytes_r, len_r /* len -= nbytes */\r
+ rep movsb\r
+ movl window(%esp), from_r /* from = window */\r
+ movl write(%esp), nbytes_r /* nbytes = write */\r
+ cmpl nbytes_r, len_r\r
+ jbe .L_do_copy1 /* if (nbytes >= len) */\r
+\r
+ subl nbytes_r, len_r /* len -= nbytes */\r
+ rep movsb\r
+ movl out_r, from_r\r
+ subl dist_r, from_r /* from = out - dist */\r
+ jmp .L_do_copy1\r
+\r
+.L_contiguous_in_window:\r
+ /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist\r
+ * %ecx = nbytes, %eax = write, %eax = len\r
+ *\r
+ * else {\r
+ * from += write - nbytes;\r
+ * if (nbytes < len) {\r
+ * len -= nbytes;\r
+ * do {\r
+ * PUP(out) = PUP(from);\r
+ * } while (--nbytes);\r
+ * from = out - dist;\r
+ * }\r
+ * }\r
+ */\r
+#define write_r %eax\r
+\r
+ addl write_r, from_r\r
+ subl nbytes_r, from_r /* from += write - nbytes */\r
+#undef write_r\r
+\r
+#if ! defined( USE_MMX )\r
+ movl len(%esp), len_r\r
+#endif\r
+ cmpl nbytes_r, len_r\r
+ jbe .L_do_copy1 /* if (nbytes >= len) */\r
+\r
+ subl nbytes_r, len_r /* len -= nbytes */\r
+ rep movsb\r
+ movl out_r, from_r\r
+ subl dist_r, from_r /* from = out - dist */\r
+\r
+.L_do_copy1:\r
+ /* regs: %esi = from, %esi = in, %ebp = hold, %bl = bits, %edi = out\r
+ * %eax = len\r
+ *\r
+ * while (len > 0) {\r
+ * PUP(out) = PUP(from);\r
+ * len--;\r
+ * }\r
+ * }\r
+ * } while (in < last && out < end);\r
+ */\r
+#undef nbytes_r\r
+#define in_r %esi\r
+\r
+ movl len_r, %ecx\r
+ rep movsb\r
+\r
+ movl in(%esp), in_r /* move in back to %esi, toss from */\r
+#if defined( USE_MMX )\r
+ movl lcode(%esp), %ebx /* move lcode back to %ebx, toss dist */\r
+#endif\r
+ jmp .L_while_test\r
+\r
+#undef len_r\r
+#undef from_r\r
+#undef dist_r\r
+\r
+.L_invalid_distance_code:\r
+ /* else {\r
+ * strm->msg = "invalid distance code";\r
+ * state->mode = BAD;\r
+ * }\r
+ */\r
+ movl $.L_invalid_distance_code_msg, %ecx\r
+ movl $INFLATE_MODE_BAD, %edx\r
+ jmp .L_update_stream_state\r
+\r
+.L_test_for_end_of_block:\r
+ /* else if (op & 32) {\r
+ * state->mode = TYPE;\r
+ * break;\r
+ * }\r
+ */\r
+ testb $32, %al\r
+ jz .L_invalid_literal_length_code /* if ((op & 32) == 0) */\r
+\r
+ movl $0, %ecx\r
+ movl $INFLATE_MODE_TYPE, %edx\r
+ jmp .L_update_stream_state\r
+\r
+.L_invalid_literal_length_code:\r
+ /* else {\r
+ * strm->msg = "invalid literal/length code";\r
+ * state->mode = BAD;\r
+ * }\r
+ */\r
+ movl $.L_invalid_literal_length_code_msg, %ecx\r
+ movl $INFLATE_MODE_BAD, %edx\r
+ jmp .L_update_stream_state\r
+\r
+.L_invalid_distance_too_far:\r
+ /* strm->msg = "invalid distance too far back";\r
+ * state->mode = BAD;\r
+ */\r
+ movl in(%esp), in_r /* from_r has in's reg, put in back */\r
+ movl $.L_invalid_distance_too_far_msg, %ecx\r
+ movl $INFLATE_MODE_BAD, %edx\r
+ jmp .L_update_stream_state\r
+\r
+.L_update_stream_state:\r
+ /* set strm->msg = %ecx, strm->state->mode = %edx */\r
+ movl strm_sp(%esp), %eax\r
+ testl %ecx, %ecx /* if (msg != NULL) */\r
+ jz .L_skip_msg\r
+ movl %ecx, msg_strm(%eax) /* strm->msg = msg */\r
+.L_skip_msg:\r
+ movl state_strm(%eax), %eax /* state = strm->state */\r
+ movl %edx, mode_state(%eax) /* state->mode = edx (BAD | TYPE) */\r
+\r
+.L_break_loop:\r
+\r
+#define strm_r %eax\r
+#define state_r %edx\r
+\r
+ /* len = bits >> 3;\r
+ * in -= len;\r
+ * bits -= len << 3;\r
+ * hold &= (1U << bits) - 1;\r
+ * state->hold = hold;\r
+ * state->bits = bits;\r
+ * strm->next_in = in;\r
+ * strm->next_out = out;\r
+ */\r
+ movl strm_sp(%esp), strm_r\r
+ movl bitslong_r, %ecx\r
+ movl state_strm(strm_r), state_r\r
+ shrl $3, %ecx\r
+ subl %ecx, in_r\r
+ shll $3, %ecx\r
+ subl %ecx, bitslong_r\r
+ movl out_r, next_out_strm(strm_r)\r
+ movl in_r, next_in_strm(strm_r)\r
+ movl bitslong_r, bits_state(state_r)\r
+\r
+ movl bitslong_r, %ecx\r
+ movl $1, %ebx /* overwrites bitslong_r, %bl */\r
+ shll %cl, %ebx\r
+ decl %ebx\r
+\r
+#undef bits_r\r
+#undef bitslong_r\r
+\r
+#if ! defined( USE_MMX )\r
+\r
+ andl %ebx, hold_r\r
+ movl hold_r, hold_state(state_r)\r
+\r
+#else /* USE_MMX */\r
+\r
+ psrlq used_mm, hold_mm /* hold_mm >>= last bit length */\r
+ movd hold_mm, %ecx\r
+ andl %ebx, %ecx\r
+ movl %ecx, hold_state(state_r)\r
+\r
+#endif\r
+\r
+#define last_r %ebx\r
+\r
+ /* strm->avail_in = in < last ? 5 + (last - in) : 5 - (in - last) */\r
+ movl last(%esp), last_r\r
+ cmpl in_r, last_r\r
+ jbe .L_last_is_smaller /* if (in >= last) */\r
+\r
+ subl in_r, last_r /* last -= in */\r
+ addl $5, last_r /* last += 5 */\r
+ movl last_r, avail_in_strm(strm_r)\r
+ jmp .L_fixup_out\r
+.L_last_is_smaller:\r
+ subl last_r, in_r /* in -= last */\r
+ negl in_r /* in = -in */\r
+ addl $5, in_r /* in += 5 */\r
+ movl in_r, avail_in_strm(strm_r)\r
+\r
+#undef last_r\r
+#define end_r %ebx\r
+\r
+.L_fixup_out:\r
+ /* strm->avail_out = out < end ? 257 + (end - out) : 257 - (out - end)*/\r
+ movl end(%esp), end_r\r
+ cmpl out_r, end_r\r
+ jbe .L_end_is_smaller /* if (out >= end) */\r
+\r
+ subl out_r, end_r /* end -= out */\r
+ addl $257, end_r /* end += 257 */\r
+ movl end_r, avail_out_strm(strm_r)\r
+ jmp .L_done\r
+.L_end_is_smaller:\r
+ subl end_r, out_r /* out -= end */\r
+ negl out_r /* out = -out */\r
+ addl $257, out_r /* out += 257 */\r
+ movl out_r, avail_out_strm(strm_r)\r
+\r
+#undef end_r\r
+\r
+.L_done:\r
+#if defined( USE_MMX )\r
+ emms\r
+#endif\r
+ addl $local_var_size, %esp\r
+ popf\r
+ popl %ebx\r
+ popl %ebp\r
+ popl %esi\r
+ popl %edi\r
+ ret\r
+\r
+.type inflate_fast,@function\r
+.size inflate_fast,.-inflate_fast\r
--- /dev/null
+puff: puff.c puff.h
+ cc -DTEST -o puff puff.c
+
+test: puff
+ puff zeros.raw
+
+clean:
+ rm -f puff puff.o
--- /dev/null
+Puff -- A Simple Inflate
+3 Mar 2003
+Mark Adler
+madler@alumni.caltech.edu
+
+What this is --
+
+puff.c provides the routine puff() to decompress the deflate data format. It
+does so more slowly than zlib, but the code is about one-fifth the size of the
+inflate code in zlib, and written to be very easy to read.
+
+Why I wrote this --
+
+puff.c was written to document the deflate format unambiguously, by virtue of
+being working C code. It is meant to supplement RFC 1951, which formally
+describes the deflate format. I have received many questions on details of the
+deflate format, and I hope that reading this code will answer those questions.
+puff.c is heavily commented with details of the deflate format, especially
+those little nooks and cranies of the format that might not be obvious from a
+specification.
+
+puff.c may also be useful in applications where code size or memory usage is a
+very limited resource, and speed is not as important.
+
+How to use it --
+
+Well, most likely you should just be reading puff.c and using zlib for actual
+applications, but if you must ...
+
+Include puff.h in your code, which provides this prototype:
+
+int puff(unsigned char *dest, /* pointer to destination pointer */
+ unsigned long *destlen, /* amount of output space */
+ unsigned char *source, /* pointer to source data pointer */
+ unsigned long *sourcelen); /* amount of input available */
+
+Then you can call puff() to decompress a deflate stream that is in memory in
+its entirety at source, to a sufficiently sized block of memory for the
+decompressed data at dest. puff() is the only external symbol in puff.c The
+only C library functions that puff.c needs are setjmp() and longjmp(), which
+are used to simplify error checking in the code to improve readabilty. puff.c
+does no memory allocation, and uses less than 2K bytes off of the stack.
+
+If destlen is not enough space for the uncompressed data, then inflate will
+return an error without writing more than destlen bytes. Note that this means
+that in order to decompress the deflate data successfully, you need to know
+the size of the uncompressed data ahead of time.
+
+If needed, puff() can determine the size of the uncompressed data with no
+output space. This is done by passing dest equal to (unsigned char *)0. Then
+the initial value of *destlen is ignored and *destlen is set to the length of
+the uncompressed data. So if the size of the uncompressed data is not known,
+then two passes of puff() can be used--first to determine the size, and second
+to do the actual inflation after allocating the appropriate memory. Not
+pretty, but it works. (This is one of the reasons you should be using zlib.)
+
+The deflate format is self-terminating. If the deflate stream does not end
+in *sourcelen bytes, puff() will return an error without reading at or past
+endsource.
+
+On return, *sourcelen is updated to the amount of input data consumed, and
+*destlen is updated to the size of the uncompressed data. See the comments
+in puff.c for the possible return codes for puff().
--- /dev/null
+/*
+ * puff.c
+ * Copyright (C) 2002, 2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in puff.h
+ * version 1.7, 3 Mar 2003
+ *
+ * puff.c is a simple inflate written to be an unambiguous way to specify the
+ * deflate format. It is not written for speed but rather simplicity. As a
+ * side benefit, this code might actually be useful when small code is more
+ * important than speed, such as bootstrap applications. For typical deflate
+ * data, zlib's inflate() is about four times as fast as puff(). zlib's
+ * inflate compiles to around 20K on my machine, whereas puff.c compiles to
+ * around 4K on my machine (a PowerPC using GNU cc). If the faster decode()
+ * function here is used, then puff() is only twice as slow as zlib's
+ * inflate().
+ *
+ * All dynamically allocated memory comes from the stack. The stack required
+ * is less than 2K bytes. This code is compatible with 16-bit int's and
+ * assumes that long's are at least 32 bits. puff.c uses the short data type,
+ * assumed to be 16 bits, for arrays in order to to conserve memory. The code
+ * works whether integers are stored big endian or little endian.
+ *
+ * In the comments below are "Format notes" that describe the inflate process
+ * and document some of the less obvious aspects of the format. This source
+ * code is meant to supplement RFC 1951, which formally describes the deflate
+ * format:
+ *
+ * http://www.zlib.org/rfc-deflate.html
+ */
+
+/*
+ * Change history:
+ *
+ * 1.0 10 Feb 2002 - First version
+ * 1.1 17 Feb 2002 - Clarifications of some comments and notes
+ * - Update puff() dest and source pointers on negative
+ * errors to facilitate debugging deflators
+ * - Remove longest from struct huffman -- not needed
+ * - Simplify offs[] index in construct()
+ * - Add input size and checking, using longjmp() to
+ * maintain easy readability
+ * - Use short data type for large arrays
+ * - Use pointers instead of long to specify source and
+ * destination sizes to avoid arbitrary 4 GB limits
+ * 1.2 17 Mar 2002 - Add faster version of decode(), doubles speed (!),
+ * but leave simple version for readabilty
+ * - Make sure invalid distances detected if pointers
+ * are 16 bits
+ * - Fix fixed codes table error
+ * - Provide a scanning mode for determining size of
+ * uncompressed data
+ * 1.3 20 Mar 2002 - Go back to lengths for puff() parameters [Jean-loup]
+ * - Add a puff.h file for the interface
+ * - Add braces in puff() for else do [Jean-loup]
+ * - Use indexes instead of pointers for readability
+ * 1.4 31 Mar 2002 - Simplify construct() code set check
+ * - Fix some comments
+ * - Add FIXLCODES #define
+ * 1.5 6 Apr 2002 - Minor comment fixes
+ * 1.6 7 Aug 2002 - Minor format changes
+ * 1.7 3 Mar 2002 - Added test code for distribution
+ * - Added zlib-like license
+ */
+
+#include <setjmp.h> /* for setjmp(), longjmp(), and jmp_buf */
+#include "puff.h" /* prototype for puff() */
+
+#define local static /* for local function definitions */
+#define NIL ((unsigned char *)0) /* for no output option */
+
+/*
+ * Maximums for allocations and loops. It is not useful to change these --
+ * they are fixed by the deflate format.
+ */
+#define MAXBITS 15 /* maximum bits in a code */
+#define MAXLCODES 286 /* maximum number of literal/length codes */
+#define MAXDCODES 30 /* maximum number of distance codes */
+#define MAXCODES (MAXLCODES+MAXDCODES) /* maximum codes lengths to read */
+#define FIXLCODES 288 /* number of fixed literal/length codes */
+
+/* input and output state */
+struct state {
+ /* output state */
+ unsigned char *out; /* output buffer */
+ unsigned long outlen; /* available space at out */
+ unsigned long outcnt; /* bytes written to out so far */
+
+ /* input state */
+ unsigned char *in; /* input buffer */
+ unsigned long inlen; /* available input at in */
+ unsigned long incnt; /* bytes read so far */
+ int bitbuf; /* bit buffer */
+ int bitcnt; /* number of bits in bit buffer */
+
+ /* input limit error return state for bits() and decode() */
+ jmp_buf env;
+};
+
+/*
+ * Return need bits from the input stream. This always leaves less than
+ * eight bits in the buffer. bits() works properly for need == 0.
+ *
+ * Format notes:
+ *
+ * - Bits are stored in bytes from the least significant bit to the most
+ * significant bit. Therefore bits are dropped from the bottom of the bit
+ * buffer, using shift right, and new bytes are appended to the top of the
+ * bit buffer, using shift left.
+ */
+local int bits(struct state *s, int need)
+{
+ long val; /* bit accumulator (can use up to 20 bits) */
+
+ /* load at least need bits into val */
+ val = s->bitbuf;
+ while (s->bitcnt < need) {
+ if (s->incnt == s->inlen) longjmp(s->env, 1); /* out of input */
+ val |= (long)(s->in[s->incnt++]) << s->bitcnt; /* load eight bits */
+ s->bitcnt += 8;
+ }
+
+ /* drop need bits and update buffer, always zero to seven bits left */
+ s->bitbuf = (int)(val >> need);
+ s->bitcnt -= need;
+
+ /* return need bits, zeroing the bits above that */
+ return (int)(val & ((1L << need) - 1));
+}
+
+/*
+ * Process a stored block.
+ *
+ * Format notes:
+ *
+ * - After the two-bit stored block type (00), the stored block length and
+ * stored bytes are byte-aligned for fast copying. Therefore any leftover
+ * bits in the byte that has the last bit of the type, as many as seven, are
+ * discarded. The value of the discarded bits are not defined and should not
+ * be checked against any expectation.
+ *
+ * - The second inverted copy of the stored block length does not have to be
+ * checked, but it's probably a good idea to do so anyway.
+ *
+ * - A stored block can have zero length. This is sometimes used to byte-align
+ * subsets of the compressed data for random access or partial recovery.
+ */
+local int stored(struct state *s)
+{
+ unsigned len; /* length of stored block */
+
+ /* discard leftover bits from current byte (assumes s->bitcnt < 8) */
+ s->bitbuf = 0;
+ s->bitcnt = 0;
+
+ /* get length and check against its one's complement */
+ if (s->incnt + 4 > s->inlen) return 2; /* not enough input */
+ len = s->in[s->incnt++];
+ len |= s->in[s->incnt++] << 8;
+ if (s->in[s->incnt++] != (~len & 0xff) ||
+ s->in[s->incnt++] != ((~len >> 8) & 0xff))
+ return -2; /* didn't match complement! */
+
+ /* copy len bytes from in to out */
+ if (s->incnt + len > s->inlen) return 2; /* not enough input */
+ if (s->out != NIL) {
+ if (s->outcnt + len > s->outlen)
+ return 1; /* not enough output space */
+ while (len--)
+ s->out[s->outcnt++] = s->in[s->incnt++];
+ }
+ else { /* just scanning */
+ s->outcnt += len;
+ s->incnt += len;
+ }
+
+ /* done with a valid stored block */
+ return 0;
+}
+
+/*
+ * Huffman code decoding tables. count[1..MAXBITS] is the number of symbols of
+ * each length, which for a canonical code are stepped through in order.
+ * symbol[] are the symbol values in canonical order, where the number of
+ * entries is the sum of the counts in count[]. The decoding process can be
+ * seen in the function decode() below.
+ */
+struct huffman {
+ short *count; /* number of symbols of each length */
+ short *symbol; /* canonically ordered symbols */
+};
+
+/*
+ * Decode a code from the stream s using huffman table h. Return the symbol or
+ * a negative value if there is an error. If all of the lengths are zero, i.e.
+ * an empty code, or if the code is incomplete and an invalid code is received,
+ * then -9 is returned after reading MAXBITS bits.
+ *
+ * Format notes:
+ *
+ * - The codes as stored in the compressed data are bit-reversed relative to
+ * a simple integer ordering of codes of the same lengths. Hence below the
+ * bits are pulled from the compressed data one at a time and used to
+ * build the code value reversed from what is in the stream in order to
+ * permit simple integer comparisons for decoding. A table-based decoding
+ * scheme (as used in zlib) does not need to do this reversal.
+ *
+ * - The first code for the shortest length is all zeros. Subsequent codes of
+ * the same length are simply integer increments of the previous code. When
+ * moving up a length, a zero bit is appended to the code. For a complete
+ * code, the last code of the longest length will be all ones.
+ *
+ * - Incomplete codes are handled by this decoder, since they are permitted
+ * in the deflate format. See the format notes for fixed() and dynamic().
+ */
+#ifdef SLOW
+local int decode(struct state *s, struct huffman *h)
+{
+ int len; /* current number of bits in code */
+ int code; /* len bits being decoded */
+ int first; /* first code of length len */
+ int count; /* number of codes of length len */
+ int index; /* index of first code of length len in symbol table */
+
+ code = first = index = 0;
+ for (len = 1; len <= MAXBITS; len++) {
+ code |= bits(s, 1); /* get next bit */
+ count = h->count[len];
+ if (code < first + count) /* if length len, return symbol */
+ return h->symbol[index + (code - first)];
+ index += count; /* else update for next length */
+ first += count;
+ first <<= 1;
+ code <<= 1;
+ }
+ return -9; /* ran out of codes */
+}
+
+/*
+ * A faster version of decode() for real applications of this code. It's not
+ * as readable, but it makes puff() twice as fast. And it only makes the code
+ * a few percent larger.
+ */
+#else /* !SLOW */
+local int decode(struct state *s, struct huffman *h)
+{
+ int len; /* current number of bits in code */
+ int code; /* len bits being decoded */
+ int first; /* first code of length len */
+ int count; /* number of codes of length len */
+ int index; /* index of first code of length len in symbol table */
+ int bitbuf; /* bits from stream */
+ int left; /* bits left in next or left to process */
+ short *next; /* next number of codes */
+
+ bitbuf = s->bitbuf;
+ left = s->bitcnt;
+ code = first = index = 0;
+ len = 1;
+ next = h->count + 1;
+ while (1) {
+ while (left--) {
+ code |= bitbuf & 1;
+ bitbuf >>= 1;
+ count = *next++;
+ if (code < first + count) { /* if length len, return symbol */
+ s->bitbuf = bitbuf;
+ s->bitcnt = (s->bitcnt - len) & 7;
+ return h->symbol[index + (code - first)];
+ }
+ index += count; /* else update for next length */
+ first += count;
+ first <<= 1;
+ code <<= 1;
+ len++;
+ }
+ left = (MAXBITS+1) - len;
+ if (left == 0) break;
+ if (s->incnt == s->inlen) longjmp(s->env, 1); /* out of input */
+ bitbuf = s->in[s->incnt++];
+ if (left > 8) left = 8;
+ }
+ return -9; /* ran out of codes */
+}
+#endif /* SLOW */
+
+/*
+ * Given the list of code lengths length[0..n-1] representing a canonical
+ * Huffman code for n symbols, construct the tables required to decode those
+ * codes. Those tables are the number of codes of each length, and the symbols
+ * sorted by length, retaining their original order within each length. The
+ * return value is zero for a complete code set, negative for an over-
+ * subscribed code set, and positive for an incomplete code set. The tables
+ * can be used if the return value is zero or positive, but they cannot be used
+ * if the return value is negative. If the return value is zero, it is not
+ * possible for decode() using that table to return an error--any stream of
+ * enough bits will resolve to a symbol. If the return value is positive, then
+ * it is possible for decode() using that table to return an error for received
+ * codes past the end of the incomplete lengths.
+ *
+ * Not used by decode(), but used for error checking, h->count[0] is the number
+ * of the n symbols not in the code. So n - h->count[0] is the number of
+ * codes. This is useful for checking for incomplete codes that have more than
+ * one symbol, which is an error in a dynamic block.
+ *
+ * Assumption: for all i in 0..n-1, 0 <= length[i] <= MAXBITS
+ * This is assured by the construction of the length arrays in dynamic() and
+ * fixed() and is not verified by construct().
+ *
+ * Format notes:
+ *
+ * - Permitted and expected examples of incomplete codes are one of the fixed
+ * codes and any code with a single symbol which in deflate is coded as one
+ * bit instead of zero bits. See the format notes for fixed() and dynamic().
+ *
+ * - Within a given code length, the symbols are kept in ascending order for
+ * the code bits definition.
+ */
+local int construct(struct huffman *h, short *length, int n)
+{
+ int symbol; /* current symbol when stepping through length[] */
+ int len; /* current length when stepping through h->count[] */
+ int left; /* number of possible codes left of current length */
+ short offs[MAXBITS+1]; /* offsets in symbol table for each length */
+
+ /* count number of codes of each length */
+ for (len = 0; len <= MAXBITS; len++)
+ h->count[len] = 0;
+ for (symbol = 0; symbol < n; symbol++)
+ (h->count[length[symbol]])++; /* assumes lengths are within bounds */
+ if (h->count[0] == n) /* no codes! */
+ return 0; /* complete, but decode() will fail */
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1; /* one possible code of zero length */
+ for (len = 1; len <= MAXBITS; len++) {
+ left <<= 1; /* one more bit, double codes left */
+ left -= h->count[len]; /* deduct count from possible codes */
+ if (left < 0) return left; /* over-subscribed--return negative */
+ } /* left > 0 means incomplete */
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++)
+ offs[len + 1] = offs[len] + h->count[len];
+
+ /*
+ * put symbols in table sorted by length, by symbol order within each
+ * length
+ */
+ for (symbol = 0; symbol < n; symbol++)
+ if (length[symbol] != 0)
+ h->symbol[offs[length[symbol]]++] = symbol;
+
+ /* return zero for complete set, positive for incomplete set */
+ return left;
+}
+
+/*
+ * Decode literal/length and distance codes until an end-of-block code.
+ *
+ * Format notes:
+ *
+ * - Compressed data that is after the block type if fixed or after the code
+ * description if dynamic is a combination of literals and length/distance
+ * pairs terminated by and end-of-block code. Literals are simply Huffman
+ * coded bytes. A length/distance pair is a coded length followed by a
+ * coded distance to represent a string that occurs earlier in the
+ * uncompressed data that occurs again at the current location.
+ *
+ * - Literals, lengths, and the end-of-block code are combined into a single
+ * code of up to 286 symbols. They are 256 literals (0..255), 29 length
+ * symbols (257..285), and the end-of-block symbol (256).
+ *
+ * - There are 256 possible lengths (3..258), and so 29 symbols are not enough
+ * to represent all of those. Lengths 3..10 and 258 are in fact represented
+ * by just a length symbol. Lengths 11..257 are represented as a symbol and
+ * some number of extra bits that are added as an integer to the base length
+ * of the length symbol. The number of extra bits is determined by the base
+ * length symbol. These are in the static arrays below, lens[] for the base
+ * lengths and lext[] for the corresponding number of extra bits.
+ *
+ * - The reason that 258 gets its own symbol is that the longest length is used
+ * often in highly redundant files. Note that 258 can also be coded as the
+ * base value 227 plus the maximum extra value of 31. While a good deflate
+ * should never do this, it is not an error, and should be decoded properly.
+ *
+ * - If a length is decoded, including its extra bits if any, then it is
+ * followed a distance code. There are up to 30 distance symbols. Again
+ * there are many more possible distances (1..32768), so extra bits are added
+ * to a base value represented by the symbol. The distances 1..4 get their
+ * own symbol, but the rest require extra bits. The base distances and
+ * corresponding number of extra bits are below in the static arrays dist[]
+ * and dext[].
+ *
+ * - Literal bytes are simply written to the output. A length/distance pair is
+ * an instruction to copy previously uncompressed bytes to the output. The
+ * copy is from distance bytes back in the output stream, copying for length
+ * bytes.
+ *
+ * - Distances pointing before the beginning of the output data are not
+ * permitted.
+ *
+ * - Overlapped copies, where the length is greater than the distance, are
+ * allowed and common. For example, a distance of one and a length of 258
+ * simply copies the last byte 258 times. A distance of four and a length of
+ * twelve copies the last four bytes three times. A simple forward copy
+ * ignoring whether the length is greater than the distance or not implements
+ * this correctly. You should not use memcpy() since its behavior is not
+ * defined for overlapped arrays. You should not use memmove() or bcopy()
+ * since though their behavior -is- defined for overlapping arrays, it is
+ * defined to do the wrong thing in this case.
+ */
+local int codes(struct state *s,
+ struct huffman *lencode,
+ struct huffman *distcode)
+{
+ int symbol; /* decoded symbol */
+ int len; /* length for copy */
+ unsigned dist; /* distance for copy */
+ static const short lens[29] = { /* Size base for length codes 257..285 */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258};
+ static const short lext[29] = { /* Extra bits for length codes 257..285 */
+ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
+ 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
+ static const short dists[30] = { /* Offset base for distance codes 0..29 */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577};
+ static const short dext[30] = { /* Extra bits for distance codes 0..29 */
+ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+ 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+ 12, 12, 13, 13};
+
+ /* decode literals and length/distance pairs */
+ do {
+ symbol = decode(s, lencode);
+ if (symbol < 0) return symbol; /* invalid symbol */
+ if (symbol < 256) { /* literal: symbol is the byte */
+ /* write out the literal */
+ if (s->out != NIL) {
+ if (s->outcnt == s->outlen) return 1;
+ s->out[s->outcnt] = symbol;
+ }
+ s->outcnt++;
+ }
+ else if (symbol > 256) { /* length */
+ /* get and compute length */
+ symbol -= 257;
+ if (symbol >= 29) return -9; /* invalid fixed code */
+ len = lens[symbol] + bits(s, lext[symbol]);
+
+ /* get and check distance */
+ symbol = decode(s, distcode);
+ if (symbol < 0) return symbol; /* invalid symbol */
+ dist = dists[symbol] + bits(s, dext[symbol]);
+ if (dist > s->outcnt)
+ return -10; /* distance too far back */
+
+ /* copy length bytes from distance bytes back */
+ if (s->out != NIL) {
+ if (s->outcnt + len > s->outlen) return 1;
+ while (len--) {
+ s->out[s->outcnt] = s->out[s->outcnt - dist];
+ s->outcnt++;
+ }
+ }
+ else
+ s->outcnt += len;
+ }
+ } while (symbol != 256); /* end of block symbol */
+
+ /* done with a valid fixed or dynamic block */
+ return 0;
+}
+
+/*
+ * Process a fixed codes block.
+ *
+ * Format notes:
+ *
+ * - This block type can be useful for compressing small amounts of data for
+ * which the size of the code descriptions in a dynamic block exceeds the
+ * benefit of custom codes for that block. For fixed codes, no bits are
+ * spent on code descriptions. Instead the code lengths for literal/length
+ * codes and distance codes are fixed. The specific lengths for each symbol
+ * can be seen in the "for" loops below.
+ *
+ * - The literal/length code is complete, but has two symbols that are invalid
+ * and should result in an error if received. This cannot be implemented
+ * simply as an incomplete code since those two symbols are in the "middle"
+ * of the code. They are eight bits long and the longest literal/length\
+ * code is nine bits. Therefore the code must be constructed with those
+ * symbols, and the invalid symbols must be detected after decoding.
+ *
+ * - The fixed distance codes also have two invalid symbols that should result
+ * in an error if received. Since all of the distance codes are the same
+ * length, this can be implemented as an incomplete code. Then the invalid
+ * codes are detected while decoding.
+ */
+local int fixed(struct state *s)
+{
+ static int virgin = 1;
+ static short lencnt[MAXBITS+1], lensym[FIXLCODES];
+ static short distcnt[MAXBITS+1], distsym[MAXDCODES];
+ static struct huffman lencode = {lencnt, lensym};
+ static struct huffman distcode = {distcnt, distsym};
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ int symbol;
+ short lengths[FIXLCODES];
+
+ /* literal/length table */
+ for (symbol = 0; symbol < 144; symbol++)
+ lengths[symbol] = 8;
+ for (; symbol < 256; symbol++)
+ lengths[symbol] = 9;
+ for (; symbol < 280; symbol++)
+ lengths[symbol] = 7;
+ for (; symbol < FIXLCODES; symbol++)
+ lengths[symbol] = 8;
+ construct(&lencode, lengths, FIXLCODES);
+
+ /* distance table */
+ for (symbol = 0; symbol < MAXDCODES; symbol++)
+ lengths[symbol] = 5;
+ construct(&distcode, lengths, MAXDCODES);
+
+ /* do this just once */
+ virgin = 0;
+ }
+
+ /* decode data until end-of-block code */
+ return codes(s, &lencode, &distcode);
+}
+
+/*
+ * Process a dynamic codes block.
+ *
+ * Format notes:
+ *
+ * - A dynamic block starts with a description of the literal/length and
+ * distance codes for that block. New dynamic blocks allow the compressor to
+ * rapidly adapt to changing data with new codes optimized for that data.
+ *
+ * - The codes used by the deflate format are "canonical", which means that
+ * the actual bits of the codes are generated in an unambiguous way simply
+ * from the number of bits in each code. Therefore the code descriptions
+ * are simply a list of code lengths for each symbol.
+ *
+ * - The code lengths are stored in order for the symbols, so lengths are
+ * provided for each of the literal/length symbols, and for each of the
+ * distance symbols.
+ *
+ * - If a symbol is not used in the block, this is represented by a zero as
+ * as the code length. This does not mean a zero-length code, but rather
+ * that no code should be created for this symbol. There is no way in the
+ * deflate format to represent a zero-length code.
+ *
+ * - The maximum number of bits in a code is 15, so the possible lengths for
+ * any code are 1..15.
+ *
+ * - The fact that a length of zero is not permitted for a code has an
+ * interesting consequence. Normally if only one symbol is used for a given
+ * code, then in fact that code could be represented with zero bits. However
+ * in deflate, that code has to be at least one bit. So for example, if
+ * only a single distance base symbol appears in a block, then it will be
+ * represented by a single code of length one, in particular one 0 bit. This
+ * is an incomplete code, since if a 1 bit is received, it has no meaning,
+ * and should result in an error. So incomplete distance codes of one symbol
+ * should be permitted, and the receipt of invalid codes should be handled.
+ *
+ * - It is also possible to have a single literal/length code, but that code
+ * must be the end-of-block code, since every dynamic block has one. This
+ * is not the most efficient way to create an empty block (an empty fixed
+ * block is fewer bits), but it is allowed by the format. So incomplete
+ * literal/length codes of one symbol should also be permitted.
+ *
+ * - The list of up to 286 length/literal lengths and up to 30 distance lengths
+ * are themselves compressed using Huffman codes and run-length encoding. In
+ * the list of code lengths, a 0 symbol means no code, a 1..15 symbol means
+ * that length, and the symbols 16, 17, and 18 are run-length instructions.
+ * Each of 16, 17, and 18 are follwed by extra bits to define the length of
+ * the run. 16 copies the last length 3 to 6 times. 17 represents 3 to 10
+ * zero lengths, and 18 represents 11 to 138 zero lengths. Unused symbols
+ * are common, hence the special coding for zero lengths.
+ *
+ * - The symbols for 0..18 are Huffman coded, and so that code must be
+ * described first. This is simply a sequence of up to 19 three-bit values
+ * representing no code (0) or the code length for that symbol (1..7).
+ *
+ * - A dynamic block starts with three fixed-size counts from which is computed
+ * the number of literal/length code lengths, the number of distance code
+ * lengths, and the number of code length code lengths (ok, you come up with
+ * a better name!) in the code descriptions. For the literal/length and
+ * distance codes, lengths after those provided are considered zero, i.e. no
+ * code. The code length code lengths are received in a permuted order (see
+ * the order[] array below) to make a short code length code length list more
+ * likely. As it turns out, very short and very long codes are less likely
+ * to be seen in a dynamic code description, hence what may appear initially
+ * to be a peculiar ordering.
+ *
+ * - Given the number of literal/length code lengths (nlen) and distance code
+ * lengths (ndist), then they are treated as one long list of nlen + ndist
+ * code lengths. Therefore run-length coding can and often does cross the
+ * boundary between the two sets of lengths.
+ *
+ * - So to summarize, the code description at the start of a dynamic block is
+ * three counts for the number of code lengths for the literal/length codes,
+ * the distance codes, and the code length codes. This is followed by the
+ * code length code lengths, three bits each. This is used to construct the
+ * code length code which is used to read the remainder of the lengths. Then
+ * the literal/length code lengths and distance lengths are read as a single
+ * set of lengths using the code length codes. Codes are constructed from
+ * the resulting two sets of lengths, and then finally you can start
+ * decoding actual compressed data in the block.
+ *
+ * - For reference, a "typical" size for the code description in a dynamic
+ * block is around 80 bytes.
+ */
+local int dynamic(struct state *s)
+{
+ int nlen, ndist, ncode; /* number of lengths in descriptor */
+ int index; /* index of lengths[] */
+ int err; /* construct() return value */
+ short lengths[MAXCODES]; /* descriptor code lengths */
+ short lencnt[MAXBITS+1], lensym[MAXLCODES]; /* lencode memory */
+ short distcnt[MAXBITS+1], distsym[MAXDCODES]; /* distcode memory */
+ struct huffman lencode = {lencnt, lensym}; /* length code */
+ struct huffman distcode = {distcnt, distsym}; /* distance code */
+ static const short order[19] = /* permutation of code length codes */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+ /* get number of lengths in each table, check lengths */
+ nlen = bits(s, 5) + 257;
+ ndist = bits(s, 5) + 1;
+ ncode = bits(s, 4) + 4;
+ if (nlen > MAXLCODES || ndist > MAXDCODES)
+ return -3; /* bad counts */
+
+ /* read code length code lengths (really), missing lengths are zero */
+ for (index = 0; index < ncode; index++)
+ lengths[order[index]] = bits(s, 3);
+ for (; index < 19; index++)
+ lengths[order[index]] = 0;
+
+ /* build huffman table for code lengths codes (use lencode temporarily) */
+ err = construct(&lencode, lengths, 19);
+ if (err != 0) return -4; /* require complete code set here */
+
+ /* read length/literal and distance code length tables */
+ index = 0;
+ while (index < nlen + ndist) {
+ int symbol; /* decoded value */
+ int len; /* last length to repeat */
+
+ symbol = decode(s, &lencode);
+ if (symbol < 16) /* length in 0..15 */
+ lengths[index++] = symbol;
+ else { /* repeat instruction */
+ len = 0; /* assume repeating zeros */
+ if (symbol == 16) { /* repeat last length 3..6 times */
+ if (index == 0) return -5; /* no last length! */
+ len = lengths[index - 1]; /* last length */
+ symbol = 3 + bits(s, 2);
+ }
+ else if (symbol == 17) /* repeat zero 3..10 times */
+ symbol = 3 + bits(s, 3);
+ else /* == 18, repeat zero 11..138 times */
+ symbol = 11 + bits(s, 7);
+ if (index + symbol > nlen + ndist)
+ return -6; /* too many lengths! */
+ while (symbol--) /* repeat last or zero symbol times */
+ lengths[index++] = len;
+ }
+ }
+
+ /* build huffman table for literal/length codes */
+ err = construct(&lencode, lengths, nlen);
+ if (err < 0 || (err > 0 && nlen - lencode.count[0] != 1))
+ return -7; /* only allow incomplete codes if just one code */
+
+ /* build huffman table for distance codes */
+ err = construct(&distcode, lengths + nlen, ndist);
+ if (err < 0 || (err > 0 && ndist - distcode.count[0] != 1))
+ return -8; /* only allow incomplete codes if just one code */
+
+ /* decode data until end-of-block code */
+ return codes(s, &lencode, &distcode);
+}
+
+/*
+ * Inflate source to dest. On return, destlen and sourcelen are updated to the
+ * size of the uncompressed data and the size of the deflate data respectively.
+ * On success, the return value of puff() is zero. If there is an error in the
+ * source data, i.e. it is not in the deflate format, then a negative value is
+ * returned. If there is not enough input available or there is not enough
+ * output space, then a positive error is returned. In that case, destlen and
+ * sourcelen are not updated to facilitate retrying from the beginning with the
+ * provision of more input data or more output space. In the case of invalid
+ * inflate data (a negative error), the dest and source pointers are updated to
+ * facilitate the debugging of deflators.
+ *
+ * puff() also has a mode to determine the size of the uncompressed output with
+ * no output written. For this dest must be (unsigned char *)0. In this case,
+ * the input value of *destlen is ignored, and on return *destlen is set to the
+ * size of the uncompressed output.
+ *
+ * The return codes are:
+ *
+ * 2: available inflate data did not terminate
+ * 1: output space exhausted before completing inflate
+ * 0: successful inflate
+ * -1: invalid block type (type == 3)
+ * -2: stored block length did not match one's complement
+ * -3: dynamic block code description: too many length or distance codes
+ * -4: dynamic block code description: code lengths codes incomplete
+ * -5: dynamic block code description: repeat lengths with no first length
+ * -6: dynamic block code description: repeat more than specified lengths
+ * -7: dynamic block code description: invalid literal/length code lengths
+ * -8: dynamic block code description: invalid distance code lengths
+ * -9: invalid literal/length or distance code in fixed or dynamic block
+ * -10: distance is too far back in fixed or dynamic block
+ *
+ * Format notes:
+ *
+ * - Three bits are read for each block to determine the kind of block and
+ * whether or not it is the last block. Then the block is decoded and the
+ * process repeated if it was not the last block.
+ *
+ * - The leftover bits in the last byte of the deflate data after the last
+ * block (if it was a fixed or dynamic block) are undefined and have no
+ * expected values to check.
+ */
+int puff(unsigned char *dest, /* pointer to destination pointer */
+ unsigned long *destlen, /* amount of output space */
+ unsigned char *source, /* pointer to source data pointer */
+ unsigned long *sourcelen) /* amount of input available */
+{
+ struct state s; /* input/output state */
+ int last, type; /* block information */
+ int err; /* return value */
+
+ /* initialize output state */
+ s.out = dest;
+ s.outlen = *destlen; /* ignored if dest is NIL */
+ s.outcnt = 0;
+
+ /* initialize input state */
+ s.in = source;
+ s.inlen = *sourcelen;
+ s.incnt = 0;
+ s.bitbuf = 0;
+ s.bitcnt = 0;
+
+ /* return if bits() or decode() tries to read past available input */
+ if (setjmp(s.env) != 0) /* if came back here via longjmp() */
+ err = 2; /* then skip do-loop, return error */
+ else {
+ /* process blocks until last block or error */
+ do {
+ last = bits(&s, 1); /* one if last block */
+ type = bits(&s, 2); /* block type 0..3 */
+ err = type == 0 ? stored(&s) :
+ (type == 1 ? fixed(&s) :
+ (type == 2 ? dynamic(&s) :
+ -1)); /* type == 3, invalid */
+ if (err != 0) break; /* return with error */
+ } while (!last);
+ }
+
+ /* update the lengths and return */
+ if (err <= 0) {
+ *destlen = s.outcnt;
+ *sourcelen = s.incnt;
+ }
+ return err;
+}
+
+#ifdef TEST
+/* Example of how to use puff() */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+local unsigned char *yank(char *name, unsigned long *len)
+{
+ unsigned long size;
+ unsigned char *buf;
+ FILE *in;
+ struct stat s;
+
+ *len = 0;
+ if (stat(name, &s)) return NULL;
+ if ((s.st_mode & S_IFMT) != S_IFREG) return NULL;
+ size = (unsigned long)(s.st_size);
+ if (size == 0 || (off_t)size != s.st_size) return NULL;
+ in = fopen(name, "r");
+ if (in == NULL) return NULL;
+ buf = malloc(size);
+ if (buf != NULL && fread(buf, 1, size, in) != size) {
+ free(buf);
+ buf = NULL;
+ }
+ fclose(in);
+ *len = size;
+ return buf;
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+ unsigned char *source;
+ unsigned long len, sourcelen, destlen;
+
+ if (argc < 2) return 2;
+ source = yank(argv[1], &len);
+ if (source == NULL) return 2;
+ sourcelen = len;
+ ret = puff(NIL, &destlen, source, &sourcelen);
+ if (ret)
+ printf("puff() failed with return code %d\n", ret);
+ else {
+ printf("puff() succeeded uncompressing %lu bytes\n", destlen);
+ if (sourcelen < len) printf("%lu compressed bytes unused\n",
+ len - sourcelen);
+ }
+ free(source);
+ return ret;
+}
+#endif
--- /dev/null
+/* puff.h
+ Copyright (C) 2002, 2003 Mark Adler, all rights reserved
+ version 1.7, 3 Mar 2002
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the author be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Mark Adler madler@alumni.caltech.edu
+ */
+
+
+/*
+ * See puff.c for purpose and usage.
+ */
+int puff(unsigned char *dest, /* pointer to destination pointer */
+ unsigned long *destlen, /* amount of output space */
+ unsigned char *source, /* pointer to source data pointer */
+ unsigned long *sourcelen); /* amount of input available */
/* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
+ * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
+ * tables for updating the shift register in one step with three exclusive-ors
+ * instead of four steps with four exclusive-ors. This results about a 50%
+ * increase in speed on a Power PC using gcc -O3.
*/
/* @(#) $Id$ */
+#ifdef MAKECRCH
+# include <stdio.h>
+# ifndef DYNAMIC_CRC_TABLE
+# define DYNAMIC_CRC_TABLE
+# endif /* !DYNAMIC_CRC_TABLE */
+#endif /* MAKECRCH */
+
#include "zlib.h"
#define local static
+/* Find a four-byte integer type for crc32_little() and crc32_big(). */
+#ifndef NOBYFOUR
+# ifdef __STDC__ /* need ANSI C limits.h to determine sizes */
+# include <limits.h>
+# define BYFOUR
+# if (UINT_MAX == 4294967295)
+ typedef unsigned int u4;
+# elif (ULONG_MAX == 4294967295)
+ typedef unsigned long u4;
+# elif (USHRT_MAX == 4294967295)
+ typedef unsigned short u4;
+# else
+# undef BYFOUR /* can't find a four-byte integer type! */
+# endif
+# endif /* __STDC__ */
+#endif /* !NOBYFOUR */
+
+/* Definitions for doing the crc four data bytes at a time. */
+#ifdef BYFOUR
+# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
+ (((w)&0xff00)<<8)+(((w)&0xff)<<24))
+ local unsigned long crc32_little OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+ local unsigned long crc32_big OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+# define TBLS 8
+#else
+# define TBLS 1
+#endif /* BYFOUR */
+
#ifdef DYNAMIC_CRC_TABLE
local int crc_table_empty = 1;
-local uLongf crc_table[256];
+local unsigned long FAR crc_table[TBLS][256];
local void make_crc_table OF((void));
+#ifdef MAKECRCH
+ local void write_table OF((FILE *, const unsigned long FAR *));
+#endif /* MAKECRCH */
/*
- Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
+ Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
Polynomials over GF(2) are represented in binary, one bit per coefficient,
out is a one). We start with the highest power (least significant bit) of
q and repeat for all eight bits of q.
- The table is simply the CRC of all possible eight bit values. This is all
- the information needed to generate CRC's on data a byte at a time for all
- combinations of CRC register values and incoming bytes.
+ The first table is simply the CRC of all possible eight bit values. This is
+ all the information needed to generate CRCs on data a byte at a time for all
+ combinations of CRC register values and incoming bytes. The remaining tables
+ allow for word-at-a-time CRC calculation for both big-endian and little-
+ endian machines, where a word is four bytes.
*/
local void make_crc_table()
{
- uLong c;
- int n, k;
- uLong poly; /* polynomial exclusive-or pattern */
- /* terms of polynomial defining this crc (except x^32): */
- static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
-
- /* make exclusive-or pattern from polynomial (0xedb88320L) */
- poly = 0L;
- for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
- poly |= 1L << (31 - p[n]);
-
- for (n = 0; n < 256; n++)
- {
- c = (uLong)n;
- for (k = 0; k < 8; k++)
- c = c & 1 ? poly ^ (c >> 1) : c >> 1;
- crc_table[n] = c;
- }
+ unsigned long c;
+ int n, k;
+ unsigned long poly; /* polynomial exclusive-or pattern */
+ /* terms of polynomial defining this crc (except x^32): */
+ static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
+
+ /* make exclusive-or pattern from polynomial (0xedb88320L) */
+ poly = 0UL;
+ for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
+ poly |= 1UL << (31 - p[n]);
+
+ /* generate a crc for every 8-bit value */
+ for (n = 0; n < 256; n++) {
+ c = (unsigned long)n;
+ for (k = 0; k < 8; k++)
+ c = c & 1 ? poly ^ (c >> 1) : c >> 1;
+ crc_table[0][n] = c;
+ }
+
+#ifdef BYFOUR
+ /* generate crc for each value followed by one, two, and three zeros, and
+ then the byte reversal of those as well as the first table */
+ for (n = 0; n < 256; n++) {
+ c = crc_table[0][n];
+ crc_table[4][n] = REV(c);
+ for (k = 1; k < 4; k++) {
+ c = crc_table[0][c & 0xff] ^ (c >> 8);
+ crc_table[k][n] = c;
+ crc_table[k + 4][n] = REV(c);
+ }
+ }
+#endif /* BYFOUR */
+
crc_table_empty = 0;
+
+#ifdef MAKECRCH
+ /* write out CRC tables to crc32.h */
+ {
+ FILE *out;
+
+ out = fopen("crc32.h", "w");
+ if (out == NULL) return;
+ fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
+ fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
+ fprintf(out, "local const unsigned long FAR ");
+ fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
+ write_table(out, crc_table[0]);
+# ifdef BYFOUR
+ fprintf(out, "#ifdef BYFOUR\n");
+ for (k = 1; k < 8; k++) {
+ fprintf(out, " },\n {\n");
+ write_table(out, crc_table[k]);
+ }
+ fprintf(out, "#endif\n");
+# endif /* BYFOUR */
+ fprintf(out, " }\n};\n");
+ fclose(out);
+ }
+#endif /* MAKECRCH */
}
-#else
+
+#ifdef MAKECRCH
+local void write_table(out, table)
+ FILE *out;
+ const unsigned long FAR *table;
+{
+ int n;
+
+ for (n = 0; n < 256; n++)
+ fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
+ n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
+}
+#endif /* MAKECRCH */
+
+#else /* !DYNAMIC_CRC_TABLE */
/* ========================================================================
- * Table of CRC-32's of all single-byte values (made by make_crc_table)
+ * Tables of CRC-32s of all single-byte values, made by make_crc_table().
*/
-local const uLongf crc_table[256] = {
- 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
- 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
- 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
- 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
- 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
- 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
- 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
- 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
- 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
- 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
- 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
- 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
- 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
- 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
- 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
- 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
- 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
- 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
- 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
- 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
- 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
- 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
- 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
- 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
- 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
- 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
- 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
- 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
- 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
- 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
- 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
- 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
- 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
- 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
- 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
- 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
- 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
- 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
- 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
- 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
- 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
- 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
- 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
- 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
- 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
- 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
- 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
- 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
- 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
- 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
- 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
- 0x2d02ef8dL
-};
-#endif
+#include "crc32.h"
+#endif /* DYNAMIC_CRC_TABLE */
/* =========================================================================
* This function can be used by asm versions of crc32()
*/
-const uLongf * ZEXPORT get_crc_table()
+const unsigned long FAR * ZEXPORT get_crc_table()
{
#ifdef DYNAMIC_CRC_TABLE
if (crc_table_empty) make_crc_table();
-#endif
- return (const uLongf *)crc_table;
+#endif /* DYNAMIC_CRC_TABLE */
+ return (const unsigned long FAR *)crc_table;
}
/* ========================================================================= */
-#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
-#define DO2(buf) DO1(buf); DO1(buf);
-#define DO4(buf) DO2(buf); DO2(buf);
-#define DO8(buf) DO4(buf); DO4(buf);
+#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
+#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
/* ========================================================================= */
-uLong ZEXPORT crc32(crc, buf, len)
- uLong crc;
- const Bytef *buf;
- uInt len;
+unsigned long ZEXPORT crc32(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
{
- if (buf == Z_NULL) return 0L;
+ if (buf == Z_NULL) return 0UL;
+
#ifdef DYNAMIC_CRC_TABLE
if (crc_table_empty)
- make_crc_table();
-#endif
- crc = crc ^ 0xffffffffL;
- while (len >= 8)
+ make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+
+#ifdef BYFOUR
{
- DO8(buf);
- len -= 8;
+ u4 endian;
+
+ endian = 1;
+ if (*((unsigned char *)(&endian)))
+ return crc32_little(crc, buf, len);
+ else
+ return crc32_big(crc, buf, len);
+ }
+#else /* !BYFOUR */
+ crc = crc ^ 0xffffffffUL;
+ while (len >= 8) {
+ DO8;
+ len -= 8;
+ }
+ if (len) do {
+ DO1;
+ } while (--len);
+ return crc ^ 0xffffffffUL;
+#endif /* BYFOUR */
+}
+
+#ifdef BYFOUR
+
+/* ========================================================================= */
+#define DOLIT4 c ^= *buf4++; \
+ c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
+ crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
+#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
+
+/* ========================================================================= */
+local unsigned long crc32_little(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{
+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = (u4)crc;
+ c = ~c;
+ while (len && ((int)buf & 3)) {
+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)buf;
+ while (len >= 32) {
+ DOLIT32;
+ len -= 32;
+ }
+ while (len >= 4) {
+ DOLIT4;
+ len -= 4;
}
+ buf = (const unsigned char FAR *)buf4;
+
if (len) do {
- DO1(buf);
+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
} while (--len);
- return crc ^ 0xffffffffL;
+ c = ~c;
+ return (unsigned long)c;
}
+
+/* ========================================================================= */
+#define DOBIG4 c ^= *++buf4; \
+ c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
+ crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
+#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
+
+/* ========================================================================= */
+local unsigned long crc32_big(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{
+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = REV((u4)crc);
+ c = ~c;
+ while (len && ((int)buf & 3)) {
+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)buf;
+ buf4--;
+ while (len >= 32) {
+ DOBIG32;
+ len -= 32;
+ }
+ while (len >= 4) {
+ DOBIG4;
+ len -= 4;
+ }
+ buf4++;
+ buf = (const unsigned char FAR *)buf4;
+
+ if (len) do {
+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ } while (--len);
+ c = ~c;
+ return (unsigned long)(REV(c));
+}
+
+#endif /* BYFOUR */
--- /dev/null
+/* crc32.h -- tables for rapid CRC calculation
+ * Generated automatically by crc32.c
+ */
+
+local const unsigned long FAR crc_table[TBLS][256] =
+{
+ {
+ 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
+ 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
+ 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
+ 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
+ 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
+ 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
+ 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
+ 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
+ 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
+ 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
+ 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
+ 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
+ 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
+ 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
+ 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
+ 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
+ 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
+ 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
+ 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
+ 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
+ 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
+ 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
+ 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
+ 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
+ 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
+ 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
+ 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
+ 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
+ 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
+ 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
+ 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
+ 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
+ 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
+ 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
+ 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
+ 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
+ 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
+ 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
+ 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
+ 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
+ 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
+ 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
+ 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
+ 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
+ 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
+ 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
+ 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
+ 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
+ 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
+ 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
+ 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
+ 0x2d02ef8dUL
+#ifdef BYFOUR
+ },
+ {
+ 0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
+ 0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
+ 0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
+ 0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
+ 0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
+ 0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
+ 0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
+ 0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
+ 0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
+ 0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
+ 0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
+ 0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
+ 0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
+ 0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
+ 0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
+ 0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
+ 0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
+ 0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
+ 0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
+ 0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
+ 0x0191aea3UL, 0x188a9fe2UL, 0x33a7cc21UL, 0x2abcfd60UL, 0xad24e1afUL,
+ 0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
+ 0xfb7e4629UL, 0xe2657768UL, 0x2f3f79f6UL, 0x362448b7UL, 0x1d091b74UL,
+ 0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
+ 0xe7e6f3feUL, 0xfefdc2bfUL, 0xd5d0917cUL, 0xcccba03dUL, 0x838a36faUL,
+ 0x9a9107bbUL, 0xb1bc5478UL, 0xa8a76539UL, 0x3b83984bUL, 0x2298a90aUL,
+ 0x09b5fac9UL, 0x10aecb88UL, 0x5fef5d4fUL, 0x46f46c0eUL, 0x6dd93fcdUL,
+ 0x74c20e8cUL, 0xf35a1243UL, 0xea412302UL, 0xc16c70c1UL, 0xd8774180UL,
+ 0x9736d747UL, 0x8e2de606UL, 0xa500b5c5UL, 0xbc1b8484UL, 0x71418a1aUL,
+ 0x685abb5bUL, 0x4377e898UL, 0x5a6cd9d9UL, 0x152d4f1eUL, 0x0c367e5fUL,
+ 0x271b2d9cUL, 0x3e001cddUL, 0xb9980012UL, 0xa0833153UL, 0x8bae6290UL,
+ 0x92b553d1UL, 0xddf4c516UL, 0xc4eff457UL, 0xefc2a794UL, 0xf6d996d5UL,
+ 0xae07bce9UL, 0xb71c8da8UL, 0x9c31de6bUL, 0x852aef2aUL, 0xca6b79edUL,
+ 0xd37048acUL, 0xf85d1b6fUL, 0xe1462a2eUL, 0x66de36e1UL, 0x7fc507a0UL,
+ 0x54e85463UL, 0x4df36522UL, 0x02b2f3e5UL, 0x1ba9c2a4UL, 0x30849167UL,
+ 0x299fa026UL, 0xe4c5aeb8UL, 0xfdde9ff9UL, 0xd6f3cc3aUL, 0xcfe8fd7bUL,
+ 0x80a96bbcUL, 0x99b25afdUL, 0xb29f093eUL, 0xab84387fUL, 0x2c1c24b0UL,
+ 0x350715f1UL, 0x1e2a4632UL, 0x07317773UL, 0x4870e1b4UL, 0x516bd0f5UL,
+ 0x7a468336UL, 0x635db277UL, 0xcbfad74eUL, 0xd2e1e60fUL, 0xf9ccb5ccUL,
+ 0xe0d7848dUL, 0xaf96124aUL, 0xb68d230bUL, 0x9da070c8UL, 0x84bb4189UL,
+ 0x03235d46UL, 0x1a386c07UL, 0x31153fc4UL, 0x280e0e85UL, 0x674f9842UL,
+ 0x7e54a903UL, 0x5579fac0UL, 0x4c62cb81UL, 0x8138c51fUL, 0x9823f45eUL,
+ 0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
+ 0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
+ 0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
+ 0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
+ 0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
+ 0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
+ 0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
+ 0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
+ 0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
+ 0x9324fd72UL
+ },
+ {
+ 0x00000000UL, 0x01c26a37UL, 0x0384d46eUL, 0x0246be59UL, 0x0709a8dcUL,
+ 0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
+ 0x0d9785d6UL, 0x0c55efe1UL, 0x091af964UL, 0x08d89353UL, 0x0a9e2d0aUL,
+ 0x0b5c473dUL, 0x1c26a370UL, 0x1de4c947UL, 0x1fa2771eUL, 0x1e601d29UL,
+ 0x1b2f0bacUL, 0x1aed619bUL, 0x18abdfc2UL, 0x1969b5f5UL, 0x1235f2c8UL,
+ 0x13f798ffUL, 0x11b126a6UL, 0x10734c91UL, 0x153c5a14UL, 0x14fe3023UL,
+ 0x16b88e7aUL, 0x177ae44dUL, 0x384d46e0UL, 0x398f2cd7UL, 0x3bc9928eUL,
+ 0x3a0bf8b9UL, 0x3f44ee3cUL, 0x3e86840bUL, 0x3cc03a52UL, 0x3d025065UL,
+ 0x365e1758UL, 0x379c7d6fUL, 0x35dac336UL, 0x3418a901UL, 0x3157bf84UL,
+ 0x3095d5b3UL, 0x32d36beaUL, 0x331101ddUL, 0x246be590UL, 0x25a98fa7UL,
+ 0x27ef31feUL, 0x262d5bc9UL, 0x23624d4cUL, 0x22a0277bUL, 0x20e69922UL,
+ 0x2124f315UL, 0x2a78b428UL, 0x2bbade1fUL, 0x29fc6046UL, 0x283e0a71UL,
+ 0x2d711cf4UL, 0x2cb376c3UL, 0x2ef5c89aUL, 0x2f37a2adUL, 0x709a8dc0UL,
+ 0x7158e7f7UL, 0x731e59aeUL, 0x72dc3399UL, 0x7793251cUL, 0x76514f2bUL,
+ 0x7417f172UL, 0x75d59b45UL, 0x7e89dc78UL, 0x7f4bb64fUL, 0x7d0d0816UL,
+ 0x7ccf6221UL, 0x798074a4UL, 0x78421e93UL, 0x7a04a0caUL, 0x7bc6cafdUL,
+ 0x6cbc2eb0UL, 0x6d7e4487UL, 0x6f38fadeUL, 0x6efa90e9UL, 0x6bb5866cUL,
+ 0x6a77ec5bUL, 0x68315202UL, 0x69f33835UL, 0x62af7f08UL, 0x636d153fUL,
+ 0x612bab66UL, 0x60e9c151UL, 0x65a6d7d4UL, 0x6464bde3UL, 0x662203baUL,
+ 0x67e0698dUL, 0x48d7cb20UL, 0x4915a117UL, 0x4b531f4eUL, 0x4a917579UL,
+ 0x4fde63fcUL, 0x4e1c09cbUL, 0x4c5ab792UL, 0x4d98dda5UL, 0x46c49a98UL,
+ 0x4706f0afUL, 0x45404ef6UL, 0x448224c1UL, 0x41cd3244UL, 0x400f5873UL,
+ 0x4249e62aUL, 0x438b8c1dUL, 0x54f16850UL, 0x55330267UL, 0x5775bc3eUL,
+ 0x56b7d609UL, 0x53f8c08cUL, 0x523aaabbUL, 0x507c14e2UL, 0x51be7ed5UL,
+ 0x5ae239e8UL, 0x5b2053dfUL, 0x5966ed86UL, 0x58a487b1UL, 0x5deb9134UL,
+ 0x5c29fb03UL, 0x5e6f455aUL, 0x5fad2f6dUL, 0xe1351b80UL, 0xe0f771b7UL,
+ 0xe2b1cfeeUL, 0xe373a5d9UL, 0xe63cb35cUL, 0xe7fed96bUL, 0xe5b86732UL,
+ 0xe47a0d05UL, 0xef264a38UL, 0xeee4200fUL, 0xeca29e56UL, 0xed60f461UL,
+ 0xe82fe2e4UL, 0xe9ed88d3UL, 0xebab368aUL, 0xea695cbdUL, 0xfd13b8f0UL,
+ 0xfcd1d2c7UL, 0xfe976c9eUL, 0xff5506a9UL, 0xfa1a102cUL, 0xfbd87a1bUL,
+ 0xf99ec442UL, 0xf85cae75UL, 0xf300e948UL, 0xf2c2837fUL, 0xf0843d26UL,
+ 0xf1465711UL, 0xf4094194UL, 0xf5cb2ba3UL, 0xf78d95faUL, 0xf64fffcdUL,
+ 0xd9785d60UL, 0xd8ba3757UL, 0xdafc890eUL, 0xdb3ee339UL, 0xde71f5bcUL,
+ 0xdfb39f8bUL, 0xddf521d2UL, 0xdc374be5UL, 0xd76b0cd8UL, 0xd6a966efUL,
+ 0xd4efd8b6UL, 0xd52db281UL, 0xd062a404UL, 0xd1a0ce33UL, 0xd3e6706aUL,
+ 0xd2241a5dUL, 0xc55efe10UL, 0xc49c9427UL, 0xc6da2a7eUL, 0xc7184049UL,
+ 0xc25756ccUL, 0xc3953cfbUL, 0xc1d382a2UL, 0xc011e895UL, 0xcb4dafa8UL,
+ 0xca8fc59fUL, 0xc8c97bc6UL, 0xc90b11f1UL, 0xcc440774UL, 0xcd866d43UL,
+ 0xcfc0d31aUL, 0xce02b92dUL, 0x91af9640UL, 0x906dfc77UL, 0x922b422eUL,
+ 0x93e92819UL, 0x96a63e9cUL, 0x976454abUL, 0x9522eaf2UL, 0x94e080c5UL,
+ 0x9fbcc7f8UL, 0x9e7eadcfUL, 0x9c381396UL, 0x9dfa79a1UL, 0x98b56f24UL,
+ 0x99770513UL, 0x9b31bb4aUL, 0x9af3d17dUL, 0x8d893530UL, 0x8c4b5f07UL,
+ 0x8e0de15eUL, 0x8fcf8b69UL, 0x8a809decUL, 0x8b42f7dbUL, 0x89044982UL,
+ 0x88c623b5UL, 0x839a6488UL, 0x82580ebfUL, 0x801eb0e6UL, 0x81dcdad1UL,
+ 0x8493cc54UL, 0x8551a663UL, 0x8717183aUL, 0x86d5720dUL, 0xa9e2d0a0UL,
+ 0xa820ba97UL, 0xaa6604ceUL, 0xaba46ef9UL, 0xaeeb787cUL, 0xaf29124bUL,
+ 0xad6fac12UL, 0xacadc625UL, 0xa7f18118UL, 0xa633eb2fUL, 0xa4755576UL,
+ 0xa5b73f41UL, 0xa0f829c4UL, 0xa13a43f3UL, 0xa37cfdaaUL, 0xa2be979dUL,
+ 0xb5c473d0UL, 0xb40619e7UL, 0xb640a7beUL, 0xb782cd89UL, 0xb2cddb0cUL,
+ 0xb30fb13bUL, 0xb1490f62UL, 0xb08b6555UL, 0xbbd72268UL, 0xba15485fUL,
+ 0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
+ 0xbe9834edUL
+ },
+ {
+ 0x00000000UL, 0xb8bc6765UL, 0xaa09c88bUL, 0x12b5afeeUL, 0x8f629757UL,
+ 0x37def032UL, 0x256b5fdcUL, 0x9dd738b9UL, 0xc5b428efUL, 0x7d084f8aUL,
+ 0x6fbde064UL, 0xd7018701UL, 0x4ad6bfb8UL, 0xf26ad8ddUL, 0xe0df7733UL,
+ 0x58631056UL, 0x5019579fUL, 0xe8a530faUL, 0xfa109f14UL, 0x42acf871UL,
+ 0xdf7bc0c8UL, 0x67c7a7adUL, 0x75720843UL, 0xcdce6f26UL, 0x95ad7f70UL,
+ 0x2d111815UL, 0x3fa4b7fbUL, 0x8718d09eUL, 0x1acfe827UL, 0xa2738f42UL,
+ 0xb0c620acUL, 0x087a47c9UL, 0xa032af3eUL, 0x188ec85bUL, 0x0a3b67b5UL,
+ 0xb28700d0UL, 0x2f503869UL, 0x97ec5f0cUL, 0x8559f0e2UL, 0x3de59787UL,
+ 0x658687d1UL, 0xdd3ae0b4UL, 0xcf8f4f5aUL, 0x7733283fUL, 0xeae41086UL,
+ 0x525877e3UL, 0x40edd80dUL, 0xf851bf68UL, 0xf02bf8a1UL, 0x48979fc4UL,
+ 0x5a22302aUL, 0xe29e574fUL, 0x7f496ff6UL, 0xc7f50893UL, 0xd540a77dUL,
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+ 0xe4e22fe8UL, 0xd388ede9UL, 0x8a36abebUL, 0xbd5c69eaUL, 0xf0b813fdUL,
+ 0xc7d2d1fcUL, 0x9e6c97feUL, 0xa90655ffUL, 0x2c101afaUL, 0x1b7ad8fbUL,
+ 0x42c49ef9UL, 0x75ae5cf8UL, 0x48e900f3UL, 0x7f83c2f2UL, 0x263d84f0UL,
+ 0x115746f1UL, 0x944109f4UL, 0xa32bcbf5UL, 0xfa958df7UL, 0xcdff4ff6UL,
+ 0x605d78d9UL, 0x5737bad8UL, 0x0e89fcdaUL, 0x39e33edbUL, 0xbcf571deUL,
+ 0x8b9fb3dfUL, 0xd221f5ddUL, 0xe54b37dcUL, 0xd80c6bd7UL, 0xef66a9d6UL,
+ 0xb6d8efd4UL, 0x81b22dd5UL, 0x04a462d0UL, 0x33cea0d1UL, 0x6a70e6d3UL,
+ 0x5d1a24d2UL, 0x10fe5ec5UL, 0x27949cc4UL, 0x7e2adac6UL, 0x494018c7UL,
+ 0xcc5657c2UL, 0xfb3c95c3UL, 0xa282d3c1UL, 0x95e811c0UL, 0xa8af4dcbUL,
+ 0x9fc58fcaUL, 0xc67bc9c8UL, 0xf1110bc9UL, 0x740744ccUL, 0x436d86cdUL,
+ 0x1ad3c0cfUL, 0x2db902ceUL, 0x4096af91UL, 0x77fc6d90UL, 0x2e422b92UL,
+ 0x1928e993UL, 0x9c3ea696UL, 0xab546497UL, 0xf2ea2295UL, 0xc580e094UL,
+ 0xf8c7bc9fUL, 0xcfad7e9eUL, 0x9613389cUL, 0xa179fa9dUL, 0x246fb598UL,
+ 0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
+ 0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL,
+ 0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL,
+ 0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL,
+ 0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL,
+ 0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL,
+ 0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
+ 0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
+ 0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
+ 0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
+ 0xed3498beUL
+ },
+ {
+ 0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
+ 0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
+ 0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL,
+ 0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL,
+ 0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL,
+ 0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL,
+ 0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
+ 0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL,
+ 0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL,
+ 0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL,
+ 0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL,
+ 0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
+ 0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
+ 0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
+ 0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
+ 0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL,
+ 0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL,
+ 0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL,
+ 0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
+ 0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
+ 0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
+ 0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
+ 0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
+ 0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
+ 0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
+ 0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
+ 0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
+ 0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
+ 0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
+ 0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
+ 0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
+ 0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
+ 0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
+ 0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
+ 0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
+ 0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
+ 0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
+ 0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
+ 0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
+ 0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
+ 0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
+ 0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
+ 0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
+ 0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
+ 0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
+ 0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
+ 0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
+ 0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
+ 0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
+ 0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
+ 0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
+ 0xf10605deUL
+#endif
+ }
+};
/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "deflate.h"
const char deflate_copyright[] =
- " deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
+ " deflate 1.2.0 Copyright 1995-2003 Jean-loup Gailly ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
{
deflate_state *s;
int noheader = 0;
- static const char* my_version = ZLIB_VERSION;
+ static const char my_version[] = ZLIB_VERSION;
ushf *overlay;
/* We overlay pending_buf and d_buf+l_buf. This works since the average
if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
s->pending_buf == Z_NULL) {
+ s->status = FINISH_STATE;
strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
deflateEnd (strm);
return Z_MEM_ERROR;
IPos hash_head = 0;
if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
- strm->state->status != INIT_STATE) return Z_STREAM_ERROR;
+ (!strm->state->noheader && strm->state->status != INIT_STATE))
+ return Z_STREAM_ERROR;
s = strm->state;
- strm->adler = adler32(strm->adler, dictionary, dictLength);
+ if (!s->noheader)
+ strm->adler = adler32(strm->adler, dictionary, dictLength);
if (length < MIN_MATCH) return Z_OK;
if (length > MAX_DIST(s)) {
return err;
}
+/* =========================================================================
+ * For the default windowBits of 15 and memLevel of 8, this function returns
+ * a close to exact, as well as small, upper bound on the compressed size.
+ * They are coded as constants here for a reason--if the #define's are
+ * changed, then this function needs to be changed as well. The return
+ * value for 15 and 8 only works for those exact settings.
+ *
+ * For any setting other than those defaults for windowBits and memLevel,
+ * the value returned is a conservative worst case for the maximum expansion
+ * resulting from using fixed blocks instead of stored blocks, which deflate
+ * can emit on compressed data for some combinations of the parameters.
+ *
+ * This function could be more sophisticated to provide closer upper bounds
+ * for every combination of windowBits and memLevel, as well as noheader.
+ * But even the conservative upper bound of about 14% expansion does not
+ * seem onerous for output buffer allocation.
+ */
+uLong ZEXPORT deflateBound(strm, sourceLen)
+ z_streamp strm;
+ uLong sourceLen;
+{
+ deflate_state *s;
+ uLong destLen;
+
+ /* conservative upper bound */
+ destLen = sourceLen +
+ ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
+
+ /* if can't get parameters, return conservative bound */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return destLen;
+
+ /* if not default parameters, return conservative bound */
+ s = strm->state;
+ if (s->w_bits != 15 || s->hash_bits != 8 + 7)
+ return destLen;
+
+ /* default settings: return tight bound for that case */
+ return compressBound(sourceLen);
+}
+
/* =========================================================================
* Put a short in the pending buffer. The 16-bit value is put in MSB order.
* IN assertion: the stream state is correct and there is enough room in
+++ /dev/null
-# descrip.mms: MMS description file for building zlib on VMS
-# written by Martin P.J. Zinser <m.zinser@gsi.de>
-
-cc_defs =
-c_deb =
-
-.ifdef __DECC__
-pref = /prefix=all
-.endif
-
-OBJS = adler32.obj, compress.obj, crc32.obj, gzio.obj, uncompr.obj,\
- deflate.obj, trees.obj, zutil.obj, inflate.obj, infblock.obj,\
- inftrees.obj, infcodes.obj, infutil.obj, inffast.obj
-
-CFLAGS= $(C_DEB) $(CC_DEFS) $(PREF)
-
-all : example.exe minigzip.exe
- @ write sys$output " Example applications available"
-libz.olb : libz.olb($(OBJS))
- @ write sys$output " libz available"
-
-example.exe : example.obj libz.olb
- link example,libz.olb/lib
-
-minigzip.exe : minigzip.obj libz.olb
- link minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib
-
-clean :
- delete *.obj;*,libz.olb;*
-
-
-# Other dependencies.
-adler32.obj : zutil.h zlib.h zconf.h
-compress.obj : zlib.h zconf.h
-crc32.obj : zutil.h zlib.h zconf.h
-deflate.obj : deflate.h zutil.h zlib.h zconf.h
-example.obj : zlib.h zconf.h
-gzio.obj : zutil.h zlib.h zconf.h
-infblock.obj : zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-infcodes.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
-inffast.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
-inflate.obj : zutil.h zlib.h zconf.h infblock.h
-inftrees.obj : zutil.h zlib.h zconf.h inftrees.h
-infutil.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h
-minigzip.obj : zlib.h zconf.h
-trees.obj : deflate.h zutil.h zlib.h zconf.h
-uncompr.obj : zlib.h zconf.h
-zutil.obj : zutil.h zlib.h zconf.h
/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
test_dict_deflate(compr, comprLen);
test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
+ free(compr);
+ free(uncompr);
+
exit(0);
return 0; /* to avoid warning */
}
/* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Compile this file with -DNO_DEFLATE to avoid the compression code.
# define Z_PRINTF_BUFSIZE 4096
#endif
+#ifndef STDC
+extern voidp malloc OF((uInt size));
+extern void free OF((voidpf ptr));
+#endif
+
#define ALLOC(size) malloc(size)
#define TRYFREE(p) {if (p) free(p);}
-static int gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
+static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
/* gzip flag byte */
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
uInt len;
int c;
- /* Check the gzip magic header */
- for (len = 0; len < 2; len++) {
- c = get_byte(s);
- if (c != gz_magic[len]) {
- if (len != 0) s->stream.avail_in++, s->stream.next_in--;
- if (c != EOF) {
- s->stream.avail_in++, s->stream.next_in--;
- s->transparent = 1;
- }
- s->z_err = s->stream.avail_in != 0 ? Z_OK : Z_STREAM_END;
- return;
- }
+ /* Assure two bytes in the buffer so we can peek ahead -- handle case
+ where first byte of header is at the end of the buffer after the last
+ gzip segment */
+ len = s->stream.avail_in;
+ if (len < 2) {
+ if (len) s->inbuf[0] = s->stream.next_in[0];
+ errno = 0;
+ len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+ if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
+ s->stream.avail_in += len;
+ s->stream.next_in = s->inbuf;
+ if (s->stream.avail_in < 2) {
+ s->transparent = s->stream.avail_in;
+ return;
+ }
}
+
+ /* Peek ahead to check the gzip magic header */
+ if (s->stream.next_in[0] != gz_magic[0] ||
+ s->stream.next_in[1] != gz_magic[1]) {
+ s->transparent = 1;
+ return;
+ }
+ s->stream.avail_in -= 2;
+ s->stream.next_in += 2;
+
+ /* Check the rest of the gzip header */
method = get_byte(s);
flags = get_byte(s);
if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
*/
int ZEXPORT gzwrite (file, buf, len)
gzFile file;
- const voidp buf;
+ voidpc buf;
unsigned len;
{
gz_stream *s = (gz_stream*)file;
int len;
va_start(va, format);
-#ifdef HAS_vsnprintf
- (void)vsnprintf(buf, sizeof(buf), format, va);
-#else
+#ifdef NO_vsnprintf
+# ifdef HAS_vsprintf_void
(void)vsprintf(buf, format, va);
-#endif
va_end(va);
len = strlen(buf); /* some *sprintf don't return the nb of bytes written */
if (len <= 0) return 0;
+# else
+ len = vsprintf(buf, format, va);
+ va_end(va);
+ if (len <= 0 || len >= sizeof(buf))
+ return 0;
+# endif
+#else
+# ifdef HAS_vsnprintf_void
+ (void)vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+ len = strlen(buf);
+ if (len <= 0)
+ return 0;
+# else
+ len = vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+ if (len <= 0 || len >= sizeof(buf))
+ return 0;
+# endif
+#endif
return gzwrite(file, buf, (unsigned)len);
}
char buf[Z_PRINTF_BUFSIZE];
int len;
-#ifdef HAS_snprintf
- snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-#else
+#ifdef NO_snprintf
+# ifdef HAS_sprintf_void
sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-#endif
len = strlen(buf); /* old sprintf doesn't return the nb of bytes written */
if (len <= 0) return 0;
+# else
+ len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ if (len <= 0 || len >= sizeof(buf))
+ return 0;
+# endif
+#else
+# ifdef HAS_snprintf_void
+ snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ len = strlen(buf);
+ if (len <= 0)
+ return 0;
+# else
+ len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ if (len <= 0 || len >= sizeof(buf))
+ return 0;
+# endif
+#endif
return gzwrite(file, buf, len);
}
/* At this point, offset is the number of zero bytes to write. */
if (s->inbuf == Z_NULL) {
s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
+ if (s->inbuf == Z_NULL) return -1L;
zmemzero(s->inbuf, Z_BUFSIZE);
}
while (offset > 0) {
if (offset != 0 && s->outbuf == Z_NULL) {
s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+ if (s->outbuf == Z_NULL) return -1L;
}
while (offset > 0) {
int size = Z_BUFSIZE;
*errnum = s->z_err;
if (*errnum == Z_OK) return (const char*)"";
- m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
+ m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
TRYFREE(s->msg);
s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
+ if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
strcpy(s->msg, s->path);
strcat(s->msg, ": ");
strcat(s->msg, m);
--- /dev/null
+/* infback.c -- inflate using a call-back interface
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ This code is largely copied from inflate.c. Normally either infback.o or
+ inflate.o would be linked into an application--not both. The interface
+ with inffast.c is retained so that optimized assembler-coded versions of
+ inflate_fast() can be used with either inflate.c or infback.c.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+
+/*
+ strm provides memory allocation functions in zalloc and zfree, or
+ Z_NULL to use the library memory allocation functions.
+
+ windowBits is in the range 8..15, and window is a user-supplied
+ window and output buffer that is 2**windowBits bytes.
+ */
+int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
+z_stream FAR *strm;
+int windowBits;
+unsigned char FAR *window;
+const char *version;
+int stream_size;
+{
+ struct inflate_state FAR *state;
+
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL || window == Z_NULL ||
+ windowBits < 8 || windowBits > 15)
+ return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == Z_NULL) {
+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == Z_NULL) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)ZALLOC(strm, 1,
+ sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (voidpf)state;
+ state->wbits = windowBits;
+ state->wsize = 1U << windowBits;
+ state->window = window;
+ state->write = 0;
+ return Z_OK;
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{
+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
+}
+
+/* Macros for inflateBack(): */
+
+/* Load returned state from inflate_fast() */
+#define LOAD() \
+ do { \
+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Set state from registers for inflate_fast() */
+#define RESTORE() \
+ do { \
+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \
+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Assure that some input is available. If input is requested, but denied,
+ then return a Z_BUF_ERROR from inflateBack(). */
+#define PULL() \
+ do { \
+ if (have == 0) { \
+ have = in(in_desc, &next); \
+ if (have == 0) { \
+ next = Z_NULL; \
+ ret = Z_BUF_ERROR; \
+ goto leave; \
+ } \
+ } \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflateBack()
+ with an error if there is no input available. */
+#define PULLBYTE() \
+ do { \
+ PULL(); \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflateBack() with
+ an error. */
+#define NEEDBITS(n) \
+ do { \
+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \
+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \
+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Assure that some output space is available, by writing out the window
+ if it's full. If the write fails, return from inflateBack() with a
+ Z_BUF_ERROR. */
+#define ROOM() \
+ do { \
+ if (left == 0) { \
+ put = state->window; \
+ left = state->wsize; \
+ if (out(out_desc, put, left)) { \
+ ret = Z_BUF_ERROR; \
+ goto leave; \
+ } \
+ } \
+ } while (0)
+
+/*
+ strm provides the memory allocation functions and window buffer on input,
+ and provides information on the unused input on return. For Z_DATA_ERROR
+ returns, strm will also provide an error message.
+
+ in() and out() are the call-back input and output functions. When
+ inflateBack() needs more input, it calls in(). When inflateBack() has
+ filled the window with output, or when it completes with data in the
+ window, it called out() to write out the data. The application must not
+ change the provided input until in() is called again or inflateBack()
+ returns. The application must not change the window/output buffer until
+ inflateBack() returns.
+
+ in() and out() are called with a descriptor parameter provided in the
+ inflateBack() call. This parameter can be a structure that provides the
+ information required to do the read or write, as well as accumulated
+ information on the input and output such as totals and check values.
+
+ in() should return zero on failure. out() should return non-zero on
+ failure. If either in() or out() fails, than inflateBack() returns a
+ Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
+ was in() or out() that caused in the error. Otherwise, inflateBack()
+ returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
+ error, or Z_MEM_ERROR if it could not allocate memory for the state.
+ inflateBack() can also return Z_STREAM_ERROR if the input parameters
+ are not correct, i.e. strm is Z_NULL or the state was not initialized.
+ */
+int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
+z_stream FAR *strm;
+in_func in;
+void FAR *in_desc;
+out_func out;
+void FAR *out_desc;
+{
+ struct inflate_state FAR *state;
+ unsigned char *next, *put; /* next input and output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+ /* Check that the strm exists and that the state was initialized */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* Reset the state */
+ strm->msg = Z_NULL;
+ state->mode = TYPE;
+ state->last = 0;
+ next = strm->next_in;
+ have = next != Z_NULL ? strm->avail_in : 0;
+ hold = 0;
+ bits = 0;
+ put = state->window;
+ left = state->wsize;
+
+ /* Inflate until end of block marked as last */
+ for (;;)
+ switch (state->mode) {
+ case TYPE:
+ /* determine and dispatch block type */
+ if (state->last) {
+ BYTEBITS();
+ state->mode = DONE;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {
+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+
+ case STORED:
+ /* get and verify stored block length */
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+
+ /* copy stored block from input to output */
+ while (state->length != 0) {
+ copy = state->length;
+ PULL();
+ ROOM();
+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+
+ case TABLE:
+ /* get dynamic table entries descriptor */
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {
+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+
+ /* get code length code lengths (not a typo) */
+ state->have = 0;
+ while (state->have < state->ncode) {
+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+
+ /* get length and distance code code lengths */
+ state->have = 0;
+ while (state->have < state->nlen + state->ndist) {
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {
+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {
+ if (this.val == 16) {
+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = (unsigned)(state->lens[state->have - 1]);
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {
+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {
+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+
+ case LEN:
+ /* use inflate_fast() if we have enough input and output */
+ if (have >= 6 && left >= 258) {
+ RESTORE();
+ inflate_fast(strm, state->wsize);
+ LOAD();
+ break;
+ }
+
+ /* get a literal, length, or end-of-block code */
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+
+ /* process literal */
+ if (this.op == 0) {
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ ROOM();
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ }
+
+ /* process end of block */
+ if (this.op & 32) {
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+
+ /* invalid code */
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+
+ /* length code -- get extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {
+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+
+ /* get distance code */
+ for (;;) {
+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+
+ /* get distance extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {
+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ if (state->offset > state->wsize) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+
+ /* copy match from window to output */
+ do {
+ ROOM();
+ copy = state->wsize - state->offset;
+ if (copy < left) {
+ from = put + copy;
+ copy = left - copy;
+ }
+ else {
+ from = put - state->offset;
+ copy = left;
+ }
+ if (copy > state->length) copy = state->length;
+ state->length -= copy;
+ left -= copy;
+ do {
+ *put++ = *from++;
+ } while (--copy);
+ } while (state->length != 0);
+ break;
+
+ case DONE:
+ /* inflate stream terminated properly -- write leftover output */
+ ret = Z_STREAM_END;
+ if (left < state->wsize) {
+ if (out(out_desc, state->window, state->wsize - left))
+ ret = Z_BUF_ERROR;
+ }
+ goto leave;
+
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto leave;
+
+ default: /* can't happen, but makes compilers happy */
+ ret = Z_STREAM_ERROR;
+ goto leave;
+ }
+
+ /* Return unused input */
+ leave:
+ strm->next_in = next;
+ strm->avail_in = have;
+ return ret;
+}
+
+int ZEXPORT inflateBackEnd(strm)
+z_stream FAR *strm;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
+++ /dev/null
-/* infblock.c -- interpret and process block types to last block
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "infblock.h"
-#include "inftrees.h"
-#include "infcodes.h"
-#include "infutil.h"
-
-struct inflate_codes_state {int dummy;}; /* for buggy compilers */
-
-/* simplify the use of the inflate_huft type with some defines */
-#define exop word.what.Exop
-#define bits word.what.Bits
-
-/* Table for deflate from PKZIP's appnote.txt. */
-local const uInt border[] = { /* Order of the bit length code lengths */
- 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
-/*
- Notes beyond the 1.93a appnote.txt:
-
- 1. Distance pointers never point before the beginning of the output
- stream.
- 2. Distance pointers can point back across blocks, up to 32k away.
- 3. There is an implied maximum of 7 bits for the bit length table and
- 15 bits for the actual data.
- 4. If only one code exists, then it is encoded using one bit. (Zero
- would be more efficient, but perhaps a little confusing.) If two
- codes exist, they are coded using one bit each (0 and 1).
- 5. There is no way of sending zero distance codes--a dummy must be
- sent if there are none. (History: a pre 2.0 version of PKZIP would
- store blocks with no distance codes, but this was discovered to be
- too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
- zero distance codes, which is sent as one code of zero bits in
- length.
- 6. There are up to 286 literal/length codes. Code 256 represents the
- end-of-block. Note however that the static length tree defines
- 288 codes just to fill out the Huffman codes. Codes 286 and 287
- cannot be used though, since there is no length base or extra bits
- defined for them. Similarily, there are up to 30 distance codes.
- However, static trees define 32 codes (all 5 bits) to fill out the
- Huffman codes, but the last two had better not show up in the data.
- 7. Unzip can check dynamic Huffman blocks for complete code sets.
- The exception is that a single code would not be complete (see #4).
- 8. The five bits following the block type is really the number of
- literal codes sent minus 257.
- 9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
- (1+6+6). Therefore, to output three times the length, you output
- three codes (1+1+1), whereas to output four times the same length,
- you only need two codes (1+3). Hmm.
- 10. In the tree reconstruction algorithm, Code = Code + Increment
- only if BitLength(i) is not zero. (Pretty obvious.)
- 11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
- 12. Note: length code 284 can represent 227-258, but length code 285
- really is 258. The last length deserves its own, short code
- since it gets used a lot in very redundant files. The length
- 258 is special since 258 - 3 (the min match length) is 255.
- 13. The literal/length and distance code bit lengths are read as a
- single stream of lengths. It is possible (and advantageous) for
- a repeat code (16, 17, or 18) to go across the boundary between
- the two sets of lengths.
- */
-
-
-void inflate_blocks_reset(s, z, c)
-inflate_blocks_statef *s;
-z_streamp z;
-uLongf *c;
-{
- if (c != Z_NULL)
- *c = s->check;
- if (s->mode == BTREE || s->mode == DTREE)
- ZFREE(z, s->sub.trees.blens);
- if (s->mode == CODES)
- inflate_codes_free(s->sub.decode.codes, z);
- s->mode = TYPE;
- s->bitk = 0;
- s->bitb = 0;
- s->read = s->write = s->window;
- if (s->checkfn != Z_NULL)
- z->adler = s->check = (*s->checkfn)(0L, (const Bytef *)Z_NULL, 0);
- Tracev((stderr, "inflate: blocks reset\n"));
-}
-
-
-inflate_blocks_statef *inflate_blocks_new(z, c, w)
-z_streamp z;
-check_func c;
-uInt w;
-{
- inflate_blocks_statef *s;
-
- if ((s = (inflate_blocks_statef *)ZALLOC
- (z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
- return s;
- if ((s->hufts =
- (inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL)
- {
- ZFREE(z, s);
- return Z_NULL;
- }
- if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
- {
- ZFREE(z, s->hufts);
- ZFREE(z, s);
- return Z_NULL;
- }
- s->end = s->window + w;
- s->checkfn = c;
- s->mode = TYPE;
- Tracev((stderr, "inflate: blocks allocated\n"));
- inflate_blocks_reset(s, z, Z_NULL);
- return s;
-}
-
-
-int inflate_blocks(s, z, r)
-inflate_blocks_statef *s;
-z_streamp z;
-int r;
-{
- uInt t; /* temporary storage */
- uLong b; /* bit buffer */
- uInt k; /* bits in bit buffer */
- Bytef *p; /* input data pointer */
- uInt n; /* bytes available there */
- Bytef *q; /* output window write pointer */
- uInt m; /* bytes to end of window or read pointer */
-
- /* copy input/output information to locals (UPDATE macro restores) */
- LOAD
-
- /* process input based on current state */
- while (1) switch (s->mode)
- {
- case TYPE:
- NEEDBITS(3)
- t = (uInt)b & 7;
- s->last = t & 1;
- switch (t >> 1)
- {
- case 0: /* stored */
- Tracev((stderr, "inflate: stored block%s\n",
- s->last ? " (last)" : ""));
- DUMPBITS(3)
- t = k & 7; /* go to byte boundary */
- DUMPBITS(t)
- s->mode = LENS; /* get length of stored block */
- break;
- case 1: /* fixed */
- Tracev((stderr, "inflate: fixed codes block%s\n",
- s->last ? " (last)" : ""));
- {
- uInt bl, bd;
- inflate_huft *tl, *td;
-
- inflate_trees_fixed(&bl, &bd, &tl, &td, z);
- s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
- if (s->sub.decode.codes == Z_NULL)
- {
- r = Z_MEM_ERROR;
- LEAVE
- }
- }
- DUMPBITS(3)
- s->mode = CODES;
- break;
- case 2: /* dynamic */
- Tracev((stderr, "inflate: dynamic codes block%s\n",
- s->last ? " (last)" : ""));
- DUMPBITS(3)
- s->mode = TABLE;
- break;
- case 3: /* illegal */
- DUMPBITS(3)
- s->mode = BAD;
- z->msg = (char*)"invalid block type";
- r = Z_DATA_ERROR;
- LEAVE
- }
- break;
- case LENS:
- NEEDBITS(32)
- if ((((~b) >> 16) & 0xffff) != (b & 0xffff))
- {
- s->mode = BAD;
- z->msg = (char*)"invalid stored block lengths";
- r = Z_DATA_ERROR;
- LEAVE
- }
- s->sub.left = (uInt)b & 0xffff;
- b = k = 0; /* dump bits */
- Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
- s->mode = s->sub.left ? STORED : (s->last ? DRY : TYPE);
- break;
- case STORED:
- if (n == 0)
- LEAVE
- NEEDOUT
- t = s->sub.left;
- if (t > n) t = n;
- if (t > m) t = m;
- zmemcpy(q, p, t);
- p += t; n -= t;
- q += t; m -= t;
- if ((s->sub.left -= t) != 0)
- break;
- Tracev((stderr, "inflate: stored end, %lu total out\n",
- z->total_out + (q >= s->read ? q - s->read :
- (s->end - s->read) + (q - s->window))));
- s->mode = s->last ? DRY : TYPE;
- break;
- case TABLE:
- NEEDBITS(14)
- s->sub.trees.table = t = (uInt)b & 0x3fff;
-#ifndef PKZIP_BUG_WORKAROUND
- if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
- {
- s->mode = BAD;
- z->msg = (char*)"too many length or distance symbols";
- r = Z_DATA_ERROR;
- LEAVE
- }
-#endif
- t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
- if ((s->sub.trees.blens = (uIntf*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
- {
- r = Z_MEM_ERROR;
- LEAVE
- }
- DUMPBITS(14)
- s->sub.trees.index = 0;
- Tracev((stderr, "inflate: table sizes ok\n"));
- s->mode = BTREE;
- case BTREE:
- while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
- {
- NEEDBITS(3)
- s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
- DUMPBITS(3)
- }
- while (s->sub.trees.index < 19)
- s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
- s->sub.trees.bb = 7;
- t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
- &s->sub.trees.tb, s->hufts, z);
- if (t != Z_OK)
- {
- r = t;
- if (r == Z_DATA_ERROR)
- {
- ZFREE(z, s->sub.trees.blens);
- s->mode = BAD;
- }
- LEAVE
- }
- s->sub.trees.index = 0;
- Tracev((stderr, "inflate: bits tree ok\n"));
- s->mode = DTREE;
- case DTREE:
- while (t = s->sub.trees.table,
- s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
- {
- inflate_huft *h;
- uInt i, j, c;
-
- t = s->sub.trees.bb;
- NEEDBITS(t)
- h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
- t = h->bits;
- c = h->base;
- if (c < 16)
- {
- DUMPBITS(t)
- s->sub.trees.blens[s->sub.trees.index++] = c;
- }
- else /* c == 16..18 */
- {
- i = c == 18 ? 7 : c - 14;
- j = c == 18 ? 11 : 3;
- NEEDBITS(t + i)
- DUMPBITS(t)
- j += (uInt)b & inflate_mask[i];
- DUMPBITS(i)
- i = s->sub.trees.index;
- t = s->sub.trees.table;
- if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
- (c == 16 && i < 1))
- {
- ZFREE(z, s->sub.trees.blens);
- s->mode = BAD;
- z->msg = (char*)"invalid bit length repeat";
- r = Z_DATA_ERROR;
- LEAVE
- }
- c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
- do {
- s->sub.trees.blens[i++] = c;
- } while (--j);
- s->sub.trees.index = i;
- }
- }
- s->sub.trees.tb = Z_NULL;
- {
- uInt bl, bd;
- inflate_huft *tl, *td;
- inflate_codes_statef *c;
-
- bl = 9; /* must be <= 9 for lookahead assumptions */
- bd = 6; /* must be <= 9 for lookahead assumptions */
- t = s->sub.trees.table;
- t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
- s->sub.trees.blens, &bl, &bd, &tl, &td,
- s->hufts, z);
- if (t != Z_OK)
- {
- if (t == (uInt)Z_DATA_ERROR)
- {
- ZFREE(z, s->sub.trees.blens);
- s->mode = BAD;
- }
- r = t;
- LEAVE
- }
- Tracev((stderr, "inflate: trees ok\n"));
- if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
- {
- r = Z_MEM_ERROR;
- LEAVE
- }
- s->sub.decode.codes = c;
- }
- ZFREE(z, s->sub.trees.blens);
- s->mode = CODES;
- case CODES:
- UPDATE
- if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
- return inflate_flush(s, z, r);
- r = Z_OK;
- inflate_codes_free(s->sub.decode.codes, z);
- LOAD
- Tracev((stderr, "inflate: codes end, %lu total out\n",
- z->total_out + (q >= s->read ? q - s->read :
- (s->end - s->read) + (q - s->window))));
- if (!s->last)
- {
- s->mode = TYPE;
- break;
- }
- s->mode = DRY;
- case DRY:
- FLUSH
- if (s->read != s->write)
- LEAVE
- s->mode = DONE;
- case DONE:
- r = Z_STREAM_END;
- LEAVE
- case BAD:
- r = Z_DATA_ERROR;
- LEAVE
- default:
- r = Z_STREAM_ERROR;
- LEAVE
- }
-}
-
-
-int inflate_blocks_free(s, z)
-inflate_blocks_statef *s;
-z_streamp z;
-{
- inflate_blocks_reset(s, z, Z_NULL);
- ZFREE(z, s->window);
- ZFREE(z, s->hufts);
- ZFREE(z, s);
- Tracev((stderr, "inflate: blocks freed\n"));
- return Z_OK;
-}
-
-
-void inflate_set_dictionary(s, d, n)
-inflate_blocks_statef *s;
-const Bytef *d;
-uInt n;
-{
- zmemcpy(s->window, d, n);
- s->read = s->write = s->window + n;
-}
-
-
-/* Returns true if inflate is currently at the end of a block generated
- * by Z_SYNC_FLUSH or Z_FULL_FLUSH.
- * IN assertion: s != Z_NULL
- */
-int inflate_blocks_sync_point(s)
-inflate_blocks_statef *s;
-{
- return s->mode == LENS;
-}
+++ /dev/null
-/* infblock.h -- header to use infblock.c
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-struct inflate_blocks_state;
-typedef struct inflate_blocks_state FAR inflate_blocks_statef;
-
-extern inflate_blocks_statef * inflate_blocks_new OF((
- z_streamp z,
- check_func c, /* check function */
- uInt w)); /* window size */
-
-extern int inflate_blocks OF((
- inflate_blocks_statef *,
- z_streamp ,
- int)); /* initial return code */
-
-extern void inflate_blocks_reset OF((
- inflate_blocks_statef *,
- z_streamp ,
- uLongf *)); /* check value on output */
-
-extern int inflate_blocks_free OF((
- inflate_blocks_statef *,
- z_streamp));
-
-extern void inflate_set_dictionary OF((
- inflate_blocks_statef *s,
- const Bytef *d, /* dictionary */
- uInt n)); /* dictionary length */
-
-extern int inflate_blocks_sync_point OF((
- inflate_blocks_statef *s));
+++ /dev/null
-/* infcodes.c -- process literals and length/distance pairs
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "infblock.h"
-#include "infcodes.h"
-#include "infutil.h"
-#include "inffast.h"
-
-/* simplify the use of the inflate_huft type with some defines */
-#define exop word.what.Exop
-#define bits word.what.Bits
-
-typedef enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
- START, /* x: set up for LEN */
- LEN, /* i: get length/literal/eob next */
- LENEXT, /* i: getting length extra (have base) */
- DIST, /* i: get distance next */
- DISTEXT, /* i: getting distance extra */
- COPY, /* o: copying bytes in window, waiting for space */
- LIT, /* o: got literal, waiting for output space */
- WASH, /* o: got eob, possibly still output waiting */
- END, /* x: got eob and all data flushed */
- BADCODE} /* x: got error */
-inflate_codes_mode;
-
-/* inflate codes private state */
-struct inflate_codes_state {
-
- /* mode */
- inflate_codes_mode mode; /* current inflate_codes mode */
-
- /* mode dependent information */
- uInt len;
- union {
- struct {
- inflate_huft *tree; /* pointer into tree */
- uInt need; /* bits needed */
- } code; /* if LEN or DIST, where in tree */
- uInt lit; /* if LIT, literal */
- struct {
- uInt get; /* bits to get for extra */
- uInt dist; /* distance back to copy from */
- } copy; /* if EXT or COPY, where and how much */
- } sub; /* submode */
-
- /* mode independent information */
- Byte lbits; /* ltree bits decoded per branch */
- Byte dbits; /* dtree bits decoder per branch */
- inflate_huft *ltree; /* literal/length/eob tree */
- inflate_huft *dtree; /* distance tree */
-
-};
-
-
-inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
-uInt bl, bd;
-inflate_huft *tl;
-inflate_huft *td; /* need separate declaration for Borland C++ */
-z_streamp z;
-{
- inflate_codes_statef *c;
-
- if ((c = (inflate_codes_statef *)
- ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
- {
- c->mode = START;
- c->lbits = (Byte)bl;
- c->dbits = (Byte)bd;
- c->ltree = tl;
- c->dtree = td;
- Tracev((stderr, "inflate: codes new\n"));
- }
- return c;
-}
-
-
-int inflate_codes(s, z, r)
-inflate_blocks_statef *s;
-z_streamp z;
-int r;
-{
- uInt j; /* temporary storage */
- inflate_huft *t; /* temporary pointer */
- uInt e; /* extra bits or operation */
- uLong b; /* bit buffer */
- uInt k; /* bits in bit buffer */
- Bytef *p; /* input data pointer */
- uInt n; /* bytes available there */
- Bytef *q; /* output window write pointer */
- uInt m; /* bytes to end of window or read pointer */
- Bytef *f; /* pointer to copy strings from */
- inflate_codes_statef *c = s->sub.decode.codes; /* codes state */
-
- /* copy input/output information to locals (UPDATE macro restores) */
- LOAD
-
- /* process input and output based on current state */
- while (1) switch (c->mode)
- { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
- case START: /* x: set up for LEN */
-#ifndef SLOW
- if (m >= 258 && n >= 10)
- {
- UPDATE
- r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
- LOAD
- if (r != Z_OK)
- {
- c->mode = r == Z_STREAM_END ? WASH : BADCODE;
- break;
- }
- }
-#endif /* !SLOW */
- c->sub.code.need = c->lbits;
- c->sub.code.tree = c->ltree;
- c->mode = LEN;
- case LEN: /* i: get length/literal/eob next */
- j = c->sub.code.need;
- NEEDBITS(j)
- t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
- DUMPBITS(t->bits)
- e = (uInt)(t->exop);
- if (e == 0) /* literal */
- {
- c->sub.lit = t->base;
- Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
- "inflate: literal '%c'\n" :
- "inflate: literal 0x%02x\n", t->base));
- c->mode = LIT;
- break;
- }
- if (e & 16) /* length */
- {
- c->sub.copy.get = e & 15;
- c->len = t->base;
- c->mode = LENEXT;
- break;
- }
- if ((e & 64) == 0) /* next table */
- {
- c->sub.code.need = e;
- c->sub.code.tree = t + t->base;
- break;
- }
- if (e & 32) /* end of block */
- {
- Tracevv((stderr, "inflate: end of block\n"));
- c->mode = WASH;
- break;
- }
- c->mode = BADCODE; /* invalid code */
- z->msg = (char*)"invalid literal/length code";
- r = Z_DATA_ERROR;
- LEAVE
- case LENEXT: /* i: getting length extra (have base) */
- j = c->sub.copy.get;
- NEEDBITS(j)
- c->len += (uInt)b & inflate_mask[j];
- DUMPBITS(j)
- c->sub.code.need = c->dbits;
- c->sub.code.tree = c->dtree;
- Tracevv((stderr, "inflate: length %u\n", c->len));
- c->mode = DIST;
- case DIST: /* i: get distance next */
- j = c->sub.code.need;
- NEEDBITS(j)
- t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
- DUMPBITS(t->bits)
- e = (uInt)(t->exop);
- if (e & 16) /* distance */
- {
- c->sub.copy.get = e & 15;
- c->sub.copy.dist = t->base;
- c->mode = DISTEXT;
- break;
- }
- if ((e & 64) == 0) /* next table */
- {
- c->sub.code.need = e;
- c->sub.code.tree = t + t->base;
- break;
- }
- c->mode = BADCODE; /* invalid code */
- z->msg = (char*)"invalid distance code";
- r = Z_DATA_ERROR;
- LEAVE
- case DISTEXT: /* i: getting distance extra */
- j = c->sub.copy.get;
- NEEDBITS(j)
- c->sub.copy.dist += (uInt)b & inflate_mask[j];
- DUMPBITS(j)
- Tracevv((stderr, "inflate: distance %u\n", c->sub.copy.dist));
- c->mode = COPY;
- case COPY: /* o: copying bytes in window, waiting for space */
- f = q - c->sub.copy.dist;
- while (f < s->window) /* modulo window size-"while" instead */
- f += s->end - s->window; /* of "if" handles invalid distances */
- while (c->len)
- {
- NEEDOUT
- OUTBYTE(*f++)
- if (f == s->end)
- f = s->window;
- c->len--;
- }
- c->mode = START;
- break;
- case LIT: /* o: got literal, waiting for output space */
- NEEDOUT
- OUTBYTE(c->sub.lit)
- c->mode = START;
- break;
- case WASH: /* o: got eob, possibly more output */
- if (k > 7) /* return unused byte, if any */
- {
- Assert(k < 16, "inflate_codes grabbed too many bytes")
- k -= 8;
- n++;
- p--; /* can always return one */
- }
- FLUSH
- if (s->read != s->write)
- LEAVE
- c->mode = END;
- case END:
- r = Z_STREAM_END;
- LEAVE
- case BADCODE: /* x: got error */
- r = Z_DATA_ERROR;
- LEAVE
- default:
- r = Z_STREAM_ERROR;
- LEAVE
- }
-#ifdef NEED_DUMMY_RETURN
- return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
-#endif
-}
-
-
-void inflate_codes_free(c, z)
-inflate_codes_statef *c;
-z_streamp z;
-{
- ZFREE(z, c);
- Tracev((stderr, "inflate: codes free\n"));
-}
+++ /dev/null
-/* infcodes.h -- header to use infcodes.c
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-struct inflate_codes_state;
-typedef struct inflate_codes_state FAR inflate_codes_statef;
-
-extern inflate_codes_statef *inflate_codes_new OF((
- uInt, uInt,
- inflate_huft *, inflate_huft *,
- z_streamp ));
-
-extern int inflate_codes OF((
- inflate_blocks_statef *,
- z_streamp ,
- int));
-
-extern void inflate_codes_free OF((
- inflate_codes_statef *,
- z_streamp ));
-
-/* inffast.c -- process literals and length/distance pairs fast
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+/* inffast.c -- fast decoding
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
-#include "infblock.h"
-#include "infcodes.h"
-#include "infutil.h"
+#include "inflate.h"
#include "inffast.h"
-struct inflate_codes_state {int dummy;}; /* for buggy compilers */
+/* Allow machine dependent optimization for post-increment or pre-increment.
+ Based on testing to date,
+ Pre-increment preferred for:
+ - PowerPC G3 (Adler)
+ - MIPS R5000 (Randers-Pehrson)
+ Post-increment preferred for:
+ - none
+ No measurable difference:
+ - Pentium III (Anderson)
+ */
+#ifdef POSTINC
+# define OFF 0
+# define PUP(a) *(a)++
+#else
+# define OFF 1
+# define PUP(a) *++(a)
+#endif
-/* simplify the use of the inflate_huft type with some defines */
-#define exop word.what.Exop
-#define bits word.what.Bits
+/*
+ Decode literal, length, and distance codes and write out the resulting
+ literal and match bytes until either not enough input or output is
+ available, an end-of-block is encountered, or a data error is encountered.
+ When large enough input and output buffers are supplied to inflate(), for
+ example, a 16K input buffer and a 64K output buffer, more than 95% of the
+ inflate execution time is spent in this routine.
-/* macros for bit input with no checking and for returning unused bytes */
-#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
-#define UNGRAB {c=z->avail_in-n;c=(k>>3)<c?k>>3:c;n+=c;p-=c;k-=c<<3;}
+ Entry assumptions:
-/* Called with number of bytes left to write in window at least 258
- (the maximum string length) and number of input bytes available
- at least ten. The ten bytes are six bytes for the longest length/
- distance pair plus four bytes for overloading the bit buffer. */
+ state->mode == LEN
+ strm->avail_in >= 6
+ strm->avail_out >= 258
+ start >= strm->avail_out
+ state->bits < 8
-int inflate_fast(bl, bd, tl, td, s, z)
-uInt bl, bd;
-inflate_huft *tl;
-inflate_huft *td; /* need separate declaration for Borland C++ */
-inflate_blocks_statef *s;
-z_streamp z;
-{
- inflate_huft *t; /* temporary pointer */
- uInt e; /* extra bits or operation */
- uLong b; /* bit buffer */
- uInt k; /* bits in bit buffer */
- Bytef *p; /* input data pointer */
- uInt n; /* bytes available there */
- Bytef *q; /* output window write pointer */
- uInt m; /* bytes to end of window or read pointer */
- uInt ml; /* mask for literal/length tree */
- uInt md; /* mask for distance tree */
- uInt c; /* bytes to copy */
- uInt d; /* distance back to copy from */
- Bytef *r; /* copy source pointer */
+ On return, state->mode is one of:
- /* load input, output, bit values */
- LOAD
+ LEN -- ran out of enough output space or enough available input
+ TYPE -- reached end of block code, inflate() to interpret next block
+ BAD -- error in block data
- /* initialize masks */
- ml = inflate_mask[bl];
- md = inflate_mask[bd];
+ Notes:
- /* do until not enough input or output space for fast loop */
- do { /* assume called with m >= 258 && n >= 10 */
- /* get literal/length code */
- GRABBITS(20) /* max bits for literal/length code */
- if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
- {
- DUMPBITS(t->bits)
- Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
- "inflate: * literal '%c'\n" :
- "inflate: * literal 0x%02x\n", t->base));
- *q++ = (Byte)t->base;
- m--;
- continue;
- }
- do {
- DUMPBITS(t->bits)
- if (e & 16)
- {
- /* get extra bits for length */
- e &= 15;
- c = t->base + ((uInt)b & inflate_mask[e]);
- DUMPBITS(e)
- Tracevv((stderr, "inflate: * length %u\n", c));
+ - The maximum input bits used by a length/distance pair is 15 bits for the
+ length code, 5 bits for the length extra, 15 bits for the distance code,
+ and 13 bits for the distance extra. This totals 48 bits, or six bytes.
+ Therefore if strm->avail_in >= 6, then there is enough input to avoid
+ checking for available input while decoding.
+
+ - The maximum bytes that a single length/distance pair can output is 258
+ bytes, which is the maximum length that can be coded. inflate_fast()
+ requires strm->avail_out >= 258 for each loop to avoid checking for
+ output space.
+ */
+void inflate_fast(strm, start)
+z_streamp strm;
+unsigned start; /* inflate()'s starting value for strm->avail_out */
+{
+ struct inflate_state FAR *state;
+ unsigned char FAR *in; /* local strm->next_in */
+ unsigned char FAR *last; /* while in < last, enough input available */
+ unsigned char FAR *out; /* local strm->next_out */
+ unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
+ unsigned char FAR *end; /* while out < end, enough space available */
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
+ unsigned long hold; /* local strm->hold */
+ unsigned bits; /* local strm->bits */
+ code const FAR *lcode; /* local strm->lencode */
+ code const FAR *dcode; /* local strm->distcode */
+ unsigned lmask; /* mask for first level of length codes */
+ unsigned dmask; /* mask for first level of distance codes */
+ code this; /* retrieved table entry */
+ unsigned op; /* code bits, operation, extra bits, or */
+ /* window position, window bytes to copy */
+ unsigned len; /* match length, unused bytes */
+ unsigned dist; /* match distance */
+ unsigned char FAR *from; /* where to copy match from */
- /* decode distance base of block to copy */
- GRABBITS(15); /* max bits for distance code */
- e = (t = td + ((uInt)b & md))->exop;
- do {
- DUMPBITS(t->bits)
- if (e & 16)
- {
- /* get extra bits to add to distance base */
- e &= 15;
- GRABBITS(e) /* get extra bits (up to 13) */
- d = t->base + ((uInt)b & inflate_mask[e]);
- DUMPBITS(e)
- Tracevv((stderr, "inflate: * distance %u\n", d));
+ /* copy state to local variables */
+ state = (struct inflate_state FAR *)strm->state;
+ in = strm->next_in - OFF;
+ last = in + (strm->avail_in - 5);
+ out = strm->next_out - OFF;
+ beg = out - (start - strm->avail_out);
+ end = out + (strm->avail_out - 257);
+ wsize = state->wsize;
+ write = state->write;
+ window = state->window;
+ hold = state->hold;
+ bits = state->bits;
+ lcode = state->lencode;
+ dcode = state->distcode;
+ lmask = (1U << state->lenbits) - 1;
+ dmask = (1U << state->distbits) - 1;
- /* do the copy */
- m -= c;
- r = q - d;
- if (r < s->window) /* wrap if needed */
- {
- do {
- r += s->end - s->window; /* force pointer in window */
- } while (r < s->window); /* covers invalid distances */
- e = s->end - r;
- if (c > e)
- {
- c -= e; /* wrapped copy */
- do {
- *q++ = *r++;
- } while (--e);
- r = s->window;
- do {
- *q++ = *r++;
- } while (--c);
- }
- else /* normal copy */
- {
- *q++ = *r++; c--;
- *q++ = *r++; c--;
- do {
- *q++ = *r++;
- } while (--c);
- }
+ /* decode literals and length/distances until end-of-block or not enough
+ input data or output space */
+ do {
+ if (bits < 15) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ this = lcode[hold & lmask];
+ dolen:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op == 0) { /* literal */
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ PUP(out) = (unsigned char)(this.val);
+ }
+ else if (op & 16) { /* length base */
+ len = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (op) {
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ len += hold & ((1U << op) - 1);
+ hold >>= op;
+ bits -= op;
+ }
+ Tracevv((stderr, "inflate: length %u\n", len));
+ if (bits < 15) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
}
- else /* normal copy */
- {
- *q++ = *r++; c--;
- *q++ = *r++; c--;
- do {
- *q++ = *r++;
- } while (--c);
+ this = dcode[hold & dmask];
+ dodist:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op & 16) { /* distance base */
+ dist = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ }
+ dist += hold & ((1U << op) - 1);
+ hold >>= op;
+ bits -= op;
+ Tracevv((stderr, "inflate: distance %u\n", dist));
+ op = (unsigned)(out - beg); /* max distance in output */
+ if (dist > op) { /* see if copy from window */
+ if (dist > wsize) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ from = window - OFF;
+ op = dist - op; /* distance back in window */
+ if (write == 0) { /* very common case */
+ from += wsize - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ else if (write < op) { /* wrap around window */
+ from += wsize + write - op;
+ op -= write;
+ if (op < len) { /* some from end of window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = window - OFF;
+ if (write < len) { /* some from start of window */
+ op = write;
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ }
+ else { /* contiguous in window */
+ from += write - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ while (len > 2) {
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ }
+ if (len) {
+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
+ else {
+ from = out - dist; /* copy direct from output */
+ do { /* minimum length is three */
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ } while (len > 2);
+ if (len) {
+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
}
+ else if ((op & 64) == 0) { /* 2nd level distance code */
+ this = dcode[this.val + (hold & ((1U << op) - 1))];
+ goto dodist;
+ }
+ else {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ }
+ else if ((op & 64) == 0) { /* 2nd level length code */
+ this = lcode[this.val + (hold & ((1U << op) - 1))];
+ goto dolen;
+ }
+ else if (op & 32) { /* end-of-block */
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
break;
- }
- else if ((e & 64) == 0)
- {
- t += t->base;
- e = (t += ((uInt)b & inflate_mask[e]))->exop;
- }
- else
- {
- z->msg = (char*)"invalid distance code";
- UNGRAB
- UPDATE
- return Z_DATA_ERROR;
- }
- } while (1);
- break;
- }
- if ((e & 64) == 0)
- {
- t += t->base;
- if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0)
- {
- DUMPBITS(t->bits)
- Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
- "inflate: * literal '%c'\n" :
- "inflate: * literal 0x%02x\n", t->base));
- *q++ = (Byte)t->base;
- m--;
- break;
}
- }
- else if (e & 32)
- {
- Tracevv((stderr, "inflate: * end of block\n"));
- UNGRAB
- UPDATE
- return Z_STREAM_END;
- }
- else
- {
- z->msg = (char*)"invalid literal/length code";
- UNGRAB
- UPDATE
- return Z_DATA_ERROR;
- }
- } while (1);
- } while (m >= 258 && n >= 10);
+ else {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ } while (in < last && out < end);
+
+ /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+ len = bits >> 3;
+ in -= len;
+ bits -= len << 3;
+ hold &= (1U << bits) - 1;
- /* not enough input or output--restore pointers and return */
- UNGRAB
- UPDATE
- return Z_OK;
+ /* update state and return */
+ strm->next_in = in + OFF;
+ strm->next_out = out + OFF;
+ strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
+ strm->avail_out = (unsigned)(out < end ?
+ 257 + (end - out) : 257 - (out - end));
+ state->hold = hold;
+ state->bits = bits;
+ return;
}
+
+/*
+ inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
+ - Using bit fields for code structure
+ - Different op definition to avoid & for extra bits (do & for table bits)
+ - Three separate decoding do-loops for direct, window, and write == 0
+ - Special case for distance > 1 copies to do overlapped load and store copy
+ - Explicit branch predictions (based on measured branch probabilities)
+ - Deferring match copy and interspersed it with decoding subsequent codes
+ - Swapping literal/length else
+ - Swapping window/direct else
+ - Larger unrolled copy loops (three is about right)
+ - Moving len -= 3 statement into middle of loop
+ */
/* inffast.h -- header to use inffast.c
- * Copyright (C) 1995-2002 Mark Adler
+ * Copyright (C) 1995-2003 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
subject to change. Applications should only use zlib.h.
*/
-extern int inflate_fast OF((
- uInt,
- uInt,
- inflate_huft *,
- inflate_huft *,
- inflate_blocks_statef *,
- z_streamp ));
+void inflate_fast OF((z_streamp strm, unsigned start));
-/* inffixed.h -- table for decoding fixed codes
- * Generated automatically by the maketree.c program
- */
+ /* inffixed.h -- table for decoding fixed codes
+ * Generated automatically by makefixed().
+ */
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
+ /* WARNING: this file should *not* be used by applications. It
+ is part of the implementation of the compression library and
+ is subject to change. Applications should only use zlib.h.
+ */
-local uInt fixed_bl = 9;
-local uInt fixed_bd = 5;
-local inflate_huft fixed_tl[] = {
- {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
- {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192},
- {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160},
- {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224},
- {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144},
- {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208},
- {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176},
- {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240},
- {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
- {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200},
- {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168},
- {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232},
- {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152},
- {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216},
- {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184},
- {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248},
- {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
- {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196},
- {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164},
- {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228},
- {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148},
- {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212},
- {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180},
- {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244},
- {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
- {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204},
- {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172},
- {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236},
- {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156},
- {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220},
- {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188},
- {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252},
- {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
- {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194},
- {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162},
- {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226},
- {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146},
- {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210},
- {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178},
- {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242},
- {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
- {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202},
- {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170},
- {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234},
- {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154},
- {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218},
- {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186},
- {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250},
- {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
- {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198},
- {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166},
- {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230},
- {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150},
- {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214},
- {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182},
- {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246},
- {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
- {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206},
- {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174},
- {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238},
- {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158},
- {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222},
- {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190},
- {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254},
- {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
- {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193},
- {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161},
- {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225},
- {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145},
- {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209},
- {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177},
- {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241},
- {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
- {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201},
- {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169},
- {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233},
- {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153},
- {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217},
- {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185},
- {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249},
- {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
- {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197},
- {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165},
- {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229},
- {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149},
- {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213},
- {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181},
- {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245},
- {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
- {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205},
- {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173},
- {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237},
- {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157},
- {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221},
- {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189},
- {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253},
- {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
- {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195},
- {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163},
- {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227},
- {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147},
- {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211},
- {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179},
- {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243},
- {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
- {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203},
- {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171},
- {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235},
- {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155},
- {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219},
- {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187},
- {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251},
- {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
- {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199},
- {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167},
- {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231},
- {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151},
- {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215},
- {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183},
- {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247},
- {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
- {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207},
- {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175},
- {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239},
- {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159},
- {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223},
- {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191},
- {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
- };
-local inflate_huft fixed_td[] = {
- {{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
- {{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
- {{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
- {{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
- {{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
- {{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
- {{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
- {{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
- };
+ static const code lenfix[512] = {
+ {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
+ {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
+ {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
+ {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
+ {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
+ {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
+ {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
+ {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
+ {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
+ {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
+ {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
+ {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
+ {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
+ {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
+ {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
+ {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
+ {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
+ {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
+ {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
+ {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
+ {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
+ {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
+ {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
+ {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
+ {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
+ {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
+ {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
+ {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
+ {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
+ {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
+ {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
+ {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
+ {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
+ {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
+ {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
+ {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
+ {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
+ {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
+ {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
+ {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
+ {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
+ {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
+ {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
+ {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
+ {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
+ {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
+ {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
+ {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
+ {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
+ {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
+ {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
+ {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
+ {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
+ {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
+ {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
+ {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
+ {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
+ {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
+ {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
+ {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
+ {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
+ {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
+ {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
+ {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
+ {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
+ {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
+ {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
+ {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
+ {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
+ {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
+ {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
+ {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
+ {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
+ {0,9,255}
+ };
+
+ static const code distfix[32] = {
+ {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
+ {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
+ {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
+ {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
+ {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
+ {22,5,193},{64,5,0}
+ };
-/* inflate.c -- zlib interface to inflate modules
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+/* inflate.c -- zlib decompression
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * Change history:
+ *
+ * 1.2.beta0 24 Nov 2002
+ * - First version -- complete rewrite of inflate to simplify code, avoid
+ * creation of window when not needed, minimize use of window when it is
+ * needed, make inffast.c even faster, implement gzip decoding, and to
+ * improve code readability and style over the previous zlib inflate code
+ *
+ * 1.2.beta1 25 Nov 2002
+ * - Use pointers for available input and output checking in inffast.c
+ * - Remove input and output counters in inffast.c
+ * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
+ * - Remove unnecessary second byte pull from length extra in inffast.c
+ * - Unroll direct copy to three copies per loop in inffast.c
+ *
+ * 1.2.beta2 4 Dec 2002
+ * - Change external routine names to reduce potential conflicts
+ * - Correct filename to inffixed.h for fixed tables in inflate.c
+ * - Make hbuf[] unsigned char to match parameter type in inflate.c
+ * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
+ * to avoid negation problem on Alphas (64 bit) in inflate.c
+ *
+ * 1.2.beta3 22 Dec 2002
+ * - Add comments on state->bits assertion in inffast.c
+ * - Add comments on op field in inftrees.h
+ * - Fix bug in reuse of allocated window after inflateReset()
+ * - Remove bit fields--back to byte structure for speed
+ * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
+ * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
+ * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
+ * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
+ * - Use local copies of stream next and avail values, as well as local bit
+ * buffer and bit count in inflate()--for speed when inflate_fast() not used
+ *
+ * 1.2.beta4 1 Jan 2003
+ * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
+ * - Move a comment on output buffer sizes from inffast.c to inflate.c
+ * - Add comments in inffast.c to introduce the inflate_fast() routine
+ * - Rearrange window copies in inflate_fast() for speed and simplification
+ * - Unroll last copy for window match in inflate_fast()
+ * - Use local copies of window variables in inflate_fast() for speed
+ * - Pull out common write == 0 case for speed in inflate_fast()
+ * - Make op and len in inflate_fast() unsigned for consistency
+ * - Add FAR to lcode and dcode declarations in inflate_fast()
+ * - Simplified bad distance check in inflate_fast()
+ * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
+ * source file infback.c to provide a call-back interface to inflate for
+ * programs like gzip and unzip -- uses window as output buffer to avoid
+ * window copying
+ *
+ * 1.2.beta5 1 Jan 2003
+ * - Improved inflateBack() interface to allow the caller to provide initial
+ * input in strm.
+ * - Fixed stored blocks bug in inflateBack()
+ *
+ * 1.2.beta6 4 Jan 2003
+ * - Added comments in inffast.c on effectiveness of POSTINC
+ * - Typecasting all around to reduce compiler warnings
+ * - Changed loops from while (1) or do {} while (1) to for (;;), again to
+ * make compilers happy
+ * - Changed type of window in inflateBackInit() to unsigned char *
+ *
+ * 1.2.beta7 27 Jan 2003
+ * - Changed many types to unsigned or unsigned short to avoid warnings
+ * - Added inflateCopy() function
+ *
+ * 1.2.0 9 Mar 2003
+ * - Changed inflateBack() interface to provide separate opaque descriptors
+ * for the in() and out() functions
+ * - Changed inflateBack() argument and in_func typedef to swap the length
+ * and buffer address return values for the input function
+ * - Check next_in and next_out for Z_NULL on entry to inflate()
+ *
+ * Remainder of change history is in ChangeLog in zlib distribution.
*/
#include "zutil.h"
-#include "infblock.h"
-
-struct inflate_blocks_state {int dummy;}; /* for buggy compilers */
-
-typedef enum {
- METHOD, /* waiting for method byte */
- FLAG, /* waiting for flag byte */
- DICT4, /* four dictionary check bytes to go */
- DICT3, /* three dictionary check bytes to go */
- DICT2, /* two dictionary check bytes to go */
- DICT1, /* one dictionary check byte to go */
- DICT0, /* waiting for inflateSetDictionary */
- BLOCKS, /* decompressing blocks */
- CHECK4, /* four check bytes to go */
- CHECK3, /* three check bytes to go */
- CHECK2, /* two check bytes to go */
- CHECK1, /* one check byte to go */
- DONE, /* finished check, done */
- BAD} /* got an error--stay here */
-inflate_mode;
-
-/* inflate private state */
-struct internal_state {
-
- /* mode */
- inflate_mode mode; /* current inflate mode */
-
- /* mode dependent information */
- union {
- uInt method; /* if FLAGS, method byte */
- struct {
- uLong was; /* computed check value */
- uLong need; /* stream check value */
- } check; /* if CHECK, check values to compare */
- uInt marker; /* if BAD, inflateSync's marker bytes count */
- } sub; /* submode */
-
- /* mode independent information */
- int nowrap; /* flag for no wrapper */
- uInt wbits; /* log2(window size) (8..15, defaults to 15) */
- inflate_blocks_statef
- *blocks; /* current inflate_blocks state */
-
-};
-
-
-int ZEXPORT inflateReset(z)
-z_streamp z;
-{
- if (z == Z_NULL || z->state == Z_NULL)
- return Z_STREAM_ERROR;
- z->total_in = z->total_out = 0;
- z->msg = Z_NULL;
- z->state->mode = z->state->nowrap ? BLOCKS : METHOD;
- inflate_blocks_reset(z->state->blocks, z, Z_NULL);
- Tracev((stderr, "inflate: reset\n"));
- return Z_OK;
-}
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+#ifdef MAKEFIXED
+# ifndef BUILDFIXED
+# define BUILDFIXED
+# endif
+#endif
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+local int updatewindow OF((z_streamp strm, unsigned out));
+#ifdef BUILDFIXED
+ void makefixed OF((void));
+#endif
+local unsigned syncsearch OF((unsigned *have, unsigned char FAR *buf,
+ unsigned len));
-int ZEXPORT inflateEnd(z)
-z_streamp z;
+int ZEXPORT inflateReset(strm)
+z_streamp strm;
{
- if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
- return Z_STREAM_ERROR;
- if (z->state->blocks != Z_NULL)
- inflate_blocks_free(z->state->blocks, z);
- ZFREE(z, z->state);
- z->state = Z_NULL;
- Tracev((stderr, "inflate: end\n"));
- return Z_OK;
-}
+ struct inflate_state FAR *state;
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ strm->total_in = strm->total_out = state->total = 0;
+ strm->msg = Z_NULL;
+ state->mode = HEAD;
+ state->last = 0;
+ state->havedict = 0;
+ state->wsize = 0;
+ state->hold = 0;
+ state->bits = 0;
+ state->lencode = state->distcode = state->next = state->codes;
+ Tracev((stderr, "inflate: reset\n"));
+ return Z_OK;
+}
-int ZEXPORT inflateInit2_(z, w, version, stream_size)
-z_streamp z;
-int w;
+int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
+z_streamp strm;
+int windowBits;
const char *version;
int stream_size;
{
- if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
- stream_size != sizeof(z_stream))
- return Z_VERSION_ERROR;
-
- /* initialize state */
- if (z == Z_NULL)
- return Z_STREAM_ERROR;
- z->msg = Z_NULL;
- if (z->zalloc == Z_NULL)
- {
- z->zalloc = zcalloc;
- z->opaque = (voidpf)0;
- }
- if (z->zfree == Z_NULL) z->zfree = zcfree;
- if ((z->state = (struct internal_state FAR *)
- ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
- return Z_MEM_ERROR;
- z->state->blocks = Z_NULL;
-
- /* handle undocumented nowrap option (no zlib header or check) */
- z->state->nowrap = 0;
- if (w < 0)
- {
- w = - w;
- z->state->nowrap = 1;
- }
-
- /* set window size */
- if (w < 8 || w > 15)
- {
- inflateEnd(z);
- return Z_STREAM_ERROR;
- }
- z->state->wbits = (uInt)w;
-
- /* create inflate_blocks state */
- if ((z->state->blocks =
- inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, (uInt)1 << w))
- == Z_NULL)
- {
- inflateEnd(z);
- return Z_MEM_ERROR;
- }
- Tracev((stderr, "inflate: allocated\n"));
-
- /* reset state */
- inflateReset(z);
- return Z_OK;
-}
+ struct inflate_state FAR *state;
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL) return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == Z_NULL) {
+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == Z_NULL) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)
+ ZALLOC(strm, 1, sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (voidpf)state;
+ if (windowBits < 0) {
+ state->wrap = 0;
+ windowBits = -windowBits;
+ }
+ else
+ state->wrap = 1;
+ if (windowBits < 8 || windowBits > 15) {
+ ZFREE(strm, state);
+ strm->state = Z_NULL;
+ return Z_STREAM_ERROR;
+ }
+ state->wbits = (unsigned)windowBits;
+ state->window = Z_NULL;
+ return inflateReset(strm);
+}
-int ZEXPORT inflateInit_(z, version, stream_size)
-z_streamp z;
+int ZEXPORT inflateInit_(strm, version, stream_size)
+z_streamp strm;
const char *version;
int stream_size;
{
- return inflateInit2_(z, DEF_WBITS, version, stream_size);
+ return inflateInit2_(strm, DEF_WBITS, version, stream_size);
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{
+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
}
+#ifdef MAKEFIXED
+#include <stdio.h>
-#define NEEDBYTE {if(z->avail_in==0)return r;r=f;}
-#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
+/*
+ Write out the inffixed.h that is #include'd above. Defining MAKEFIXED also
+ defines BUILDFIXED, so the tables are built on the fly. makefixed() writes
+ those tables to stdout, which would be piped to inffixed.h. A small program
+ can simply call makefixed to do this:
-int ZEXPORT inflate(z, f)
-z_streamp z;
-int f;
+ void makefixed(void);
+
+ int main(void)
+ {
+ makefixed();
+ return 0;
+ }
+
+ Then that can be linked with zlib built with MAKEFIXED defined and run:
+
+ a.out > inffixed.h
+ */
+void makefixed()
{
- int r;
- uInt b;
-
- if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
- return Z_STREAM_ERROR;
- f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
- r = Z_BUF_ERROR;
- while (1) switch (z->state->mode)
- {
- case METHOD:
- NEEDBYTE
- if (((z->state->sub.method = NEXTBYTE) & 0xf) != Z_DEFLATED)
- {
- z->state->mode = BAD;
- z->msg = (char*)"unknown compression method";
- z->state->sub.marker = 5; /* can't try inflateSync */
- break;
- }
- if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
- {
- z->state->mode = BAD;
- z->msg = (char*)"invalid window size";
- z->state->sub.marker = 5; /* can't try inflateSync */
- break;
- }
- z->state->mode = FLAG;
- case FLAG:
- NEEDBYTE
- b = NEXTBYTE;
- if (((z->state->sub.method << 8) + b) % 31)
- {
- z->state->mode = BAD;
- z->msg = (char*)"incorrect header check";
- z->state->sub.marker = 5; /* can't try inflateSync */
- break;
- }
- Tracev((stderr, "inflate: zlib header ok\n"));
- if (!(b & PRESET_DICT))
- {
- z->state->mode = BLOCKS;
- break;
- }
- z->state->mode = DICT4;
- case DICT4:
- NEEDBYTE
- z->state->sub.check.need = (uLong)NEXTBYTE << 24;
- z->state->mode = DICT3;
- case DICT3:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE << 16;
- z->state->mode = DICT2;
- case DICT2:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE << 8;
- z->state->mode = DICT1;
- case DICT1:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE;
- z->adler = z->state->sub.check.need;
- z->state->mode = DICT0;
- return Z_NEED_DICT;
- case DICT0:
- z->state->mode = BAD;
- z->msg = (char*)"need dictionary";
- z->state->sub.marker = 0; /* can try inflateSync */
- return Z_STREAM_ERROR;
- case BLOCKS:
- r = inflate_blocks(z->state->blocks, z, r);
- if (r == Z_DATA_ERROR)
- {
- z->state->mode = BAD;
- z->state->sub.marker = 0; /* can try inflateSync */
- break;
- }
- if (r == Z_OK)
- r = f;
- if (r != Z_STREAM_END)
- return r;
- r = f;
- inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
- if (z->state->nowrap)
- {
- z->state->mode = DONE;
- break;
- }
- z->state->mode = CHECK4;
- case CHECK4:
- NEEDBYTE
- z->state->sub.check.need = (uLong)NEXTBYTE << 24;
- z->state->mode = CHECK3;
- case CHECK3:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE << 16;
- z->state->mode = CHECK2;
- case CHECK2:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE << 8;
- z->state->mode = CHECK1;
- case CHECK1:
- NEEDBYTE
- z->state->sub.check.need += (uLong)NEXTBYTE;
-
- if (z->state->sub.check.was != z->state->sub.check.need)
- {
- z->state->mode = BAD;
- z->msg = (char*)"incorrect data check";
- z->state->sub.marker = 5; /* can't try inflateSync */
+ unsigned low, size;
+ struct inflate_state state;
+
+ fixedtables(&state);
+ puts(" /* inffixed.h -- table for decoding fixed codes");
+ puts(" * Generated automatically by makefixed().");
+ puts(" */");
+ puts("");
+ puts(" /* WARNING: this file should *not* be used by applications.");
+ puts(" It is part of the implementation of this library and is");
+ puts(" subject to change. Applications should only use zlib.h.");
+ puts(" */");
+ puts("");
+ size = 1U << 9;
+ printf(" static const code lenfix[%u] = {", size);
+ low = 0;
+ for (;;) {
+ if ((low % 7) == 0) printf("\n ");
+ printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
+ state.lencode[low].val);
+ if (++low == size) break;
+ putchar(',');
+ }
+ puts("\n };");
+ size = 1U << 5;
+ printf("\n static const code distfix[%u] = {", size);
+ low = 0;
+ for (;;) {
+ if ((low % 6) == 0) printf("\n ");
+ printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
+ state.distcode[low].val);
+ if (++low == size) break;
+ putchar(',');
+ }
+ puts("\n };");
+}
+#endif /* MAKEFIXED */
+
+/*
+ Update the window with the last wsize (normally 32K) bytes written before
+ returning. If window does not exist yet, create it. This is only called
+ when a window is already in use, or when output has been written during this
+ inflate call, but the end of the deflate stream has not been reached yet.
+ It is also called to create a window for dictionary data when a dictionary
+ is loaded.
+
+ Providing output buffers larger than 32K to inflate() should provide a speed
+ advantage, since only the last 32K of output is copied to the sliding window
+ upon return from inflate(), and since all distances after the first 32K of
+ output will fall in the output data, making match copies simpler and faster.
+ The advantage may be dependent on the size of the processor's data caches.
+ */
+local int updatewindow(strm, out)
+z_streamp strm;
+unsigned out;
+{
+ struct inflate_state FAR *state;
+ unsigned copy, dist;
+
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* if it hasn't been done already, allocate space for the window */
+ if (state->window == Z_NULL) {
+ state->window = (unsigned char FAR *)
+ ZALLOC(strm, 1U << state->wbits,
+ sizeof(unsigned char));
+ if (state->window == Z_NULL) return 1;
+ }
+
+ /* if window not in use yet, initialize */
+ if (state->wsize == 0) {
+ state->wsize = 1U << state->wbits;
+ state->write = 0;
+ }
+
+ /* copy state->wsize or less output bytes into the circular window */
+ copy = out - strm->avail_out;
+ if (copy >= state->wsize) {
+ zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
+ state->write = 0;
+ }
+ else {
+ dist = state->wsize - state->write;
+ if (dist > copy) dist = copy;
+ zmemcpy(state->window + state->write, strm->next_out - copy, dist);
+ copy -= dist;
+ if (copy) {
+ zmemcpy(state->window, strm->next_out - copy, copy);
+ state->write = copy;
+ }
+ else {
+ state->write += dist;
+ if (state->write == state->wsize) state->write = 0;
+ }
+ }
+ return 0;
+}
+
+/* Macros for inflate(): */
+
+/* check function to use adler32() for zlib or crc32() for gzip */
+#ifdef GUNZIP
+# define UPDATE(check, buf, len) \
+ (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
+#else
+# define UPDATE(check, buf, len) adler32(check, buf, len)
+#endif
+
+/* check macros for header crc */
+#ifdef GUNZIP
+# define CRC2(check, word) \
+ do { \
+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ check = crc32(check, hbuf, 2); \
+ } while (0)
+
+# define CRC4(check, word) \
+ do { \
+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ hbuf[2] = (unsigned char)((word) >> 16); \
+ hbuf[3] = (unsigned char)((word) >> 24); \
+ check = crc32(check, hbuf, 4); \
+ } while (0)
+#endif
+
+/* Load registers with state in inflate() for speed */
+#define LOAD() \
+ do { \
+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Restore state from registers in inflate() */
+#define RESTORE() \
+ do { \
+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \
+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflate()
+ if there is no input available. */
+#define PULLBYTE() \
+ do { \
+ if (have == 0) goto leave; \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflate(). */
+#define NEEDBITS(n) \
+ do { \
+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \
+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \
+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Reverse the bytes in a 32-bit value */
+#define REVERSE(q) \
+ ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
+ (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+
+/*
+ inflate() uses a state machine to process as much input data and generate as
+ much output data as possible before returning. The state machine is
+ structured roughly as follows:
+
+ for (;;) switch (state) {
+ ...
+ case STATEn:
+ if (not enough input data or output space to make progress)
+ return;
+ ... make progress ...
+ state = STATEm;
break;
- }
- Tracev((stderr, "inflate: zlib check ok\n"));
- z->state->mode = DONE;
- case DONE:
- return Z_STREAM_END;
- case BAD:
- return Z_DATA_ERROR;
- default:
- return Z_STREAM_ERROR;
- }
-#ifdef NEED_DUMMY_RETURN
- return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
+ ...
+ }
+
+ so when inflate() is called again, the same case is attempted again, and
+ if the appropriate resources are provided, the machine proceeds to the
+ next state. The NEEDBITS() macro is usually the way the state evaluates
+ whether it can proceed or should return. NEEDBITS() does the return if
+ the requested bits are not available. The typical use of the BITS macros
+ is:
+
+ NEEDBITS(n);
+ ... do something with BITS(n) ...
+ DROPBITS(n);
+
+ where NEEDBITS(n) either returns from inflate() if there isn't enough
+ input left to load n bits into the accumulator, or it continues. BITS(n)
+ gives the low n bits in the accumulator. When done, DROPBITS(n) drops
+ the low n bits off the accumulator. INITBITS() clears the accumulator
+ and sets the number of available bits to zero. BYTEBITS() discards just
+ enough bits to put the accumulator on a byte boundary. After BYTEBITS()
+ and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
+
+ NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
+ if there is no input available. The decoding of variable length codes uses
+ PULLBYTE() directly in order to pull just enough bytes to decode the next
+ code, and no more.
+
+ Some states loop until they get enough input, making sure that enough
+ state information is maintained to continue the loop where it left off
+ if NEEDBITS() returns in the loop. For example, want, need, and keep
+ would all have to actually be part of the saved state in case NEEDBITS()
+ returns:
+
+ case STATEw:
+ while (want < need) {
+ NEEDBITS(n);
+ keep[want++] = BITS(n);
+ DROPBITS(n);
+ }
+ state = STATEx;
+ case STATEx:
+
+ As shown above, if the next state is also the next case, then the break
+ is omitted.
+
+ A state may also return if there is not enough output space available to
+ complete that state. Those states are copying stored data, writing a
+ literal byte, and copying a matching string.
+
+ When returning, a "goto leave" is used to update the total counters, update
+ the check value, and determine whether any progress has been made during
+ that inflate() call in order to return the proper return code. Progress is
+ defined as a change in either strm->avail_in or strm->avail_out. When there
+ is a window, goto leave will update the window with the last output written.
+ If a goto leave occurs in the middle of decompression and there is no window
+ currently, goto leave will create one and copy output to the window for the
+ next call of inflate().
+
+ In this implementation, the flush parameter of inflate() only affects the
+ return code (per zlib.h). inflate() always writes as much as possible to
+ strm->next_out, given the space available and the provided input--the effect
+ documented in zlib.h of Z_SYNC_FLUSH. Furthermore, inflate() always defers
+ the allocation of and copying into a sliding window until necessary, which
+ provides the effect documented in zlib.h for Z_FINISH when the entire input
+ stream available. So the only thing the flush parameter actually does is:
+ when flush is set to Z_FINISH, inflate() cannot return Z_OK. Instead it
+ will return Z_BUF_ERROR if it has not reached the end of the stream.
+ */
+
+int ZEXPORT inflate(strm, flush)
+z_streamp strm;
+int flush;
+{
+ struct inflate_state FAR *state;
+ unsigned char *next, *put; /* next input and output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned in, out; /* save starting available input and output */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+#ifdef GUNZIP
+ unsigned char hbuf[4]; /* buffer for gzip header crc calculation */
+#endif
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+ (strm->next_in == Z_NULL && strm->avail_in != 0))
+ return Z_STREAM_ERROR;
+
+ state = (struct inflate_state FAR *)strm->state;
+ LOAD();
+ in = have;
+ out = left;
+ ret = Z_OK;
+ for (;;)
+ switch (state->mode) {
+ case HEAD:
+ if (state->wrap == 0) {
+ state->mode = TYPE;
+ break;
+ }
+ NEEDBITS(16);
+#ifdef GUNZIP
+ if (hold == 0x8b1f) { /* gzip header */
+ state->check = crc32(0L, Z_NULL, 0);
+ CRC2(state->check, hold);
+ INITBITS();
+ state->mode = FLAGS;
+ break;
+ }
+ state->flags = 0; /* expect zlib header */
+#endif
+ if (((BITS(8) << 8) + (hold >> 8)) % 31) {
+ strm->msg = (char *)"incorrect header check";
+ state->mode = BAD;
+ break;
+ }
+ if (BITS(4) != Z_DEFLATED) {
+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ DROPBITS(4);
+ if (BITS(4) + 8 > state->wbits) {
+ strm->msg = (char *)"invalid window size";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: zlib header ok\n"));
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = hold & 0x200 ? DICTID : TYPE;
+ INITBITS();
+ break;
+#ifdef GUNZIP
+ case FLAGS:
+ NEEDBITS(16);
+ state->flags = (int)(hold);
+ if ((state->flags & 0xff) != Z_DEFLATED) {
+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ if (state->flags & 0xe000) {
+ strm->msg = (char *)"unknown header flags set";
+ state->mode = BAD;
+ break;
+ }
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = TIME;
+ case TIME:
+ NEEDBITS(32);
+ if (state->flags & 0x0200) CRC4(state->check, hold);
+ INITBITS();
+ state->mode = OS;
+ case OS:
+ NEEDBITS(16);
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = EXLEN;
+ case EXLEN:
+ if (state->flags & 0x0400) {
+ NEEDBITS(16);
+ state->length = (unsigned)(hold);
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ }
+ state->mode = EXTRA;
+ case EXTRA:
+ if (state->flags & 0x0400) {
+ copy = state->length;
+ if (copy > have) copy = have;
+ if (copy) {
+ if (state->flags & 0x0200)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ state->length -= copy;
+ }
+ if (state->length) goto leave;
+ }
+ state->mode = NAME;
+ case NAME:
+ if (state->flags & 0x0800) {
+ if (have == 0) goto leave;
+ copy = 0;
+ do {
+ len = (unsigned)(next[copy++]);
+ } while (len && copy < have);
+ if (state->flags & 0x02000)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto leave;
+ }
+ state->mode = COMMENT;
+ case COMMENT:
+ if (state->flags & 0x1000) {
+ if (have == 0) goto leave;
+ copy = 0;
+ do {
+ len = (unsigned)(next[copy++]);
+ } while (len && copy < have);
+ if (state->flags & 0x02000)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto leave;
+ }
+ state->mode = HCRC;
+ case HCRC:
+ if (state->flags & 0x0200) {
+ NEEDBITS(16);
+ if (hold != (state->check & 0xffff)) {
+ strm->msg = (char *)"header crc mismatch";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ }
+ strm->adler = state->check = crc32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ break;
+#endif
+ case DICTID:
+ NEEDBITS(32);
+ strm->adler = state->check = REVERSE(hold);
+ INITBITS();
+ state->mode = DICT;
+ case DICT:
+ if (state->havedict == 0) {
+ RESTORE();
+ return Z_NEED_DICT;
+ }
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ case TYPE:
+ if (state->last) {
+ BYTEBITS();
+ state->mode = CHECK;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {
+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+ case STORED:
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+ state->mode = COPY;
+ case COPY:
+ copy = state->length;
+ if (copy) {
+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ if (copy == 0) goto leave;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ break;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+ case TABLE:
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {
+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+ state->have = 0;
+ state->mode = LENLENS;
+ case LENLENS:
+ while (state->have < state->ncode) {
+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+ state->have = 0;
+ state->mode = CODELENS;
+ case CODELENS:
+ while (state->have < state->nlen + state->ndist) {
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {
+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {
+ if (this.val == 16) {
+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = state->lens[state->have - 1];
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {
+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {
+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+ case LEN:
+ if (have >= 6 && left >= 258) {
+ RESTORE();
+ inflate_fast(strm, out);
+ LOAD();
+ break;
+ }
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+ if ((int)(this.op) == 0) {
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ state->mode = LIT;
+ break;
+ }
+ if (this.op & 32) {
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = LENEXT;
+ case LENEXT:
+ if (state->extra) {
+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+ state->mode = DIST;
+ case DIST:
+ for (;;) {
+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = DISTEXT;
+ case DISTEXT:
+ if (state->extra) {
+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ if (state->offset > (state->wsize ? state->wsize :
+ out - left)) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+ state->mode = MATCH;
+ case MATCH:
+ if (left == 0) goto leave;
+ copy = out - left;
+ if (state->offset > copy) { /* copy from window */
+ copy = state->offset - copy;
+ if (copy > state->write) {
+ copy -= state->write;
+ from = state->window + (state->wsize - copy);
+ }
+ else
+ from = state->window + (state->write - copy);
+ if (copy > state->length) copy = state->length;
+ }
+ else { /* copy from output */
+ from = put - state->offset;
+ copy = state->length;
+ }
+ if (copy > left) copy = left;
+ left -= copy;
+ state->length -= copy;
+ do {
+ *put++ = *from++;
+ } while (--copy);
+ if (state->length == 0) state->mode = LEN;
+ break;
+ case LIT:
+ if (left == 0) goto leave;
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ case CHECK:
+ if (state->wrap) {
+ NEEDBITS(32);
+ out -= left;
+ strm->total_out += out;
+ state->total += out;
+ if (out)
+ strm->adler = state->check =
+ UPDATE(state->check, put - out, out);
+ out = left;
+ if ((
+#ifdef GUNZIP
+ state->flags ? hold :
#endif
+ REVERSE(hold)) != state->check) {
+ strm->msg = (char *)"incorrect data check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: check matches trailer\n"));
+ }
+#ifdef GUNZIP
+ state->mode = LENGTH;
+ case LENGTH:
+ if (state->wrap && state->flags) {
+ NEEDBITS(32);
+ if (hold != (state->total & 0xffffffff)) {
+ strm->msg = (char *)"incorrect length check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: length matches trailer\n"));
+ }
+#endif
+ state->mode = DONE;
+ case DONE:
+ ret = Z_STREAM_END;
+ goto leave;
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto leave;
+ case MEM:
+ return Z_MEM_ERROR;
+ case SYNC:
+ default:
+ return Z_STREAM_ERROR;
+ }
+
+ /*
+ Return from inflate(), updating the total counts and the check value.
+ If there was no progress during the inflate() call, return a buffer
+ error. Call updatewindow() to create and/or update the window state.
+ Note: a memory error from inflate() is non-recoverable.
+ */
+ leave:
+ RESTORE();
+ if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
+ if (updatewindow(strm, out)) {
+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ in -= strm->avail_in;
+ out -= strm->avail_out;
+ strm->total_in += in;
+ strm->total_out += out;
+ state->total += out;
+ if (state->wrap && out)
+ strm->adler = state->check =
+ UPDATE(state->check, strm->next_out - out, out);
+ if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
+ ret = Z_BUF_ERROR;
+ return ret;
}
+int ZEXPORT inflateEnd(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->window != Z_NULL) ZFREE(strm, state->window);
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
-int ZEXPORT inflateSetDictionary(z, dictionary, dictLength)
-z_streamp z;
+int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
+z_streamp strm;
const Bytef *dictionary;
-uInt dictLength;
+uInt dictLength;
{
- uInt length = dictLength;
-
- if (z == Z_NULL || z->state == Z_NULL || z->state->mode != DICT0)
- return Z_STREAM_ERROR;
-
- if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
- z->adler = 1L;
-
- if (length >= ((uInt)1<<z->state->wbits))
- {
- length = (1<<z->state->wbits)-1;
- dictionary += dictLength - length;
- }
- inflate_set_dictionary(z->state->blocks, dictionary, length);
- z->state->mode = BLOCKS;
- return Z_OK;
-}
+ struct inflate_state FAR *state;
+ unsigned long id;
+ /* check state */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->mode != DICT) return Z_STREAM_ERROR;
-int ZEXPORT inflateSync(z)
-z_streamp z;
-{
- uInt n; /* number of bytes to look at */
- Bytef *p; /* pointer to bytes */
- uInt m; /* number of marker bytes found in a row */
- uLong r, w; /* temporaries to save total_in and total_out */
-
- /* set up */
- if (z == Z_NULL || z->state == Z_NULL)
- return Z_STREAM_ERROR;
- if (z->state->mode != BAD)
- {
- z->state->mode = BAD;
- z->state->sub.marker = 0;
- }
- if ((n = z->avail_in) == 0)
- return Z_BUF_ERROR;
- p = z->next_in;
- m = z->state->sub.marker;
-
- /* search */
- while (n && m < 4)
- {
- static const Byte mark[4] = {0, 0, 0xff, 0xff};
- if (*p == mark[m])
- m++;
- else if (*p)
- m = 0;
+ /* check for correct dictionary id */
+ id = adler32(0L, Z_NULL, 0);
+ id = adler32(id, dictionary, dictLength);
+ if (id != state->check) return Z_DATA_ERROR;
+
+ /* copy dictionary to window */
+ if (updatewindow(strm, strm->avail_out)) {
+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ if (dictLength > state->wsize)
+ zmemcpy(state->window, dictionary + dictLength - state->wsize,
+ state->wsize);
else
- m = 4 - m;
- p++, n--;
- }
-
- /* restore */
- z->total_in += p - z->next_in;
- z->next_in = p;
- z->avail_in = n;
- z->state->sub.marker = m;
-
- /* return no joy or set up to restart on a new block */
- if (m != 4)
- return Z_DATA_ERROR;
- r = z->total_in; w = z->total_out;
- inflateReset(z);
- z->total_in = r; z->total_out = w;
- z->state->mode = BLOCKS;
- return Z_OK;
+ zmemcpy(state->window + state->wsize - dictLength, dictionary,
+ dictLength);
+ state->havedict = 1;
+ Tracev((stderr, "inflate: dictionary set\n"));
+ return Z_OK;
}
+/*
+ Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found
+ or when out of input. When called, *have is the number of pattern bytes
+ found in order so far, in 0..3. On return *have is updated to the new
+ state. If on return *have equals four, then the pattern was found and the
+ return value is how many bytes were read including the last byte of the
+ pattern. If *have is less than four, then the pattern has not been found
+ yet and the return value is len. In the latter case, syncsearch() can be
+ called again with more data and the *have state. *have is initialized to
+ zero for the first call.
+ */
+local unsigned syncsearch(have, buf, len)
+unsigned *have;
+unsigned char FAR *buf;
+unsigned len;
+{
+ unsigned got;
+ unsigned next;
+
+ got = *have;
+ next = 0;
+ while (next < len && got < 4) {
+ if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
+ got++;
+ else if (buf[next])
+ got = 0;
+ else
+ got = 4 - got;
+ next++;
+ }
+ *have = got;
+ return next;
+}
+
+int ZEXPORT inflateSync(strm)
+z_streamp strm;
+{
+ unsigned len; /* number of bytes to look at or looked at */
+ unsigned long in, out; /* temporary to save total_in and total_out */
+ unsigned char buf[4]; /* to restore bit buffer to byte string */
+ struct inflate_state FAR *state;
-/* Returns true if inflate is currently at the end of a block generated
- * by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
- * implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
- * but removes the length bytes of the resulting empty stored block. When
- * decompressing, PPP checks that at the end of input packet, inflate is
- * waiting for these length bytes.
+ /* check parameters */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
+
+ /* if first time, start search in bit buffer */
+ if (state->mode != SYNC) {
+ state->mode = SYNC;
+ state->hold <<= state->bits & 7;
+ state->bits -= state->bits & 7;
+ len = 0;
+ while (state->bits >= 8) {
+ buf[len++] = (unsigned char)(state->hold);
+ state->hold >>= 8;
+ state->bits -= 8;
+ }
+ state->have = 0;
+ syncsearch(&(state->have), buf, len);
+ }
+
+ /* search available input */
+ len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
+ strm->avail_in -= len;
+ strm->next_in += len;
+ strm->total_in += len;
+
+ /* return no joy or set up to restart inflate() on a new block */
+ if (state->have != 4) return Z_DATA_ERROR;
+ in = strm->total_in; out = strm->total_out;
+ inflateReset(strm);
+ strm->total_in = in; strm->total_out = out;
+ state->mode = TYPE;
+ return Z_OK;
+}
+
+/*
+ Returns true if inflate is currently at the end of a block generated by
+ Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+ implementation to provide an additional safety check. PPP uses
+ Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
+ block. When decompressing, PPP checks that at the end of input packet,
+ inflate is waiting for these length bytes.
*/
-int ZEXPORT inflateSyncPoint(z)
-z_streamp z;
+int ZEXPORT inflateSyncPoint(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ return state->mode == STORED && state->bits == 0;
+}
+
+int ZEXPORT inflateCopy(dest, source)
+z_streamp dest;
+z_streamp source;
{
- if (z == Z_NULL || z->state == Z_NULL || z->state->blocks == Z_NULL)
- return Z_STREAM_ERROR;
- return inflate_blocks_sync_point(z->state->blocks);
+ struct inflate_state FAR *state;
+ struct inflate_state FAR *copy;
+ unsigned char FAR *window;
+
+ /* check input */
+ if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
+ source->zalloc == Z_NULL || source->zfree == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)source->state;
+
+ /* allocate space */
+ copy = (struct inflate_state FAR *)
+ ZALLOC(source, 1, sizeof(struct inflate_state));
+ if (copy == Z_NULL) return Z_MEM_ERROR;
+ window = Z_NULL;
+ if (state->window != Z_NULL) {
+ window = (unsigned char FAR *)
+ ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
+ if (window == Z_NULL) {
+ ZFREE(source, copy);
+ return Z_MEM_ERROR;
+ }
+ }
+
+ /* copy state */
+ *dest = *source;
+ *copy = *state;
+ copy->lencode = copy->codes + (state->lencode - state->codes);
+ copy->distcode = copy->codes + (state->distcode - state->codes);
+ copy->next = copy->codes + (state->next - state->codes);
+ if (window != Z_NULL)
+ zmemcpy(window, state->window, 1U << state->wbits);
+ copy->window = window;
+ dest->state = (voidpf)copy;
+ return Z_OK;
}
--- /dev/null
+/* inflate.h -- internal inflate state definition
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* define NO_GUNZIP when compiling if you want to disable gzip header and
+ trailer decoding by inflate(). NO_GUNZIP would be used to avoid linking in
+ the crc code when it is not needed. For shared libraries, gzip decoding
+ should be left enabled. */
+#ifndef NO_GUNZIP
+# define GUNZIP
+#endif
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {
+ HEAD, /* i: waiting for magic header */
+#ifdef GUNZIP
+ FLAGS, /* i: waiting for method and flags (gzip) */
+ TIME, /* i: waiting for modification time (gzip) */
+ OS, /* i: waiting for extra flags and operating system (gzip) */
+ EXLEN, /* i: waiting for extra length (gzip) */
+ EXTRA, /* i: waiting for extra bytes (gzip) */
+ NAME, /* i: waiting for end of file name (gzip) */
+ COMMENT, /* i: waiting for end of comment (gzip) */
+ HCRC, /* i: waiting for header crc (gzip) */
+#endif
+ DICTID, /* i: waiting for dictionary check value */
+ DICT, /* waiting for inflateSetDictionary() call */
+ TYPE, /* i: waiting for type bits, including last-flag bit */
+ STORED, /* i: waiting for stored size (length and complement) */
+ COPY, /* i/o: waiting for input or output to copy stored block */
+ TABLE, /* i: waiting for dynamic block table lengths */
+ LENLENS, /* i: waiting for code length code lengths */
+ CODELENS, /* i: waiting for length/lit and distance code lengths */
+ LEN, /* i: waiting for length/lit code */
+ LENEXT, /* i: waiting for length extra bits */
+ DIST, /* i: waiting for distance code */
+ DISTEXT, /* i: waiting for distance extra bits */
+ MATCH, /* o: waiting for output space to copy string */
+ LIT, /* o: waiting for output space to write literal */
+ CHECK, /* i: waiting for 32-bit check value */
+#ifdef GUNZIP
+ LENGTH, /* i: waiting for 32-bit length (gzip) */
+#endif
+ DONE, /* finished check, done -- remain here until reset */
+ BAD, /* got a data error -- remain here until reset */
+ MEM, /* got an inflate() memory error -- remain here until reset */
+ SYNC /* looking for synchronization bytes to restart inflate() */
+} inflate_mode;
+
+/*
+ State transitions between above modes -
+
+ (most modes can go to the BAD or MEM mode -- not shown for clarity)
+
+ Process header:
+ HEAD -> (gzip) or (zlib)
+ (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
+ NAME -> COMMENT -> HCRC -> TYPE
+ (zlib) -> DICTID or TYPE
+ DICTID -> DICT -> TYPE
+ Read deflate blocks:
+ TYPE -> STORED or TABLE or LEN or CHECK
+ STORED -> COPY -> TYPE
+ TABLE -> LENLENS -> CODELENS -> LEN
+ Read deflate codes:
+ LEN -> LENEXT or LIT or TYPE
+ LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
+ LIT -> LEN
+ Process trailer:
+ CHECK -> LENGTH -> DONE
+ */
+
+/* state maintained between inflate() calls. Approximately 7K bytes. */
+struct inflate_state {
+ inflate_mode mode; /* current inflate mode */
+ int last; /* true if processing last block */
+ int wrap; /* true to process header and trailer */
+ int havedict; /* true if dictionary provided */
+ int flags; /* gzip header method and flags (0 if zlib) */
+ unsigned long check; /* protected copy of check value */
+ unsigned long total; /* protected copy of output count */
+ /* sliding window */
+ unsigned wbits; /* log base 2 of requested window size */
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if needed */
+ /* bit accumulator */
+ unsigned long hold; /* input bit accumulator */
+ unsigned bits; /* number of bits in "in" */
+ /* for string and stored block copying */
+ unsigned length; /* literal or length of data to copy */
+ unsigned offset; /* distance back to copy string from */
+ /* for table and code decoding */
+ unsigned extra; /* extra bits needed */
+ /* fixed and dynamic code tables */
+ code const FAR *lencode; /* starting table for length/literal codes */
+ code const FAR *distcode; /* starting table for distance codes */
+ unsigned lenbits; /* index bits for lencode */
+ unsigned distbits; /* index bits for distcode */
+ /* dynamic table building */
+ unsigned ncode; /* number of code length code lengths */
+ unsigned nlen; /* number of length code lengths */
+ unsigned ndist; /* number of distance code lengths */
+ unsigned have; /* number of code lengths in lens[] */
+ code FAR *next; /* next available space in codes[] */
+ unsigned short lens[320]; /* temporary storage for code lengths */
+ unsigned short work[288]; /* work area for code table building */
+ code codes[ENOUGH]; /* space for code tables */
+};
/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
-#if !defined(BUILDFIXED) && !defined(STDC)
-# define BUILDFIXED /* non ANSI compilers may not accept inffixed.h */
-#endif
+#define MAXBITS 15
const char inflate_copyright[] =
- " inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
+ " inflate 1.2.0 Copyright 1995-2003 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
*/
-struct internal_state {int dummy;}; /* for buggy compilers */
-
-/* simplify the use of the inflate_huft type with some defines */
-#define exop word.what.Exop
-#define bits word.what.Bits
-
-
-local int huft_build OF((
- uIntf *, /* code lengths in bits */
- uInt, /* number of codes */
- uInt, /* number of "simple" codes */
- const uIntf *, /* list of base values for non-simple codes */
- const uIntf *, /* list of extra bits for non-simple codes */
- inflate_huft * FAR*,/* result: starting table */
- uIntf *, /* maximum lookup bits (returns actual) */
- inflate_huft *, /* space for trees */
- uInt *, /* hufts used in space */
- uIntf * )); /* space for values */
-
-/* Tables for deflate from PKZIP's appnote.txt. */
-local const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
- 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
- /* see note #13 above about 258 */
-local const uInt cplext[31] = { /* Extra bits for literal codes 257..285 */
- 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
- 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
-local const uInt cpdist[30] = { /* Copy offsets for distance codes 0..29 */
- 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
- 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
- 8193, 12289, 16385, 24577};
-local const uInt cpdext[30] = { /* Extra bits for distance codes */
- 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
- 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
- 12, 12, 13, 13};
/*
- Huffman code decoding is performed using a multi-level table lookup.
- The fastest way to decode is to simply build a lookup table whose
- size is determined by the longest code. However, the time it takes
- to build this table can also be a factor if the data being decoded
- is not very long. The most common codes are necessarily the
- shortest codes, so those codes dominate the decoding time, and hence
- the speed. The idea is you can have a shorter table that decodes the
- shorter, more probable codes, and then point to subsidiary tables for
- the longer codes. The time it costs to decode the longer codes is
- then traded against the time it takes to make longer tables.
-
- This results of this trade are in the variables lbits and dbits
- below. lbits is the number of bits the first level table for literal/
- length codes can decode in one step, and dbits is the same thing for
- the distance codes. Subsequent tables are also less than or equal to
- those sizes. These values may be adjusted either when all of the
- codes are shorter than that, in which case the longest code length in
- bits is used, or when the shortest code is *longer* than the requested
- table size, in which case the length of the shortest code in bits is
- used.
-
- There are two different values for the two tables, since they code a
- different number of possibilities each. The literal/length table
- codes 286 possible values, or in a flat code, a little over eight
- bits. The distance table codes 30 possible values, or a little less
- than five bits, flat. The optimum values for speed end up being
- about one bit more than those, so lbits is 8+1 and dbits is 5+1.
- The optimum values may differ though from machine to machine, and
- possibly even between compilers. Your mileage may vary.
+ Build a set of tables to decode the provided canonical Huffman code.
+ The code lengths are lens[0..codes-1]. The result starts at *table,
+ whose indices are 0..2^bits-1. work is a writable array of at least
+ lens shorts, which is used as a work area. type is the type of code
+ to be generated, CODES, LENS, or DISTS. On return, zero is success,
+ -1 is an invalid code, and +1 means that ENOUGH isn't enough. table
+ on return points to the next available entry's address. bits is the
+ requested root table index bits, and on return it is the actual root
+ table index bits. It will differ if the request is greater than the
+ longest code or if it is less than the shortest code.
*/
-
-
-/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
-#define BMAX 15 /* maximum bit length of any code */
-
-local int huft_build(b, n, s, d, e, t, m, hp, hn, v)
-uIntf *b; /* code lengths in bits (all assumed <= BMAX) */
-uInt n; /* number of codes (assumed <= 288) */
-uInt s; /* number of simple-valued codes (0..s-1) */
-const uIntf *d; /* list of base values for non-simple codes */
-const uIntf *e; /* list of extra bits for non-simple codes */
-inflate_huft * FAR *t; /* result: starting table */
-uIntf *m; /* maximum lookup bits, returns actual */
-inflate_huft *hp; /* space for trees */
-uInt *hn; /* hufts used in space */
-uIntf *v; /* working area: values in order of bit length */
-/* Given a list of code lengths and a maximum table size, make a set of
- tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
- if the given code set is incomplete (the tables are still built in this
- case), or Z_DATA_ERROR if the input is invalid. */
+int inflate_table(type, lens, codes, table, bits, work)
+codetype type;
+unsigned short FAR *lens;
+unsigned codes;
+code * FAR *table;
+unsigned *bits;
+unsigned short FAR *work;
{
+ unsigned len; /* a code's length in bits */
+ unsigned sym; /* index of code symbols */
+ unsigned min, max; /* minimum and maximum code lengths */
+ unsigned root; /* number of index bits for root table */
+ unsigned curr; /* number of index bits for current table */
+ unsigned drop; /* code bits to drop for sub-table */
+ int left; /* number of prefix codes available */
+ unsigned used; /* code entries in table used */
+ unsigned huff; /* Huffman code */
+ unsigned incr; /* for incrementing code, index */
+ unsigned fill; /* index for replicating entries */
+ unsigned low; /* low bits for current root entry */
+ unsigned mask; /* mask for low root bits */
+ code this; /* table entry for duplication */
+ code FAR *next; /* next available space in table */
+ const unsigned short *base; /* base value table to use */
+ const unsigned short *extra; /* extra bits table to use */
+ int end; /* use base and extra for symbol > end */
+ unsigned short count[MAXBITS+1]; /* number of codes of each length */
+ unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
+ static const unsigned short lbase[31] = { /* Length codes 257..285 base */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+ static const unsigned short lext[31] = { /* Length codes 257..285 extra */
+ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 73, 194};
+ static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577, 0, 0};
+ static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
+ 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
+ 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
+ 28, 28, 29, 29, 64, 64};
+
+ /*
+ Process a set of code lengths to create a canonical Huffman code. The
+ code lengths are lens[0..codes-1]. Each length corresponds to the
+ symbols 0..codes-1. The Huffman code is generated by first sorting the
+ symbols by length from short to long, and retaining the symbol order
+ for codes with equal lengths. Then the code starts with all zero bits
+ for the first code of the shortest length, and the codes are integer
+ increments for the same length, and zeros are appended as the length
+ increases. For the deflate format, these bits are stored backwards
+ from their more natural integer increment ordering, and so when the
+ decoding tables are built in the large loop below, the integer codes
+ are incremented backwards.
+
+ This routine assumes, but does not check, that all of the entries in
+ lens[] are in the range 0..MAXBITS. The caller must assure this.
+ 1..MAXBITS is interpreted as that code length. zero means that that
+ symbol does not occur in this code.
+
+ The codes are sorted by computing a count of codes for each length,
+ creating from that a table of starting indices for each length in the
+ sorted table, and then entering the symbols in order in the sorted
+ table. The sorted table is work[], with that space being provided by
+ the caller.
+
+ The length counts are used for other purposes as well, i.e. finding
+ the minimum and maximum length codes, determining if there are any
+ codes at all, checking for a valid set of lengths, and looking ahead
+ at length counts to determine sub-table sizes when building the
+ decoding tables.
+ */
+
+ /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+ for (len = 0; len <= MAXBITS; len++)
+ count[len] = 0;
+ for (sym = 0; sym < codes; sym++)
+ count[lens[sym]]++;
+
+ /* bound code lengths, force root to be within code lengths */
+ root = *bits;
+ for (max = MAXBITS; max >= 1; max--)
+ if (count[max] != 0) break;
+ if (root > max) root = max;
+ if (max == 0) return -1; /* no codes! */
+ for (min = 1; min <= MAXBITS; min++)
+ if (count[min] != 0) break;
+ if (root < min) root = min;
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1;
+ for (len = 1; len <= MAXBITS; len++) {
+ left <<= 1;
+ left -= count[len];
+ if (left < 0) return -1; /* over-subscribed */
+ }
+ if (left > 0 && (type == CODES || (codes - count[0] != 1)))
+ return -1; /* incomplete set */
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++)
+ offs[len + 1] = offs[len] + count[len];
+
+ /* sort symbols by length, by symbol order within each length */
+ for (sym = 0; sym < codes; sym++)
+ if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
+
+ /*
+ Create and fill in decoding tables. In this loop, the table being
+ filled is at next and has curr index bits. The code being used is huff
+ with length len. That code is converted to an index by dropping drop
+ bits off of the bottom. For codes where len is less than drop + curr,
+ those top drop + curr - len bits are incremented through all values to
+ fill the table with replicated entries.
+
+ root is the number of index bits for the root table. When len exceeds
+ root, sub-tables are created pointed to by the root entry with an index
+ of the low root bits of huff. This is saved in low to check for when a
+ new sub-table should be started. drop is zero when the root table is
+ being filled, and drop is root when sub-tables are being filled.
+
+ When a new sub-table is needed, it is necessary to look ahead in the
+ code lengths to determine what size sub-table is needed. The length
+ counts are used for this, and so count[] is decremented as codes are
+ entered in the tables.
+
+ used keeps track of how many table entries have been allocated from the
+ provided *table space. It is checked when a LENS table is being made
+ against the space in *table, ENOUGH, minus the maximum space needed by
+ the worst case distance code, MAXD. This should never happen, but the
+ sufficiency of ENOUGH has not been proven exhaustively, hence the check.
+ This assumes that when type == LENS, bits == 9.
+
+ sym increments through all symbols, and the loop terminates when
+ all codes of length max, i.e. all codes, have been processed. This
+ routine permits incomplete codes, so another loop after this one fills
+ in the rest of the decoding tables with invalid code markers.
+ */
+
+ /* set up for code type */
+ switch (type) {
+ case CODES:
+ base = extra = work; /* dummy value--not used */
+ end = 19;
+ break;
+ case LENS:
+ base = lbase;
+ base -= 257;
+ extra = lext;
+ extra -= 257;
+ end = 256;
+ break;
+ default: /* DISTS */
+ base = dbase;
+ extra = dext;
+ end = -1;
+ }
- uInt a; /* counter for codes of length k */
- uInt c[BMAX+1]; /* bit length count table */
- uInt f; /* i repeats in table every f entries */
- int g; /* maximum code length */
- int h; /* table level */
- register uInt i; /* counter, current code */
- register uInt j; /* counter */
- register int k; /* number of bits in current code */
- int l; /* bits per table (returned in m) */
- uInt mask; /* (1 << w) - 1, to avoid cc -O bug on HP */
- register uIntf *p; /* pointer into c[], b[], or v[] */
- inflate_huft *q; /* points to current table */
- struct inflate_huft_s r; /* table entry for structure assignment */
- inflate_huft *u[BMAX]; /* table stack */
- register int w; /* bits before this table == (l * h) */
- uInt x[BMAX+1]; /* bit offsets, then code stack */
- uIntf *xp; /* pointer into x */
- int y; /* number of dummy codes added */
- uInt z; /* number of entries in current table */
-
-
- /* Generate counts for each bit length */
- p = c;
-#define C0 *p++ = 0;
-#define C2 C0 C0 C0 C0
-#define C4 C2 C2 C2 C2
- C4 /* clear c[]--assume BMAX+1 is 16 */
- p = b; i = n;
- do {
- c[*p++]++; /* assume all entries <= BMAX */
- } while (--i);
- if (c[0] == n) /* null input--all zero length codes */
- {
- *t = (inflate_huft *)Z_NULL;
- *m = 0;
- return Z_OK;
- }
-
-
- /* Find minimum and maximum length, bound *m by those */
- l = *m;
- for (j = 1; j <= BMAX; j++)
- if (c[j])
- break;
- k = j; /* minimum code length */
- if ((uInt)l < j)
- l = j;
- for (i = BMAX; i; i--)
- if (c[i])
- break;
- g = i; /* maximum code length */
- if ((uInt)l > i)
- l = i;
- *m = l;
-
-
- /* Adjust last length count to fill out codes, if needed */
- for (y = 1 << j; j < i; j++, y <<= 1)
- if ((y -= c[j]) < 0)
- return Z_DATA_ERROR;
- if ((y -= c[i]) < 0)
- return Z_DATA_ERROR;
- c[i] += y;
-
-
- /* Generate starting offsets into the value table for each length */
- x[1] = j = 0;
- p = c + 1; xp = x + 2;
- while (--i) { /* note that i == g from above */
- *xp++ = (j += *p++);
- }
-
-
- /* Make a table of values in order of bit lengths */
- p = b; i = 0;
- do {
- if ((j = *p++) != 0)
- v[x[j]++] = i;
- } while (++i < n);
- n = x[g]; /* set n to length of v */
-
-
- /* Generate the Huffman codes and for each, make the table entries */
- x[0] = i = 0; /* first Huffman code is zero */
- p = v; /* grab values in bit order */
- h = -1; /* no tables yet--level -1 */
- w = -l; /* bits decoded == (l * h) */
- u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
- q = (inflate_huft *)Z_NULL; /* ditto */
- z = 0; /* ditto */
-
- /* go through the bit lengths (k already is bits in shortest code) */
- for (; k <= g; k++)
- {
- a = c[k];
- while (a--)
- {
- /* here i is the Huffman code of length k bits for value *p */
- /* make tables up to required level */
- while (k > w + l)
- {
- h++;
- w += l; /* previous table always l bits */
-
- /* compute minimum size table less than or equal to l bits */
- z = g - w;
- z = z > (uInt)l ? l : z; /* table size upper limit */
- if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
- { /* too few codes for k-w bit table */
- f -= a + 1; /* deduct codes from patterns left */
- xp = c + k;
- if (j < z)
- while (++j < z) /* try smaller tables up to z bits */
- {
- if ((f <<= 1) <= *++xp)
- break; /* enough codes to use up j bits */
- f -= *xp; /* else deduct codes from patterns */
- }
+ /* initialize state for loop */
+ huff = 0; /* starting code */
+ sym = 0; /* starting code symbol */
+ len = min; /* starting code length */
+ next = *table; /* current table to fill in */
+ curr = root; /* current table index bits */
+ drop = 0; /* current bits to drop from code for index */
+ low = (unsigned)(-1); /* trigger new sub-table when len > root */
+ used = 1U << root; /* use root table entries */
+ mask = used - 1; /* mask for comparing low */
+
+ /* check available table space */
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
+
+ /* process all codes and make table entries */
+ for (;;) {
+ /* create table entry */
+ this.bits = (unsigned char)(len - drop);
+ if ((int)(work[sym]) < end) {
+ this.op = (unsigned char)0;
+ this.val = work[sym];
}
- z = 1 << j; /* table entries for j-bit table */
-
- /* allocate new table */
- if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
- return Z_DATA_ERROR; /* overflow of MANY */
- u[h] = q = hp + *hn;
- *hn += z;
-
- /* connect to last table, if there is one */
- if (h)
- {
- x[h] = i; /* save pattern for backing up */
- r.bits = (Byte)l; /* bits to dump before this table */
- r.exop = (Byte)j; /* bits in this table */
- j = i >> (w - l);
- r.base = (uInt)(q - u[h-1] - j); /* offset to this table */
- u[h-1][j] = r; /* connect to last table */
+ else if ((int)(work[sym]) > end) {
+ this.op = (unsigned char)(extra[work[sym]]);
+ this.val = base[work[sym]];
+ }
+ else {
+ this.op = (unsigned char)(32 + 64); /* end of block */
+ this.val = 0;
}
- else
- *t = q; /* first table is returned result */
- }
-
- /* set up table entry in r */
- r.bits = (Byte)(k - w);
- if (p >= v + n)
- r.exop = 128 + 64; /* out of values--invalid code */
- else if (*p < s)
- {
- r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
- r.base = *p++; /* simple code is just the value */
- }
- else
- {
- r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
- r.base = d[*p++ - s];
- }
-
- /* fill code-like entries with r */
- f = 1 << (k - w);
- for (j = i >> w; j < z; j += f)
- q[j] = r;
-
- /* backwards increment the k-bit code i */
- for (j = 1 << (k - 1); i & j; j >>= 1)
- i ^= j;
- i ^= j;
-
- /* backup over finished tables */
- mask = (1 << w) - 1; /* needed on HP, cc -O bug */
- while ((i & mask) != x[h])
- {
- h--; /* don't need to update q */
- w -= l;
- mask = (1 << w) - 1;
- }
- }
- }
-
- /* Return Z_BUF_ERROR if we were given an incomplete table */
- return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
-}
+ /* replicate for those indices with low len bits equal to huff */
+ incr = 1U << (len - drop);
+ fill = 1U << curr;
+ do {
+ fill -= incr;
+ next[(huff >> drop) + fill] = this;
+ } while (fill != 0);
+
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {
+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
+ /* go to next symbol, update count, len */
+ sym++;
+ if (--(count[len]) == 0) {
+ if (len == max) break;
+ len = lens[work[sym]];
+ }
-int inflate_trees_bits(c, bb, tb, hp, z)
-uIntf *c; /* 19 code lengths */
-uIntf *bb; /* bits tree desired/actual depth */
-inflate_huft * FAR *tb; /* bits tree result */
-inflate_huft *hp; /* space for trees */
-z_streamp z; /* for messages */
-{
- int r;
- uInt hn = 0; /* hufts used in space */
- uIntf *v; /* work area for huft_build */
-
- if ((v = (uIntf*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
- return Z_MEM_ERROR;
- r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL,
- tb, bb, hp, &hn, v);
- if (r == Z_DATA_ERROR)
- z->msg = (char*)"oversubscribed dynamic bit lengths tree";
- else if (r == Z_BUF_ERROR || *bb == 0)
- {
- z->msg = (char*)"incomplete dynamic bit lengths tree";
- r = Z_DATA_ERROR;
- }
- ZFREE(z, v);
- return r;
-}
+ /* create new sub-table if needed */
+ if (len > root && (huff & mask) != low) {
+ /* if first time, transition to sub-tables */
+ if (drop == 0)
+ drop = root;
+
+ /* increment past last table */
+ next += 1U << curr;
+
+ /* determine length of next table */
+ curr = len - drop;
+ left = (int)(1 << curr);
+ while (curr + drop < max) {
+ left -= count[curr + drop];
+ if (left <= 0) break;
+ curr++;
+ left <<= 1;
+ }
+ /* check for enough space */
+ used += 1U << curr;
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
-int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, hp, z)
-uInt nl; /* number of literal/length codes */
-uInt nd; /* number of distance codes */
-uIntf *c; /* that many (total) code lengths */
-uIntf *bl; /* literal desired/actual bit depth */
-uIntf *bd; /* distance desired/actual bit depth */
-inflate_huft * FAR *tl; /* literal/length tree result */
-inflate_huft * FAR *td; /* distance tree result */
-inflate_huft *hp; /* space for trees */
-z_streamp z; /* for messages */
-{
- int r;
- uInt hn = 0; /* hufts used in space */
- uIntf *v; /* work area for huft_build */
-
- /* allocate work area */
- if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
- return Z_MEM_ERROR;
-
- /* build literal/length tree */
- r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
- if (r != Z_OK || *bl == 0)
- {
- if (r == Z_DATA_ERROR)
- z->msg = (char*)"oversubscribed literal/length tree";
- else if (r != Z_MEM_ERROR)
- {
- z->msg = (char*)"incomplete literal/length tree";
- r = Z_DATA_ERROR;
- }
- ZFREE(z, v);
- return r;
- }
-
- /* build distance tree */
- r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
- if (r != Z_OK || (*bd == 0 && nl > 257))
- {
- if (r == Z_DATA_ERROR)
- z->msg = (char*)"oversubscribed distance tree";
- else if (r == Z_BUF_ERROR) {
-#ifdef PKZIP_BUG_WORKAROUND
- r = Z_OK;
- }
-#else
- z->msg = (char*)"incomplete distance tree";
- r = Z_DATA_ERROR;
- }
- else if (r != Z_MEM_ERROR)
- {
- z->msg = (char*)"empty distance tree with lengths";
- r = Z_DATA_ERROR;
+ /* point entry in root table to sub-table */
+ low = huff & mask;
+ (*table)[low].op = (unsigned char)curr;
+ (*table)[low].bits = (unsigned char)root;
+ (*table)[low].val = (unsigned short)(next - *table);
+ }
}
- ZFREE(z, v);
- return r;
-#endif
- }
-
- /* done */
- ZFREE(z, v);
- return Z_OK;
-}
+ /*
+ Fill in rest of table for incomplete codes. This loop is similar to the
+ loop above in incrementing huff for table indices. It is assumed that
+ len is equal to curr + drop, so there is no loop needed to increment
+ through high index bits. When the current sub-table is filled, the loop
+ drops back to the root table to fill in any remaining entries there.
+ */
+ this.op = (unsigned char)64; /* invalid code marker */
+ this.bits = (unsigned char)(len - drop);
+ this.val = (unsigned short)0;
+ while (huff != 0) {
+ /* when done with sub-table, drop back to root table */
+ if (drop != 0 && (huff & mask) != low) {
+ drop = 0;
+ len = root;
+ next = *table;
+ curr = root;
+ this.bits = (unsigned char)len;
+ }
+
+ /* put invalid code marker in table */
+ next[huff >> drop] = this;
-/* build fixed tables only once--keep them here */
-#ifdef BUILDFIXED
-local int fixed_built = 0;
-#define FIXEDH 544 /* number of hufts used by fixed tables */
-local inflate_huft fixed_mem[FIXEDH];
-local uInt fixed_bl;
-local uInt fixed_bd;
-local inflate_huft *fixed_tl;
-local inflate_huft *fixed_td;
-#else
-#include "inffixed.h"
-#endif
-
-
-int inflate_trees_fixed(bl, bd, tl, td, z)
-uIntf *bl; /* literal desired/actual bit depth */
-uIntf *bd; /* distance desired/actual bit depth */
-inflate_huft * FAR *tl; /* literal/length tree result */
-inflate_huft * FAR *td; /* distance tree result */
-z_streamp z; /* for memory allocation */
-{
-#ifdef BUILDFIXED
- /* build fixed tables if not already */
- if (!fixed_built)
- {
- int k; /* temporary variable */
- uInt f = 0; /* number of hufts used in fixed_mem */
- uIntf *c; /* length list for huft_build */
- uIntf *v; /* work area for huft_build */
-
- /* allocate memory */
- if ((c = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
- return Z_MEM_ERROR;
- if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
- {
- ZFREE(z, c);
- return Z_MEM_ERROR;
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {
+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
}
- /* literal table */
- for (k = 0; k < 144; k++)
- c[k] = 8;
- for (; k < 256; k++)
- c[k] = 9;
- for (; k < 280; k++)
- c[k] = 7;
- for (; k < 288; k++)
- c[k] = 8;
- fixed_bl = 9;
- huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl,
- fixed_mem, &f, v);
-
- /* distance table */
- for (k = 0; k < 30; k++)
- c[k] = 5;
- fixed_bd = 5;
- huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd,
- fixed_mem, &f, v);
-
- /* done */
- ZFREE(z, v);
- ZFREE(z, c);
- fixed_built = 1;
- }
-#endif
- *bl = fixed_bl;
- *bd = fixed_bd;
- *tl = fixed_tl;
- *td = fixed_td;
- return Z_OK;
+ /* set return parameters */
+ *table += used;
+ *bits = root;
+ return 0;
}
/* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
subject to change. Applications should only use zlib.h.
*/
-/* Huffman code lookup table entry--this entry is four bytes for machines
- that have 16-bit pointers (e.g. PC's in the small or medium model). */
-
-typedef struct inflate_huft_s FAR inflate_huft;
-
-struct inflate_huft_s {
- union {
- struct {
- Byte Exop; /* number of extra bits or operation */
- Byte Bits; /* number of bits in this code or subcode */
- } what;
- uInt pad; /* pad structure to a power of 2 (4 bytes for */
- } word; /* 16-bit, 8 bytes for 32-bit int's) */
- uInt base; /* literal, length base, distance base,
- or table offset */
-};
+/* Structure for decoding tables. Each entry provides either the
+ information needed to do the operation requested by the code that
+ indexed that table entry, or it provides a pointer to another
+ table that indexes more bits of the code. op indicates whether
+ the entry is a pointer to another table, a literal, a length or
+ distance, an end-of-block, or an invalid code. For a table
+ pointer, the low four bits of op is the number of index bits of
+ that table. For a length or distance, the low four bits of op
+ is the number of extra bits to get after the code. bits is
+ the number of bits in this code or part of the code to drop off
+ of the bit buffer. val is the actual byte to output in the case
+ of a literal, the base length or distance, or the offset from
+ the current table to the next table. Each entry is four bytes. */
+typedef struct {
+ unsigned char op; /* operation, extra bits, table bits */
+ unsigned char bits; /* bits in this part of the code */
+ unsigned short val; /* offset in table or code value */
+} code;
+
+/* op values as set by inflate_table():
+ 00000000 - literal
+ 0000tttt - table link, tttt != 0 is the number of table index bits
+ 0001eeee - length or distance, eeee is the number of extra bits
+ 01100000 - end of block
+ 01000000 - invalid code
+ */
/* Maximum size of dynamic tree. The maximum found in a long but non-
- exhaustive search was 1004 huft structures (850 for length/literals
+ exhaustive search was 1004 code structures (850 for length/literals
and 154 for distances, the latter actually the result of an
- exhaustive search). The actual maximum is not known, but the
- value below is more than safe. */
-#define MANY 1440
-
-extern int inflate_trees_bits OF((
- uIntf *, /* 19 code lengths */
- uIntf *, /* bits tree desired/actual depth */
- inflate_huft * FAR *, /* bits tree result */
- inflate_huft *, /* space for trees */
- z_streamp)); /* for messages */
-
-extern int inflate_trees_dynamic OF((
- uInt, /* number of literal/length codes */
- uInt, /* number of distance codes */
- uIntf *, /* that many (total) code lengths */
- uIntf *, /* literal desired/actual bit depth */
- uIntf *, /* distance desired/actual bit depth */
- inflate_huft * FAR *, /* literal/length tree result */
- inflate_huft * FAR *, /* distance tree result */
- inflate_huft *, /* space for trees */
- z_streamp)); /* for messages */
-
-extern int inflate_trees_fixed OF((
- uIntf *, /* literal desired/actual bit depth */
- uIntf *, /* distance desired/actual bit depth */
- inflate_huft * FAR *, /* literal/length tree result */
- inflate_huft * FAR *, /* distance tree result */
- z_streamp)); /* for memory allocation */
+ exhaustive search). The true maximum is not known, but the value
+ below is more than safe. */
+#define ENOUGH 1440
+#define MAXD 154
+
+/* Type of code to build for inftable() */
+typedef enum {
+ CODES,
+ LENS,
+ DISTS
+} codetype;
+
+extern int inflate_table OF((codetype type, unsigned short FAR *lens,
+ unsigned codes, code * FAR *table, unsigned *bits,
+ unsigned short FAR *work));
+++ /dev/null
-/* inflate_util.c -- data and routines common to blocks and codes
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "infblock.h"
-#include "inftrees.h"
-#include "infcodes.h"
-#include "infutil.h"
-
-struct inflate_codes_state {int dummy;}; /* for buggy compilers */
-
-/* And'ing with mask[n] masks the lower n bits */
-uInt inflate_mask[17] = {
- 0x0000,
- 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
- 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
-};
-
-
-/* copy as much as possible from the sliding window to the output area */
-int inflate_flush(s, z, r)
-inflate_blocks_statef *s;
-z_streamp z;
-int r;
-{
- uInt n;
- Bytef *p;
- Bytef *q;
-
- /* local copies of source and destination pointers */
- p = z->next_out;
- q = s->read;
-
- /* compute number of bytes to copy as far as end of window */
- n = (uInt)((q <= s->write ? s->write : s->end) - q);
- if (n > z->avail_out) n = z->avail_out;
- if (n && r == Z_BUF_ERROR) r = Z_OK;
-
- /* update counters */
- z->avail_out -= n;
- z->total_out += n;
-
- /* update check information */
- if (s->checkfn != Z_NULL)
- z->adler = s->check = (*s->checkfn)(s->check, q, n);
-
- /* copy as far as end of window */
- zmemcpy(p, q, n);
- p += n;
- q += n;
-
- /* see if more to copy at beginning of window */
- if (q == s->end)
- {
- /* wrap pointers */
- q = s->window;
- if (s->write == s->end)
- s->write = s->window;
-
- /* compute bytes to copy */
- n = (uInt)(s->write - q);
- if (n > z->avail_out) n = z->avail_out;
- if (n && r == Z_BUF_ERROR) r = Z_OK;
-
- /* update counters */
- z->avail_out -= n;
- z->total_out += n;
-
- /* update check information */
- if (s->checkfn != Z_NULL)
- z->adler = s->check = (*s->checkfn)(s->check, q, n);
-
- /* copy */
- zmemcpy(p, q, n);
- p += n;
- q += n;
- }
-
- /* update pointers */
- z->next_out = p;
- s->read = q;
-
- /* done */
- return r;
-}
+++ /dev/null
-/* infutil.h -- types and macros common to blocks and codes
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-#ifndef _INFUTIL_H
-#define _INFUTIL_H
-
-typedef enum {
- TYPE, /* get type bits (3, including end bit) */
- LENS, /* get lengths for stored */
- STORED, /* processing stored block */
- TABLE, /* get table lengths */
- BTREE, /* get bit lengths tree for a dynamic block */
- DTREE, /* get length, distance trees for a dynamic block */
- CODES, /* processing fixed or dynamic block */
- DRY, /* output remaining window bytes */
- DONE, /* finished last block, done */
- BAD} /* got a data error--stuck here */
-inflate_block_mode;
-
-/* inflate blocks semi-private state */
-struct inflate_blocks_state {
-
- /* mode */
- inflate_block_mode mode; /* current inflate_block mode */
-
- /* mode dependent information */
- union {
- uInt left; /* if STORED, bytes left to copy */
- struct {
- uInt table; /* table lengths (14 bits) */
- uInt index; /* index into blens (or border) */
- uIntf *blens; /* bit lengths of codes */
- uInt bb; /* bit length tree depth */
- inflate_huft *tb; /* bit length decoding tree */
- } trees; /* if DTREE, decoding info for trees */
- struct {
- inflate_codes_statef
- *codes;
- } decode; /* if CODES, current state */
- } sub; /* submode */
- uInt last; /* true if this block is the last block */
-
- /* mode independent information */
- uInt bitk; /* bits in bit buffer */
- uLong bitb; /* bit buffer */
- inflate_huft *hufts; /* single malloc for tree space */
- Bytef *window; /* sliding window */
- Bytef *end; /* one byte after sliding window */
- Bytef *read; /* window read pointer */
- Bytef *write; /* window write pointer */
- check_func checkfn; /* check function */
- uLong check; /* check on output */
-
-};
-
-
-/* defines for inflate input/output */
-/* update pointers and return */
-#define UPDBITS {s->bitb=b;s->bitk=k;}
-#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
-#define UPDOUT {s->write=q;}
-#define UPDATE {UPDBITS UPDIN UPDOUT}
-#define LEAVE {UPDATE return inflate_flush(s,z,r);}
-/* get bytes and bits */
-#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
-#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
-#define NEXTBYTE (n--,*p++)
-#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
-#define DUMPBITS(j) {b>>=(j);k-=(j);}
-/* output bytes */
-#define WAVAIL (uInt)(q<s->read?s->read-q-1:s->end-q)
-#define LOADOUT {q=s->write;m=(uInt)WAVAIL;}
-#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=(uInt)WAVAIL;}}
-#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
-#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
-#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
-/* load local pointers */
-#define LOAD {LOADIN LOADOUT}
-
-/* masks for lower bits (size given to avoid silly warnings with Visual C++) */
-extern uInt inflate_mask[17];
-
-/* copy as much as possible from the sliding window to the output area */
-extern int inflate_flush OF((
- inflate_blocks_statef *,
- z_streamp ,
- int));
-
-struct internal_state {int dummy;}; /* for buggy compilers */
-
-#endif
+++ /dev/null
-/* maketree.c -- make inffixed.h table for decoding fixed codes
- * Copyright (C) 1995-2002 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-/* This program is included in the distribution for completeness.
- You do not need to compile or run this program since inffixed.h
- is already included in the distribution. To use this program
- you need to compile zlib with BUILDFIXED defined and then compile
- and link this program with the zlib library. Then the output of
- this program can be piped to inffixed.h. */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "zutil.h"
-#include "inftrees.h"
-
-/* simplify the use of the inflate_huft type with some defines */
-#define exop word.what.Exop
-#define bits word.what.Bits
-
-/* generate initialization table for an inflate_huft structure array */
-void maketree(uInt b, inflate_huft *t)
-{
- int i, e;
-
- i = 0;
- while (1)
- {
- e = t[i].exop;
- if (e && (e & (16+64)) == 0) /* table pointer */
- {
- fprintf(stderr, "maketree: cannot initialize sub-tables!\n");
- exit(1);
- }
- if (i % 4 == 0)
- printf("\n ");
- printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base);
- if (++i == (1<<b))
- break;
- putchar(',');
- }
- puts("");
-}
-
-/* create the fixed tables in C initialization syntax */
-void main(void)
-{
- int r;
- uInt bl, bd;
- inflate_huft *tl, *td;
- z_stream z;
-
- z.zalloc = zcalloc;
- z.opaque = (voidpf)0;
- z.zfree = zcfree;
- r = inflate_trees_fixed(&bl, &bd, &tl, &td, &z);
- if (r)
- {
- fprintf(stderr, "inflate_trees_fixed error %d\n", r);
- return;
- }
- puts("/* inffixed.h -- table for decoding fixed codes");
- puts(" * Generated automatically by the maketree.c program");
- puts(" */");
- puts("");
- puts("/* WARNING: this file should *not* be used by applications. It is");
- puts(" part of the implementation of the compression library and is");
- puts(" subject to change. Applications should only use zlib.h.");
- puts(" */");
- puts("");
- printf("local uInt fixed_bl = %d;\n", bl);
- printf("local uInt fixed_bd = %d;\n", bd);
- printf("local inflate_huft fixed_tl[] = {");
- maketree(bl, tl);
- puts(" };");
- printf("local inflate_huft fixed_td[] = {");
- maketree(bd, td);
- puts(" };");
-}
+++ /dev/null
-# Makefile for zlib
-# Borland C++
-
-# This version of the zlib makefile was adapted by Chris Young for use
-# with Borland C 4.5x with the Dos Power Pack for a 32-bit protected mode
-# flat memory model. It was created for use with POV-Ray ray tracer and
-# you may choose to edit the CFLAGS to suit your needs but the
-# switches -WX and -DMSDOS are required.
-# -- Chris Young 76702.1655@compuserve.com
-
-# To use, do "make -fmakefile.b32"
-
-# See zconf.h for details about the memory requirements.
-
-# ------------- Borland C++ -------------
-MODEL=-WX
-CFLAGS= $(MODEL) -P-C -K -N- -k- -d -3 -r- -v- -f -DMSDOS
-CC=bcc32
-LD=bcc32
-LIB=tlib
-LDFLAGS= $(MODEL)
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
- infutil$(O)+inffast$(O)
-
-all: test
-
-adler32.obj: adler32.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
- infcodes.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
- infcodes.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
- $(CC) -c $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
- $(CC) -c $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-zlib.lib: $(OBJ1) $(OBJ2)
- del zlib.lib
- $(LIB) zlib +$(OBJP1)
- $(LIB) zlib +$(OBJP2)
-
-example.exe: example.obj zlib.lib
- $(LD) $(LDFLAGS) example.obj zlib.lib
-
-minigzip.exe: minigzip.obj zlib.lib
- $(LD) $(LDFLAGS) minigzip.obj zlib.lib
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-# Makefile for zlib
-# Borland C++ ************ UNTESTED ***********
-
-# To use, do "make -fmakefile.bor"
-# To compile in small model, set below: MODEL=s
-
-# WARNING: the small model is supported but only for small values of
-# MAX_WBITS and MAX_MEM_LEVEL. For example:
-# -DMAX_WBITS=11 -DDEF_WBITS=11 -DMAX_MEM_LEVEL=3
-# If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to the LOC macro below:
-# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
-# See zconf.h for details about the memory requirements.
-
-# ------------- Turbo C++, Borland C++ -------------
-
-# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
-# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
-# to the declaration of LOC here:
-LOC = $(LOCAL_ZLIB)
-
-# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
-CPU_TYP = 0
-
-# Memory model: one of s, m, c, l (small, medium, compact, large)
-MODEL=l
-
-CC=bcc
-# replace bcc with tcc for Turbo C++ 1.0, with bcc32 for the 32 bit version
-LD=$(CC)
-AR=tlib
-
-# compiler flags
-CFLAGS=-O2 -Z -m$(MODEL) $(LOC)
-# replace "-O2" by "-O -G -a -d" for Turbo C++ 1.0
-
-LDFLAGS=-m$(MODEL)
-
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
- infutil$(O)+inffast$(O)
-
-ZLIB_H = zlib.h zconf.h
-ZUTIL_H = zutil.h $(ZLIB_H)
-
-ZLIB_LIB = zlib_$(MODEL).lib
-
-all: test
-
-# individual dependencies and action rules:
-adler32.obj: adler32.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-compress.obj: compress.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-crc32.obj: crc32.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-gzio.obj: gzio.c $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-inflate.obj: inflate.c $(ZUTIL_H) infblock.h
- $(CC) -c $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
- $(CC) -c $(CFLAGS) $*.c
-
-infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-zutil.obj: zutil.c $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-example.obj: example.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-$(ZLIB_LIB): $(OBJ1) $(OBJ2)
- del $(ZLIB_LIB)
- $(AR) $(ZLIB_LIB) +$(OBJP1)
- $(AR) $(ZLIB_LIB) +$(OBJP2)
-
-example.exe: example.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
-
-minigzip.exe: minigzip.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-# Makefile for zlib. Modified for djgpp v2.0 by F. J. Donahoe, 3/15/96.
-# Copyright (C) 1995-1998 Jean-loup Gailly.
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile, or to compile and test, type:
-#
-# make -fmakefile.dj2; make test -fmakefile.dj2
-#
-# To install libz.a, zconf.h and zlib.h in the djgpp directories, type:
-#
-# make install -fmakefile.dj2
-#
-# after first defining LIBRARY_PATH and INCLUDE_PATH in djgpp.env as
-# in the sample below if the pattern of the DJGPP distribution is to
-# be followed. Remember that, while <sp>'es around <=> are ignored in
-# makefiles, they are *not* in batch files or in djgpp.env.
-# - - - - -
-# [make]
-# INCLUDE_PATH=%\>;INCLUDE_PATH%%\DJDIR%\include
-# LIBRARY_PATH=%\>;LIBRARY_PATH%%\DJDIR%\lib
-# BUTT=-m486
-# - - - - -
-# Alternately, these variables may be defined below, overriding the values
-# in djgpp.env, as
-# INCLUDE_PATH=c:\usr\include
-# LIBRARY_PATH=c:\usr\lib
-
-CC=gcc
-
-#CFLAGS=-MMD -O
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
- -Wstrict-prototypes -Wmissing-prototypes
-
-# If cp.exe is available, replace "copy /Y" with "cp -fp" .
-CP=copy /Y
-# If gnu install.exe is available, replace $(CP) with ginstall.
-INSTALL=$(CP)
-# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
-RM=del
-LDLIBS=-L. -lz
-LD=$(CC) -s -o
-LDSHARED=$(CC)
-
-INCL=zlib.h zconf.h
-LIBS=libz.a
-
-AR=ar rcs
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example.exe minigzip.exe
-
-test: all
- ./example
- echo hello world | .\minigzip | .\minigzip -d
-
-%.o : %.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-libz.a: $(OBJS)
- $(AR) $@ $(OBJS)
-
-%.exe : %.o $(LIBS)
- $(LD) $@ $< $(LDLIBS)
-
-# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
-
-.PHONY : uninstall clean
-
-install: $(INCL) $(LIBS)
- -@if not exist $(INCLUDE_PATH)\nul mkdir $(INCLUDE_PATH)
- -@if not exist $(LIBRARY_PATH)\nul mkdir $(LIBRARY_PATH)
- $(INSTALL) zlib.h $(INCLUDE_PATH)
- $(INSTALL) zconf.h $(INCLUDE_PATH)
- $(INSTALL) libz.a $(LIBRARY_PATH)
-
-uninstall:
- $(RM) $(INCLUDE_PATH)\zlib.h
- $(RM) $(INCLUDE_PATH)\zconf.h
- $(RM) $(LIBRARY_PATH)\libz.a
-
-clean:
- $(RM) *.d
- $(RM) *.o
- $(RM) *.exe
- $(RM) libz.a
- $(RM) foo.gz
-
-DEPS := $(wildcard *.d)
-ifneq ($(DEPS),)
-include $(DEPS)
-endif
+++ /dev/null
-# Makefile for zlib. Modified for emx 0.9c by Chr. Spieler, 6/17/98.
-# Copyright (C) 1995-1998 Jean-loup Gailly.
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile, or to compile and test, type:
-#
-# make -fmakefile.emx; make test -fmakefile.emx
-#
-
-CC=gcc
-
-#CFLAGS=-MMD -O
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
- -Wstrict-prototypes -Wmissing-prototypes
-
-# If cp.exe is available, replace "copy /Y" with "cp -fp" .
-CP=copy /Y
-# If gnu install.exe is available, replace $(CP) with ginstall.
-INSTALL=$(CP)
-# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
-RM=del
-LDLIBS=-L. -lzlib
-LD=$(CC) -s -o
-LDSHARED=$(CC)
-
-INCL=zlib.h zconf.h
-LIBS=zlib.a
-
-AR=ar rcs
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example.exe minigzip.exe
-
-test: all
- ./example
- echo hello world | .\minigzip | .\minigzip -d
-
-%.o : %.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-zlib.a: $(OBJS)
- $(AR) $@ $(OBJS)
-
-%.exe : %.o $(LIBS)
- $(LD) $@ $< $(LDLIBS)
-
-
-.PHONY : clean
-
-clean:
- $(RM) *.d
- $(RM) *.o
- $(RM) *.exe
- $(RM) zlib.a
- $(RM) foo.gz
-
-DEPS := $(wildcard *.d)
-ifneq ($(DEPS),)
-include $(DEPS)
-endif
+++ /dev/null
-# Makefile for zlib
-# Microsoft C 5.1 or later
-
-# To use, do "make makefile.msc"
-# To compile in small model, set below: MODEL=S
-
-# If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to the LOC macro below:
-# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
-# See zconf.h for details about the memory requirements.
-
-# ------------- Microsoft C 5.1 and later -------------
-
-# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
-# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
-# to the declaration of LOC here:
-LOC = $(LOCAL_ZLIB)
-
-# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
-CPU_TYP = 0
-
-# Memory model: one of S, M, C, L (small, medium, compact, large)
-MODEL=L
-
-CC=cl
-CFLAGS=-nologo -A$(MODEL) -G$(CPU_TYP) -W3 -Oait -Gs $(LOC)
-#-Ox generates bad code with MSC 5.1
-LIB_CFLAGS=-Zl $(CFLAGS)
-
-LD=link
-LDFLAGS=/noi/e/st:0x1500/noe/farcall/packcode
-# "/farcall/packcode" are only useful for `large code' memory models
-# but should be a "no-op" for small code models.
-
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
- infutil$(O)+inffast$(O)
-
-ZLIB_H = zlib.h zconf.h
-ZUTIL_H = zutil.h $(ZLIB_H)
-
-ZLIB_LIB = zlib_$(MODEL).lib
-
-all: $(ZLIB_LIB) example.exe minigzip.exe
-
-# individual dependencies and action rules:
-adler32.obj: adler32.c $(ZLIB_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-compress.obj: compress.c $(ZLIB_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-crc32.obj: crc32.c $(ZLIB_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h $(ZUTIL_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-gzio.obj: gzio.c $(ZUTIL_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-inflate.obj: inflate.c $(ZUTIL_H) infblock.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h $(ZUTIL_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-uncompr.obj: uncompr.c $(ZLIB_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-zutil.obj: zutil.c $(ZUTIL_H)
- $(CC) -c $(LIB_CFLAGS) $*.c
-
-example.obj: example.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-$(ZLIB_LIB): $(OBJ1) $(OBJ2)
- if exist $(ZLIB_LIB) del $(ZLIB_LIB)
- lib $(ZLIB_LIB) $(OBJ1);
- lib $(ZLIB_LIB) $(OBJ2);
-
-example.exe: example.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) example.obj,,,$(ZLIB_LIB);
-
-minigzip.exe: minigzip.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) minigzip.obj,,,$(ZLIB_LIB);
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-# Makefile for zlib
-# TurboC 2.0
-
-# To use, do "make -fmakefile.tc"
-# To compile in small model, set below: MODEL=-ms
-
-# WARNING: the small model is supported but only for small values of
-# MAX_WBITS and MAX_MEM_LEVEL. For example:
-# -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
-# If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to CFLAGS below:
-# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
-# See zconf.h for details about the memory requirements.
-
-# ------------- Turbo C 2.0 -------------
-MODEL=l
-# CFLAGS=-O2 -G -Z -m$(MODEL) -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
-CFLAGS=-O2 -G -Z -m$(MODEL)
-CC=tcc -I\tc\include
-LD=tcc -L\tc\lib
-AR=tlib
-LDFLAGS=-m$(MODEL) -f-
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
- infutil$(O)+inffast$(O)
-
-ZLIB_H = zlib.h zconf.h
-ZUTIL_H = zutil.h $(ZLIB_H)
-
-ZLIB_LIB = zlib_$(MODEL).lib
-
-all: test
-
-adler32.obj: adler32.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-compress.obj: compress.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-crc32.obj: crc32.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-gzio.obj: gzio.c $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-inflate.obj: inflate.c $(ZUTIL_H) infblock.h
- $(CC) -c $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
- $(CC) -c $(CFLAGS) $*.c
-
-infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-zutil.obj: zutil.c $(ZUTIL_H)
- $(CC) -c $(CFLAGS) $*.c
-
-example.obj: example.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c $(ZLIB_H)
- $(CC) -c $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-$(ZLIB_LIB): $(OBJ1) $(OBJ2)
- del $(ZLIB_LIB)
- $(AR) $(ZLIB_LIB) +$(OBJP1)
- $(AR) $(ZLIB_LIB) +$(OBJP2)
-
-example.exe: example.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) -eexample.exe example.obj $(ZLIB_LIB)
-
-minigzip.exe: minigzip.obj $(ZLIB_LIB)
- $(LD) $(LDFLAGS) -eminigzip.exe minigzip.obj $(ZLIB_LIB)
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-# Makefile for zlib
-# Microsoft 32-bit Visual C++ 4.0 or later (may work on earlier versions)
-
-# To use, do "nmake /f makefile.w32"
-
-# If you wish to reduce the memory requirements (default 256K for big
-# objects plus a few K), you can add to CFLAGS below:
-# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
-# See zconf.h for details about the memory requirements.
-
-# ------------- Microsoft Visual C++ 4.0 and later -------------
-MODEL=
-CFLAGS=-Ox -GA3s -nologo -W3
-CC=cl
-LD=link
-LDFLAGS=
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
- infutil$(O)+inffast$(O)
-
-all: zlib.lib example.exe minigzip.exe
-
-adler32.obj: adler32.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
- infcodes.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
- infcodes.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
- $(CC) -c $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
- $(CC) -c $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
- $(CC) -c $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
- $(CC) -c $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
- $(CC) -c $(CFLAGS) $*.c
-
-zlib.lib: $(OBJ1) $(OBJ2)
- if exist zlib.lib del zlib.lib
- lib /OUT:zlib.lib $(OBJ1) $(OBJ2)
-
-example.exe: example.obj zlib.lib
- $(LD) $(LDFLAGS) example.obj zlib.lib /OUT:example.exe /SUBSYSTEM:CONSOLE
-
-minigzip.exe: minigzip.obj zlib.lib
- $(LD) $(LDFLAGS) minigzip.obj zlib.lib /OUT:minigzip.exe /SUBSYSTEM:CONSOLE
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-# Makefile for zlib
-# Watcom 10a
-
-# This version of the zlib makefile was adapted by Chris Young for use
-# with Watcom 10a 32-bit protected mode flat memory model. It was created
-# for use with POV-Ray ray tracer and you may choose to edit the CFLAGS to
-# suit your needs but the -DMSDOS is required.
-# -- Chris Young 76702.1655@compuserve.com
-
-# To use, do "wmake -f makefile.wat"
-
-# See zconf.h for details about the memory requirements.
-
-# ------------- Watcom 10a -------------
-MODEL=-mf
-CFLAGS= $(MODEL) -fpi87 -fp5 -zp4 -5r -w5 -oneatx -DMSDOS
-CC=wcc386
-LD=wcl386
-LIB=wlib -b -c
-LDFLAGS=
-O=.obj
-
-# variables
-OBJ1=adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O)
-OBJ2=trees$(O) zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O)
-OBJ3=infutil$(O) inffast$(O)
-OBJP1=adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)
-OBJP2=trees$(O)+zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)
-OBJP3=infutil$(O)+inffast$(O)
-
-all: test
-
-adler32.obj: adler32.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h &
- infcodes.h infutil.h
- $(CC) $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h &
- infcodes.h inffast.h
- $(CC) $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
- $(CC) $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
- $(CC) $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
- $(CC) $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
- $(CC) $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
- $(CC) $(CFLAGS) $*.c
-
-# we must cut the command line to fit in the MS/DOS 128 byte limit:
-zlib.lib: $(OBJ1) $(OBJ2) $(OBJ3)
- del zlib.lib
- $(LIB) zlib.lib +$(OBJP1)
- $(LIB) zlib.lib +$(OBJP2)
- $(LIB) zlib.lib +$(OBJP3)
-
-example.exe: example.obj zlib.lib
- $(LD) $(LDFLAGS) example.obj zlib.lib
-
-minigzip.exe: minigzip.obj zlib.lib
- $(LD) $(LDFLAGS) minigzip.obj zlib.lib
-
-test: minigzip.exe example.exe
- example
- echo hello world | minigzip | minigzip -d >test
- type test
-
-#clean:
-# del *.obj
-# del *.exe
+++ /dev/null
-LIBRARY "zlib"
-
-DESCRIPTION '"""zlib data compression library"""'
-
-EXETYPE NT
-
-SUBSYSTEM WINDOWS
-
-STUB 'WINSTUB.EXE'
-
-VERSION 1.13
-
-CODE EXECUTE READ
-
-DATA READ WRITE
-
-HEAPSIZE 1048576,4096
-
-EXPORTS
- adler32 @1
- compress @2
- crc32 @3
- deflate @4
- deflateCopy @5
- deflateEnd @6
- deflateInit2_ @7
- deflateInit_ @8
- deflateParams @9
- deflateReset @10
- deflateSetDictionary @11
- gzclose @12
- gzdopen @13
- gzerror @14
- gzflush @15
- gzopen @16
- gzread @17
- gzwrite @18
- inflate @19
- inflateEnd @20
- inflateInit2_ @21
- inflateInit_ @22
- inflateReset @23
- inflateSetDictionary @24
- inflateSync @25
- uncompress @26
- zlibVersion @27
- gzprintf @28
- gzputc @29
- gzgetc @30
- gzseek @31
- gzrewind @32
- gztell @33
- gzeof @34
- gzsetparams @35
- zError @36
- inflateSyncPoint @37
- get_crc_table @38
- compress2 @39
- gzputs @40
- gzgets @41
+++ /dev/null
-#include <windows.h>
-
-#define IDR_VERSION1 1
-IDR_VERSION1 VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
- FILEVERSION 1,1,3,0
- PRODUCTVERSION 1,1,3,0
- FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
- FILEFLAGS 0
- FILEOS VOS_DOS_WINDOWS32
- FILETYPE VFT_DLL
- FILESUBTYPE 0 // not used
-BEGIN
- BLOCK "StringFileInfo"
- BEGIN
- BLOCK "040904E4"
- //language ID = U.S. English, char set = Windows, Multilingual
-
- BEGIN
- VALUE "FileDescription", "zlib data compression library\0"
- VALUE "FileVersion", "1.1.3\0"
- VALUE "InternalName", "zlib\0"
- VALUE "OriginalFilename", "zlib.dll\0"
- VALUE "ProductName", "ZLib.DLL\0"
- VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
- VALUE "LegalCopyright", "(C) 1995-1998 Jean-loup Gailly & Mark Adler\0"
- END
- END
- BLOCK "VarFileInfo"
- BEGIN
- VALUE "Translation", 0x0409, 1252
- END
-END
+++ /dev/null
-# Makefile for zlib. Modified for emx/rsxnt by Chr. Spieler, 6/16/98.
-# Copyright (C) 1995-1998 Jean-loup Gailly.
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile, or to compile and test, type:
-#
-# make -fmakefile.emx; make test -fmakefile.emx
-#
-
-CC=gcc -Zwin32
-
-#CFLAGS=-MMD -O
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
- -Wstrict-prototypes -Wmissing-prototypes
-
-# If cp.exe is available, replace "copy /Y" with "cp -fp" .
-CP=copy /Y
-# If gnu install.exe is available, replace $(CP) with ginstall.
-INSTALL=$(CP)
-# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
-RM=del
-LDLIBS=-L. -lzlib
-LD=$(CC) -s -o
-LDSHARED=$(CC)
-
-INCL=zlib.h zconf.h
-LIBS=zlib.a
-
-AR=ar rcs
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example.exe minigzip.exe
-
-test: all
- ./example
- echo hello world | .\minigzip | .\minigzip -d
-
-%.o : %.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-zlib.a: $(OBJS)
- $(AR) $@ $(OBJS)
-
-%.exe : %.o $(LIBS)
- $(LD) $@ $< $(LDLIBS)
-
-
-.PHONY : clean
-
-clean:
- $(RM) *.d
- $(RM) *.o
- $(RM) *.exe
- $(RM) zlib.a
- $(RM) foo.gz
-
-DEPS := $(wildcard *.d)
-ifneq ($(DEPS),)
-include $(DEPS)
-endif
-# Makefile for zlib. Modified for emx 0.9c by Chr. Spieler, 6/17/98.
-# Copyright (C) 1995-1998 Jean-loup Gailly.
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile, or to compile and test, type:
-#
-# make -fmakefile.emx; make test -fmakefile.emx
-#
-
-CC=gcc
-
-#CFLAGS=-MMD -O
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
- -Wstrict-prototypes -Wmissing-prototypes
-
-# If cp.exe is available, replace "copy /Y" with "cp -fp" .
-CP=copy /Y
-# If gnu install.exe is available, replace $(CP) with ginstall.
-INSTALL=$(CP)
-# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
-RM=del
-LDLIBS=-L. -lzlib
-LD=$(CC) -s -o
-LDSHARED=$(CC)
-
-INCL=zlib.h zconf.h
-LIBS=zlib.a
-
-AR=ar rcs
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example.exe minigzip.exe
-
-test: all
- ./example
- echo hello world | .\minigzip | .\minigzip -d
-
-%.o : %.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-zlib.a: $(OBJS)
- $(AR) $@ $(OBJS)
-
-%.exe : %.o $(LIBS)
- $(LD) $@ $< $(LDLIBS)
-
-
-.PHONY : clean
-
-clean:
- $(RM) *.d
- $(RM) *.o
- $(RM) *.exe
- $(RM) zlib.a
- $(RM) foo.gz
-
-DEPS := $(wildcard *.d)
-ifneq ($(DEPS),)
-include $(DEPS)
-endif
+++ /dev/null
-# Makefile for zlib. Modified for mingw32 by C. Spieler, 6/16/98.
-# (This Makefile is directly derived from Makefile.dj2)
-# Copyright (C) 1995-1998 Jean-loup Gailly.
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile, or to compile and test, type:
-#
-# make -fmakefile.gcc; make test -fmakefile.gcc
-#
-# To install libz.a, zconf.h and zlib.h in the mingw32 directories, type:
-#
-# make install -fmakefile.gcc
-#
-
-CC=gcc
-
-#CFLAGS=-MMD -O
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-MMD -g -DDEBUG
-CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
- -Wstrict-prototypes -Wmissing-prototypes
-
-# If cp.exe is available, replace "copy /Y" with "cp -fp" .
-CP=copy /Y
-# If gnu install.exe is available, replace $(CP) with ginstall.
-INSTALL=$(CP)
-# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
-RM=del
-LDLIBS=-L. -lz
-LD=$(CC) -s -o
-LDSHARED=$(CC)
-
-INCL=zlib.h zconf.h
-LIBS=libz.a
-
-AR=ar rcs
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-all: example.exe minigzip.exe
-
-test: all
- ./example
- echo hello world | .\minigzip | .\minigzip -d
-
-%.o : %.c
- $(CC) $(CFLAGS) -c $< -o $@
-
-libz.a: $(OBJS)
- $(AR) $@ $(OBJS)
-
-%.exe : %.o $(LIBS)
- $(LD) $@ $< $(LDLIBS)
-
-# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
-
-.PHONY : uninstall clean
-
-install: $(INCL) $(LIBS)
- -@if not exist $(INCLUDE_PATH)\nul mkdir $(INCLUDE_PATH)
- -@if not exist $(LIBRARY_PATH)\nul mkdir $(LIBRARY_PATH)
- $(INSTALL) zlib.h $(INCLUDE_PATH)
- $(INSTALL) zconf.h $(INCLUDE_PATH)
- $(INSTALL) libz.a $(LIBRARY_PATH)
-
-uninstall:
- $(RM) $(INCLUDE_PATH)\zlib.h
- $(RM) $(INCLUDE_PATH)\zconf.h
- $(RM) $(LIBRARY_PATH)\libz.a
-
-clean:
- $(RM) *.d
- $(RM) *.o
- $(RM) *.exe
- $(RM) libz.a
- $(RM) foo.gz
-
-DEPS := $(wildcard *.d)
-ifneq ($(DEPS),)
-include $(DEPS)
-endif
+++ /dev/null
-# Makefile for zlib
-
-!include <ntwin32.mak>
-
-CC=cl
-LD=link
-CFLAGS=-O -nologo
-LDFLAGS=
-O=.obj
-
-# variables
-OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
- trees$(O)
-OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
- infutil$(O) inffast$(O)
-
-all: zlib.dll example.exe minigzip.exe
-
-adler32.obj: adler32.c zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-compress.obj: compress.c zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-crc32.obj: crc32.c zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-gzio.obj: gzio.c zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
- infcodes.h infutil.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
- infcodes.h inffast.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-uncompr.obj: uncompr.c zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-zutil.obj: zutil.c zutil.h zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-example.obj: example.c zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-minigzip.obj: minigzip.c zlib.h zconf.h
- $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
-
-zlib.dll: $(OBJ1) $(OBJ2) zlib.dnt
- link $(dlllflags) -out:$@ -def:zlib.dnt $(OBJ1) $(OBJ2) $(guilibsdll)
-
-zlib.lib: zlib.dll
-
-example.exe: example.obj zlib.lib
- $(LD) $(LDFLAGS) example.obj zlib.lib
-
-minigzip.exe: minigzip.obj zlib.lib
- $(LD) $(LDFLAGS) minigzip.obj zlib.lib
-
-test: example.exe minigzip.exe
- example
- echo hello world | minigzip | minigzip -d
-
-clean:
- del *.obj
- del *.exe
- del *.dll
- del *.lib
+++ /dev/null
-LIBRARY zlib.dll
-EXETYPE WINDOWS
-CODE PRELOAD MOVEABLE DISCARDABLE
-DATA PRELOAD MOVEABLE MULTIPLE
-
-EXPORTS
- adler32 @1
- compress @2
- crc32 @3
- deflate @4
- deflateCopy @5
- deflateEnd @6
- deflateInit2_ @7
- deflateInit_ @8
- deflateParams @9
- deflateReset @10
- deflateSetDictionary @11
- gzclose @12
- gzdopen @13
- gzerror @14
- gzflush @15
- gzopen @16
- gzread @17
- gzwrite @18
- inflate @19
- inflateEnd @20
- inflateInit2_ @21
- inflateInit_ @22
- inflateReset @23
- inflateSetDictionary @24
- inflateSync @25
- uncompress @26
- zlibVersion @27
- gzprintf @28
- gzputc @29
- gzgetc @30
- gzseek @31
- gzrewind @32
- gztell @33
- gzeof @34
- gzsetparams @35
- zError @36
- inflateSyncPoint @37
- get_crc_table @38
- compress2 @39
- gzputs @40
- gzgets @41
--- /dev/null
+$! make libz under VMS
+$! written by Martin P.J. Zinser <m.zinser@gsi.de>
+$!
+$! Look for the compiler used
+$!
+$ ccopt = ""
+$ if f$getsyi("HW_MODEL").ge.1024
+$ then
+$ ccopt = "/prefix=all"+ccopt
+$ comp = "__decc__=1"
+$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$ else
+$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
+$ then
+$ comp = "__vaxc__=1"
+$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$ else
+$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
+$ ccopt = "/decc/prefix=all"+ccopt
+$ comp = "__decc__=1"
+$ endif
+$ endif
+$!
+$! Build the thing plain or with mms
+$!
+$ write sys$output "Compiling Zlib sources ..."
+$ if f$search("SYS$SYSTEM:MMS.EXE").eqs.""
+$ then
+$ dele example.obj;*,minigzip.obj;*
+$ CALL MAKE adler32.OBJ "CC ''CCOPT' adler32" -
+ adler32.c zlib.h zconf.h
+$ CALL MAKE compress.OBJ "CC ''CCOPT' compress" -
+ compress.c zlib.h zconf.h
+$ CALL MAKE crc32.OBJ "CC ''CCOPT' crc32" -
+ crc32.c zlib.h zconf.h
+$ CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
+ deflate.c deflate.h zutil.h zlib.h zconf.h
+$ CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
+ gzio.c zutil.h zlib.h zconf.h
+$ CALL MAKE infblock.OBJ "CC ''CCOPT' infblock" -
+ infblock.c zutil.h zlib.h zconf.h infblock.h
+$ CALL MAKE infcodes.OBJ "CC ''CCOPT' infcodes" -
+ infcodes.c zutil.h zlib.h zconf.h inftrees.h
+$ CALL MAKE inffast.OBJ "CC ''CCOPT' inffast" -
+ inffast.c zutil.h zlib.h zconf.h inffast.h
+$ CALL MAKE inflate.OBJ "CC ''CCOPT' inflate" -
+ inflate.c zutil.h zlib.h zconf.h infblock.h
+$ CALL MAKE inftrees.OBJ "CC ''CCOPT' inftrees" -
+ inftrees.c zutil.h zlib.h zconf.h inftrees.h
+$ CALL MAKE infutil.OBJ "CC ''CCOPT' infutil" -
+ infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+$ CALL MAKE trees.OBJ "CC ''CCOPT' trees" -
+ trees.c deflate.h zutil.h zlib.h zconf.h
+$ CALL MAKE uncompr.OBJ "CC ''CCOPT' uncompr" -
+ uncompr.c zlib.h zconf.h
+$ CALL MAKE zutil.OBJ "CC ''CCOPT' zutil" -
+ zutil.c zutil.h zlib.h zconf.h
+$ write sys$output "Building Zlib ..."
+$ CALL MAKE libz.OLB "lib/crea libz.olb *.obj" *.OBJ
+$ write sys$output "Building example..."
+$ CALL MAKE example.OBJ "CC ''CCOPT' example" -
+ example.c zlib.h zconf.h
+$ call make example.exe "LINK example,libz.olb/lib" example.obj libz.olb
+$ write sys$output "Building minigzip..."
+$ CALL MAKE minigzip.OBJ "CC ''CCOPT' minigzip" -
+ minigzip.c zlib.h zconf.h
+$ call make minigzip.exe -
+ "LINK minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib" -
+ minigzip.obj libz.olb
+$ else
+$ mms/macro=('comp')
+$ endif
+$ write sys$output "Zlib build completed"
+$ exit
+$!
+$!
+$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES
+$ V = 'F$Verify(0)
+$! P1 = What we are trying to make
+$! P2 = Command to make it
+$! P3 - P8 What it depends on
+$
+$ If F$Search(P1) .Eqs. "" Then Goto Makeit
+$ Time = F$CvTime(F$File(P1,"RDT"))
+$arg=3
+$Loop:
+$ Argument = P'arg
+$ If Argument .Eqs. "" Then Goto Exit
+$ El=0
+$Loop2:
+$ File = F$Element(El," ",Argument)
+$ If File .Eqs. " " Then Goto Endl
+$ AFile = ""
+$Loop3:
+$ OFile = AFile
+$ AFile = F$Search(File)
+$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
+$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
+$ Goto Loop3
+$NextEL:
+$ El = El + 1
+$ Goto Loop2
+$EndL:
+$ arg=arg+1
+$ If arg .Le. 8 Then Goto Loop
+$ Goto Exit
+$
+$Makeit:
+$ VV=F$VERIFY(0)
+$ write sys$output P2
+$ 'P2
+$ VV='F$Verify(VV)
+$Exit:
+$ If V Then Set Verify
+$ENDSUBROUTINE
--- /dev/null
+# Project: zlib_1_03
+# Patched for zlib 1.1.2 rw@shadow.org.uk 19980430
+# test works out-of-the-box, installs `somewhere' on demand
+
+# Toolflags:
+CCflags = -c -depend !Depend -IC: -g -throwback -DRISCOS -fah
+C++flags = -c -depend !Depend -IC: -throwback
+Linkflags = -aif -c++ -o $@
+ObjAsmflags = -throwback -NoCache -depend !Depend
+CMHGflags =
+LibFileflags = -c -l -o $@
+Squeezeflags = -o $@
+
+# change the line below to where _you_ want the library installed.
+libdest = lib:zlib
+
+# Final targets:
+@.lib: @.o.adler32 @.o.compress @.o.crc32 @.o.deflate @.o.gzio \
+ @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil @.o.trees \
+ @.o.uncompr @.o.zutil
+ LibFile $(LibFileflags) @.o.adler32 @.o.compress @.o.crc32 @.o.deflate \
+ @.o.gzio @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil \
+ @.o.trees @.o.uncompr @.o.zutil
+test: @.minigzip @.example @.lib
+ @copy @.lib @.libc A~C~DF~L~N~P~Q~RS~TV
+ @echo running tests: hang on.
+ @/@.minigzip -f -9 libc
+ @/@.minigzip -d libc-gz
+ @/@.minigzip -f -1 libc
+ @/@.minigzip -d libc-gz
+ @/@.minigzip -h -9 libc
+ @/@.minigzip -d libc-gz
+ @/@.minigzip -h -1 libc
+ @/@.minigzip -d libc-gz
+ @/@.minigzip -9 libc
+ @/@.minigzip -d libc-gz
+ @/@.minigzip -1 libc
+ @/@.minigzip -d libc-gz
+ @diff @.lib @.libc
+ @echo that should have reported '@.lib and @.libc identical' if you have diff.
+ @/@.example @.fred @.fred
+ @echo that will have given lots of hello!'s.
+
+@.minigzip: @.o.minigzip @.lib C:o.Stubs
+ Link $(Linkflags) @.o.minigzip @.lib C:o.Stubs
+@.example: @.o.example @.lib C:o.Stubs
+ Link $(Linkflags) @.o.example @.lib C:o.Stubs
+
+install: @.lib
+ cdir $(libdest)
+ cdir $(libdest).h
+ @copy @.h.zlib $(libdest).h.zlib A~C~DF~L~N~P~Q~RS~TV
+ @copy @.h.zconf $(libdest).h.zconf A~C~DF~L~N~P~Q~RS~TV
+ @copy @.lib $(libdest).lib A~C~DF~L~N~P~Q~RS~TV
+ @echo okay, installed zlib in $(libdest)
+
+clean:; remove @.minigzip
+ remove @.example
+ remove @.libc
+ -wipe @.o.* F~r~cV
+ remove @.fred
+
+# User-editable dependencies:
+.c.o:
+ cc $(ccflags) -o $@ $<
+
+# Static dependencies:
+
+# Dynamic dependencies:
+o.example: c.example
+o.example: h.zlib
+o.example: h.zconf
+o.minigzip: c.minigzip
+o.minigzip: h.zlib
+o.minigzip: h.zconf
+o.adler32: c.adler32
+o.adler32: h.zlib
+o.adler32: h.zconf
+o.compress: c.compress
+o.compress: h.zlib
+o.compress: h.zconf
+o.crc32: c.crc32
+o.crc32: h.zlib
+o.crc32: h.zconf
+o.deflate: c.deflate
+o.deflate: h.deflate
+o.deflate: h.zutil
+o.deflate: h.zlib
+o.deflate: h.zconf
+o.gzio: c.gzio
+o.gzio: h.zutil
+o.gzio: h.zlib
+o.gzio: h.zconf
+o.infblock: c.infblock
+o.infblock: h.zutil
+o.infblock: h.zlib
+o.infblock: h.zconf
+o.infblock: h.infblock
+o.infblock: h.inftrees
+o.infblock: h.infcodes
+o.infblock: h.infutil
+o.infcodes: c.infcodes
+o.infcodes: h.zutil
+o.infcodes: h.zlib
+o.infcodes: h.zconf
+o.infcodes: h.inftrees
+o.infcodes: h.infblock
+o.infcodes: h.infcodes
+o.infcodes: h.infutil
+o.infcodes: h.inffast
+o.inffast: c.inffast
+o.inffast: h.zutil
+o.inffast: h.zlib
+o.inffast: h.zconf
+o.inffast: h.inftrees
+o.inffast: h.infblock
+o.inffast: h.infcodes
+o.inffast: h.infutil
+o.inffast: h.inffast
+o.inflate: c.inflate
+o.inflate: h.zutil
+o.inflate: h.zlib
+o.inflate: h.zconf
+o.inflate: h.infblock
+o.inftrees: c.inftrees
+o.inftrees: h.zutil
+o.inftrees: h.zlib
+o.inftrees: h.zconf
+o.inftrees: h.inftrees
+o.inftrees: h.inffixed
+o.infutil: c.infutil
+o.infutil: h.zutil
+o.infutil: h.zlib
+o.infutil: h.zconf
+o.infutil: h.infblock
+o.infutil: h.inftrees
+o.infutil: h.infcodes
+o.infutil: h.infutil
+o.trees: c.trees
+o.trees: h.deflate
+o.trees: h.zutil
+o.trees: h.zlib
+o.trees: h.zconf
+o.trees: h.trees
+o.uncompr: c.uncompr
+o.uncompr: h.zlib
+o.uncompr: h.zconf
+o.zutil: c.zutil
+o.zutil: h.zutil
+o.zutil: h.zlib
+o.zutil: h.zconf
--- /dev/null
+This directory contains files that have not been updated for zlib 1.2.0.
+
+(Volunteers are encouraged to help clean this up. Thanks.)
--- /dev/null
+# Amiga powerUP (TM) Makefile
+# makefile for libpng and SAS C V6.58/7.00 PPC compiler
+# Copyright (C) 1998 by Andreas R. Kleinert
+
+CC = scppc
+CFLAGS = NOSTKCHK NOSINT OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL \
+ OPTLOOP OPTRDEP=8 OPTDEP=8 OPTCOMP=8
+LIBNAME = libzip.a
+AR = ppc-amigaos-ar
+AR_FLAGS = cr
+RANLIB = ppc-amigaos-ranlib
+LDFLAGS = -r -o
+LDLIBS = LIB:scppc.a
+LN = ppc-amigaos-ld
+RM = delete quiet
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example minigzip
+
+test: all
+ example
+ echo hello world | minigzip | minigzip -d
+
+$(LIBNAME): $(OBJS)
+ $(AR) $(AR_FLAGS) $@ $(OBJS)
+ $(RANLIB) $@
+
+example: example.o $(LIBNAME)
+ $(LN) $(LDFLAGS) example LIB:c_ppc.o example.o $(LIBNAME) $(LDLIBS) LIB:end.o
+
+minigzip: minigzip.o $(LIBNAME)
+ $(LN) $(LDFLAGS) minigzip LIB:c_ppc.o minigzip.o $(LIBNAME) $(LDLIBS) LIB:end.o
+
+clean:
+ $(RM) *.o example minigzip $(LIBNAME) foo.gz
+
+zip:
+ zip -ul9 zlib README ChangeLog Makefile Make????.??? Makefile.?? \
+ descrip.mms *.[ch]
+
+tgz:
+ cd ..; tar cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile \
+ zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/*.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zutil.h zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: zutil.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h infblock.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- /dev/null
+# SMakefile for zlib
+# Modified from the standard UNIX Makefile Copyright Jean-loup Gailly
+# Osma Ahvenlampi <Osma.Ahvenlampi@hut.fi>
+# Amiga, SAS/C 6.56 & Smake
+
+CC=sc
+CFLAGS=OPT
+#CFLAGS=OPT CPU=68030
+#CFLAGS=DEBUG=LINE
+LDFLAGS=LIB z.lib
+
+SCOPTIONS=OPTSCHED OPTINLINE OPTALIAS OPTTIME OPTINLOCAL STRMERGE \
+ NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: SCOPTIONS example minigzip
+
+test: all
+ `cd`/example
+ echo hello world | minigzip | minigzip -d
+
+install: z.lib
+ copy zlib.h zconf.h INCLUDE: clone
+ copy z.lib LIB: clone
+
+z.lib: $(OBJS)
+ oml z.lib r $(OBJS)
+
+example: example.o z.lib
+ $(CC) $(CFLAGS) LINK TO $@ example.o $(LDFLAGS)
+
+minigzip: minigzip.o z.lib
+ $(CC) $(CFLAGS) LINK TO $@ minigzip.o $(LDFLAGS)
+
+clean:
+ -delete force quiet *.o example minigzip z.lib foo.gz *.lnk SCOPTIONS
+
+SCOPTIONS: Smakefile
+ copy to $@ <from <
+$(SCOPTIONS)
+<
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zutil.h zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: zutil.h zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+infblock.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+infcodes.o: zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h infblock.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+infutil.o: zutil.h zlib.h zconf.h inftrees.h infutil.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- /dev/null
+# descrip.mms: MMS description file for building zlib on VMS
+# written by Martin P.J. Zinser <m.zinser@gsi.de>
+
+cc_defs =
+c_deb =
+
+.ifdef __DECC__
+pref = /prefix=all
+.endif
+
+OBJS = adler32.obj, compress.obj, crc32.obj, gzio.obj, uncompr.obj,\
+ deflate.obj, trees.obj, zutil.obj, inflate.obj, infblock.obj,\
+ inftrees.obj, infcodes.obj, infutil.obj, inffast.obj
+
+CFLAGS= $(C_DEB) $(CC_DEFS) $(PREF)
+
+all : example.exe minigzip.exe
+ @ write sys$output " Example applications available"
+libz.olb : libz.olb($(OBJS))
+ @ write sys$output " libz available"
+
+example.exe : example.obj libz.olb
+ link example,libz.olb/lib
+
+minigzip.exe : minigzip.obj libz.olb
+ link minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib
+
+clean :
+ delete *.obj;*,libz.olb;*
+
+
+# Other dependencies.
+adler32.obj : zutil.h zlib.h zconf.h
+compress.obj : zlib.h zconf.h
+crc32.obj : zutil.h zlib.h zconf.h
+deflate.obj : deflate.h zutil.h zlib.h zconf.h
+example.obj : zlib.h zconf.h
+gzio.obj : zutil.h zlib.h zconf.h
+infblock.obj : zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+infcodes.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
+inffast.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+inflate.obj : zutil.h zlib.h zconf.h infblock.h
+inftrees.obj : zutil.h zlib.h zconf.h inftrees.h
+infutil.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h
+minigzip.obj : zlib.h zconf.h
+trees.obj : deflate.h zutil.h zlib.h zconf.h
+uncompr.obj : zlib.h zconf.h
+zutil.obj : zutil.h zlib.h zconf.h
--- /dev/null
+# Makefile for zlib
+# Borland C++
+
+# This version of the zlib makefile was adapted by Chris Young for use
+# with Borland C 4.5x with the Dos Power Pack for a 32-bit protected mode
+# flat memory model. It was created for use with POV-Ray ray tracer and
+# you may choose to edit the CFLAGS to suit your needs but the
+# switches -WX and -DMSDOS are required.
+# -- Chris Young 76702.1655@compuserve.com
+
+# To use, do "make -fmakefile.b32"
+
+# See zconf.h for details about the memory requirements.
+
+# ------------- Borland C++ -------------
+MODEL=-WX
+CFLAGS= $(MODEL) -P-C -K -N- -k- -d -3 -r- -v- -f -DMSDOS
+CC=bcc32
+LD=bcc32
+LIB=tlib
+LDFLAGS= $(MODEL)
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+ infutil$(O)+inffast$(O)
+
+all: test
+
+adler32.obj: adler32.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
+ infcodes.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
+ infcodes.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+zlib.lib: $(OBJ1) $(OBJ2)
+ del zlib.lib
+ $(LIB) zlib +$(OBJP1)
+ $(LIB) zlib +$(OBJP2)
+
+example.exe: example.obj zlib.lib
+ $(LD) $(LDFLAGS) example.obj zlib.lib
+
+minigzip.exe: minigzip.obj zlib.lib
+ $(LD) $(LDFLAGS) minigzip.obj zlib.lib
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+# Makefile for zlib
+# Borland C++ ************ UNTESTED ***********
+
+# To use, do "make -fmakefile.bor"
+# To compile in small model, set below: MODEL=s
+
+# WARNING: the small model is supported but only for small values of
+# MAX_WBITS and MAX_MEM_LEVEL. For example:
+# -DMAX_WBITS=11 -DDEF_WBITS=11 -DMAX_MEM_LEVEL=3
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to the LOC macro below:
+# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Turbo C++, Borland C++ -------------
+
+# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
+# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
+# to the declaration of LOC here:
+LOC = $(LOCAL_ZLIB)
+
+# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
+CPU_TYP = 0
+
+# Memory model: one of s, m, c, l (small, medium, compact, large)
+MODEL=l
+
+CC=bcc
+# replace bcc with tcc for Turbo C++ 1.0, with bcc32 for the 32 bit version
+LD=$(CC)
+AR=tlib
+
+# compiler flags
+CFLAGS=-O2 -Z -m$(MODEL) $(LOC)
+# replace "-O2" by "-O -G -a -d" for Turbo C++ 1.0
+
+LDFLAGS=-m$(MODEL)
+
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+ infutil$(O)+inffast$(O)
+
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
+
+ZLIB_LIB = zlib_$(MODEL).lib
+
+all: test
+
+# individual dependencies and action rules:
+adler32.obj: adler32.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+ del $(ZLIB_LIB)
+ $(AR) $(ZLIB_LIB) +$(OBJP1)
+ $(AR) $(ZLIB_LIB) +$(OBJP2)
+
+example.exe: example.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
+
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+# Makefile for zlib. Modified for djgpp v2.0 by F. J. Donahoe, 3/15/96.
+# Copyright (C) 1995-1998 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile, or to compile and test, type:
+#
+# make -fmakefile.dj2; make test -fmakefile.dj2
+#
+# To install libz.a, zconf.h and zlib.h in the djgpp directories, type:
+#
+# make install -fmakefile.dj2
+#
+# after first defining LIBRARY_PATH and INCLUDE_PATH in djgpp.env as
+# in the sample below if the pattern of the DJGPP distribution is to
+# be followed. Remember that, while <sp>'es around <=> are ignored in
+# makefiles, they are *not* in batch files or in djgpp.env.
+# - - - - -
+# [make]
+# INCLUDE_PATH=%\>;INCLUDE_PATH%%\DJDIR%\include
+# LIBRARY_PATH=%\>;LIBRARY_PATH%%\DJDIR%\lib
+# BUTT=-m486
+# - - - - -
+# Alternately, these variables may be defined below, overriding the values
+# in djgpp.env, as
+# INCLUDE_PATH=c:\usr\include
+# LIBRARY_PATH=c:\usr\lib
+
+CC=gcc
+
+#CFLAGS=-MMD -O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-MMD -g -DDEBUG
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lz
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=libz.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+ ./example
+ echo hello world | .\minigzip | .\minigzip -d
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+libz.a: $(OBJS)
+ $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+ $(LD) $@ $< $(LDLIBS)
+
+# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
+
+.PHONY : uninstall clean
+
+install: $(INCL) $(LIBS)
+ -@if not exist $(INCLUDE_PATH)\nul mkdir $(INCLUDE_PATH)
+ -@if not exist $(LIBRARY_PATH)\nul mkdir $(LIBRARY_PATH)
+ $(INSTALL) zlib.h $(INCLUDE_PATH)
+ $(INSTALL) zconf.h $(INCLUDE_PATH)
+ $(INSTALL) libz.a $(LIBRARY_PATH)
+
+uninstall:
+ $(RM) $(INCLUDE_PATH)\zlib.h
+ $(RM) $(INCLUDE_PATH)\zconf.h
+ $(RM) $(LIBRARY_PATH)\libz.a
+
+clean:
+ $(RM) *.d
+ $(RM) *.o
+ $(RM) *.exe
+ $(RM) libz.a
+ $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
--- /dev/null
+# Makefile for zlib. Modified for emx 0.9c by Chr. Spieler, 6/17/98.
+# Copyright (C) 1995-1998 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile, or to compile and test, type:
+#
+# make -fmakefile.emx; make test -fmakefile.emx
+#
+
+CC=gcc
+
+#CFLAGS=-MMD -O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-MMD -g -DDEBUG
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+ ./example
+ echo hello world | .\minigzip | .\minigzip -d
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+zlib.a: $(OBJS)
+ $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+ $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+ $(RM) *.d
+ $(RM) *.o
+ $(RM) *.exe
+ $(RM) zlib.a
+ $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
--- /dev/null
+# Makefile for zlib
+# Microsoft C 5.1 or later
+
+# To use, do "make makefile.msc"
+# To compile in small model, set below: MODEL=S
+
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to the LOC macro below:
+# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Microsoft C 5.1 and later -------------
+
+# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
+# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or added
+# to the declaration of LOC here:
+LOC = $(LOCAL_ZLIB)
+
+# Type for CPU required: 0: 8086, 1: 80186, 2: 80286, 3: 80386, etc.
+CPU_TYP = 0
+
+# Memory model: one of S, M, C, L (small, medium, compact, large)
+MODEL=L
+
+CC=cl
+CFLAGS=-nologo -A$(MODEL) -G$(CPU_TYP) -W3 -Oait -Gs $(LOC)
+#-Ox generates bad code with MSC 5.1
+LIB_CFLAGS=-Zl $(CFLAGS)
+
+LD=link
+LDFLAGS=/noi/e/st:0x1500/noe/farcall/packcode
+# "/farcall/packcode" are only useful for `large code' memory models
+# but should be a "no-op" for small code models.
+
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+ infutil$(O)+inffast$(O)
+
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
+
+ZLIB_LIB = zlib_$(MODEL).lib
+
+all: $(ZLIB_LIB) example.exe minigzip.exe
+
+# individual dependencies and action rules:
+adler32.obj: adler32.c $(ZLIB_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+compress.obj: compress.c $(ZLIB_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+crc32.obj: crc32.c $(ZLIB_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+gzio.obj: gzio.c $(ZUTIL_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+uncompr.obj: uncompr.c $(ZLIB_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+zutil.obj: zutil.c $(ZUTIL_H)
+ $(CC) -c $(LIB_CFLAGS) $*.c
+
+example.obj: example.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+ if exist $(ZLIB_LIB) del $(ZLIB_LIB)
+ lib $(ZLIB_LIB) $(OBJ1);
+ lib $(ZLIB_LIB) $(OBJ2);
+
+example.exe: example.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) example.obj,,,$(ZLIB_LIB);
+
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) minigzip.obj,,,$(ZLIB_LIB);
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+# Makefile for zlib
+# TurboC 2.0
+
+# To use, do "make -fmakefile.tc"
+# To compile in small model, set below: MODEL=-ms
+
+# WARNING: the small model is supported but only for small values of
+# MAX_WBITS and MAX_MEM_LEVEL. For example:
+# -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to CFLAGS below:
+# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Turbo C 2.0 -------------
+MODEL=l
+# CFLAGS=-O2 -G -Z -m$(MODEL) -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
+CFLAGS=-O2 -G -Z -m$(MODEL)
+CC=tcc -I\tc\include
+LD=tcc -L\tc\lib
+AR=tlib
+LDFLAGS=-m$(MODEL) -f-
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+ infutil$(O)+inffast$(O)
+
+ZLIB_H = zlib.h zconf.h
+ZUTIL_H = zutil.h $(ZLIB_H)
+
+ZLIB_LIB = zlib_$(MODEL).lib
+
+all: test
+
+adler32.obj: adler32.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c $(ZUTIL_H) infblock.h inftrees.h infcodes.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c $(ZUTIL_H) inftrees.h infutil.h infcodes.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c $(ZUTIL_H) infblock.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c $(ZUTIL_H) inftrees.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c $(ZUTIL_H) inftrees.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c $(ZUTIL_H) inftrees.h infutil.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c $(ZUTIL_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c $(ZLIB_H)
+ $(CC) -c $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+$(ZLIB_LIB): $(OBJ1) $(OBJ2)
+ del $(ZLIB_LIB)
+ $(AR) $(ZLIB_LIB) +$(OBJP1)
+ $(AR) $(ZLIB_LIB) +$(OBJP2)
+
+example.exe: example.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) -eexample.exe example.obj $(ZLIB_LIB)
+
+minigzip.exe: minigzip.obj $(ZLIB_LIB)
+ $(LD) $(LDFLAGS) -eminigzip.exe minigzip.obj $(ZLIB_LIB)
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+# Makefile for zlib
+# Microsoft 32-bit Visual C++ 4.0 or later (may work on earlier versions)
+
+# To use, do "nmake /f makefile.w32"
+
+# If you wish to reduce the memory requirements (default 256K for big
+# objects plus a few K), you can add to CFLAGS below:
+# -DMAX_MEM_LEVEL=7 -DMAX_WBITS=14
+# See zconf.h for details about the memory requirements.
+
+# ------------- Microsoft Visual C++ 4.0 and later -------------
+MODEL=
+CFLAGS=-Ox -GA3s -nologo -W3
+CC=cl
+LD=link
+LDFLAGS=
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJP1 = adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)+\
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
+ infutil$(O)+inffast$(O)
+
+all: zlib.lib example.exe minigzip.exe
+
+adler32.obj: adler32.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
+ infcodes.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
+ infcodes.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+ $(CC) -c $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+ $(CC) -c $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+ $(CC) -c $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+ $(CC) -c $(CFLAGS) $*.c
+
+zlib.lib: $(OBJ1) $(OBJ2)
+ if exist zlib.lib del zlib.lib
+ lib /OUT:zlib.lib $(OBJ1) $(OBJ2)
+
+example.exe: example.obj zlib.lib
+ $(LD) $(LDFLAGS) example.obj zlib.lib /OUT:example.exe /SUBSYSTEM:CONSOLE
+
+minigzip.exe: minigzip.obj zlib.lib
+ $(LD) $(LDFLAGS) minigzip.obj zlib.lib /OUT:minigzip.exe /SUBSYSTEM:CONSOLE
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+# Makefile for zlib
+# Watcom 10a
+
+# This version of the zlib makefile was adapted by Chris Young for use
+# with Watcom 10a 32-bit protected mode flat memory model. It was created
+# for use with POV-Ray ray tracer and you may choose to edit the CFLAGS to
+# suit your needs but the -DMSDOS is required.
+# -- Chris Young 76702.1655@compuserve.com
+
+# To use, do "wmake -f makefile.wat"
+
+# See zconf.h for details about the memory requirements.
+
+# ------------- Watcom 10a -------------
+MODEL=-mf
+CFLAGS= $(MODEL) -fpi87 -fp5 -zp4 -5r -w5 -oneatx -DMSDOS
+CC=wcc386
+LD=wcl386
+LIB=wlib -b -c
+LDFLAGS=
+O=.obj
+
+# variables
+OBJ1=adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O)
+OBJ2=trees$(O) zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O)
+OBJ3=infutil$(O) inffast$(O)
+OBJP1=adler32$(O)+compress$(O)+crc32$(O)+gzio$(O)+uncompr$(O)+deflate$(O)
+OBJP2=trees$(O)+zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)
+OBJP3=infutil$(O)+inffast$(O)
+
+all: test
+
+adler32.obj: adler32.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h &
+ infcodes.h infutil.h
+ $(CC) $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h &
+ infcodes.h inffast.h
+ $(CC) $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+ $(CC) $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+ $(CC) $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+ $(CC) $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+ $(CC) $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+ $(CC) $(CFLAGS) $*.c
+
+# we must cut the command line to fit in the MS/DOS 128 byte limit:
+zlib.lib: $(OBJ1) $(OBJ2) $(OBJ3)
+ del zlib.lib
+ $(LIB) zlib.lib +$(OBJP1)
+ $(LIB) zlib.lib +$(OBJP2)
+ $(LIB) zlib.lib +$(OBJP3)
+
+example.exe: example.obj zlib.lib
+ $(LD) $(LDFLAGS) example.obj zlib.lib
+
+minigzip.exe: minigzip.obj zlib.lib
+ $(LD) $(LDFLAGS) minigzip.obj zlib.lib
+
+test: minigzip.exe example.exe
+ example
+ echo hello world | minigzip | minigzip -d >test
+ type test
+
+#clean:
+# del *.obj
+# del *.exe
--- /dev/null
+LIBRARY "zlib"
+
+DESCRIPTION '"""zlib data compression library"""'
+
+EXETYPE NT
+
+SUBSYSTEM WINDOWS
+
+STUB 'WINSTUB.EXE'
+
+VERSION 1.13
+
+CODE EXECUTE READ
+
+DATA READ WRITE
+
+HEAPSIZE 1048576,4096
+
+EXPORTS
+ adler32 @1
+ compress @2
+ crc32 @3
+ deflate @4
+ deflateCopy @5
+ deflateEnd @6
+ deflateInit2_ @7
+ deflateInit_ @8
+ deflateParams @9
+ deflateReset @10
+ deflateSetDictionary @11
+ gzclose @12
+ gzdopen @13
+ gzerror @14
+ gzflush @15
+ gzopen @16
+ gzread @17
+ gzwrite @18
+ inflate @19
+ inflateEnd @20
+ inflateInit2_ @21
+ inflateInit_ @22
+ inflateReset @23
+ inflateSetDictionary @24
+ inflateSync @25
+ uncompress @26
+ zlibVersion @27
+ gzprintf @28
+ gzputc @29
+ gzgetc @30
+ gzseek @31
+ gzrewind @32
+ gztell @33
+ gzeof @34
+ gzsetparams @35
+ zError @36
+ inflateSyncPoint @37
+ get_crc_table @38
+ compress2 @39
+ gzputs @40
+ gzgets @41
--- /dev/null
+#include <windows.h>
+
+#define IDR_VERSION1 1
+IDR_VERSION1 VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
+ FILEVERSION 1,1,3,0
+ PRODUCTVERSION 1,1,3,0
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+ FILEFLAGS 0
+ FILEOS VOS_DOS_WINDOWS32
+ FILETYPE VFT_DLL
+ FILESUBTYPE 0 // not used
+BEGIN
+ BLOCK "StringFileInfo"
+ BEGIN
+ BLOCK "040904E4"
+ //language ID = U.S. English, char set = Windows, Multilingual
+
+ BEGIN
+ VALUE "FileDescription", "zlib data compression library\0"
+ VALUE "FileVersion", "1.1.3\0"
+ VALUE "InternalName", "zlib\0"
+ VALUE "OriginalFilename", "zlib.dll\0"
+ VALUE "ProductName", "ZLib.DLL\0"
+ VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
+ VALUE "LegalCopyright", "(C) 1995-1998 Jean-loup Gailly & Mark Adler\0"
+ END
+ END
+ BLOCK "VarFileInfo"
+ BEGIN
+ VALUE "Translation", 0x0409, 1252
+ END
+END
--- /dev/null
+# Makefile for zlib. Modified for emx/rsxnt by Chr. Spieler, 6/16/98.
+# Copyright (C) 1995-1998 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile, or to compile and test, type:
+#
+# make -fmakefile.emx; make test -fmakefile.emx
+#
+
+CC=gcc -Zwin32
+
+#CFLAGS=-MMD -O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-MMD -g -DDEBUG
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+ ./example
+ echo hello world | .\minigzip | .\minigzip -d
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+zlib.a: $(OBJS)
+ $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+ $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+ $(RM) *.d
+ $(RM) *.o
+ $(RM) *.exe
+ $(RM) zlib.a
+ $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
+# Makefile for zlib. Modified for emx 0.9c by Chr. Spieler, 6/17/98.
+# Copyright (C) 1995-1998 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile, or to compile and test, type:
+#
+# make -fmakefile.emx; make test -fmakefile.emx
+#
+
+CC=gcc
+
+#CFLAGS=-MMD -O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-MMD -g -DDEBUG
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lzlib
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=zlib.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+ ./example
+ echo hello world | .\minigzip | .\minigzip -d
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+zlib.a: $(OBJS)
+ $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+ $(LD) $@ $< $(LDLIBS)
+
+
+.PHONY : clean
+
+clean:
+ $(RM) *.d
+ $(RM) *.o
+ $(RM) *.exe
+ $(RM) zlib.a
+ $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
--- /dev/null
+# Makefile for zlib. Modified for mingw32 by C. Spieler, 6/16/98.
+# (This Makefile is directly derived from Makefile.dj2)
+# Copyright (C) 1995-1998 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile, or to compile and test, type:
+#
+# make -fmakefile.gcc; make test -fmakefile.gcc
+#
+# To install libz.a, zconf.h and zlib.h in the mingw32 directories, type:
+#
+# make install -fmakefile.gcc
+#
+
+CC=gcc
+
+#CFLAGS=-MMD -O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-MMD -g -DDEBUG
+CFLAGS=-MMD -O3 $(BUTT) -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ -Wstrict-prototypes -Wmissing-prototypes
+
+# If cp.exe is available, replace "copy /Y" with "cp -fp" .
+CP=copy /Y
+# If gnu install.exe is available, replace $(CP) with ginstall.
+INSTALL=$(CP)
+# The default value of RM is "rm -f." If "rm.exe" is found, comment out:
+RM=del
+LDLIBS=-L. -lz
+LD=$(CC) -s -o
+LDSHARED=$(CC)
+
+INCL=zlib.h zconf.h
+LIBS=libz.a
+
+AR=ar rcs
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+all: example.exe minigzip.exe
+
+test: all
+ ./example
+ echo hello world | .\minigzip | .\minigzip -d
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+libz.a: $(OBJS)
+ $(AR) $@ $(OBJS)
+
+%.exe : %.o $(LIBS)
+ $(LD) $@ $< $(LDLIBS)
+
+# INCLUDE_PATH and LIBRARY_PATH were set for [make] in djgpp.env .
+
+.PHONY : uninstall clean
+
+install: $(INCL) $(LIBS)
+ -@if not exist $(INCLUDE_PATH)\nul mkdir $(INCLUDE_PATH)
+ -@if not exist $(LIBRARY_PATH)\nul mkdir $(LIBRARY_PATH)
+ $(INSTALL) zlib.h $(INCLUDE_PATH)
+ $(INSTALL) zconf.h $(INCLUDE_PATH)
+ $(INSTALL) libz.a $(LIBRARY_PATH)
+
+uninstall:
+ $(RM) $(INCLUDE_PATH)\zlib.h
+ $(RM) $(INCLUDE_PATH)\zconf.h
+ $(RM) $(LIBRARY_PATH)\libz.a
+
+clean:
+ $(RM) *.d
+ $(RM) *.o
+ $(RM) *.exe
+ $(RM) libz.a
+ $(RM) foo.gz
+
+DEPS := $(wildcard *.d)
+ifneq ($(DEPS),)
+include $(DEPS)
+endif
--- /dev/null
+# Makefile for zlib
+
+!include <ntwin32.mak>
+
+CC=cl
+LD=link
+CFLAGS=-O -nologo
+LDFLAGS=
+O=.obj
+
+# variables
+OBJ1 = adler32$(O) compress$(O) crc32$(O) gzio$(O) uncompr$(O) deflate$(O) \
+ trees$(O)
+OBJ2 = zutil$(O) inflate$(O) infblock$(O) inftrees$(O) infcodes$(O) \
+ infutil$(O) inffast$(O)
+
+all: zlib.dll example.exe minigzip.exe
+
+adler32.obj: adler32.c zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+compress.obj: compress.c zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+crc32.obj: crc32.c zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+gzio.obj: gzio.c zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+infblock.obj: infblock.c zutil.h zlib.h zconf.h infblock.h inftrees.h\
+ infcodes.h infutil.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+infcodes.obj: infcodes.c zutil.h zlib.h zconf.h inftrees.h infutil.h\
+ infcodes.h inffast.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+inflate.obj: inflate.c zutil.h zlib.h zconf.h infblock.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+infutil.obj: infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+trees.obj: trees.c deflate.h zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+uncompr.obj: uncompr.c zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+zutil.obj: zutil.c zutil.h zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+example.obj: example.c zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+minigzip.obj: minigzip.c zlib.h zconf.h
+ $(CC) -c $(cvarsdll) $(CFLAGS) $*.c
+
+zlib.dll: $(OBJ1) $(OBJ2) zlib.dnt
+ link $(dlllflags) -out:$@ -def:zlib.dnt $(OBJ1) $(OBJ2) $(guilibsdll)
+
+zlib.lib: zlib.dll
+
+example.exe: example.obj zlib.lib
+ $(LD) $(LDFLAGS) example.obj zlib.lib
+
+minigzip.exe: minigzip.obj zlib.lib
+ $(LD) $(LDFLAGS) minigzip.obj zlib.lib
+
+test: example.exe minigzip.exe
+ example
+ echo hello world | minigzip | minigzip -d
+
+clean:
+ del *.obj
+ del *.exe
+ del *.dll
+ del *.lib
--- /dev/null
+LIBRARY zlib.dll
+EXETYPE WINDOWS
+CODE PRELOAD MOVEABLE DISCARDABLE
+DATA PRELOAD MOVEABLE MULTIPLE
+
+EXPORTS
+ adler32 @1
+ compress @2
+ crc32 @3
+ deflate @4
+ deflateCopy @5
+ deflateEnd @6
+ deflateInit2_ @7
+ deflateInit_ @8
+ deflateParams @9
+ deflateReset @10
+ deflateSetDictionary @11
+ gzclose @12
+ gzdopen @13
+ gzerror @14
+ gzflush @15
+ gzopen @16
+ gzread @17
+ gzwrite @18
+ inflate @19
+ inflateEnd @20
+ inflateInit2_ @21
+ inflateInit_ @22
+ inflateReset @23
+ inflateSetDictionary @24
+ inflateSync @25
+ uncompress @26
+ zlibVersion @27
+ gzprintf @28
+ gzputc @29
+ gzgetc @30
+ gzseek @31
+ gzrewind @32
+ gztell @33
+ gzeof @34
+ gzsetparams @35
+ zError @36
+ inflateSyncPoint @37
+ get_crc_table @38
+ compress2 @39
+ gzputs @40
+ gzgets @41
--- /dev/null
+# Makefile for zlib under OS/2 using GCC (PGCC)
+# For conditions of distribution and use, see copyright notice in zlib.h
+
+# To compile and test, type:
+# cp Makefile.os2 ..
+# cd ..
+# make -f Makefile.os2 test
+
+# This makefile will build a static library z.lib, a shared library
+# z.dll and a import library zdll.lib. You can use either z.lib or
+# zdll.lib by specifying either -lz or -lzdll on gcc's command line
+
+CC=gcc -Zomf -s
+
+CFLAGS=-O6 -Wall
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+# -Wstrict-prototypes -Wmissing-prototypes
+
+#################### BUG WARNING: #####################
+## infcodes.c hits a bug in pgcc-1.0, so you have to use either
+## -O# where # <= 4 or one of (-fno-ommit-frame-pointer or -fno-force-mem)
+## This bug is reportedly fixed in pgcc >1.0, but this was not tested
+CFLAGS+=-fno-force-mem
+
+LDFLAGS=-s -L. -lzdll -Zcrtdll
+LDSHARED=$(CC) -s -Zomf -Zdll -Zcrtdll
+
+VER=1.1.0
+ZLIB=z.lib
+SHAREDLIB=z.dll
+SHAREDLIBIMP=zdll.lib
+LIBS=$(ZLIB) $(SHAREDLIB) $(SHAREDLIBIMP)
+
+AR=emxomfar cr
+IMPLIB=emximp
+RANLIB=echo
+TAR=tar
+SHELL=bash
+
+prefix=/usr/local
+exec_prefix = $(prefix)
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+ zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+TEST_OBJS = example.o minigzip.o
+
+DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
+ algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+ nt/Makefile.nt nt/zlib.dnt contrib/README.contrib contrib/*.txt \
+ contrib/asm386/*.asm contrib/asm386/*.c \
+ contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
+ contrib/iostream/*.h contrib/iostream2/*.h contrib/iostream2/*.cpp \
+ contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32
+
+all: example.exe minigzip.exe
+
+test: all
+ @LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
+ echo hello world | ./minigzip | ./minigzip -d || \
+ echo ' *** minigzip test FAILED ***' ; \
+ if ./example; then \
+ echo ' *** zlib test OK ***'; \
+ else \
+ echo ' *** zlib test FAILED ***'; \
+ fi
+
+$(ZLIB): $(OBJS)
+ $(AR) $@ $(OBJS)
+ -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+$(SHAREDLIB): $(OBJS) os2/z.def
+ $(LDSHARED) -o $@ $^
+
+$(SHAREDLIBIMP): os2/z.def
+ $(IMPLIB) -o $@ $^
+
+example.exe: example.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
+
+minigzip.exe: minigzip.o $(LIBS)
+ $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
+
+clean:
+ rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
+
+distclean: clean
+
+zip:
+ mv Makefile Makefile~; cp -p Makefile.in Makefile
+ rm -f test.c ztest*.c
+ v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+ zip -ul9 zlib$$v $(DISTFILES)
+ mv Makefile~ Makefile
+
+dist:
+ mv Makefile Makefile~; cp -p Makefile.in Makefile
+ rm -f test.c ztest*.c
+ d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+ rm -f $$d.tar.gz; \
+ if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
+ files=""; \
+ for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
+ cd ..; \
+ GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
+ if test ! -d $$d; then rm -f $$d; fi
+ mv Makefile~ Makefile
+
+tags:
+ etags *.[ch]
+
+depend:
+ makedepend -- $(CFLAGS) -- *.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+infblock.o: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
+infcodes.o: zutil.h zlib.h zconf.h
+infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h
+inffast.o: infblock.h infcodes.h infutil.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h infblock.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+minigzip.o: zlib.h zconf.h
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h
--- /dev/null
+;
+; Slightly modified version of ../nt/zlib.dnt :-)
+;
+
+LIBRARY Z
+DESCRIPTION "Zlib compression library for OS/2"
+CODE PRELOAD MOVEABLE DISCARDABLE
+DATA PRELOAD MOVEABLE MULTIPLE
+
+EXPORTS
+ adler32
+ compress
+ crc32
+ deflate
+ deflateCopy
+ deflateEnd
+ deflateInit2_
+ deflateInit_
+ deflateParams
+ deflateReset
+ deflateSetDictionary
+ gzclose
+ gzdopen
+ gzerror
+ gzflush
+ gzopen
+ gzread
+ gzwrite
+ inflate
+ inflateEnd
+ inflateInit2_
+ inflateInit_
+ inflateReset
+ inflateSetDictionary
+ inflateSync
+ uncompress
+ zlibVersion
+ gzprintf
+ gzputc
+ gzgetc
+ gzseek
+ gzrewind
+ gztell
+ gzeof
+ gzsetparams
+ zError
+ inflateSyncPoint
+ get_crc_table
+ compress2
+ gzputs
+ gzgets
--- /dev/null
+.TH ZLIB 3 "11 March 2002"
+.SH NAME
+zlib \- compression/decompression library
+.SH SYNOPSIS
+[see
+.I zlib.h
+for full description]
+.SH DESCRIPTION
+The
+.I zlib
+library is a general purpose data compression library.
+The code is thread safe.
+It provides in-memory compression and decompression functions,
+including integrity checks of the uncompressed data.
+This version of the library supports only one compression method (deflation)
+but other algorithms will be added later and will have the same stream interface.
+.LP
+Compression can be done in a single step if the buffers are large enough
+(for example if an input file is mmap'ed),
+or can be done by repeated calls of the compression function.
+In the latter case,
+the application must provide more input and/or consume the output
+(providing more output space) before each call.
+.LP
+The library also supports reading and writing files in
+.I gzip
+(.gz) format
+with an interface similar to that of stdio.
+.LP
+The library does not install any signal handler. The decoder checks
+the consistency of the compressed data, so the library should never
+crash even in case of corrupted input.
+.LP
+All functions of the compression library are documented in the file
+.IR zlib.h.
+The distribution source includes examples of use of the library
+the files
+.I example.c
+and
+.IR minigzip.c .
+.LP
+A Java implementation of
+.IR zlib
+is available in the Java Development Kit 1.1
+.IP
+http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
+.LP
+A Perl interface to
+.IR zlib ,
+written by Paul Marquess (pmarquess@bfsec.bt.co.uk)
+is available at CPAN (Comprehensive Perl Archive Network) sites,
+such as:
+.IP
+ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+.LP
+A Python interface to
+.IR zlib
+written by A.M. Kuchling <amk@magnet.com>
+is available from the Python Software Association sites, such as:
+.IP
+ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
+.SH "SEE ALSO"
+Questions about zlib should be sent to:
+.IP
+zlib@quest.jpl.nasa.gov
+or, if this fails, to the author addresses given below.
+The zlib home page is:
+.IP
+http://www.cdrom.com/pub/infozip/zlib/
+.LP
+The data format used by the zlib library is described by RFC
+(Request for Comments) 1950 to 1952 in the files:
+.IP
+ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
+.br
+rfc1951.txt (deflate format)
+.br
+rfc1952.txt (gzip format)
+.LP
+These documents are also available in other formats from:
+.IP
+ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+.SH AUTHORS
+Version 1.1.4
+Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org)
+and Mark Adler (madler@alumni.caltech.edu).
+.LP
+This software is provided "as-is,"
+without any express or implied warranty.
+In no event will the authors be held liable for any damages
+arising from the use of this software.
+See the distribution directory with respect to requirements
+governing redistribution.
+The deflate format used by
+.I zlib
+was defined by Phil Katz.
+The deflate and
+.I zlib
+specifications were written by L. Peter Deutsch.
+Thanks to all the people who reported problems and suggested various
+improvements in
+.IR zlib ;
+who are too numerous to cite here.
+.LP
+UNIX manual page by R. P. C. Rodgers,
+U.S. National Library of Medicine (rodgers@nlm.nih.gov).
+.\" end of man page
--- /dev/null
+<html>
+<head>
+ <title>
+ zlib general purpose compression library version 1.1.4
+ </title>
+</head>
+<body bgcolor="White" text="Black" vlink="Red" alink="Navy" link="Red">
+<!-- background="zlibbg.gif" -->
+
+<h1> zlib 1.1.4 Manual </h1>
+<hr>
+<a name="Contents"><h2>Contents</h2>
+<ol type="I">
+<li> <a href="#Prologue">Prologue</a>
+<li> <a href="#Introduction">Introduction</a>
+<li> <a href="#Utility functions">Utility functions</a>
+<li> <a href="#Basic functions">Basic functions</a>
+<li> <a href="#Advanced functions">Advanced functions</a>
+<li> <a href="#Constants">Constants</a>
+<li> <a href="#struct z_stream_s">struct z_stream_s</a>
+<li> <a href="#Checksum functions">Checksum functions</a>
+<li> <a href="#Misc">Misc</a>
+</ol>
+<hr>
+<a name="Prologue"><h2> Prologue </h2>
+ 'zlib' general purpose compression library version 1.1.4, March 11th, 2002
+ <p>
+ Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
+ <p>
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+ <p>
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+ <ol>
+ <li> The origin of this software must not be misrepresented ; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ <li> Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ <li> This notice may not be removed or altered from any source distribution.
+ </ol>
+
+ <dl>
+ <dt>Jean-loup Gailly
+ <dd><a href="mailto:jloup@gzip.org">jloup@gzip.org</a>
+ <dt>Mark Adler
+ <dd><a href="mailto:madler@alumni.caltech.edu">madler@alumni.caltech.edu</a>
+ </dl>
+
+ The data format used by the zlib library is described by RFCs (Request for
+ Comments) 1950 to 1952 in the files
+ <a href="ftp://ds.internic.net/rfc/rfc1950.txt">
+ ftp://ds.internic.net/rfc/rfc1950.txt </a>
+ (zlib format),
+ <a href="ftp://ds.internic.net/rfc/rfc1951.txt">
+ rfc1951.txt </a>
+ (<a href="#deflate">deflate</a> format) and
+ <a href="ftp://ds.internic.net/rfc/rfc1952.txt">
+ rfc1952.txt </a>
+ (gzip format).
+ <p>
+ This manual is converted from zlib.h by
+ <a href="mailto:piaip@csie.ntu.edu.tw"> piaip </a>
+ <p>
+ Visit <a href="http://ftp.cdrom.com/pub/infozip/zlib/">
+ http://ftp.cdrom.com/pub/infozip/zlib/</a>
+ for the official zlib web page.
+ <p>
+
+<hr>
+<a name="Introduction"><h2> Introduction </h2>
+ The 'zlib' compression library provides in-memory compression and
+ decompression functions, including integrity checks of the uncompressed
+ data. This version of the library supports only one compression method
+ (deflation) but other algorithms will be added later and will have the same
+ stream interface.
+ <p>
+
+ Compression can be done in a single step if the buffers are large
+ enough (for example if an input file is mmap'ed), or can be done by
+ repeated calls of the compression function. In the latter case, the
+ application must provide more input and/or consume the output
+ (providing more output space) before each call.
+ <p>
+
+ The library also supports reading and writing files in gzip (.gz) format
+ with an interface similar to that of stdio.
+ <p>
+
+ The library does not install any signal handler. The decoder checks
+ the consistency of the compressed data, so the library should never
+ crash even in case of corrupted input.
+ <p>
+
+<hr>
+<a name="Utility functions"><h2> Utility functions </h2>
+ The following utility functions are implemented on top of the
+ <a href="#Basic functions">basic stream-oriented functions</a>.
+ To simplify the interface, some
+ default options are assumed (compression level and memory usage,
+ standard memory allocation functions). The source code of these
+ utility functions can easily be modified if you need special options.
+<h3> Function list </h3>
+<ul>
+<li> int <a href="#compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
+<li> int <a href="#compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
+<li> int <a href="#uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
+<li> typedef voidp gzFile;
+<li> gzFile <a href="#gzopen">gzopen</a> (const char *path, const char *mode);
+<li> gzFile <a href="#gzdopen">gzdopen</a> (int fd, const char *mode);
+<li> int <a href="#gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);
+<li> int <a href="#gzread">gzread</a> (gzFile file, voidp buf, unsigned len);
+<li> int <a href="#gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);
+<li> int VA <a href="#gzprintf">gzprintf</a> (gzFile file, const char *format, ...);
+<li> int <a href="#gzputs">gzputs</a> (gzFile file, const char *s);
+<li> char * <a href="#gzgets">gzgets</a> (gzFile file, char *buf, int len);
+<li> int <a href="#gzputc">gzputc</a> (gzFile file, int c);
+<li> int <a href="#gzgetc">gzgetc</a> (gzFile file);
+<li> int <a href="#gzflush">gzflush</a> (gzFile file, int flush);
+<li> z_off_t <a href="#gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);
+<li> z_off_t <a href="#gztell">gztell</a> (gzFile file);
+<li> int <a href="#gzrewind">gzrewind</a> (gzFile file);
+<li> int <a href="#gzeof">gzeof</a> (gzFile file);
+<li> int <a href="#gzclose">gzclose</a> (gzFile file);
+<li> const char * <a href="#gzerror">gzerror</a> (gzFile file, int *errnum);
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> int <a name="compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
+<dd>
+ Compresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be at least 0.1% larger than
+ sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
+ compressed buffer.<p>
+ This function can be used to <a href="#compress">compress</a> a whole file at once if the
+ input file is mmap'ed.<p>
+ <a href="#compress">compress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+ enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
+ buffer.<p>
+
+<font color="Blue"><dt> int <a name="compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);</font>
+<dd>
+ Compresses the source buffer into the destination buffer. The level
+ parameter has the same meaning as in <a href="#deflateInit">deflateInit</a>. sourceLen is the byte
+ length of the source buffer. Upon entry, destLen is the total size of the
+ destination buffer, which must be at least 0.1% larger than sourceLen plus
+ 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+ <p>
+
+ <a href="#compress2">compress2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+ memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output buffer,
+ <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the level parameter is invalid.
+ <p>
+
+<font color="Blue"><dt> int <a name="uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
+<dd>
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer. <p>
+ This function can be used to decompress a whole file at once if the
+ input file is mmap'ed.
+ <p>
+
+ <a href="#uncompress">uncompress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+ enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
+ buffer, or <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was corrupted.
+ <p>
+
+<dt> typedef voidp gzFile;
+<dd> <p>
+
+<font color="Blue"><dt> gzFile <a name="gzopen">gzopen</a> (const char *path, const char *mode);</font>
+<dd>
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
+ is as in fopen ("rb" or "wb") but can also include a compression level
+ ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
+ Huffman only compression as in "wb1h". (See the description
+ of <a href="#deflateInit2">deflateInit2</a> for more information about the strategy parameter.)
+ <p>
+
+ <a href="#gzopen">gzopen</a> can be used to read a file which is not in gzip format ; in this
+ case <a href="#gzread">gzread</a> will directly read from the file without decompression.
+ <p>
+
+ <a href="#gzopen">gzopen</a> returns NULL if the file could not be opened or if there was
+ insufficient memory to allocate the (de)compression <a href="#state">state</a> ; errno
+ can be checked to distinguish the two cases (if errno is zero, the
+ zlib error is <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a>).
+ <p>
+
+<font color="Blue"><dt> gzFile <a name="gzdopen">gzdopen</a> (int fd, const char *mode);</font>
+<dd>
+ <a href="#gzdopen">gzdopen</a>() associates a gzFile with the file descriptor fd. File
+ descriptors are obtained from calls like open, dup, creat, pipe or
+ fileno (in the file has been previously opened with fopen).
+ The mode parameter is as in <a href="#gzopen">gzopen</a>.
+ <p>
+ The next call of <a href="#gzclose">gzclose</a> on the returned gzFile will also close the
+ file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+ descriptor fd. If you want to keep fd open, use <a href="#gzdopen">gzdopen</a>(dup(fd), mode).
+ <p>
+ <a href="#gzdopen">gzdopen</a> returns NULL if there was insufficient memory to allocate
+ the (de)compression <a href="#state">state</a>.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);</font>
+<dd>
+ Dynamically update the compression level or strategy. See the description
+ of <a href="#deflateInit2">deflateInit2</a> for the meaning of these parameters.
+ <p>
+ <a href="#gzsetparams">gzsetparams</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the file was not
+ opened for writing.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzread">gzread</a> (gzFile file, voidp buf, unsigned len);</font>
+<dd>
+ Reads the given number of uncompressed bytes from the compressed file.
+ If the input file was not in gzip format, <a href="#gzread">gzread</a> copies the given number
+ of bytes into the buffer.
+ <p>
+ <a href="#gzread">gzread</a> returns the number of uncompressed bytes actually read (0 for
+ end of file, -1 for error).
+ <p>
+
+<font color="Blue"><dt> int <a name="gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);</font>
+<dd>
+ Writes the given number of uncompressed bytes into the compressed file.
+ <a href="#gzwrite">gzwrite</a> returns the number of uncompressed bytes actually written
+ (0 in case of error).
+ <p>
+
+<font color="Blue"><dt> int VA <a name="gzprintf">gzprintf</a> (gzFile file, const char *format, ...);</font>
+<dd>
+ Converts, formats, and writes the args to the compressed file under
+ control of the format string, as in fprintf. <a href="#gzprintf">gzprintf</a> returns the number of
+ uncompressed bytes actually written (0 in case of error).
+ <p>
+
+<font color="Blue"><dt> int <a name="gzputs">gzputs</a> (gzFile file, const char *s);</font>
+<dd>
+ Writes the given null-terminated string to the compressed file, excluding
+ the terminating null character.
+ <p>
+ <a href="#gzputs">gzputs</a> returns the number of characters written, or -1 in case of error.
+ <p>
+
+<font color="Blue"><dt> char * <a name="gzgets">gzgets</a> (gzFile file, char *buf, int len);</font>
+<dd>
+ Reads bytes from the compressed file until len-1 characters are read, or
+ a newline character is read and transferred to buf, or an end-of-file
+ condition is encountered. The string is then terminated with a null
+ character.
+ <p>
+ <a href="#gzgets">gzgets</a> returns buf, or <a href="#Z_NULL">Z_NULL</a> in case of error.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzputc">gzputc</a> (gzFile file, int c);</font>
+<dd>
+ Writes c, converted to an unsigned char, into the compressed file.
+ <a href="#gzputc">gzputc</a> returns the value that was written, or -1 in case of error.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzgetc">gzgetc</a> (gzFile file);</font>
+<dd>
+ Reads one byte from the compressed file. <a href="#gzgetc">gzgetc</a> returns this byte
+ or -1 in case of end of file or error.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzflush">gzflush</a> (gzFile file, int flush);</font>
+<dd>
+ Flushes all pending output into the compressed file. The parameter
+ flush is as in the <a href="#deflate">deflate</a>() function. The return value is the zlib
+ error number (see function <a href="#gzerror">gzerror</a> below). <a href="#gzflush">gzflush</a> returns <a href="#Z_OK">Z_OK</a> if
+ the flush parameter is <a href="#Z_FINISH">Z_FINISH</a> and all output could be flushed.
+ <p>
+ <a href="#gzflush">gzflush</a> should be called only when strictly necessary because it can
+ degrade compression.
+ <p>
+
+<font color="Blue"><dt> z_off_t <a name="gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);</font>
+<dd>
+ Sets the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
+ given compressed file. The offset represents a number of bytes in the
+ uncompressed data stream. The whence parameter is defined as in lseek(2);
+ the value SEEK_END is not supported.
+ <p>
+ If the file is opened for reading, this function is emulated but can be
+ extremely slow. If the file is opened for writing, only forward seeks are
+ supported ; <a href="#gzseek">gzseek</a> then compresses a sequence of zeroes up to the new
+ starting position.
+ <p>
+ <a href="#gzseek">gzseek</a> returns the resulting offset location as measured in bytes from
+ the beginning of the uncompressed stream, or -1 in case of error, in
+ particular if the file is opened for writing and the new starting position
+ would be before the current position.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzrewind">gzrewind</a> (gzFile file);</font>
+<dd>
+ Rewinds the given file. This function is supported only for reading.
+ <p>
+ <a href="#gzrewind">gzrewind</a>(file) is equivalent to (int)<a href="#gzseek">gzseek</a>(file, 0L, SEEK_SET)
+ <p>
+
+<font color="Blue"><dt> z_off_t <a name="gztell">gztell</a> (gzFile file);</font>
+<dd>
+ Returns the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
+ given compressed file. This position represents a number of bytes in the
+ uncompressed data stream.
+ <p>
+
+ <a href="#gztell">gztell</a>(file) is equivalent to <a href="#gzseek">gzseek</a>(file, 0L, SEEK_CUR)
+ <p>
+
+<font color="Blue"><dt> int <a name="gzeof">gzeof</a> (gzFile file);</font>
+<dd>
+ Returns 1 when EOF has previously been detected reading the given
+ input stream, otherwise zero.
+ <p>
+
+<font color="Blue"><dt> int <a name="gzclose">gzclose</a> (gzFile file);</font>
+<dd>
+ Flushes all pending output if necessary, closes the compressed file
+ and deallocates all the (de)compression <a href="#state">state</a>. The return value is the zlib
+ error number (see function <a href="#gzerror">gzerror</a> below).
+ <p>
+
+<font color="Blue"><dt> const char * <a name="gzerror">gzerror</a> (gzFile file, int *errnum);</font>
+<dd>
+ Returns the error message for the last error which occurred on the
+ given compressed file. errnum is set to zlib error number. If an
+ error occurred in the file system and not in the compression library,
+ errnum is set to <a href="#Z_ERRNO">Z_ERRNO</a> and the application may consult errno
+ to get the exact error code.
+ <p>
+</dl>
+<hr>
+<a name="Basic functions"><h2> Basic functions </h2>
+<h3> Function list </h3>
+<ul>
+<li> const char * <a href="#zlibVersion">zlibVersion</a> (void);
+<li> int <a href="#deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);
+<li> int <a href="#deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
+<li> int <a href="#deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int <a href="#inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int <a href="#inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
+<li> int <a href="#inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
+</ul>
+
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> const char * <a name="zlibVersion">zlibVersion</a> (void);</font>
+<dd> The application can compare <a href="#zlibVersion">zlibVersion</a> and ZLIB_VERSION for consistency.
+ If the first character differs, the library code actually used is
+ not compatible with the zlib.h header file used by the application.
+ This check is automatically made by <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a>.
+ <p>
+
+<font color="Blue"><dt> int <a name="deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);</font>
+<dd>
+ Initializes the internal stream <a href="#state">state</a> for compression. The fields
+ <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by the caller.
+ If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#deflateInit">deflateInit</a> updates them to
+ use default allocation functions.
+ <p>
+
+ The compression level must be <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>, or between 0 and 9:
+ 1 gives best speed, 9 gives best compression, 0 gives no compression at
+ all (the input data is simply copied a block at a time).
+ <p>
+
+ <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> requests a default compromise between speed and
+ compression (currently equivalent to level 6).
+ <p>
+
+ <a href="#deflateInit">deflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+ enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if level is not a valid compression level,
+ <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version (<a href="#zlib_version">zlib_version</a>) is incompatible
+ with the version assumed by the caller (ZLIB_VERSION).
+ <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit">deflateInit</a> does not
+ perform any compression: this will be done by <a href="#deflate">deflate</a>().
+ <p>
+
+<font color="Blue"><dt> int <a name="deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
+<dd>
+ <a href="#deflate">deflate</a> compresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may introduce some
+ output latency (reading input without producing any output) except when
+ forced to flush.<p>
+
+ The detailed semantics are as follows. <a href="#deflate">deflate</a> performs one or both of the
+ following actions:
+
+ <ul>
+ <li> Compress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> are updated and
+ processing will resume at this point for the next call of <a href="#deflate">deflate</a>().
+
+ <li>
+ Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a>
+ accordingly. This action is forced if the parameter flush is non zero.
+ Forcing flush frequently degrades the compression ratio, so this parameter
+ should be set only when necessary (in interactive applications).
+ Some output may be provided even if flush is not set.
+ </ul> <p>
+
+ Before the call of <a href="#deflate">deflate</a>(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> accordingly ; <a href="#avail_out">avail_out</a>
+ should never be zero before the call. The application can consume the
+ compressed output when it wants, for example when the output buffer is full
+ (<a href="#avail_out">avail_out</a> == 0), or after each call of <a href="#deflate">deflate</a>(). If <a href="#deflate">deflate</a> returns <a href="#Z_OK">Z_OK</a>
+ and with zero <a href="#avail_out">avail_out</a>, it must be called again after making room in the
+ output buffer because there might be more output pending.
+ <p>
+
+ If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, all pending output is
+ flushed to the output buffer and the output is aligned on a byte boundary, so
+ that the decompressor can get all input data available so far. (In particular
+ <a href="#avail_in">avail_in</a> is zero after the call if enough output space has been provided
+ before the call.) Flushing may degrade compression for some compression
+ algorithms and so it should be used only when necessary.
+ <p>
+
+ If flush is set to <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>, all output is flushed as with
+ <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, and the compression <a href="#state">state</a> is reset so that decompression can
+ restart from this point if previous compressed data has been damaged or if
+ random access is desired. Using <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a> too often can seriously degrade
+ the compression.
+ <p>
+
+ If <a href="#deflate">deflate</a> returns with <a href="#avail_out">avail_out</a> == 0, this function must be called again
+ with the same value of the flush parameter and more output space (updated
+ <a href="#avail_out">avail_out</a>), until the flush is complete (<a href="#deflate">deflate</a> returns with non-zero
+ <a href="#avail_out">avail_out</a>).
+ <p>
+
+ If the parameter flush is set to <a href="#Z_FINISH">Z_FINISH</a>, pending input is processed,
+ pending output is flushed and <a href="#deflate">deflate</a> returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> if there
+ was enough output space ; if <a href="#deflate">deflate</a> returns with <a href="#Z_OK">Z_OK</a>, this function must be
+ called again with <a href="#Z_FINISH">Z_FINISH</a> and more output space (updated <a href="#avail_out">avail_out</a>) but no
+ more input data, until it returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> or an error. After
+ <a href="#deflate">deflate</a> has returned <a href="#Z_STREAM_END">Z_STREAM_END</a>, the only possible operations on the
+ stream are <a href="#deflateReset">deflateReset</a> or <a href="#deflateEnd">deflateEnd</a>.
+ <p>
+
+ <a href="#Z_FINISH">Z_FINISH</a> can be used immediately after <a href="#deflateInit">deflateInit</a> if all the compression
+ is to be done in a single step. In this case, <a href="#avail_out">avail_out</a> must be at least
+ 0.1% larger than <a href="#avail_in">avail_in</a> plus 12 bytes. If <a href="#deflate">deflate</a> does not return
+ <a href="#Z_STREAM_END">Z_STREAM_END</a>, then it must be called again as described above.
+ <p>
+
+ <a href="#deflate">deflate</a>() sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all input read
+ so far (that is, <a href="#total_in">total_in</a> bytes).
+ <p>
+
+ <a href="#deflate">deflate</a>() may update <a href="#data_type">data_type</a> if it can make a good guess about
+ the input data type (<a href="#Z_ASCII">Z_ASCII</a> or <a href="#Z_BINARY">Z_BINARY</a>). In doubt, the data is considered
+ binary. This field is only for information purposes and does not affect
+ the compression algorithm in any manner.
+ <p>
+
+ <a href="#deflate">deflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input
+ processed or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if all input has been
+ consumed and all output has been produced (only when flush is set to
+ <a href="#Z_FINISH">Z_FINISH</a>), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a> was inconsistent (for example
+ if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible
+ (for example <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> was zero).
+ <p>
+
+<font color="Blue"><dt> int <a name="deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+ <p>
+
+ <a href="#deflateEnd">deflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the
+ stream <a href="#state">state</a> was inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the stream was freed
+ prematurely (some input or output was discarded). In the error case,
+ <a href="#msg">msg</a> may be set but then points to a static string (which must not be
+ deallocated).
+ <p>
+
+<font color="Blue"><dt> int <a name="inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+ Initializes the internal stream <a href="#state">state</a> for decompression. The fields
+ <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
+ the caller. If <a href="#next_in">next_in</a> is not <a href="#Z_NULL">Z_NULL</a> and <a href="#avail_in">avail_in</a> is large enough (the exact
+ value depends on the compression method), <a href="#inflateInit">inflateInit</a> determines the
+ compression method from the zlib header and allocates all data structures
+ accordingly ; otherwise the allocation will be deferred to the first call of
+ <a href="#inflate">inflate</a>. If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#inflateInit">inflateInit</a> updates them to
+ use default allocation functions.
+ <p>
+
+ <a href="#inflateInit">inflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+ memory, <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version is incompatible with the
+ version assumed by the caller. <a href="#msg">msg</a> is set to null if there is no error
+ message. <a href="#inflateInit">inflateInit</a> does not perform any decompression apart from reading
+ the zlib header if present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and
+ <a href="#avail_in">avail_in</a> may be modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)
+ <p>
+
+<font color="Blue"><dt> int <a name="inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
+<dd>
+ <a href="#inflate">inflate</a> decompresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may some
+ introduce some output latency (reading input without producing any output)
+ except when forced to flush.
+ <p>
+
+ The detailed semantics are as follows. <a href="#inflate">inflate</a> performs one or both of the
+ following actions:
+
+ <ul>
+ <li> Decompress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), <a href="#next_in">next_in</a> is updated and processing
+ will resume at this point for the next call of <a href="#inflate">inflate</a>().
+
+ <li> Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and
+ <a href="#avail_out">avail_out</a> accordingly. <a href="#inflate">inflate</a>() provides as much output as possible,
+ until there is no more input data or no more space in the output buffer
+ (see below about the flush parameter).
+ </ul> <p>
+
+ Before the call of <a href="#inflate">inflate</a>(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating the next_* and avail_* values accordingly.
+ The application can consume the uncompressed output when it wants, for
+ example when the output buffer is full (<a href="#avail_out">avail_out</a> == 0), or after each
+ call of <a href="#inflate">inflate</a>(). If <a href="#inflate">inflate</a> returns <a href="#Z_OK">Z_OK</a> and with zero <a href="#avail_out">avail_out</a>, it
+ must be called again after making room in the output buffer because there
+ might be more output pending.
+ <p>
+
+ If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, <a href="#inflate">inflate</a> flushes as much
+ output as possible to the output buffer. The flushing behavior of <a href="#inflate">inflate</a> is
+ not specified for values of the flush parameter other than <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>
+ and <a href="#Z_FINISH">Z_FINISH</a>, but the current implementation actually flushes as much output
+ as possible anyway.
+ <p>
+
+ <a href="#inflate">inflate</a>() should normally be called until it returns <a href="#Z_STREAM_END">Z_STREAM_END</a> or an
+ error. However if all decompression is to be performed in a single step
+ (a single call of <a href="#inflate">inflate</a>), the parameter flush should be set to
+ <a href="#Z_FINISH">Z_FINISH</a>. In this case all pending input is processed and all pending
+ output is flushed ; <a href="#avail_out">avail_out</a> must be large enough to hold all the
+ uncompressed data. (The size of the uncompressed data may have been saved
+ by the compressor for this purpose.) The next operation on this stream must
+ be <a href="#inflateEnd">inflateEnd</a> to deallocate the decompression <a href="#state">state</a>. The use of <a href="#Z_FINISH">Z_FINISH</a>
+ is never required, but can be used to inform <a href="#inflate">inflate</a> that a faster routine
+ may be used for the single <a href="#inflate">inflate</a>() call.
+ <p>
+
+ If a preset dictionary is needed at this point (see <a href="#inflateSetDictionary">inflateSetDictionary</a>
+ below), <a href="#inflate">inflate</a> sets strm-<a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of the
+ dictionary chosen by the compressor and returns <a href="#Z_NEED_DICT">Z_NEED_DICT</a> ; otherwise
+ it sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all output produced
+ so far (that is, <a href="#total_out">total_out</a> bytes) and returns <a href="#Z_OK">Z_OK</a>, <a href="#Z_STREAM_END">Z_STREAM_END</a> or
+ an error code as described below. At the end of the stream, <a href="#inflate">inflate</a>()
+ checks that its computed <a href="#adler32">adler32</a> checksum is equal to that saved by the
+ compressor and returns <a href="#Z_STREAM_END">Z_STREAM_END</a> only if the checksum is correct.
+ <p>
+
+ <a href="#inflate">inflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input processed
+ or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if the end of the compressed data has
+ been reached and all uncompressed output has been produced, <a href="#Z_NEED_DICT">Z_NEED_DICT</a> if a
+ preset dictionary is needed at this point, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was
+ corrupted (input stream not conforming to the zlib format or incorrect
+ <a href="#adler32">adler32</a> checksum), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent
+ (for example if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+ enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible or if there was not
+ enough room in the output buffer when <a href="#Z_FINISH">Z_FINISH</a> is used. In the <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a>
+ case, the application may then call <a href="#inflateSync">inflateSync</a> to look for a good
+ compression block.
+ <p>
+
+<font color="Blue"><dt> int <a name="inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+ <p>
+
+ <a href="#inflateEnd">inflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a>
+ was inconsistent. In the error case, <a href="#msg">msg</a> may be set but then points to a
+ static string (which must not be deallocated).
+</dl>
+<hr>
+<a name="Advanced functions"><h2> Advanced functions </h2>
+ The following functions are needed only in some special applications.
+<h3> Function list </h3>
+<ul>
+<li> int <a href="#deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm,
+<li> int <a href="#deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
+<li> int <a href="#deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);
+<li> int <a href="#deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int <a href="#deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);
+<li> int <a href="#inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);
+<li> int <a href="#inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
+<li> int <a href="#inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int <a href="#inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
+
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> int <a name="deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int method, int windowBits, int memLevel, int strategy);</font>
+
+<dd> This is another version of <a href="#deflateInit">deflateInit</a> with more compression options. The
+ fields <a href="#next_in">next_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
+ the caller.<p>
+
+ The method parameter is the compression method. It must be <a href="#Z_DEFLATED">Z_DEFLATED</a> in
+ this version of the library.<p>
+
+ The windowBits parameter is the base two logarithm of the window size
+ (the size of the history buffer). It should be in the range 8..15 for this
+ version of the library. Larger values of this parameter result in better
+ compression at the expense of memory usage. The default value is 15 if
+ <a href="#deflateInit">deflateInit</a> is used instead.<p>
+
+ The memLevel parameter specifies how much memory should be allocated
+ for the internal compression <a href="#state">state</a>. memLevel=1 uses minimum memory but
+ is slow and reduces compression ratio ; memLevel=9 uses maximum memory
+ for optimal speed. The default value is 8. See zconf.h for total memory
+ usage as a function of windowBits and memLevel.<p>
+
+ The strategy parameter is used to tune the compression algorithm. Use the
+ value <a href="#Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> for normal data, <a href="#Z_FILTERED">Z_FILTERED</a> for data produced by a
+ filter (or predictor), or <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> to force Huffman encoding only (no
+ string match). Filtered data consists mostly of small values with a
+ somewhat random distribution. In this case, the compression algorithm is
+ tuned to <a href="#compress">compress</a> them better. The effect of <a href="#Z_FILTERED">Z_FILTERED</a> is to force more
+ Huffman coding and less string matching ; it is somewhat intermediate
+ between Z_DEFAULT and <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>. The strategy parameter only affects
+ the compression ratio but not the correctness of the compressed output even
+ if it is not set appropriately.<p>
+
+ <a href="#deflateInit2">deflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+ memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as an invalid
+ method). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit2">deflateInit2</a> does
+ not perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
+
+<font color="Blue"><dt> int <a name="deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
+<dd>
+ Initializes the compression dictionary from the given byte sequence
+ without producing any compressed output. This function must be called
+ immediately after <a href="#deflateInit">deflateInit</a>, <a href="#deflateInit2">deflateInit2</a> or <a href="#deflateReset">deflateReset</a>, before any
+ call of <a href="#deflate">deflate</a>. The compressor and decompressor must use exactly the same
+ dictionary (see <a href="#inflateSetDictionary">inflateSetDictionary</a>).<p>
+
+ The dictionary should consist of strings (byte sequences) that are likely
+ to be encountered later in the data to be compressed, with the most commonly
+ used strings preferably put towards the end of the dictionary. Using a
+ dictionary is most useful when the data to be compressed is short and can be
+ predicted with good accuracy ; the data can then be compressed better than
+ with the default empty dictionary.<p>
+
+ Depending on the size of the compression data structures selected by
+ <a href="#deflateInit">deflateInit</a> or <a href="#deflateInit2">deflateInit2</a>, a part of the dictionary may in effect be
+ discarded, for example if the dictionary is larger than the window size in
+ <a href="#deflate">deflate</a> or deflate2. Thus the strings most likely to be useful should be
+ put at the end of the dictionary, not at the front.<p>
+
+ Upon return of this function, strm-> <a href="#adler">adler</a> is set to the Adler32 value
+ of the dictionary ; the decompressor may later use this value to determine
+ which dictionary has been used by the compressor. (The Adler32 value
+ applies to the whole dictionary even if only a subset of the dictionary is
+ actually used by the compressor.)<p>
+
+ <a href="#deflateSetDictionary">deflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
+ parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
+ inconsistent (for example if <a href="#deflate">deflate</a> has already been called for this stream
+ or if the compression method is bsort). <a href="#deflateSetDictionary">deflateSetDictionary</a> does not
+ perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
+
+<font color="Blue"><dt> int <a name="deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);</font>
+<dd>
+ Sets the destination stream as a complete copy of the source stream.<p>
+
+ This function can be useful when several compression strategies will be
+ tried, for example when there are several ways of pre-processing the input
+ data with a filter. The streams that will be discarded should then be freed
+ by calling <a href="#deflateEnd">deflateEnd</a>. Note that <a href="#deflateCopy">deflateCopy</a> duplicates the internal
+ compression <a href="#state">state</a> which can be quite large, so this strategy is slow and
+ can consume lots of memory.<p>
+
+ <a href="#deflateCopy">deflateCopy</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+ enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source stream <a href="#state">state</a> was inconsistent
+ (such as <a href="#zalloc">zalloc</a> being NULL). <a href="#msg">msg</a> is left unchanged in both source and
+ destination.<p>
+
+<font color="Blue"><dt> int <a name="deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd> This function is equivalent to <a href="#deflateEnd">deflateEnd</a> followed by <a href="#deflateInit">deflateInit</a>,
+ but does not free and reallocate all the internal compression <a href="#state">state</a>.
+ The stream will keep the same compression level and any other attributes
+ that may have been set by <a href="#deflateInit2">deflateInit2</a>.<p>
+
+ <a href="#deflateReset">deflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+ stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).<p>
+
+<font color="Blue"><dt> int <a name="deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);</font>
+<dd>
+ Dynamically update the compression level and compression strategy. The
+ interpretation of level and strategy is as in <a href="#deflateInit2">deflateInit2</a>. This can be
+ used to switch between compression and straight copy of the input data, or
+ to switch to a different kind of input data requiring a different
+ strategy. If the compression level is changed, the input available so far
+ is compressed with the old level (and may be flushed); the new level will
+ take effect only at the next call of <a href="#deflate">deflate</a>().<p>
+
+ Before the call of <a href="#deflateParams">deflateParams</a>, the stream <a href="#state">state</a> must be set as for
+ a call of <a href="#deflate">deflate</a>(), since the currently available input may have to
+ be compressed and flushed. In particular, strm-> <a href="#avail_out">avail_out</a> must be
+ non-zero.<p>
+
+ <a href="#deflateParams">deflateParams</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+ stream <a href="#state">state</a> was inconsistent or if a parameter was invalid, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
+ if strm->avail_out was zero.<p>
+
+<font color="Blue"><dt> int <a name="inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);</font>
+
+<dd> This is another version of <a href="#inflateInit">inflateInit</a> with an extra parameter. The
+ fields <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized
+ before by the caller.<p>
+
+ The windowBits parameter is the base two logarithm of the maximum window
+ size (the size of the history buffer). It should be in the range 8..15 for
+ this version of the library. The default value is 15 if <a href="#inflateInit">inflateInit</a> is used
+ instead. If a compressed stream with a larger window size is given as
+ input, <a href="#inflate">inflate</a>() will return with the error code <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> instead of
+ trying to allocate a larger window.<p>
+
+ <a href="#inflateInit2">inflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+ memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as a negative
+ memLevel). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#inflateInit2">inflateInit2</a>
+ does not perform any decompression apart from reading the zlib header if
+ present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> may be
+ modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)<p>
+
+<font color="Blue"><dt> int <a name="inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
+<dd>
+ Initializes the decompression dictionary from the given uncompressed byte
+ sequence. This function must be called immediately after a call of <a href="#inflate">inflate</a>
+ if this call returned <a href="#Z_NEED_DICT">Z_NEED_DICT</a>. The dictionary chosen by the compressor
+ can be determined from the Adler32 value returned by this call of
+ <a href="#inflate">inflate</a>. The compressor and decompressor must use exactly the same
+ dictionary (see <a href="#deflateSetDictionary">deflateSetDictionary</a>).<p>
+
+ <a href="#inflateSetDictionary">inflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
+ parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
+ inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the given dictionary doesn't match the
+ expected one (incorrect Adler32 value). <a href="#inflateSetDictionary">inflateSetDictionary</a> does not
+ perform any decompression: this will be done by subsequent calls of
+ <a href="#inflate">inflate</a>().<p>
+
+<font color="Blue"><dt> int <a name="inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+
+<dd> Skips invalid compressed data until a full flush point (see above the
+ description of <a href="#deflate">deflate</a> with <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>) can be found, or until all
+ available input is skipped. No output is provided.<p>
+
+ <a href="#inflateSync">inflateSync</a> returns <a href="#Z_OK">Z_OK</a> if a full flush point has been found, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
+ if no more input was provided, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if no flush point has been found,
+ or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent. In the success
+ case, the application may save the current current value of <a href="#total_in">total_in</a> which
+ indicates where valid compressed data was found. In the error case, the
+ application may repeatedly call <a href="#inflateSync">inflateSync</a>, providing more input each time,
+ until success or end of the input data.<p>
+
+<font color="Blue"><dt> int <a name="inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+ This function is equivalent to <a href="#inflateEnd">inflateEnd</a> followed by <a href="#inflateInit">inflateInit</a>,
+ but does not free and reallocate all the internal decompression <a href="#state">state</a>.
+ The stream will keep attributes that may have been set by <a href="#inflateInit2">inflateInit2</a>.
+ <p>
+
+ <a href="#inflateReset">inflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+ stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).
+ <p>
+</dl>
+
+<hr>
+<a name="Checksum functions"><h2> Checksum functions </h2>
+ These functions are not related to compression but are exported
+ anyway because they might be useful in applications using the
+ compression library.
+<h3> Function list </h3>
+<ul>
+<li> uLong <a href="#adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);
+<li> uLong <a href="#crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> uLong <a name="adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);</font>
+<dd>
+ Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+ return the updated checksum. If buf is NULL, this function returns
+ the required initial value for the checksum.
+ <p>
+ An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+ much faster. Usage example:
+ <pre>
+
+ uLong <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
+
+ while (read_buffer(buffer, length) != EOF) {
+ <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(<a href="#adler">adler</a>, buffer, length);
+ }
+ if (<a href="#adler">adler</a> != original_adler) error();
+ </pre>
+
+<font color="Blue"><dt> uLong <a name="crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);</font>
+<dd>
+ Update a running crc with the bytes buf[0..len-1] and return the updated
+ crc. If buf is NULL, this function returns the required initial value
+ for the crc. Pre- and post-conditioning (one's complement) is performed
+ within this function so it shouldn't be done by the application.
+ Usage example:
+ <pre>
+
+ uLong crc = <a href="#crc32">crc32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
+
+ while (read_buffer(buffer, length) != EOF) {
+ crc = <a href="#crc32">crc32</a>(crc, buffer, length);
+ }
+ if (crc != original_crc) error();
+ </pre>
+</dl>
+<hr>
+<a name="struct z_stream_s"><h2> struct z_stream_s </h2>
+<font color="Blue">
+<a name="z_stream_s">
+<pre>
+typedef struct z_stream_s {
+ Bytef *<a name="next_in">next_in</a>; /* next input byte */
+ uInt <a name="avail_in">avail_in</a>; /* number of bytes available at <a href="#next_in">next_in</a> */
+ uLong <a name="total_in">total_in</a>; /* total nb of input bytes read so far */
+
+ Bytef *<a name="next_out">next_out</a>; /* next output byte should be put there */
+ uInt <a name="avail_out">avail_out</a>; /* remaining free space at <a href="#next_out">next_out</a> */
+ uLong <a name="total_out">total_out</a>; /* total nb of bytes output so far */
+
+ char *<a name="msg">msg</a>; /* last error message, NULL if no error */
+ struct internal_state FAR *<a name="state">state</a>; /* not visible by applications */
+
+ alloc_func <a name="zalloc">zalloc</a>; /* used to allocate the internal <a href="#state">state</a> */
+ free_func <a name="zfree">zfree</a>; /* used to free the internal <a href="#state">state</a> */
+ voidpf <a name="opaque">opaque</a>; /* private data object passed to <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> */
+
+ int <a name="data_type">data_type</a>; /* best guess about the data type: ascii or binary */
+ uLong <a name="adler">adler</a>; /* <a href="#adler32">adler32</a> value of the uncompressed data */
+ uLong <a name="reserved">reserved</a>; /* <a href="#reserved">reserved</a> for future use */
+} <a href="#z_stream_s">z_stream</a> ;
+
+typedef <a href="#z_stream_s">z_stream</a> FAR * <a name="z_streamp">z_streamp</a>; ΓΏ
+</pre>
+</font>
+ The application must update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> when <a href="#avail_in">avail_in</a> has
+ dropped to zero. It must update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> when <a href="#avail_out">avail_out</a>
+ has dropped to zero. The application must initialize <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and
+ <a href="#opaque">opaque</a> before calling the init function. All other fields are set by the
+ compression library and must not be updated by the application. <p>
+
+ The <a href="#opaque">opaque</a> value provided by the application will be passed as the first
+ parameter for calls of <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a>. This can be useful for custom
+ memory management. The compression library attaches no meaning to the
+ <a href="#opaque">opaque</a> value. <p>
+
+ <a href="#zalloc">zalloc</a> must return <a href="#Z_NULL">Z_NULL</a> if there is not enough memory for the object.
+ If zlib is used in a multi-threaded application, <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be
+ thread safe. <p>
+
+ On 16-bit systems, the functions <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be able to allocate
+ exactly 65536 bytes, but will not be required to allocate more than this
+ if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+ pointers returned by <a href="#zalloc">zalloc</a> for objects of exactly 65536 bytes *must*
+ have their offset normalized to zero. The default allocation function
+ provided by this library ensures this (see zutil.c). To reduce memory
+ requirements and avoid any allocation of 64K objects, at the expense of
+ compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+ <p>
+
+ The fields <a href="#total_in">total_in</a> and <a href="#total_out">total_out</a> can be used for statistics or
+ progress reports. After compression, <a href="#total_in">total_in</a> holds the total size of
+ the uncompressed data and may be saved for use in the decompressor
+ (particularly if the decompressor wants to decompress everything in
+ a single step). <p>
+
+<hr>
+<a name="Constants"><h2> Constants </h2>
+<font color="Blue">
+<pre>
+#define <a name="Z_NO_FLUSH">Z_NO_FLUSH</a> 0
+#define <a name="Z_PARTIAL_FLUSH">Z_PARTIAL_FLUSH</a> 1
+ /* will be removed, use <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> instead */
+#define <a name="Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> 2
+#define <a name="Z_FULL_FLUSH">Z_FULL_FLUSH</a> 3
+#define <a name="Z_FINISH">Z_FINISH</a> 4
+/* Allowed flush values ; see <a href="#deflate">deflate</a>() below for details */
+
+#define <a name="Z_OK">Z_OK</a> 0
+#define <a name="Z_STREAM_END">Z_STREAM_END</a> 1
+#define <a name="Z_NEED_DICT">Z_NEED_DICT</a> 2
+#define <a name="Z_ERRNO">Z_ERRNO</a> (-1)
+#define <a name="Z_STREAM_ERROR">Z_STREAM_ERROR</a> (-2)
+#define <a name="Z_DATA_ERROR">Z_DATA_ERROR</a> (-3)
+#define <a name="Z_MEM_ERROR">Z_MEM_ERROR</a> (-4)
+#define <a name="Z_BUF_ERROR">Z_BUF_ERROR</a> (-5)
+#define <a name="Z_VERSION_ERROR">Z_VERSION_ERROR</a> (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define <a name="Z_NO_COMPRESSION">Z_NO_COMPRESSION</a> 0
+#define <a name="Z_BEST_SPEED">Z_BEST_SPEED</a> 1
+#define <a name="Z_BEST_COMPRESSION">Z_BEST_COMPRESSION</a> 9
+#define <a name="Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> (-1)
+/* compression levels */
+
+#define <a name="Z_FILTERED">Z_FILTERED</a> 1
+#define <a name="Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> 2
+#define <a name="Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> 0
+/* compression strategy ; see <a href="#deflateInit2">deflateInit2</a>() below for details */
+
+#define <a name="Z_BINARY">Z_BINARY</a> 0
+#define <a name="Z_ASCII">Z_ASCII</a> 1
+#define <a name="Z_UNKNOWN">Z_UNKNOWN</a> 2
+/* Possible values of the <a href="#data_type">data_type</a> field */
+
+#define <a name="Z_DEFLATED">Z_DEFLATED</a> 8
+/* The <a href="#deflate">deflate</a> compression method (the only one supported in this version) */
+
+#define <a name="Z_NULL">Z_NULL</a> 0 /* for initializing <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a>, <a href="#opaque">opaque</a> */
+
+#define <a name="zlib_version">zlib_version</a> <a href="#zlibVersion">zlibVersion</a>()
+/* for compatibility with versions less than 1.0.2 */
+</pre>
+</font>
+
+<hr>
+<a name="Misc"><h2> Misc </h2>
+ <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a> are macros to allow checking the zlib version
+ and the compiler's view of <a href="#z_stream_s">z_stream</a>.
+ <p>
+ Other functions:
+ <dl>
+ <font color="Blue"><dt> const char * <a name="zError">zError</a> (int err);</font>
+ <font color="Blue"><dt> int <a name="inflateSyncPoint">inflateSyncPoint</a> (<a href="#z_streamp">z_streamp</a> z);</font>
+ <font color="Blue"><dt> const uLongf * <a name="get_crc_table">get_crc_table</a> (void);</font>
+ </dl>
+ <hr>
+ <font size="-1">
+ Last update: Wed Oct 13 20:42:34 1999<br>
+ piapi@csie.ntu.edu.tw
+ </font>
+
+</body>
+</html>
+++ /dev/null
-# Makefile for zlib under OS/2 using GCC (PGCC)
-# For conditions of distribution and use, see copyright notice in zlib.h
-
-# To compile and test, type:
-# cp Makefile.os2 ..
-# cd ..
-# make -f Makefile.os2 test
-
-# This makefile will build a static library z.lib, a shared library
-# z.dll and a import library zdll.lib. You can use either z.lib or
-# zdll.lib by specifying either -lz or -lzdll on gcc's command line
-
-CC=gcc -Zomf -s
-
-CFLAGS=-O6 -Wall
-#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-g -DDEBUG
-#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
-# -Wstrict-prototypes -Wmissing-prototypes
-
-#################### BUG WARNING: #####################
-## infcodes.c hits a bug in pgcc-1.0, so you have to use either
-## -O# where # <= 4 or one of (-fno-ommit-frame-pointer or -fno-force-mem)
-## This bug is reportedly fixed in pgcc >1.0, but this was not tested
-CFLAGS+=-fno-force-mem
-
-LDFLAGS=-s -L. -lzdll -Zcrtdll
-LDSHARED=$(CC) -s -Zomf -Zdll -Zcrtdll
-
-VER=1.1.0
-ZLIB=z.lib
-SHAREDLIB=z.dll
-SHAREDLIBIMP=zdll.lib
-LIBS=$(ZLIB) $(SHAREDLIB) $(SHAREDLIBIMP)
-
-AR=emxomfar cr
-IMPLIB=emximp
-RANLIB=echo
-TAR=tar
-SHELL=bash
-
-prefix=/usr/local
-exec_prefix = $(prefix)
-
-OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
- zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
-
-TEST_OBJS = example.o minigzip.o
-
-DISTFILES = README INDEX ChangeLog configure Make*[a-z0-9] *.[ch] descrip.mms \
- algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
- nt/Makefile.nt nt/zlib.dnt contrib/README.contrib contrib/*.txt \
- contrib/asm386/*.asm contrib/asm386/*.c \
- contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/iostream/*.cpp \
- contrib/iostream/*.h contrib/iostream2/*.h contrib/iostream2/*.cpp \
- contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32
-
-all: example.exe minigzip.exe
-
-test: all
- @LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
- echo hello world | ./minigzip | ./minigzip -d || \
- echo ' *** minigzip test FAILED ***' ; \
- if ./example; then \
- echo ' *** zlib test OK ***'; \
- else \
- echo ' *** zlib test FAILED ***'; \
- fi
-
-$(ZLIB): $(OBJS)
- $(AR) $@ $(OBJS)
- -@ ($(RANLIB) $@ || true) >/dev/null 2>&1
-
-$(SHAREDLIB): $(OBJS) os2/z.def
- $(LDSHARED) -o $@ $^
-
-$(SHAREDLIBIMP): os2/z.def
- $(IMPLIB) -o $@ $^
-
-example.exe: example.o $(LIBS)
- $(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
-
-minigzip.exe: minigzip.o $(LIBS)
- $(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
-
-clean:
- rm -f *.o *~ example minigzip libz.a libz.so* foo.gz
-
-distclean: clean
-
-zip:
- mv Makefile Makefile~; cp -p Makefile.in Makefile
- rm -f test.c ztest*.c
- v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
- zip -ul9 zlib$$v $(DISTFILES)
- mv Makefile~ Makefile
-
-dist:
- mv Makefile Makefile~; cp -p Makefile.in Makefile
- rm -f test.c ztest*.c
- d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
- rm -f $$d.tar.gz; \
- if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
- files=""; \
- for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
- cd ..; \
- GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
- if test ! -d $$d; then rm -f $$d; fi
- mv Makefile~ Makefile
-
-tags:
- etags *.[ch]
-
-depend:
- makedepend -- $(CFLAGS) -- *.[ch]
-
-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o: zlib.h zconf.h
-compress.o: zlib.h zconf.h
-crc32.o: zlib.h zconf.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-example.o: zlib.h zconf.h
-gzio.o: zutil.h zlib.h zconf.h
-infblock.o: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
-infcodes.o: zutil.h zlib.h zconf.h
-infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h
-inffast.o: infblock.h infcodes.h infutil.h inffast.h
-inflate.o: zutil.h zlib.h zconf.h infblock.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
-minigzip.o: zlib.h zconf.h
-trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
-uncompr.o: zlib.h zconf.h
-zutil.o: zutil.h zlib.h zconf.h
+++ /dev/null
-;
-; Slightly modified version of ../nt/zlib.dnt :-)
-;
-
-LIBRARY Z
-DESCRIPTION "Zlib compression library for OS/2"
-CODE PRELOAD MOVEABLE DISCARDABLE
-DATA PRELOAD MOVEABLE MULTIPLE
-
-EXPORTS
- adler32
- compress
- crc32
- deflate
- deflateCopy
- deflateEnd
- deflateInit2_
- deflateInit_
- deflateParams
- deflateReset
- deflateSetDictionary
- gzclose
- gzdopen
- gzerror
- gzflush
- gzopen
- gzread
- gzwrite
- inflate
- inflateEnd
- inflateInit2_
- inflateInit_
- inflateReset
- inflateSetDictionary
- inflateSync
- uncompress
- zlibVersion
- gzprintf
- gzputc
- gzgetc
- gzseek
- gzrewind
- gztell
- gzeof
- gzsetparams
- zError
- inflateSyncPoint
- get_crc_table
- compress2
- gzputs
- gzgets
/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2002 Jean-loup Gailly
+ * Copyright (C) 1995-2003 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#endif /* DEBUG */
-#define MAX(a,b) (a >= b ? a : b)
/* the arguments must not have side effects */
/* ===========================================================================
/* Create a new node father of n and m */
tree[node].Freq = tree[n].Freq + tree[m].Freq;
- s->depth[node] = (uch) (MAX(s->depth[n], s->depth[m]) + 1);
+ s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
+ s->depth[n] : s->depth[m]) + 1);
tree[n].Dad = tree[m].Dad = (ush)node;
#ifdef DUMP_BL_TREE
if (tree == s->bl_tree) {
*/
max_blindex = build_bl_tree(s);
- /* Determine the best encoding. Compute first the block length in bytes*/
+ /* Determine the best encoding. Compute the block lengths in bytes. */
opt_lenb = (s->opt_len+3+7)>>3;
static_lenb = (s->static_len+3+7)>>3;
/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
err = inflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
inflateEnd(&stream);
- return err == Z_OK ? Z_BUF_ERROR : err;
+ if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
+ return Z_DATA_ERROR;
+ return err;
}
*destLen = stream.total_out;
/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
*/
#ifdef Z_PREFIX
-# define deflateInit_ z_deflateInit_
-# define deflate z_deflate
-# define deflateEnd z_deflateEnd
-# define inflateInit_ z_inflateInit_
-# define inflate z_inflate
-# define inflateEnd z_inflateEnd
-# define deflateInit2_ z_deflateInit2_
+# define deflateInit_ z_deflateInit_
+# define deflate z_deflate
+# define deflateEnd z_deflateEnd
+# define inflateInit_ z_inflateInit_
+# define inflate z_inflate
+# define inflateEnd z_inflateEnd
+# define deflateInit2_ z_deflateInit2_
# define deflateSetDictionary z_deflateSetDictionary
-# define deflateCopy z_deflateCopy
-# define deflateReset z_deflateReset
-# define deflateParams z_deflateParams
-# define inflateInit2_ z_inflateInit2_
+# define deflateCopy z_deflateCopy
+# define deflateReset z_deflateReset
+# define deflateParams z_deflateParams
+# define deflateBound z_deflateBound
+# define inflateInit2_ z_inflateInit2_
# define inflateSetDictionary z_inflateSetDictionary
-# define inflateSync z_inflateSync
+# define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint
-# define inflateReset z_inflateReset
-# define compress z_compress
-# define compress2 z_compress2
-# define uncompress z_uncompress
-# define adler32 z_adler32
-# define crc32 z_crc32
+# define inflateCopy z_inflateCopy
+# define inflateReset z_inflateReset
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# define uncompress z_uncompress
+# define adler32 z_adler32
+# define crc32 z_crc32
# define get_crc_table z_get_crc_table
-# define Byte z_Byte
-# define uInt z_uInt
-# define uLong z_uLong
-# define Bytef z_Bytef
-# define charf z_charf
-# define intf z_intf
-# define uIntf z_uIntf
-# define uLongf z_uLongf
-# define voidpf z_voidpf
-# define voidp z_voidp
+# define Byte z_Byte
+# define uInt z_uInt
+# define uLong z_uLong
+# define Bytef z_Bytef
+# define charf z_charf
+# define intf z_intf
+# define uIntf z_uIntf
+# define uLongf z_uLongf
+# define voidpf z_voidpf
+# define voidp z_voidp
#endif
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
# endif
#endif
+#if defined __HOS_AIX__
+# ifndef STDC
+# define STDC
+# endif
+#endif
+
#ifndef STDC
# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
-# define const
+# define const /* note: need a more gentle solution here */
# endif
#endif
# define FAR
#endif
-#if !defined(MACOS) && !defined(TARGET_OS_MAC)
+#if !defined(__MACTYPES__)
typedef unsigned char Byte; /* 8 bits */
#endif
typedef unsigned int uInt; /* 16 bits or more */
typedef uLong FAR uLongf;
#ifdef STDC
+ typedef void const *voidpc;
typedef void FAR *voidpf;
typedef void *voidp;
#else
+ typedef Byte const *voidpc;
typedef Byte FAR *voidpf;
typedef Byte *voidp;
#endif
-#ifdef HAVE_UNISTD_H
+#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
# include <sys/types.h> /* for off_t */
# include <unistd.h> /* for SEEK_* and off_t */
# define z_off_t off_t
# pragma map(deflateInit_,"DEIN")
# pragma map(deflateInit2_,"DEIN2")
# pragma map(deflateEnd,"DEEND")
+# pragma map(deflateBound,"DEBND")
# pragma map(inflateInit_,"ININ")
# pragma map(inflateInit2_,"ININ2")
# pragma map(inflateEnd,"INEND")
# pragma map(inflateSync,"INSY")
# pragma map(inflateSetDictionary,"INSEDI")
-# pragma map(inflate_blocks,"INBL")
-# pragma map(inflate_blocks_new,"INBLNE")
-# pragma map(inflate_blocks_free,"INBLFR")
-# pragma map(inflate_blocks_reset,"INBLRE")
-# pragma map(inflate_codes_free,"INCOFR")
-# pragma map(inflate_codes,"INCO")
+# pragma map(compressBound,"CMBND")
+# pragma map(inflate_table,"INTABL")
# pragma map(inflate_fast,"INFA")
-# pragma map(inflate_flush,"INFLU")
-# pragma map(inflate_mask,"INMA")
-# pragma map(inflate_set_dictionary,"INSEDI2")
# pragma map(inflate_copyright,"INCOPY")
-# pragma map(inflate_trees_bits,"INTRBI")
-# pragma map(inflate_trees_dynamic,"INTRDY")
-# pragma map(inflate_trees_fixed,"INTRFI")
-# pragma map(inflate_trees_free,"INTRFR")
#endif
#endif /* _ZCONF_H */
--- /dev/null
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#ifndef _ZCONF_H
+#define _ZCONF_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ */
+#ifdef Z_PREFIX
+# define deflateInit_ z_deflateInit_
+# define deflate z_deflate
+# define deflateEnd z_deflateEnd
+# define inflateInit_ z_inflateInit_
+# define inflate z_inflate
+# define inflateEnd z_inflateEnd
+# define deflateInit2_ z_deflateInit2_
+# define deflateSetDictionary z_deflateSetDictionary
+# define deflateCopy z_deflateCopy
+# define deflateReset z_deflateReset
+# define deflateParams z_deflateParams
+# define deflateBound z_deflateBound
+# define inflateInit2_ z_inflateInit2_
+# define inflateSetDictionary z_inflateSetDictionary
+# define inflateSync z_inflateSync
+# define inflateSyncPoint z_inflateSyncPoint
+# define inflateCopy z_inflateCopy
+# define inflateReset z_inflateReset
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# define uncompress z_uncompress
+# define adler32 z_adler32
+# define crc32 z_crc32
+# define get_crc_table z_get_crc_table
+
+# define Byte z_Byte
+# define uInt z_uInt
+# define uLong z_uLong
+# define Bytef z_Bytef
+# define charf z_charf
+# define intf z_intf
+# define uIntf z_uIntf
+# define uLongf z_uLongf
+# define voidpf z_voidpf
+# define voidp z_voidp
+#endif
+
+#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
+# define WIN32
+#endif
+#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
+# ifndef __32BIT__
+# define __32BIT__
+# endif
+#endif
+#if defined(__MSDOS__) && !defined(MSDOS)
+# define MSDOS
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#if defined(MSDOS) && !defined(__32BIT__)
+# define MAXSEG_64K
+#endif
+#ifdef MSDOS
+# define UNALIGNED_OK
+#endif
+
+#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC)
+# define STDC
+#endif
+#if defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)
+# ifndef STDC
+# define STDC
+# endif
+#endif
+
+#if defined __HOS_AIX__
+# ifndef STDC
+# define STDC
+# endif
+#endif
+
+#ifndef STDC
+# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+# define const /* note: need a more gentle solution here */
+# endif
+#endif
+
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
+# define NO_DUMMY_DECL
+#endif
+
+/* Old Borland C incorrectly complains about missing returns: */
+#if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
+# define NEED_DUMMY_RETURN
+#endif
+
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+# ifdef MAXSEG_64K
+# define MAX_MEM_LEVEL 8
+# else
+# define MAX_MEM_LEVEL 9
+# endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+# define MAX_WBITS 15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+ (1 << (windowBits+2)) + (1 << (memLevel+9))
+ that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+ make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+ The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
+ /* Type declarations */
+
+#ifndef OF /* function prototypes */
+# ifdef STDC
+# define OF(args) args
+# else
+# define OF(args) ()
+# endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
+ /* MSC small or medium model */
+# define SMALL_MEDIUM
+# ifdef _MSC_VER
+# define FAR _far
+# else
+# define FAR far
+# endif
+#endif
+#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
+# ifndef __32BIT__
+# define SMALL_MEDIUM
+# define FAR _far
+# endif
+#endif
+
+/* Compile with -DZLIB_DLL for Windows DLL support */
+#if defined(ZLIB_DLL)
+# if defined(_WINDOWS) || defined(WINDOWS)
+# ifdef FAR
+# undef FAR
+# endif
+# include <windows.h>
+# define ZEXPORT WINAPI
+# ifdef WIN32
+# define ZEXPORTVA WINAPIV
+# else
+# define ZEXPORTVA FAR _cdecl _export
+# endif
+# endif
+# if defined (__BORLANDC__)
+# if (__BORLANDC__ >= 0x0500) && defined (WIN32)
+# include <windows.h>
+# define ZEXPORT __declspec(dllexport) WINAPI
+# define ZEXPORTRVA __declspec(dllexport) WINAPIV
+# else
+# if defined (_Windows) && defined (__DLL__)
+# define ZEXPORT _export
+# define ZEXPORTVA _export
+# endif
+# endif
+# endif
+#endif
+
+#if defined (__BEOS__)
+# if defined (ZLIB_DLL)
+# define ZEXTERN extern __declspec(dllexport)
+# else
+# define ZEXTERN extern __declspec(dllimport)
+# endif
+#endif
+
+#ifndef ZEXPORT
+# define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+# define ZEXPORTVA
+#endif
+#ifndef ZEXTERN
+# define ZEXTERN extern
+#endif
+
+#ifndef FAR
+# define FAR
+#endif
+
+#if !defined(__MACTYPES__)
+typedef unsigned char Byte; /* 8 bits */
+#endif
+typedef unsigned int uInt; /* 16 bits or more */
+typedef unsigned long uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+ /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+# define Bytef Byte FAR
+#else
+ typedef Byte FAR Bytef;
+#endif
+typedef char FAR charf;
+typedef int FAR intf;
+typedef uInt FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+ typedef void const *voidpc;
+ typedef void FAR *voidpf;
+ typedef void *voidp;
+#else
+ typedef Byte const *voidpc;
+ typedef Byte FAR *voidpf;
+ typedef Byte *voidp;
+#endif
+
+#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
+# include <sys/types.h> /* for off_t */
+# include <unistd.h> /* for SEEK_* and off_t */
+# define z_off_t off_t
+#endif
+#ifndef SEEK_SET
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
+#endif
+#ifndef z_off_t
+# define z_off_t long
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+# pragma map(deflateInit_,"DEIN")
+# pragma map(deflateInit2_,"DEIN2")
+# pragma map(deflateEnd,"DEEND")
+# pragma map(deflateBound,"DEBND")
+# pragma map(inflateInit_,"ININ")
+# pragma map(inflateInit2_,"ININ2")
+# pragma map(inflateEnd,"INEND")
+# pragma map(inflateSync,"INSY")
+# pragma map(inflateSetDictionary,"INSEDI")
+# pragma map(compressBound,"CMBND")
+# pragma map(inflate_table,"INTABL")
+# pragma map(inflate_fast,"INFA")
+# pragma map(inflate_copyright,"INCOPY")
+#endif
+
+#endif /* _ZCONF_H */
+++ /dev/null
-.TH ZLIB 3 "11 March 2002"
-.SH NAME
-zlib \- compression/decompression library
-.SH SYNOPSIS
-[see
-.I zlib.h
-for full description]
-.SH DESCRIPTION
-The
-.I zlib
-library is a general purpose data compression library.
-The code is thread safe.
-It provides in-memory compression and decompression functions,
-including integrity checks of the uncompressed data.
-This version of the library supports only one compression method (deflation)
-but other algorithms will be added later and will have the same stream interface.
-.LP
-Compression can be done in a single step if the buffers are large enough
-(for example if an input file is mmap'ed),
-or can be done by repeated calls of the compression function.
-In the latter case,
-the application must provide more input and/or consume the output
-(providing more output space) before each call.
-.LP
-The library also supports reading and writing files in
-.I gzip
-(.gz) format
-with an interface similar to that of stdio.
-.LP
-The library does not install any signal handler. The decoder checks
-the consistency of the compressed data, so the library should never
-crash even in case of corrupted input.
-.LP
-All functions of the compression library are documented in the file
-.IR zlib.h.
-The distribution source includes examples of use of the library
-the files
-.I example.c
-and
-.IR minigzip.c .
-.LP
-A Java implementation of
-.IR zlib
-is available in the Java Development Kit 1.1
-.IP
-http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
-.LP
-A Perl interface to
-.IR zlib ,
-written by Paul Marquess (pmarquess@bfsec.bt.co.uk)
-is available at CPAN (Comprehensive Perl Archive Network) sites,
-such as:
-.IP
-ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
-.LP
-A Python interface to
-.IR zlib
-written by A.M. Kuchling <amk@magnet.com>
-is available from the Python Software Association sites, such as:
-.IP
-ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
-.SH "SEE ALSO"
-Questions about zlib should be sent to:
-.IP
-zlib@quest.jpl.nasa.gov
-or, if this fails, to the author addresses given below.
-The zlib home page is:
-.IP
-http://www.cdrom.com/pub/infozip/zlib/
-.LP
-The data format used by the zlib library is described by RFC
-(Request for Comments) 1950 to 1952 in the files:
-.IP
-ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
-.br
-rfc1951.txt (deflate format)
-.br
-rfc1952.txt (gzip format)
-.LP
-These documents are also available in other formats from:
-.IP
-ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
-.SH AUTHORS
-Version 1.1.4
-Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org)
-and Mark Adler (madler@alumni.caltech.edu).
-.LP
-This software is provided "as-is,"
-without any express or implied warranty.
-In no event will the authors be held liable for any damages
-arising from the use of this software.
-See the distribution directory with respect to requirements
-governing redistribution.
-The deflate format used by
-.I zlib
-was defined by Phil Katz.
-The deflate and
-.I zlib
-specifications were written by L. Peter Deutsch.
-Thanks to all the people who reported problems and suggested various
-improvements in
-.IR zlib ;
-who are too numerous to cite here.
-.LP
-UNIX manual page by R. P. C. Rodgers,
-U.S. National Library of Medicine (rodgers@nlm.nih.gov).
-.\" end of man page
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.1.4, March 11th, 2002
+ version 1.2.0, March 9th, 2003
- Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
+ Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
+ Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
*/
extern "C" {
#endif
-#define ZLIB_VERSION "1.1.4"
+#define ZLIB_VERSION "1.2.0"
/*
The 'zlib' compression library provides in-memory compression and
application must provide more input and/or consume the output
(providing more output space) before each call.
+ The compressed data format used by the in-memory functions is the zlib
+ format, which is a zlib wrapper documented in RFC 1950, wrapped around a
+ deflate stream, which is itself documented in RFC 1951.
+
The library also supports reading and writing files in gzip (.gz) format
- with an interface similar to that of stdio.
+ with an interface similar to that of stdio using the functions that start
+ with "gz". The gzip format is different from the zlib format. gzip is a
+ gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
+
+ The zlib format was designed to be compact and fast for use in memory
+ and on communications channels. The gzip format was designed for single-
+ file compression on file systems, has a larger header than zlib to maintain
+ directory information, and uses a different, slower check method than zlib.
+
+ This library does not provide any functions to write gzip files in memory.
+ However such functions could be easily written using zlib's deflate function,
+ the documentation in the gzip RFC, and the examples in gzio.c.
The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never
If deflate returns with avail_out == 0, this function must be called again
with the same value of the flush parameter and more output space (updated
avail_out), until the flush is complete (deflate returns with non-zero
- avail_out).
+ avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
+ avail_out is greater than six to avoid repeated flush markers due to
+ avail_out == 0 on return.
If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there
Z_FINISH can be used immediately after deflateInit if all the compression
is to be done in a single step. In this case, avail_out must be at least
- 0.1% larger than avail_in plus 12 bytes. If deflate does not return
+ the value returned by deflateBound (see below). If deflate does not return
Z_STREAM_END, then it must be called again as described above.
deflate() sets strm->adler to the adler32 checksum of all input read
consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
- (for example avail_in or avail_out was zero).
+ (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
+ fatal, and deflate() can be called again with more input and more output
+ space to continue compressing.
*/
must be called again after making room in the output buffer because there
might be more output pending.
- If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
- output as possible to the output buffer. The flushing behavior of inflate is
- not specified for values of the flush parameter other than Z_SYNC_FLUSH
- and Z_FINISH, but the current implementation actually flushes as much output
- as possible anyway.
+ The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, or
+ Z_FINISH. Z_SYNC_FLUSH requests that inflate() flush as much output as
+ possible to the output buffer.
inflate() should normally be called until it returns Z_STREAM_END or an
error. However if all decompression is to be performed in a single step
uncompressed data. (The size of the uncompressed data may have been saved
by the compressor for this purpose.) The next operation on this stream must
be inflateEnd to deallocate the decompression state. The use of Z_FINISH
- is never required, but can be used to inform inflate that a faster routine
+ is never required, but can be used to inform inflate that a faster approach
may be used for the single inflate() call.
- If a preset dictionary is needed at this point (see inflateSetDictionary
- below), inflate sets strm-adler to the adler32 checksum of the
- dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise
- it sets strm->adler to the adler32 checksum of all output produced
- so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or
- an error code as described below. At the end of the stream, inflate()
- checks that its computed adler32 checksum is equal to that saved by the
- compressor and returns Z_STREAM_END only if the checksum is correct.
+ In this implementation, inflate() always flushes as much output as
+ possible to the output buffer, and always uses the faster approach on the
+ first call. So the only effect of the flush parameter in this implementation
+ is on the return value of inflate(), as noted below.
+
+ If a preset dictionary is needed after this call (see inflateSetDictionary
+ below), inflate sets strm-adler to the adler32 checksum of the dictionary
+ chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
+ strm->adler to the adler32 checksum of all output produced so far (that is,
+ total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
+ below. At the end of the stream, inflate() checks that its computed adler32
+ checksum is equal to that saved by the compressor and returns Z_STREAM_END
+ only if the checksum is correct.
+
+ inflate() will decompress and check either zlib-wrapped or gzip-wrapped
+ deflate data. The header type is detected automatically. Any information
+ contained in the gzip header is not retained, so applications that need that
+ information should instead use raw inflate, see inflateInit2() below, or
+ inflateBack() and perform their own processing of the gzip header and
+ trailer.
inflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_END if the end of the compressed data has
been reached and all uncompressed output has been produced, Z_NEED_DICT if a
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
- corrupted (input stream not conforming to the zlib format or incorrect
- adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
- (for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
- enough memory, Z_BUF_ERROR if no progress is possible or if there was not
- enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
- case, the application may then call inflateSync to look for a good
- compression block.
+ corrupted (input stream not conforming to the zlib format or incorrect check
+ value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
+ if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
+ Z_BUF_ERROR if no progress is possible or if there was not enough room in the
+ output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+ inflate() can be called again with more input and more output space to
+ continue decompressing. If Z_DATA_ERROR is returned, the application may then
+ call inflateSync() to look for a good compression block if a partial recovery
+ of the data is desired.
*/
compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead.
+ windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
+ determines the window size. deflate() will then generate raw deflate data
+ with no zlib header or trailer, and will not compute an adler32 check value.
+
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but
is slow and reduces compression ratio; memLevel=9 uses maximum memory
deflate or deflate2. Thus the strings most likely to be useful should be
put at the end of the dictionary, not at the front.
- Upon return of this function, strm->adler is set to the Adler32 value
+ Upon return of this function, strm->adler is set to the adler32 value
of the dictionary; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The Adler32 value
+ which dictionary has been used by the compressor. (The adler32 value
applies to the whole dictionary even if only a subset of the dictionary is
- actually used by the compressor.)
+ actually used by the compressor.) If a raw deflate was requested, then the
+ adler32 value is not computed and strm->adler is not set.
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
*/
ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
- int level,
- int strategy));
+ int level,
+ int strategy));
/*
Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be
if strm->avail_out was zero.
*/
+ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
+ uLong sourceLen));
+/*
+ deflateBound() returns an upper bound on the compressed size after
+ deflation of sourceLen bytes. It must be called after deflateInit()
+ or deflateInit2(). This would be used to allocate an output buffer
+ for deflation in a single pass, and so would be called before deflate().
+*/
+
/*
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
input, inflate() will return with the error code Z_DATA_ERROR instead of
trying to allocate a larger window.
- inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
+ determines the window size. inflate() will then process raw deflate data,
+ not looking for a zlib or gzip header, not generating a check value, and not
+ looking for any check values for comparison at the end of the stream. This
+ is for use with other formats that use the deflate compressed data format
+ such as zip. Those formats provide their own check values. If a custom
+ format is developed using the raw deflate format for compressed data, it is
+ recommended that a check value such as an adler32 or a crc32 be applied to
+ the uncompressed data as is done in the zlib, gzip, and zip formats. For
+ most applications, the zlib format should be used as is.
+
+ inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
memLevel). msg is set to null if there is no error message. inflateInit2
does not perform any decompression apart from reading the zlib header if
Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate
if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
- can be determined from the Adler32 value returned by this call of
+ can be determined from the adler32 value returned by this call of
inflate. The compressor and decompressor must use exactly the same
dictionary (see deflateSetDictionary).
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
- expected one (incorrect Adler32 value). inflateSetDictionary does not
+ expected one (incorrect adler32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of
inflate().
*/
until success or end of the input data.
*/
+ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
+ z_streamp source));
+/*
+ Sets the destination stream as a complete copy of the source stream.
+
+ This function can be useful when randomly accessing a large stream. The
+ first pass through the stream can periodically record the inflate state,
+ allowing restarting inflate at those points when randomly accessing the
+ stream.
+
+ inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+ (such as zalloc being NULL). msg is left unchanged in both source and
+ destination.
+*/
+
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
stream state was inconsistent (such as zalloc or state being NULL).
*/
+/*
+ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
+ unsigned char FAR *window));
+
+ Initialize the internal stream state for decompression using inflateBack()
+ calls. The fields zalloc, zfree and opaque in strm must be initialized
+ before the call. If zalloc and zfree are Z_NULL, then the default library-
+ derived memory allocation routines are used. windowBits is the base two
+ logarithm of the window size, in the range 8..15. window is a caller
+ supplied buffer of that size. Except for special applications where it is
+ assured that deflate was used with small window sizes, windowBits must be 15
+ and a 32K byte window must be supplied to be able to decompress general
+ deflate streams.
+
+ See inflateBack() for the usage of these routines.
+
+ inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
+ the paramaters are invalid, Z_MEM_ERROR if the internal state could not
+ be allocated, or Z_VERSION_ERROR if the version of the library does not
+ match the version of the header file.
+*/
+
+typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
+typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
+
+ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
+ in_func in, void FAR *in_desc,
+ out_func out, void FAR *out_desc));
+/*
+ inflateBack() does a raw inflate with a single call using a call-back
+ interface for input and output. This is more efficient than inflate() for
+ file i/o applications in that it avoids copying between the output and the
+ sliding window by simply making the window itself the output buffer. This
+ function trusts the application to not change the output buffer passed by
+ the output function, at least until inflateBack() returns.
+
+ inflateBackInit() must be called first to allocate the internal state
+ and to initialize the state with the user-provided window buffer.
+ inflateBack() may then be used multiple times to inflate a complete, raw
+ deflate stream with each call. inflateBackEnd() is then called to free
+ the allocated state.
+
+ A raw deflate stream is one with no zlib or gzip header or trailer.
+ This routine would normally be used in a utility that reads zip or gzip
+ files and writes out uncompressed files. The utility would decode the
+ header and process the trailer on its own, hence this routine expects
+ only the raw deflate stream to decompress. This is different from the
+ normal behavior of inflate(), which expects either a zlib or gzip header and
+ trailer around the deflate stream.
+
+ inflateBack() uses two subroutines supplied by the caller that are then
+ called by inflateBack() for input and output. inflateBack() calls those
+ routines until it reads a complete deflate stream and writes out all of the
+ uncompressed data, or until it encounters an error. The function's
+ parameters and return types are defined above in the in_func and out_func
+ typedefs. inflateBack() will call in(in_desc, &buf) which should return the
+ number of bytes of provided input, and a pointer to that input in buf. If
+ there is no input available, in() must return zero--buf is ignored in that
+ case--and inflateBack() will return a buffer error. inflateBack() will call
+ out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
+ should return zero on success, or non-zero on failure. If out() returns
+ non-zero, inflateBack() will return with an error. Neither in() nor out()
+ are permitted to change the contents of the window provided to
+ inflateBackInit(), which is also the buffer that out() uses to write from.
+ The length written by out() will be at most the window size. Any non-zero
+ amount of input may be provided by in().
+
+ For convenience, inflateBack() can be provided input on the first call by
+ setting strm->next_in and strm->avail_in. If that input is exhausted, then
+ in() will be called. Therefore strm->next_in must be initialized before
+ calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
+ immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
+ must also be initialized, and then if strm->avail_in is not zero, input will
+ initially be taken from strm->next_in[0 .. strm->avail_in - 1].
+
+ The in_desc and out_desc parameters of inflateBack() is passed as the
+ first parameter of in() and out() respectively when they are called. These
+ descriptors can be optinally used to pass any information that the caller-
+ supplied in() and out() functions need to do their job.
+
+ On return, inflateBack() will set strm->next_in and strm->avail_in to
+ pass back any unused input that was provided by the last in() call. The
+ return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
+ if in() or out() returned an error, Z_DATA_ERROR if there was a format
+ error in the deflate stream (in which case strm->msg is set to indicate the
+ nature of the error), or Z_STREAM_ERROR if the stream was not properly
+ initialized. In the case of Z_BUF_ERROR, an input or output error can be
+ distinguished using strm->next_in which will be Z_NULL only if in() returned
+ an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
+ out() returning non-zero. (in() will always be called before out(), so
+ strm->next_in is assured to be defined if out() returns non-zero.) Note
+ that inflateBack() cannot return Z_OK.
+*/
+
+ZEXTERN int ZEXPORT inflateBackEnd(z_stream FAR *strm);
+/*
+ All memory allocated by inflateBackInit() is freed.
+
+ inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
+ state was inconsistent.
+*/
+
/* utility functions */
/*
Compresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be at least 0.1% larger than
- sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
+ size of the destination buffer, which must be at least the value returned
+ by compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer.
This function can be used to compress a whole file at once if the
input file is mmap'ed.
Compresses the source buffer into the destination buffer. The level
parameter has the same meaning as in deflateInit. sourceLen is the byte
length of the source buffer. Upon entry, destLen is the total size of the
- destination buffer, which must be at least 0.1% larger than sourceLen plus
- 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+ destination buffer, which must be at least the value returned by
+ compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressed buffer.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
Z_STREAM_ERROR if the level parameter is invalid.
*/
+ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
+/*
+ compressBound() returns an upper bound on the compressed size after
+ compress() or compress2() on sourceLen bytes. It would be used before
+ a compress() or compress2() call to allocate the destination buffer.
+*/
+
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen));
/*
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
- buffer, or Z_DATA_ERROR if the input data was corrupted.
+ buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
*/
end of file, -1 for error). */
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
- const voidp buf, unsigned len));
+ voidpc buf, unsigned len));
/*
Writes the given number of uncompressed bytes into the compressed file.
gzwrite returns the number of uncompressed bytes actually written
/*
Converts, formats, and writes the args to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of
- uncompressed bytes actually written (0 in case of error).
+ uncompressed bytes actually written (0 in case of error). The number of
+ uncompressed bytes written is limited to 4095. The caller should assure
+ that this limit is not exceeded, since otherwise a buffer overflow may
+ result.
*/
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
*/
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
- z_off_t offset, int whence));
+ z_off_t offset, int whence));
/*
Sets the starting position for the next gzread or gzwrite on the
given compressed file. The offset represents a number of bytes in the
int stream_size));
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
+ unsigned char FAR *window,
+ const char *version,
+ int stream_size));
#define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
#define inflateInit(strm) \
(strategy), ZLIB_VERSION, sizeof(z_stream))
#define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+#define inflateBackInit(strm, windowBits, window) \
+ inflateBackInit_((strm), (windowBits), (window), \
+ ZLIB_VERSION, sizeof(z_stream))
#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
+++ /dev/null
-<html>
-<head>
- <title>
- zlib general purpose compression library version 1.1.4
- </title>
-</head>
-<body bgcolor="White" text="Black" vlink="Red" alink="Navy" link="Red">
-<!-- background="zlibbg.gif" -->
-
-<h1> zlib 1.1.4 Manual </h1>
-<hr>
-<a name="Contents"><h2>Contents</h2>
-<ol type="I">
-<li> <a href="#Prologue">Prologue</a>
-<li> <a href="#Introduction">Introduction</a>
-<li> <a href="#Utility functions">Utility functions</a>
-<li> <a href="#Basic functions">Basic functions</a>
-<li> <a href="#Advanced functions">Advanced functions</a>
-<li> <a href="#Constants">Constants</a>
-<li> <a href="#struct z_stream_s">struct z_stream_s</a>
-<li> <a href="#Checksum functions">Checksum functions</a>
-<li> <a href="#Misc">Misc</a>
-</ol>
-<hr>
-<a name="Prologue"><h2> Prologue </h2>
- 'zlib' general purpose compression library version 1.1.4, March 11th, 2002
- <p>
- Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
- <p>
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
- <p>
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
- <ol>
- <li> The origin of this software must not be misrepresented ; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- <li> Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- <li> This notice may not be removed or altered from any source distribution.
- </ol>
-
- <dl>
- <dt>Jean-loup Gailly
- <dd><a href="mailto:jloup@gzip.org">jloup@gzip.org</a>
- <dt>Mark Adler
- <dd><a href="mailto:madler@alumni.caltech.edu">madler@alumni.caltech.edu</a>
- </dl>
-
- The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files
- <a href="ftp://ds.internic.net/rfc/rfc1950.txt">
- ftp://ds.internic.net/rfc/rfc1950.txt </a>
- (zlib format),
- <a href="ftp://ds.internic.net/rfc/rfc1951.txt">
- rfc1951.txt </a>
- (<a href="#deflate">deflate</a> format) and
- <a href="ftp://ds.internic.net/rfc/rfc1952.txt">
- rfc1952.txt </a>
- (gzip format).
- <p>
- This manual is converted from zlib.h by
- <a href="mailto:piaip@csie.ntu.edu.tw"> piaip </a>
- <p>
- Visit <a href="http://ftp.cdrom.com/pub/infozip/zlib/">
- http://ftp.cdrom.com/pub/infozip/zlib/</a>
- for the official zlib web page.
- <p>
-
-<hr>
-<a name="Introduction"><h2> Introduction </h2>
- The 'zlib' compression library provides in-memory compression and
- decompression functions, including integrity checks of the uncompressed
- data. This version of the library supports only one compression method
- (deflation) but other algorithms will be added later and will have the same
- stream interface.
- <p>
-
- Compression can be done in a single step if the buffers are large
- enough (for example if an input file is mmap'ed), or can be done by
- repeated calls of the compression function. In the latter case, the
- application must provide more input and/or consume the output
- (providing more output space) before each call.
- <p>
-
- The library also supports reading and writing files in gzip (.gz) format
- with an interface similar to that of stdio.
- <p>
-
- The library does not install any signal handler. The decoder checks
- the consistency of the compressed data, so the library should never
- crash even in case of corrupted input.
- <p>
-
-<hr>
-<a name="Utility functions"><h2> Utility functions </h2>
- The following utility functions are implemented on top of the
- <a href="#Basic functions">basic stream-oriented functions</a>.
- To simplify the interface, some
- default options are assumed (compression level and memory usage,
- standard memory allocation functions). The source code of these
- utility functions can easily be modified if you need special options.
-<h3> Function list </h3>
-<ul>
-<li> int <a href="#compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
-<li> int <a href="#compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
-<li> int <a href="#uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
-<li> typedef voidp gzFile;
-<li> gzFile <a href="#gzopen">gzopen</a> (const char *path, const char *mode);
-<li> gzFile <a href="#gzdopen">gzdopen</a> (int fd, const char *mode);
-<li> int <a href="#gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);
-<li> int <a href="#gzread">gzread</a> (gzFile file, voidp buf, unsigned len);
-<li> int <a href="#gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);
-<li> int VA <a href="#gzprintf">gzprintf</a> (gzFile file, const char *format, ...);
-<li> int <a href="#gzputs">gzputs</a> (gzFile file, const char *s);
-<li> char * <a href="#gzgets">gzgets</a> (gzFile file, char *buf, int len);
-<li> int <a href="#gzputc">gzputc</a> (gzFile file, int c);
-<li> int <a href="#gzgetc">gzgetc</a> (gzFile file);
-<li> int <a href="#gzflush">gzflush</a> (gzFile file, int flush);
-<li> z_off_t <a href="#gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);
-<li> z_off_t <a href="#gztell">gztell</a> (gzFile file);
-<li> int <a href="#gzrewind">gzrewind</a> (gzFile file);
-<li> int <a href="#gzeof">gzeof</a> (gzFile file);
-<li> int <a href="#gzclose">gzclose</a> (gzFile file);
-<li> const char * <a href="#gzerror">gzerror</a> (gzFile file, int *errnum);
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> int <a name="compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
-<dd>
- Compresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be at least 0.1% larger than
- sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
- compressed buffer.<p>
- This function can be used to <a href="#compress">compress</a> a whole file at once if the
- input file is mmap'ed.<p>
- <a href="#compress">compress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
- buffer.<p>
-
-<font color="Blue"><dt> int <a name="compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);</font>
-<dd>
- Compresses the source buffer into the destination buffer. The level
- parameter has the same meaning as in <a href="#deflateInit">deflateInit</a>. sourceLen is the byte
- length of the source buffer. Upon entry, destLen is the total size of the
- destination buffer, which must be at least 0.1% larger than sourceLen plus
- 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
- <p>
-
- <a href="#compress2">compress2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output buffer,
- <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the level parameter is invalid.
- <p>
-
-<font color="Blue"><dt> int <a name="uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
-<dd>
- Decompresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the compressed buffer. <p>
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
- <p>
-
- <a href="#uncompress">uncompress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
- buffer, or <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was corrupted.
- <p>
-
-<dt> typedef voidp gzFile;
-<dd> <p>
-
-<font color="Blue"><dt> gzFile <a name="gzopen">gzopen</a> (const char *path, const char *mode);</font>
-<dd>
- Opens a gzip (.gz) file for reading or writing. The mode parameter
- is as in fopen ("rb" or "wb") but can also include a compression level
- ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
- Huffman only compression as in "wb1h". (See the description
- of <a href="#deflateInit2">deflateInit2</a> for more information about the strategy parameter.)
- <p>
-
- <a href="#gzopen">gzopen</a> can be used to read a file which is not in gzip format ; in this
- case <a href="#gzread">gzread</a> will directly read from the file without decompression.
- <p>
-
- <a href="#gzopen">gzopen</a> returns NULL if the file could not be opened or if there was
- insufficient memory to allocate the (de)compression <a href="#state">state</a> ; errno
- can be checked to distinguish the two cases (if errno is zero, the
- zlib error is <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a>).
- <p>
-
-<font color="Blue"><dt> gzFile <a name="gzdopen">gzdopen</a> (int fd, const char *mode);</font>
-<dd>
- <a href="#gzdopen">gzdopen</a>() associates a gzFile with the file descriptor fd. File
- descriptors are obtained from calls like open, dup, creat, pipe or
- fileno (in the file has been previously opened with fopen).
- The mode parameter is as in <a href="#gzopen">gzopen</a>.
- <p>
- The next call of <a href="#gzclose">gzclose</a> on the returned gzFile will also close the
- file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
- descriptor fd. If you want to keep fd open, use <a href="#gzdopen">gzdopen</a>(dup(fd), mode).
- <p>
- <a href="#gzdopen">gzdopen</a> returns NULL if there was insufficient memory to allocate
- the (de)compression <a href="#state">state</a>.
- <p>
-
-<font color="Blue"><dt> int <a name="gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);</font>
-<dd>
- Dynamically update the compression level or strategy. See the description
- of <a href="#deflateInit2">deflateInit2</a> for the meaning of these parameters.
- <p>
- <a href="#gzsetparams">gzsetparams</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the file was not
- opened for writing.
- <p>
-
-<font color="Blue"><dt> int <a name="gzread">gzread</a> (gzFile file, voidp buf, unsigned len);</font>
-<dd>
- Reads the given number of uncompressed bytes from the compressed file.
- If the input file was not in gzip format, <a href="#gzread">gzread</a> copies the given number
- of bytes into the buffer.
- <p>
- <a href="#gzread">gzread</a> returns the number of uncompressed bytes actually read (0 for
- end of file, -1 for error).
- <p>
-
-<font color="Blue"><dt> int <a name="gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);</font>
-<dd>
- Writes the given number of uncompressed bytes into the compressed file.
- <a href="#gzwrite">gzwrite</a> returns the number of uncompressed bytes actually written
- (0 in case of error).
- <p>
-
-<font color="Blue"><dt> int VA <a name="gzprintf">gzprintf</a> (gzFile file, const char *format, ...);</font>
-<dd>
- Converts, formats, and writes the args to the compressed file under
- control of the format string, as in fprintf. <a href="#gzprintf">gzprintf</a> returns the number of
- uncompressed bytes actually written (0 in case of error).
- <p>
-
-<font color="Blue"><dt> int <a name="gzputs">gzputs</a> (gzFile file, const char *s);</font>
-<dd>
- Writes the given null-terminated string to the compressed file, excluding
- the terminating null character.
- <p>
- <a href="#gzputs">gzputs</a> returns the number of characters written, or -1 in case of error.
- <p>
-
-<font color="Blue"><dt> char * <a name="gzgets">gzgets</a> (gzFile file, char *buf, int len);</font>
-<dd>
- Reads bytes from the compressed file until len-1 characters are read, or
- a newline character is read and transferred to buf, or an end-of-file
- condition is encountered. The string is then terminated with a null
- character.
- <p>
- <a href="#gzgets">gzgets</a> returns buf, or <a href="#Z_NULL">Z_NULL</a> in case of error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzputc">gzputc</a> (gzFile file, int c);</font>
-<dd>
- Writes c, converted to an unsigned char, into the compressed file.
- <a href="#gzputc">gzputc</a> returns the value that was written, or -1 in case of error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzgetc">gzgetc</a> (gzFile file);</font>
-<dd>
- Reads one byte from the compressed file. <a href="#gzgetc">gzgetc</a> returns this byte
- or -1 in case of end of file or error.
- <p>
-
-<font color="Blue"><dt> int <a name="gzflush">gzflush</a> (gzFile file, int flush);</font>
-<dd>
- Flushes all pending output into the compressed file. The parameter
- flush is as in the <a href="#deflate">deflate</a>() function. The return value is the zlib
- error number (see function <a href="#gzerror">gzerror</a> below). <a href="#gzflush">gzflush</a> returns <a href="#Z_OK">Z_OK</a> if
- the flush parameter is <a href="#Z_FINISH">Z_FINISH</a> and all output could be flushed.
- <p>
- <a href="#gzflush">gzflush</a> should be called only when strictly necessary because it can
- degrade compression.
- <p>
-
-<font color="Blue"><dt> z_off_t <a name="gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);</font>
-<dd>
- Sets the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
- given compressed file. The offset represents a number of bytes in the
- uncompressed data stream. The whence parameter is defined as in lseek(2);
- the value SEEK_END is not supported.
- <p>
- If the file is opened for reading, this function is emulated but can be
- extremely slow. If the file is opened for writing, only forward seeks are
- supported ; <a href="#gzseek">gzseek</a> then compresses a sequence of zeroes up to the new
- starting position.
- <p>
- <a href="#gzseek">gzseek</a> returns the resulting offset location as measured in bytes from
- the beginning of the uncompressed stream, or -1 in case of error, in
- particular if the file is opened for writing and the new starting position
- would be before the current position.
- <p>
-
-<font color="Blue"><dt> int <a name="gzrewind">gzrewind</a> (gzFile file);</font>
-<dd>
- Rewinds the given file. This function is supported only for reading.
- <p>
- <a href="#gzrewind">gzrewind</a>(file) is equivalent to (int)<a href="#gzseek">gzseek</a>(file, 0L, SEEK_SET)
- <p>
-
-<font color="Blue"><dt> z_off_t <a name="gztell">gztell</a> (gzFile file);</font>
-<dd>
- Returns the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
- given compressed file. This position represents a number of bytes in the
- uncompressed data stream.
- <p>
-
- <a href="#gztell">gztell</a>(file) is equivalent to <a href="#gzseek">gzseek</a>(file, 0L, SEEK_CUR)
- <p>
-
-<font color="Blue"><dt> int <a name="gzeof">gzeof</a> (gzFile file);</font>
-<dd>
- Returns 1 when EOF has previously been detected reading the given
- input stream, otherwise zero.
- <p>
-
-<font color="Blue"><dt> int <a name="gzclose">gzclose</a> (gzFile file);</font>
-<dd>
- Flushes all pending output if necessary, closes the compressed file
- and deallocates all the (de)compression <a href="#state">state</a>. The return value is the zlib
- error number (see function <a href="#gzerror">gzerror</a> below).
- <p>
-
-<font color="Blue"><dt> const char * <a name="gzerror">gzerror</a> (gzFile file, int *errnum);</font>
-<dd>
- Returns the error message for the last error which occurred on the
- given compressed file. errnum is set to zlib error number. If an
- error occurred in the file system and not in the compression library,
- errnum is set to <a href="#Z_ERRNO">Z_ERRNO</a> and the application may consult errno
- to get the exact error code.
- <p>
-</dl>
-<hr>
-<a name="Basic functions"><h2> Basic functions </h2>
-<h3> Function list </h3>
-<ul>
-<li> const char * <a href="#zlibVersion">zlibVersion</a> (void);
-<li> int <a href="#deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);
-<li> int <a href="#deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
-<li> int <a href="#deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
-<li> int <a href="#inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
-</ul>
-
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> const char * <a name="zlibVersion">zlibVersion</a> (void);</font>
-<dd> The application can compare <a href="#zlibVersion">zlibVersion</a> and ZLIB_VERSION for consistency.
- If the first character differs, the library code actually used is
- not compatible with the zlib.h header file used by the application.
- This check is automatically made by <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a>.
- <p>
-
-<font color="Blue"><dt> int <a name="deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);</font>
-<dd>
- Initializes the internal stream <a href="#state">state</a> for compression. The fields
- <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by the caller.
- If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#deflateInit">deflateInit</a> updates them to
- use default allocation functions.
- <p>
-
- The compression level must be <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>, or between 0 and 9:
- 1 gives best speed, 9 gives best compression, 0 gives no compression at
- all (the input data is simply copied a block at a time).
- <p>
-
- <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> requests a default compromise between speed and
- compression (currently equivalent to level 6).
- <p>
-
- <a href="#deflateInit">deflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if level is not a valid compression level,
- <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version (<a href="#zlib_version">zlib_version</a>) is incompatible
- with the version assumed by the caller (ZLIB_VERSION).
- <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit">deflateInit</a> does not
- perform any compression: this will be done by <a href="#deflate">deflate</a>().
- <p>
-
-<font color="Blue"><dt> int <a name="deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
-<dd>
- <a href="#deflate">deflate</a> compresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce some
- output latency (reading input without producing any output) except when
- forced to flush.<p>
-
- The detailed semantics are as follows. <a href="#deflate">deflate</a> performs one or both of the
- following actions:
-
- <ul>
- <li> Compress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> are updated and
- processing will resume at this point for the next call of <a href="#deflate">deflate</a>().
-
- <li>
- Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a>
- accordingly. This action is forced if the parameter flush is non zero.
- Forcing flush frequently degrades the compression ratio, so this parameter
- should be set only when necessary (in interactive applications).
- Some output may be provided even if flush is not set.
- </ul> <p>
-
- Before the call of <a href="#deflate">deflate</a>(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> accordingly ; <a href="#avail_out">avail_out</a>
- should never be zero before the call. The application can consume the
- compressed output when it wants, for example when the output buffer is full
- (<a href="#avail_out">avail_out</a> == 0), or after each call of <a href="#deflate">deflate</a>(). If <a href="#deflate">deflate</a> returns <a href="#Z_OK">Z_OK</a>
- and with zero <a href="#avail_out">avail_out</a>, it must be called again after making room in the
- output buffer because there might be more output pending.
- <p>
-
- If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, all pending output is
- flushed to the output buffer and the output is aligned on a byte boundary, so
- that the decompressor can get all input data available so far. (In particular
- <a href="#avail_in">avail_in</a> is zero after the call if enough output space has been provided
- before the call.) Flushing may degrade compression for some compression
- algorithms and so it should be used only when necessary.
- <p>
-
- If flush is set to <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>, all output is flushed as with
- <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, and the compression <a href="#state">state</a> is reset so that decompression can
- restart from this point if previous compressed data has been damaged or if
- random access is desired. Using <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a> too often can seriously degrade
- the compression.
- <p>
-
- If <a href="#deflate">deflate</a> returns with <a href="#avail_out">avail_out</a> == 0, this function must be called again
- with the same value of the flush parameter and more output space (updated
- <a href="#avail_out">avail_out</a>), until the flush is complete (<a href="#deflate">deflate</a> returns with non-zero
- <a href="#avail_out">avail_out</a>).
- <p>
-
- If the parameter flush is set to <a href="#Z_FINISH">Z_FINISH</a>, pending input is processed,
- pending output is flushed and <a href="#deflate">deflate</a> returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> if there
- was enough output space ; if <a href="#deflate">deflate</a> returns with <a href="#Z_OK">Z_OK</a>, this function must be
- called again with <a href="#Z_FINISH">Z_FINISH</a> and more output space (updated <a href="#avail_out">avail_out</a>) but no
- more input data, until it returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> or an error. After
- <a href="#deflate">deflate</a> has returned <a href="#Z_STREAM_END">Z_STREAM_END</a>, the only possible operations on the
- stream are <a href="#deflateReset">deflateReset</a> or <a href="#deflateEnd">deflateEnd</a>.
- <p>
-
- <a href="#Z_FINISH">Z_FINISH</a> can be used immediately after <a href="#deflateInit">deflateInit</a> if all the compression
- is to be done in a single step. In this case, <a href="#avail_out">avail_out</a> must be at least
- 0.1% larger than <a href="#avail_in">avail_in</a> plus 12 bytes. If <a href="#deflate">deflate</a> does not return
- <a href="#Z_STREAM_END">Z_STREAM_END</a>, then it must be called again as described above.
- <p>
-
- <a href="#deflate">deflate</a>() sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all input read
- so far (that is, <a href="#total_in">total_in</a> bytes).
- <p>
-
- <a href="#deflate">deflate</a>() may update <a href="#data_type">data_type</a> if it can make a good guess about
- the input data type (<a href="#Z_ASCII">Z_ASCII</a> or <a href="#Z_BINARY">Z_BINARY</a>). In doubt, the data is considered
- binary. This field is only for information purposes and does not affect
- the compression algorithm in any manner.
- <p>
-
- <a href="#deflate">deflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input
- processed or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if all input has been
- consumed and all output has been produced (only when flush is set to
- <a href="#Z_FINISH">Z_FINISH</a>), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a> was inconsistent (for example
- if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible
- (for example <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> was zero).
- <p>
-
-<font color="Blue"><dt> int <a name="deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
- <p>
-
- <a href="#deflateEnd">deflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the
- stream <a href="#state">state</a> was inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the stream was freed
- prematurely (some input or output was discarded). In the error case,
- <a href="#msg">msg</a> may be set but then points to a static string (which must not be
- deallocated).
- <p>
-
-<font color="Blue"><dt> int <a name="inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- Initializes the internal stream <a href="#state">state</a> for decompression. The fields
- <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
- the caller. If <a href="#next_in">next_in</a> is not <a href="#Z_NULL">Z_NULL</a> and <a href="#avail_in">avail_in</a> is large enough (the exact
- value depends on the compression method), <a href="#inflateInit">inflateInit</a> determines the
- compression method from the zlib header and allocates all data structures
- accordingly ; otherwise the allocation will be deferred to the first call of
- <a href="#inflate">inflate</a>. If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#inflateInit">inflateInit</a> updates them to
- use default allocation functions.
- <p>
-
- <a href="#inflateInit">inflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version is incompatible with the
- version assumed by the caller. <a href="#msg">msg</a> is set to null if there is no error
- message. <a href="#inflateInit">inflateInit</a> does not perform any decompression apart from reading
- the zlib header if present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and
- <a href="#avail_in">avail_in</a> may be modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)
- <p>
-
-<font color="Blue"><dt> int <a name="inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
-<dd>
- <a href="#inflate">inflate</a> decompresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may some
- introduce some output latency (reading input without producing any output)
- except when forced to flush.
- <p>
-
- The detailed semantics are as follows. <a href="#inflate">inflate</a> performs one or both of the
- following actions:
-
- <ul>
- <li> Decompress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), <a href="#next_in">next_in</a> is updated and processing
- will resume at this point for the next call of <a href="#inflate">inflate</a>().
-
- <li> Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and
- <a href="#avail_out">avail_out</a> accordingly. <a href="#inflate">inflate</a>() provides as much output as possible,
- until there is no more input data or no more space in the output buffer
- (see below about the flush parameter).
- </ul> <p>
-
- Before the call of <a href="#inflate">inflate</a>(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating the next_* and avail_* values accordingly.
- The application can consume the uncompressed output when it wants, for
- example when the output buffer is full (<a href="#avail_out">avail_out</a> == 0), or after each
- call of <a href="#inflate">inflate</a>(). If <a href="#inflate">inflate</a> returns <a href="#Z_OK">Z_OK</a> and with zero <a href="#avail_out">avail_out</a>, it
- must be called again after making room in the output buffer because there
- might be more output pending.
- <p>
-
- If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, <a href="#inflate">inflate</a> flushes as much
- output as possible to the output buffer. The flushing behavior of <a href="#inflate">inflate</a> is
- not specified for values of the flush parameter other than <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>
- and <a href="#Z_FINISH">Z_FINISH</a>, but the current implementation actually flushes as much output
- as possible anyway.
- <p>
-
- <a href="#inflate">inflate</a>() should normally be called until it returns <a href="#Z_STREAM_END">Z_STREAM_END</a> or an
- error. However if all decompression is to be performed in a single step
- (a single call of <a href="#inflate">inflate</a>), the parameter flush should be set to
- <a href="#Z_FINISH">Z_FINISH</a>. In this case all pending input is processed and all pending
- output is flushed ; <a href="#avail_out">avail_out</a> must be large enough to hold all the
- uncompressed data. (The size of the uncompressed data may have been saved
- by the compressor for this purpose.) The next operation on this stream must
- be <a href="#inflateEnd">inflateEnd</a> to deallocate the decompression <a href="#state">state</a>. The use of <a href="#Z_FINISH">Z_FINISH</a>
- is never required, but can be used to inform <a href="#inflate">inflate</a> that a faster routine
- may be used for the single <a href="#inflate">inflate</a>() call.
- <p>
-
- If a preset dictionary is needed at this point (see <a href="#inflateSetDictionary">inflateSetDictionary</a>
- below), <a href="#inflate">inflate</a> sets strm-<a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of the
- dictionary chosen by the compressor and returns <a href="#Z_NEED_DICT">Z_NEED_DICT</a> ; otherwise
- it sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all output produced
- so far (that is, <a href="#total_out">total_out</a> bytes) and returns <a href="#Z_OK">Z_OK</a>, <a href="#Z_STREAM_END">Z_STREAM_END</a> or
- an error code as described below. At the end of the stream, <a href="#inflate">inflate</a>()
- checks that its computed <a href="#adler32">adler32</a> checksum is equal to that saved by the
- compressor and returns <a href="#Z_STREAM_END">Z_STREAM_END</a> only if the checksum is correct.
- <p>
-
- <a href="#inflate">inflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input processed
- or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if the end of the compressed data has
- been reached and all uncompressed output has been produced, <a href="#Z_NEED_DICT">Z_NEED_DICT</a> if a
- preset dictionary is needed at this point, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was
- corrupted (input stream not conforming to the zlib format or incorrect
- <a href="#adler32">adler32</a> checksum), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent
- (for example if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible or if there was not
- enough room in the output buffer when <a href="#Z_FINISH">Z_FINISH</a> is used. In the <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a>
- case, the application may then call <a href="#inflateSync">inflateSync</a> to look for a good
- compression block.
- <p>
-
-<font color="Blue"><dt> int <a name="inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
- <p>
-
- <a href="#inflateEnd">inflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a>
- was inconsistent. In the error case, <a href="#msg">msg</a> may be set but then points to a
- static string (which must not be deallocated).
-</dl>
-<hr>
-<a name="Advanced functions"><h2> Advanced functions </h2>
- The following functions are needed only in some special applications.
-<h3> Function list </h3>
-<ul>
-<li> int <a href="#deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm,
-<li> int <a href="#deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
-<li> int <a href="#deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);
-<li> int <a href="#deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);
-<li> int <a href="#inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);
-<li> int <a href="#inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
-<li> int <a href="#inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);
-<li> int <a href="#inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
-
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> int <a name="deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int method, int windowBits, int memLevel, int strategy);</font>
-
-<dd> This is another version of <a href="#deflateInit">deflateInit</a> with more compression options. The
- fields <a href="#next_in">next_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
- the caller.<p>
-
- The method parameter is the compression method. It must be <a href="#Z_DEFLATED">Z_DEFLATED</a> in
- this version of the library.<p>
-
- The windowBits parameter is the base two logarithm of the window size
- (the size of the history buffer). It should be in the range 8..15 for this
- version of the library. Larger values of this parameter result in better
- compression at the expense of memory usage. The default value is 15 if
- <a href="#deflateInit">deflateInit</a> is used instead.<p>
-
- The memLevel parameter specifies how much memory should be allocated
- for the internal compression <a href="#state">state</a>. memLevel=1 uses minimum memory but
- is slow and reduces compression ratio ; memLevel=9 uses maximum memory
- for optimal speed. The default value is 8. See zconf.h for total memory
- usage as a function of windowBits and memLevel.<p>
-
- The strategy parameter is used to tune the compression algorithm. Use the
- value <a href="#Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> for normal data, <a href="#Z_FILTERED">Z_FILTERED</a> for data produced by a
- filter (or predictor), or <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> to force Huffman encoding only (no
- string match). Filtered data consists mostly of small values with a
- somewhat random distribution. In this case, the compression algorithm is
- tuned to <a href="#compress">compress</a> them better. The effect of <a href="#Z_FILTERED">Z_FILTERED</a> is to force more
- Huffman coding and less string matching ; it is somewhat intermediate
- between Z_DEFAULT and <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>. The strategy parameter only affects
- the compression ratio but not the correctness of the compressed output even
- if it is not set appropriately.<p>
-
- <a href="#deflateInit2">deflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as an invalid
- method). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit2">deflateInit2</a> does
- not perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
-<dd>
- Initializes the compression dictionary from the given byte sequence
- without producing any compressed output. This function must be called
- immediately after <a href="#deflateInit">deflateInit</a>, <a href="#deflateInit2">deflateInit2</a> or <a href="#deflateReset">deflateReset</a>, before any
- call of <a href="#deflate">deflate</a>. The compressor and decompressor must use exactly the same
- dictionary (see <a href="#inflateSetDictionary">inflateSetDictionary</a>).<p>
-
- The dictionary should consist of strings (byte sequences) that are likely
- to be encountered later in the data to be compressed, with the most commonly
- used strings preferably put towards the end of the dictionary. Using a
- dictionary is most useful when the data to be compressed is short and can be
- predicted with good accuracy ; the data can then be compressed better than
- with the default empty dictionary.<p>
-
- Depending on the size of the compression data structures selected by
- <a href="#deflateInit">deflateInit</a> or <a href="#deflateInit2">deflateInit2</a>, a part of the dictionary may in effect be
- discarded, for example if the dictionary is larger than the window size in
- <a href="#deflate">deflate</a> or deflate2. Thus the strings most likely to be useful should be
- put at the end of the dictionary, not at the front.<p>
-
- Upon return of this function, strm-> <a href="#adler">adler</a> is set to the Adler32 value
- of the dictionary ; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The Adler32 value
- applies to the whole dictionary even if only a subset of the dictionary is
- actually used by the compressor.)<p>
-
- <a href="#deflateSetDictionary">deflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
- parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
- inconsistent (for example if <a href="#deflate">deflate</a> has already been called for this stream
- or if the compression method is bsort). <a href="#deflateSetDictionary">deflateSetDictionary</a> does not
- perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);</font>
-<dd>
- Sets the destination stream as a complete copy of the source stream.<p>
-
- This function can be useful when several compression strategies will be
- tried, for example when there are several ways of pre-processing the input
- data with a filter. The streams that will be discarded should then be freed
- by calling <a href="#deflateEnd">deflateEnd</a>. Note that <a href="#deflateCopy">deflateCopy</a> duplicates the internal
- compression <a href="#state">state</a> which can be quite large, so this strategy is slow and
- can consume lots of memory.<p>
-
- <a href="#deflateCopy">deflateCopy</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
- enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source stream <a href="#state">state</a> was inconsistent
- (such as <a href="#zalloc">zalloc</a> being NULL). <a href="#msg">msg</a> is left unchanged in both source and
- destination.<p>
-
-<font color="Blue"><dt> int <a name="deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd> This function is equivalent to <a href="#deflateEnd">deflateEnd</a> followed by <a href="#deflateInit">deflateInit</a>,
- but does not free and reallocate all the internal compression <a href="#state">state</a>.
- The stream will keep the same compression level and any other attributes
- that may have been set by <a href="#deflateInit2">deflateInit2</a>.<p>
-
- <a href="#deflateReset">deflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).<p>
-
-<font color="Blue"><dt> int <a name="deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);</font>
-<dd>
- Dynamically update the compression level and compression strategy. The
- interpretation of level and strategy is as in <a href="#deflateInit2">deflateInit2</a>. This can be
- used to switch between compression and straight copy of the input data, or
- to switch to a different kind of input data requiring a different
- strategy. If the compression level is changed, the input available so far
- is compressed with the old level (and may be flushed); the new level will
- take effect only at the next call of <a href="#deflate">deflate</a>().<p>
-
- Before the call of <a href="#deflateParams">deflateParams</a>, the stream <a href="#state">state</a> must be set as for
- a call of <a href="#deflate">deflate</a>(), since the currently available input may have to
- be compressed and flushed. In particular, strm-> <a href="#avail_out">avail_out</a> must be
- non-zero.<p>
-
- <a href="#deflateParams">deflateParams</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent or if a parameter was invalid, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
- if strm->avail_out was zero.<p>
-
-<font color="Blue"><dt> int <a name="inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);</font>
-
-<dd> This is another version of <a href="#inflateInit">inflateInit</a> with an extra parameter. The
- fields <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized
- before by the caller.<p>
-
- The windowBits parameter is the base two logarithm of the maximum window
- size (the size of the history buffer). It should be in the range 8..15 for
- this version of the library. The default value is 15 if <a href="#inflateInit">inflateInit</a> is used
- instead. If a compressed stream with a larger window size is given as
- input, <a href="#inflate">inflate</a>() will return with the error code <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> instead of
- trying to allocate a larger window.<p>
-
- <a href="#inflateInit2">inflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
- memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as a negative
- memLevel). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#inflateInit2">inflateInit2</a>
- does not perform any decompression apart from reading the zlib header if
- present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> may be
- modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)<p>
-
-<font color="Blue"><dt> int <a name="inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
-<dd>
- Initializes the decompression dictionary from the given uncompressed byte
- sequence. This function must be called immediately after a call of <a href="#inflate">inflate</a>
- if this call returned <a href="#Z_NEED_DICT">Z_NEED_DICT</a>. The dictionary chosen by the compressor
- can be determined from the Adler32 value returned by this call of
- <a href="#inflate">inflate</a>. The compressor and decompressor must use exactly the same
- dictionary (see <a href="#deflateSetDictionary">deflateSetDictionary</a>).<p>
-
- <a href="#inflateSetDictionary">inflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
- parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
- inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the given dictionary doesn't match the
- expected one (incorrect Adler32 value). <a href="#inflateSetDictionary">inflateSetDictionary</a> does not
- perform any decompression: this will be done by subsequent calls of
- <a href="#inflate">inflate</a>().<p>
-
-<font color="Blue"><dt> int <a name="inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-
-<dd> Skips invalid compressed data until a full flush point (see above the
- description of <a href="#deflate">deflate</a> with <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>) can be found, or until all
- available input is skipped. No output is provided.<p>
-
- <a href="#inflateSync">inflateSync</a> returns <a href="#Z_OK">Z_OK</a> if a full flush point has been found, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
- if no more input was provided, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if no flush point has been found,
- or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent. In the success
- case, the application may save the current current value of <a href="#total_in">total_in</a> which
- indicates where valid compressed data was found. In the error case, the
- application may repeatedly call <a href="#inflateSync">inflateSync</a>, providing more input each time,
- until success or end of the input data.<p>
-
-<font color="Blue"><dt> int <a name="inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
-<dd>
- This function is equivalent to <a href="#inflateEnd">inflateEnd</a> followed by <a href="#inflateInit">inflateInit</a>,
- but does not free and reallocate all the internal decompression <a href="#state">state</a>.
- The stream will keep attributes that may have been set by <a href="#inflateInit2">inflateInit2</a>.
- <p>
-
- <a href="#inflateReset">inflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
- stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).
- <p>
-</dl>
-
-<hr>
-<a name="Checksum functions"><h2> Checksum functions </h2>
- These functions are not related to compression but are exported
- anyway because they might be useful in applications using the
- compression library.
-<h3> Function list </h3>
-<ul>
-<li> uLong <a href="#adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);
-<li> uLong <a href="#crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);
-</ul>
-<h3> Function description </h3>
-<dl>
-<font color="Blue"><dt> uLong <a name="adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);</font>
-<dd>
- Update a running Adler-32 checksum with the bytes buf[0..len-1] and
- return the updated checksum. If buf is NULL, this function returns
- the required initial value for the checksum.
- <p>
- An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
- much faster. Usage example:
- <pre>
-
- uLong <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(<a href="#adler">adler</a>, buffer, length);
- }
- if (<a href="#adler">adler</a> != original_adler) error();
- </pre>
-
-<font color="Blue"><dt> uLong <a name="crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);</font>
-<dd>
- Update a running crc with the bytes buf[0..len-1] and return the updated
- crc. If buf is NULL, this function returns the required initial value
- for the crc. Pre- and post-conditioning (one's complement) is performed
- within this function so it shouldn't be done by the application.
- Usage example:
- <pre>
-
- uLong crc = <a href="#crc32">crc32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- crc = <a href="#crc32">crc32</a>(crc, buffer, length);
- }
- if (crc != original_crc) error();
- </pre>
-</dl>
-<hr>
-<a name="struct z_stream_s"><h2> struct z_stream_s </h2>
-<font color="Blue">
-<a name="z_stream_s">
-<pre>
-typedef struct z_stream_s {
- Bytef *<a name="next_in">next_in</a>; /* next input byte */
- uInt <a name="avail_in">avail_in</a>; /* number of bytes available at <a href="#next_in">next_in</a> */
- uLong <a name="total_in">total_in</a>; /* total nb of input bytes read so far */
-
- Bytef *<a name="next_out">next_out</a>; /* next output byte should be put there */
- uInt <a name="avail_out">avail_out</a>; /* remaining free space at <a href="#next_out">next_out</a> */
- uLong <a name="total_out">total_out</a>; /* total nb of bytes output so far */
-
- char *<a name="msg">msg</a>; /* last error message, NULL if no error */
- struct internal_state FAR *<a name="state">state</a>; /* not visible by applications */
-
- alloc_func <a name="zalloc">zalloc</a>; /* used to allocate the internal <a href="#state">state</a> */
- free_func <a name="zfree">zfree</a>; /* used to free the internal <a href="#state">state</a> */
- voidpf <a name="opaque">opaque</a>; /* private data object passed to <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> */
-
- int <a name="data_type">data_type</a>; /* best guess about the data type: ascii or binary */
- uLong <a name="adler">adler</a>; /* <a href="#adler32">adler32</a> value of the uncompressed data */
- uLong <a name="reserved">reserved</a>; /* <a href="#reserved">reserved</a> for future use */
-} <a href="#z_stream_s">z_stream</a> ;
-
-typedef <a href="#z_stream_s">z_stream</a> FAR * <a name="z_streamp">z_streamp</a>; ΓΏ
-</pre>
-</font>
- The application must update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> when <a href="#avail_in">avail_in</a> has
- dropped to zero. It must update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> when <a href="#avail_out">avail_out</a>
- has dropped to zero. The application must initialize <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and
- <a href="#opaque">opaque</a> before calling the init function. All other fields are set by the
- compression library and must not be updated by the application. <p>
-
- The <a href="#opaque">opaque</a> value provided by the application will be passed as the first
- parameter for calls of <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a>. This can be useful for custom
- memory management. The compression library attaches no meaning to the
- <a href="#opaque">opaque</a> value. <p>
-
- <a href="#zalloc">zalloc</a> must return <a href="#Z_NULL">Z_NULL</a> if there is not enough memory for the object.
- If zlib is used in a multi-threaded application, <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be
- thread safe. <p>
-
- On 16-bit systems, the functions <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be able to allocate
- exactly 65536 bytes, but will not be required to allocate more than this
- if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
- pointers returned by <a href="#zalloc">zalloc</a> for objects of exactly 65536 bytes *must*
- have their offset normalized to zero. The default allocation function
- provided by this library ensures this (see zutil.c). To reduce memory
- requirements and avoid any allocation of 64K objects, at the expense of
- compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
- <p>
-
- The fields <a href="#total_in">total_in</a> and <a href="#total_out">total_out</a> can be used for statistics or
- progress reports. After compression, <a href="#total_in">total_in</a> holds the total size of
- the uncompressed data and may be saved for use in the decompressor
- (particularly if the decompressor wants to decompress everything in
- a single step). <p>
-
-<hr>
-<a name="Constants"><h2> Constants </h2>
-<font color="Blue">
-<pre>
-#define <a name="Z_NO_FLUSH">Z_NO_FLUSH</a> 0
-#define <a name="Z_PARTIAL_FLUSH">Z_PARTIAL_FLUSH</a> 1
- /* will be removed, use <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> instead */
-#define <a name="Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> 2
-#define <a name="Z_FULL_FLUSH">Z_FULL_FLUSH</a> 3
-#define <a name="Z_FINISH">Z_FINISH</a> 4
-/* Allowed flush values ; see <a href="#deflate">deflate</a>() below for details */
-
-#define <a name="Z_OK">Z_OK</a> 0
-#define <a name="Z_STREAM_END">Z_STREAM_END</a> 1
-#define <a name="Z_NEED_DICT">Z_NEED_DICT</a> 2
-#define <a name="Z_ERRNO">Z_ERRNO</a> (-1)
-#define <a name="Z_STREAM_ERROR">Z_STREAM_ERROR</a> (-2)
-#define <a name="Z_DATA_ERROR">Z_DATA_ERROR</a> (-3)
-#define <a name="Z_MEM_ERROR">Z_MEM_ERROR</a> (-4)
-#define <a name="Z_BUF_ERROR">Z_BUF_ERROR</a> (-5)
-#define <a name="Z_VERSION_ERROR">Z_VERSION_ERROR</a> (-6)
-/* Return codes for the compression/decompression functions. Negative
- * values are errors, positive values are used for special but normal events.
- */
-
-#define <a name="Z_NO_COMPRESSION">Z_NO_COMPRESSION</a> 0
-#define <a name="Z_BEST_SPEED">Z_BEST_SPEED</a> 1
-#define <a name="Z_BEST_COMPRESSION">Z_BEST_COMPRESSION</a> 9
-#define <a name="Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> (-1)
-/* compression levels */
-
-#define <a name="Z_FILTERED">Z_FILTERED</a> 1
-#define <a name="Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> 2
-#define <a name="Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> 0
-/* compression strategy ; see <a href="#deflateInit2">deflateInit2</a>() below for details */
-
-#define <a name="Z_BINARY">Z_BINARY</a> 0
-#define <a name="Z_ASCII">Z_ASCII</a> 1
-#define <a name="Z_UNKNOWN">Z_UNKNOWN</a> 2
-/* Possible values of the <a href="#data_type">data_type</a> field */
-
-#define <a name="Z_DEFLATED">Z_DEFLATED</a> 8
-/* The <a href="#deflate">deflate</a> compression method (the only one supported in this version) */
-
-#define <a name="Z_NULL">Z_NULL</a> 0 /* for initializing <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a>, <a href="#opaque">opaque</a> */
-
-#define <a name="zlib_version">zlib_version</a> <a href="#zlibVersion">zlibVersion</a>()
-/* for compatibility with versions less than 1.0.2 */
-</pre>
-</font>
-
-<hr>
-<a name="Misc"><h2> Misc </h2>
- <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a> are macros to allow checking the zlib version
- and the compiler's view of <a href="#z_stream_s">z_stream</a>.
- <p>
- Other functions:
- <dl>
- <font color="Blue"><dt> const char * <a name="zError">zError</a> (int err);</font>
- <font color="Blue"><dt> int <a name="inflateSyncPoint">inflateSyncPoint</a> (<a href="#z_streamp">z_streamp</a> z);</font>
- <font color="Blue"><dt> const uLongf * <a name="get_crc_table">get_crc_table</a> (void);</font>
- </dl>
- <hr>
- <font size="-1">
- Last update: Wed Oct 13 20:42:34 1999<br>
- piapi@csie.ntu.edu.tw
- </font>
-
-</body>
-</html>
/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
extern void exit OF((int));
#endif
-const char *z_errmsg[10] = {
+const char * const z_errmsg[10] = {
"need dictionary", /* Z_NEED_DICT 2 */
"stream end", /* Z_STREAM_END 1 */
"", /* Z_OK 0 */
#ifdef __TURBOC__
#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
+#if !defined(__linux)
/* Small and medium model in Turbo C are for now limited to near allocation
* with reduced MAX_WBITS and MAX_MEM_LEVEL
*/
Assert(0, "zcfree: ptr not found");
}
#endif
+#endif
#endif /* __TURBOC__ */
#ifndef MY_ZCALLOC /* Any system without a special alloc function */
#ifndef STDC
+extern voidp malloc OF((uInt size));
extern voidp calloc OF((uInt items, uInt size));
extern void free OF((voidpf ptr));
#endif
unsigned size;
{
if (opaque) items += size - size; /* make compiler happy */
- return (voidpf)calloc(items, size);
+ return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+ (voidpf)calloc(items, size);
}
void zcfree (opaque, ptr)
/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
typedef ush FAR ushf;
typedef unsigned long ulg;
-extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
+extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
#endif
-typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
- uInt len));
voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void zcfree OF((voidpf opaque, voidpf ptr));
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