ChangeLog file for zlib
+Changes in 1.0.4 (24 Jul 96)
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+ bit, so the decompressor could decompress all the correct data but went
+ on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+- use z_error only for DEBUG (avoid problem with DLLs)
+
+Changes in 1.0.3 (2 Jul 96)
+- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
+ small and medium models; this makes the library incompatible with previous
+ versions for these models. (No effect in large model or on other systems.)
+- return OK instead of BUF_ERROR if previous deflate call returned with
+ avail_out as zero but there is nothing to do
+- added memcmp for non STDC compilers
+- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
+- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
+- better check for 16-bit mode MSC (avoids problem with Symantec)
+
Changes in 1.0.2 (23 May 96)
- added Windows DLL support
- added a function zlibVersion (for the DLL support)
Makefile.dj2 makefile for DJGPP 2.x
Makefile.in makefile for Unix (template for configure)
Makefile.msc makefile for Microsoft C 16-bit
+Makefile.riscos makefile for RISCOS
Makefile.sas makefile for Amiga SAS/C
Makefile.tc makefile for Turbo C
Makefile.wat makefile for Watcom C
LDFLAGS=-L. -lz
LDSHARED=$(CC)
-VER=1.0.2
+VER=1.0.4
LIBS=libz.a
AR=ar rc
LD=$(CC) -s -o
LDSHARED=$(CC)
-VER=1.0.2
INCL=zlib.h zconf.h
LIBS=libz.a
libz.a: $(OBJS)
$(AR) $@ $(OBJS)
-libz.so.$(VER): $(OBJS)
- $(LDSHARED) -o $@ $(OBJS)
- $(RM) libz.so; ln -s $@ libz.so
-
%.exe : %.o $(LIBS)
$(LD) $@ $< $(LDLIBS)
for %%p in ($(LIBS)) do $(RM) $(LIBRARY_PATH)\%%p
clean:
- for %%p in (*.d *.o *.exe libz.a libz.so*) do $(RM) %%p
+ for %%p in (*.d *.o *.exe libz.a libz.so* foo.gz) do $(RM) %%p
DEPS := $(wildcard *.d)
ifneq ($(DEPS),)
LDFLAGS=-L. -lz
LDSHARED=$(CC)
-VER=1.0.2
+VER=1.0.4
LIBS=libz.a
AR=ar rc
OBJP2 = zutil$(O)+inflate$(O)+infblock$(O)+inftrees$(O)+infcodes$(O)+\
infutil$(O)+inffast$(O)
+all: zlib.lib example.exe minigzip.exe
+
adler32.obj: adler32.c zutil.h 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
+ if exist zlib.lib del zlib.lib
lib zlib $(OBJ1);
lib zlib $(OBJ2);
--- /dev/null
+# Project: zlib_1_03
+
+
+# Toolflags:
+CCflags = -c -depend !Depend -IC: -g -throwback -DRISCOS -fnah
+C++flags = -c -depend !Depend -IC: -throwback
+Linkflags = -aif -c++ -o $@
+ObjAsmflags = -throwback -NoCache -depend !Depend
+CMHGflags =
+LibFileflags = -c -l -o $@
+Squeezeflags = -o $@
+
+
+# Final targets:
+@.zlib_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.uncompress @.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.uncompress @.o.zutil
+@.test: @.tests.minigzip @.tests.example
+ echo Please run "Test" in directory tests
+@.tests.minigzip: @.o.minigzip @.zlib_lib C:o.Stubs
+ Link $(Linkflags) @.o.minigzip @.zlib_lib C:o.Stubs
+@.tests.example: @.o.example @.zlib_lib C:o.Stubs
+ Link $(Linkflags) @.o.example @.zlib_lib C:o.Stubs
+
+
+# User-editable dependencies:
+.c.o:
+ cc $(ccflags) -o $@ $<
+
+# Static dependencies:
+@.o.example: @.tests.c.example
+ cc $(ccflags) -o @.o.example @.tests.c.example
+@.o.minigzip: @.tests.c.minigzip
+ cc $(ccflags) -o @.o.minigzip @.tests.c.minigzip
+
+
+# Dynamic dependencies:
+o.minigzip: tests.c.minigzip
+o.minigzip: h.zlib
+o.minigzip: h.zconf
+o.example: tests.c.example
+o.example: h.zlib
+o.example: h.zconf
-zlib 1.0.2 is a general purpose data compression library. All the code
+zlib 1.0.4 is a general purpose data compression library. All the code
is reentrant (thread safe). 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 (zlib format), rfc1951.txt (deflate
Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov> or,
if this fails, to the addresses given below in the Copyright section.
+The zlib home page is http://quest.jpl.nasa.gov/zlib/
+
+The changes made in version 1.0.4 are documented in the file ChangeLog.
+The main changes since 1.0.3 are:
+
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+ bit, so the decompressor could decompress all the correct data but went
+ on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
-The changes made in version 1.0.2 are documented in the file ChangeLog.
-The main changes since 0.99 are:
-
-- fix array overlay in deflate.c which sometimes caused bad compressed data
-- fix inflate bug with empty stored block
-- fix MSDOS medium model which was broken in 0.99
-- fix deflateParams() which could generated bad compressed data.
-- added an INDEX file
-- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
- Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
-- several portability improvements
-- added algorithm.doc
-- added Windows DLL support
-- added a function zlibVersion (for the DLL support)
A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
- For 64-bit Iris, deflate.c must be compiled without any optimization.
With -O, one libpng test fails. The test works in 32 bit mode (with
- the -32 compiler flag).
+ the -32 compiler flag). The compiler bug has been reported to SGI.
- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
it works when compiled with cc.
- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL
For help on building a zlib DLL, contact Alessandro Iacopetti
- <iaco@cicladi.unial.it>
+ <iaco@email.alessandria.alpcom.it> http://lisa.unial.it/iaco ,
+ or contact Brad Clarke <bclarke@cyberus.ca>.
+
+- gzdopen is not supported on RISCOS
Acknowledgments:
length). Distances are limited to 32K bytes, and lengths are limited
to 258 bytes. When a string does not occur anywhere in the previous
32K bytes, it is emitted as a sequence of literal bytes. (In this
-description, 'string' must be taken as an arbitrary sequence of bytes,
+description, `string' must be taken as an arbitrary sequence of bytes,
and is not restricted to printable characters.)
Literals or match lengths are compressed with one Huffman tree, and
size (except that the compressed data for one block must fit in
available memory). A block is terminated when deflate() determines that
it would be useful to start another block with fresh trees. (This is
-somewhat similar to compress.)
+somewhat similar to the behavior of LZW-based _compress_.)
Duplicated strings are found using a hash table. All input strings of
length 3 are inserted in the hash table. A hash index is computed for
2. Decompression algorithm (inflate)
-The real question is given a Huffman tree, how to decode fast. The most
+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.
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
+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
References:
-[LZ77] Ziv J., Lempel A., "A Universal Algorithm for Sequential Data
-Compression", IEEE Transactions on Information Theory", Vol. 23, No. 3,
+[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
+Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
pp. 337-343.
-"DEFLATE Compressed Data Format Specification" available in
+``DEFLATE Compressed Data Format Specification'' available in
ftp://ds.internic.net/rfc/rfc1951.txt
*
*/
-/* $Id: deflate.c,v 1.13 1996/05/22 11:52:21 me Exp $ */
+/* $Id: deflate.c,v 1.15 1996/07/24 13:40:58 me Exp $ */
#include "deflate.h"
-char deflate_copyright[] = " deflate 1.0.2 Copyright 1995-1996 Jean-loup Gailly ";
+char deflate_copyright[] = " deflate 1.0.4 Copyright 1995-1996 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
/* ===========================================================================
* Function prototypes.
*/
+typedef enum {
+ need_more, /* block not completed, need more input or more output */
+ block_done, /* block flush performed */
+ finish_started, /* finish started, need only more output at next deflate */
+ finish_done /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
local void fill_window OF((deflate_state *s));
-local int deflate_stored OF((deflate_state *s, int flush));
-local int deflate_fast OF((deflate_state *s, int flush));
-local int deflate_slow OF((deflate_state *s, int flush));
+local block_state deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_fast OF((deflate_state *s, int flush));
+local block_state deflate_slow OF((deflate_state *s, int flush));
local void lm_init OF((deflate_state *s));
local uInt longest_match OF((deflate_state *s, IPos cur_match));
local void putShortMSB OF((deflate_state *s, uInt b));
-local void flush_pending OF((z_stream *strm));
-local int read_buf OF((z_stream *strm, charf *buf, unsigned size));
+local void flush_pending OF((z_streamp strm));
+local int read_buf OF((z_streamp strm, charf *buf, unsigned size));
#ifdef ASMV
void match_init OF((void)); /* asm code initialization */
#endif
* See deflate.c for comments about the MIN_MATCH+1.
*/
-typedef int (*compress_func) OF((deflate_state *s, int flush));
-/* Compressing function */
-
/* Values for max_lazy_match, good_match and max_chain_length, depending on
* the desired pack level (0..9). The values given below have been tuned to
* exclude worst case performance for pathological files. Better values may be
/* ========================================================================= */
int deflateInit_(strm, level, version, stream_size)
- z_stream *strm;
+ z_streamp strm;
int level;
const char *version;
int stream_size;
/* ========================================================================= */
int deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
version, stream_size)
- z_stream *strm;
+ z_streamp strm;
int level;
int method;
int windowBits;
if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
s->pending_buf == Z_NULL) {
- strm->msg = ERR_MSG(Z_MEM_ERROR);
+ strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
deflateEnd (strm);
return Z_MEM_ERROR;
}
/* ========================================================================= */
int deflateSetDictionary (strm, dictionary, dictLength)
- z_stream *strm;
+ z_streamp strm;
const Bytef *dictionary;
uInt dictLength;
{
/* ========================================================================= */
int deflateReset (strm)
- z_stream *strm;
+ z_streamp strm;
{
deflate_state *s;
/* ========================================================================= */
int deflateParams(strm, level, strategy)
- z_stream *strm;
+ z_streamp strm;
int level;
int strategy;
{
* (See also read_buf()).
*/
local void flush_pending(strm)
- z_stream *strm;
+ z_streamp strm;
{
unsigned len = strm->state->pending;
/* ========================================================================= */
int deflate (strm, flush)
- z_stream *strm;
+ z_streamp strm;
int flush;
{
int old_flush; /* value of flush param for previous deflate call */
deflate_state *s;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-
+ if (strm == Z_NULL || strm->state == Z_NULL ||
+ flush > Z_FINISH || flush < 0) {
+ return Z_STREAM_ERROR;
+ }
s = strm->state;
if (strm->next_out == Z_NULL ||
if (s->strstart != 0) {
putShortMSB(s, (uInt)(strm->adler >> 16));
putShortMSB(s, (uInt)(strm->adler & 0xffff));
- strm->adler = 1L;
}
+ strm->adler = 1L;
}
/* Flush as much pending output as possible */
if (s->pending != 0) {
flush_pending(strm);
- if (strm->avail_out == 0) return Z_OK;
+ if (strm->avail_out == 0) {
+ /* Since avail_out is 0, deflate will be called again with
+ * more output space, but possibly with both pending and
+ * avail_in equal to zero. There won't be anything to do,
+ * but this is not an error situation so make sure we
+ * return OK instead of BUF_ERROR at next call of deflate:
+ */
+ s->last_flush = -1;
+ return Z_OK;
+ }
/* Make sure there is something to do and avoid duplicate consecutive
* flushes. For repeated and useless calls with Z_FINISH, we keep
*/
if (strm->avail_in != 0 || s->lookahead != 0 ||
(flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
- int quit;
+ block_state bstate;
- if (flush == Z_FINISH) {
+ bstate = (*(configuration_table[s->level].func))(s, flush);
+
+ if (bstate == finish_started || bstate == finish_done) {
s->status = FINISH_STATE;
}
- quit = (*(configuration_table[s->level].func))(s, flush);
-
- if (quit || strm->avail_out == 0) return Z_OK;
- /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
- * of deflate should use the same flush parameter to make sure
- * that the flush is complete. So we don't have to output an
- * empty block here, this will be done at next call. This also
- * ensures that for a very small output buffer, we emit at most
- * one empty block.
- */
- if (flush != Z_NO_FLUSH && flush != Z_FINISH) {
+ if (bstate == need_more || bstate == finish_started) {
+ if (strm->avail_out == 0) {
+ s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
+ }
+ return Z_OK;
+ /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+ * of deflate should use the same flush parameter to make sure
+ * that the flush is complete. So we don't have to output an
+ * empty block here, this will be done at next call. This also
+ * ensures that for a very small output buffer, we emit at most
+ * one empty block.
+ */
+ }
+ if (bstate == block_done) {
if (flush == Z_PARTIAL_FLUSH) {
_tr_align(s);
} else { /* FULL_FLUSH or SYNC_FLUSH */
}
}
flush_pending(strm);
- if (strm->avail_out == 0) return Z_OK;
+ if (strm->avail_out == 0) {
+ s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+ return Z_OK;
+ }
}
}
Assert(strm->avail_out > 0, "bug2");
/* ========================================================================= */
int deflateEnd (strm)
- z_stream *strm;
+ z_streamp strm;
{
int status;
/* ========================================================================= */
int deflateCopy (dest, source)
- z_stream *dest;
- z_stream *source;
+ z_streamp dest;
+ z_streamp source;
{
if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
return Z_STREAM_ERROR;
* (See also flush_pending()).
*/
local int read_buf(strm, buf, size)
- z_stream *strm;
+ z_streamp strm;
charf *buf;
unsigned size;
{
/* Same but force premature exit if necessary. */
#define FLUSH_BLOCK(s, eof) { \
FLUSH_BLOCK_ONLY(s, eof); \
- if (s->strm->avail_out == 0) return 1; \
+ if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
}
/* ===========================================================================
* Copy without compression as much as possible from the input stream, return
- * true if processing was terminated prematurely (no more input or output
- * space). This function does not insert new strings in the dictionary
- * since uncompressible data is probably not useful. This function is used
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
* only for the level=0 compression option.
* NOTE: this function should be optimized to avoid extra copying.
*/
-local int deflate_stored(s, flush)
+local block_state deflate_stored(s, flush)
deflate_state *s;
int flush;
{
s->block_start >= (long)s->w_size, "slide too late");
fill_window(s);
- if (s->lookahead == 0 && flush == Z_NO_FLUSH) return 1;
+ if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
if (s->lookahead == 0) break; /* flush the current block */
}
}
}
FLUSH_BLOCK(s, flush == Z_FINISH);
- return 0; /* normal exit */
+ return flush == Z_FINISH ? finish_done : block_done;
}
/* ===========================================================================
- * Compress as much as possible from the input stream, return true if
- * processing was terminated prematurely (no more input or output space).
+ * Compress as much as possible from the input stream, return the current
+ * block state.
* This function does not perform lazy evaluation of matches and inserts
* new strings in the dictionary only for unmatched strings or for short
* matches. It is used only for the fast compression options.
*/
-local int deflate_fast(s, flush)
+local block_state deflate_fast(s, flush)
deflate_state *s;
int flush;
{
*/
if (s->lookahead < MIN_LOOKAHEAD) {
fill_window(s);
- if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) return 1;
-
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+ return need_more;
+ }
if (s->lookahead == 0) break; /* flush the current block */
}
if (bflush) FLUSH_BLOCK(s, 0);
}
FLUSH_BLOCK(s, flush == Z_FINISH);
- return 0; /* normal exit */
+ return flush == Z_FINISH ? finish_done : block_done;
}
/* ===========================================================================
* evaluation for matches: a match is finally adopted only if there is
* no better match at the next window position.
*/
-local int deflate_slow(s, flush)
+local block_state deflate_slow(s, flush)
deflate_state *s;
int flush;
{
*/
if (s->lookahead < MIN_LOOKAHEAD) {
fill_window(s);
- if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) return 1;
-
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+ return need_more;
+ }
if (s->lookahead == 0) break; /* flush the current block */
}
}
s->strstart++;
s->lookahead--;
- if (s->strm->avail_out == 0) return 1;
+ if (s->strm->avail_out == 0) return need_more;
} else {
/* There is no previous match to compare with, wait for
* the next step to decide.
s->match_available = 0;
}
FLUSH_BLOCK(s, flush == Z_FINISH);
- return 0;
+ return flush == Z_FINISH ? finish_done : block_done;
}
-
subject to change. Applications should only use zlib.h.
*/
-/* $Id: deflate.h,v 1.9 1996/01/30 21:59:13 me Exp $ */
+/* $Id: deflate.h,v 1.10 1996/07/02 12:41:00 me Exp $ */
#ifndef _DEFLATE_H
#define _DEFLATE_H
*/
typedef struct internal_state {
- z_stream *strm; /* pointer back to this zlib stream */
+ z_streamp strm; /* pointer back to this zlib stream */
int status; /* as the name implies */
Bytef *pending_buf; /* output still pending */
Bytef *pending_out; /* next pending byte to output to the stream */
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-/* $Id: gzio.c,v 1.13 1996/05/22 11:52:24 me Exp $ */
+/* $Id: gzio.c,v 1.14 1996/07/24 13:41:01 me Exp $ */
#include <stdio.h>
errnum is set to Z_ERRNO and the application may consult errno
to get the exact error code.
*/
-char* gzerror (file, errnum)
+const char* gzerror (file, errnum)
gzFile file;
int *errnum;
{
if (s == NULL) {
*errnum = Z_STREAM_ERROR;
- return ERR_MSG(Z_STREAM_ERROR);
+ return (const char*)ERR_MSG(Z_STREAM_ERROR);
}
*errnum = s->z_err;
- if (*errnum == Z_OK) return (char*)"";
+ if (*errnum == Z_OK) return (const char*)"";
m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
- if (m == NULL || *m == '\0') m = ERR_MSG(s->z_err);
+ 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);
strcpy(s->msg, s->path);
strcat(s->msg, ": ");
strcat(s->msg, m);
- return s->msg;
+ return (const char*)s->msg;
}
void inflate_blocks_reset(s, z, c)
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
uLongf *c;
{
if (s->checkfn != Z_NULL)
inflate_blocks_statef *inflate_blocks_new(z, c, w)
-z_stream *z;
+z_streamp z;
check_func c;
uInt w;
{
#endif
int inflate_blocks(s, z, r)
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
int r;
{
uInt t; /* temporary storage */
int inflate_blocks_free(s, z, c)
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
uLongf *c;
{
inflate_blocks_reset(s, z, c);
typedef struct inflate_blocks_state FAR inflate_blocks_statef;
extern inflate_blocks_statef * inflate_blocks_new OF((
- z_stream *z,
+ z_streamp z,
check_func c, /* check function */
uInt w)); /* window size */
extern int inflate_blocks OF((
inflate_blocks_statef *,
- z_stream *,
+ z_streamp ,
int)); /* initial return code */
extern void inflate_blocks_reset OF((
inflate_blocks_statef *,
- z_stream *,
+ z_streamp ,
uLongf *)); /* check value on output */
extern int inflate_blocks_free OF((
inflate_blocks_statef *,
- z_stream *,
+ z_streamp ,
uLongf *)); /* check value on output */
extern void inflate_set_dictionary OF((
uInt bl, bd;
inflate_huft *tl;
inflate_huft *td; /* need separate declaration for Borland C++ */
-z_stream *z;
+z_streamp z;
{
inflate_codes_statef *c;
int inflate_codes(s, z, r)
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
int r;
{
uInt j; /* temporary storage */
void inflate_codes_free(c, z)
inflate_codes_statef *c;
-z_stream *z;
+z_streamp z;
{
ZFREE(z, c);
Tracev((stderr, "inflate: codes free\n"));
extern inflate_codes_statef *inflate_codes_new OF((
uInt, uInt,
inflate_huft *, inflate_huft *,
- z_stream *));
+ z_streamp ));
extern int inflate_codes OF((
inflate_blocks_statef *,
- z_stream *,
+ z_streamp ,
int));
extern void inflate_codes_free OF((
inflate_codes_statef *,
- z_stream *));
+ z_streamp ));
inflate_huft *tl;
inflate_huft *td; /* need separate declaration for Borland C++ */
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
{
inflate_huft *t; /* temporary pointer */
uInt e; /* extra bits or operation */
inflate_huft *,
inflate_huft *,
inflate_blocks_statef *,
- z_stream *));
+ z_streamp ));
int inflateReset(z)
-z_stream *z;
+z_streamp z;
{
uLong c;
int inflateEnd(z)
-z_stream *z;
+z_streamp z;
{
uLong c;
int inflateInit2_(z, w, version, stream_size)
-z_stream *z;
+z_streamp z;
int w;
const char *version;
int stream_size;
int inflateInit_(z, version, stream_size)
-z_stream *z;
+z_streamp z;
const char *version;
int stream_size;
{
#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
int inflate(z, f)
-z_stream *z;
+z_streamp z;
int f;
{
int r;
int inflateSetDictionary(z, dictionary, dictLength)
-z_stream *z;
+z_streamp z;
const Bytef *dictionary;
uInt 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;
int inflateSync(z)
-z_stream *z;
+z_streamp z;
{
uInt n; /* number of bytes to look at */
Bytef *p; /* pointer to bytes */
#include "zutil.h"
#include "inftrees.h"
-char inflate_copyright[] = " inflate 1.0.2 Copyright 1995-1996 Mark Adler ";
+char inflate_copyright[] = " inflate 1.0.4 Copyright 1995-1996 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
uIntf *, /* list of extra bits for non-simple codes */
inflate_huft * FAR*,/* result: starting table */
uIntf *, /* maximum lookup bits (returns actual) */
- z_stream *)); /* for zalloc function */
+ z_streamp )); /* for zalloc function */
local voidpf falloc OF((
voidpf, /* opaque pointer (not used) */
uIntf *e; /* list of extra bits for non-simple codes */
inflate_huft * FAR *t; /* result: starting table */
uIntf *m; /* maximum lookup bits, returns actual */
-z_stream *zs; /* for zalloc function */
+z_streamp zs; /* for zalloc function */
/* 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
uIntf *c; /* 19 code lengths */
uIntf *bb; /* bits tree desired/actual depth */
inflate_huft * FAR *tb; /* bits tree result */
-z_stream *z; /* for zfree function */
+z_streamp z; /* for zfree function */
{
int r;
uIntf *bd; /* distance desired/actual bit depth */
inflate_huft * FAR *tl; /* literal/length tree result */
inflate_huft * FAR *td; /* distance tree result */
-z_stream *z; /* for zfree function */
+z_streamp z; /* for zfree function */
{
int r;
int inflate_trees_free(t, z)
inflate_huft *t; /* table to free */
-z_stream *z; /* for zfree function */
+z_streamp z; /* for zfree function */
/* Free the malloc'ed tables built by huft_build(), which makes a linked
list of the tables it made, with the links in a dummy first entry of
each table. */
uIntf *, /* 19 code lengths */
uIntf *, /* bits tree desired/actual depth */
inflate_huft * FAR *, /* bits tree result */
- z_stream *)); /* for zalloc, zfree functions */
+ z_streamp )); /* for zalloc, zfree functions */
extern int inflate_trees_dynamic OF((
uInt, /* number of literal/length codes */
uIntf *, /* distance desired/actual bit depth */
inflate_huft * FAR *, /* literal/length tree result */
inflate_huft * FAR *, /* distance tree result */
- z_stream *)); /* for zalloc, zfree functions */
+ z_streamp )); /* for zalloc, zfree functions */
extern int inflate_trees_fixed OF((
uIntf *, /* literal desired/actual bit depth */
extern int inflate_trees_free OF((
inflate_huft *, /* tables to free */
- z_stream *)); /* for zfree function */
+ z_streamp )); /* for zfree function */
/* copy as much as possible from the sliding window to the output area */
int inflate_flush(s, z, r)
inflate_blocks_statef *s;
-z_stream *z;
+z_streamp z;
int r;
{
uInt n;
/* copy as much as possible from the sliding window to the output area */
extern int inflate_flush OF((
inflate_blocks_statef *,
- z_stream *,
+ z_streamp ,
int));
struct internal_state {int dummy;}; /* for buggy compilers */
* or in pipe mode.
*/
-/* $Id: minigzip.c,v 1.9 1996/05/22 11:52:32 me Exp $ */
+/* $Id: minigzip.c,v 1.10 1996/07/24 13:41:04 me Exp $ */
#include <stdio.h>
#include "zlib.h"
#ifdef VMS
# define unlink delete
# define GZ_SUFFIX "-gz"
-#else
+#endif
+#ifdef RISCOS
+# define unlink remove
+# define GZ_SUFFIX "-gz"
+# define fileno(file) file->__file
+#endif
+
+#ifndef GZ_SUFFIX
# define GZ_SUFFIX ".gz"
#endif
#define SUFFIX_LEN sizeof(GZ_SUFFIX)
* Addison-Wesley, 1983. ISBN 0-201-06672-6.
*/
-/* $Id: trees.c,v 1.10 1996/05/22 11:52:34 me Exp $ */
+/* $Id: trees.c,v 1.11 1996/07/24 13:41:06 me Exp $ */
#include "deflate.h"
#else /* DEBUG */
# define send_code(s, c, tree) \
- { if (verbose>1) fprintf(stderr,"\ncd %3d ",(c)); \
+ { if (verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
send_bits(s, tree[c].Code, tree[c].Len); }
#endif
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-/* $Id: zconf.h,v 1.18 1996/05/23 16:51:18 me Exp $ */
+/* $Id: zconf.h,v 1.20 1996/07/02 15:09:28 me Exp $ */
#ifndef _ZCONF_H
#define _ZCONF_H
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
# define WIN32
#endif
-#if (defined(__GNUC__) || defined(WIN32)) && !defined(__32BIT__)
-# define __32BIT__
+#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
+# ifndef __32BIT__
+# define __32BIT__
+# endif
#endif
#if defined(__MSDOS__) && !defined(MSDOS)
# define MSDOS
# endif
#endif
-#ifdef __MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
-# include <unix.h>
-# define NO_DUMMY_DECL /* buggy compiler merges all .h files incorrectly */
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
+# define NO_DUMMY_DECL
#endif
/* Maximum value for memLevel in deflateInit2 */
#ifndef FAR
# define FAR
#endif
-/* The Watcom compiler defines M_I86SM and __SMALL__ even in 32 bit mode */
-#if defined(__WATCOMC__) && defined(__386__) && defined(SMALL_MEDIUM)
-# undef FAR
-# define FAR
-# undef SMALL_MEDIUM
-#endif
typedef unsigned char Byte; /* 8 bits */
typedef unsigned int uInt; /* 16 bits or more */
STUB 'WINSTUB.EXE'
-VERSION 1.0.2
+VERSION 1.04
CODE EXECUTE READ
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.0.2, May 23rd, 1996.
+ version 1.0.4, Jul 24th, 1996.
Copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler
#include "zconf.h"
-#define ZLIB_VERSION "1.0.2"
+#define ZLIB_VERSION "1.0.4"
/*
The 'zlib' compression library provides in-memory compression and
uLong reserved; /* reserved for future use */
} z_stream;
+typedef z_stream FAR *z_streamp;
+
/*
The application must update next_in and avail_in when avail_in has
dropped to zero. It must update next_out and avail_out when avail_out
/* basic functions */
-extern char EXPORT *zlibVersion OF((void));
+extern const char * EXPORT zlibVersion OF((void));
/* The application can compare zlibVersion 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.
*/
/*
-extern int EXPORT deflateInit OF((z_stream *strm, int level));
+extern int EXPORT deflateInit OF((z_streamp strm, int level));
Initializes the internal stream state for compression. The fields
zalloc, zfree and opaque must be initialized before by the caller.
*/
-extern int EXPORT deflate OF((z_stream *strm, int flush));
+extern int EXPORT deflate OF((z_streamp strm, int flush));
/*
Performs one or both of the following actions:
parameter and more output space (updated avail_out), until the flush is
complete (deflate returns with non-zero avail_out).
- If the parameter flush is set to Z_FINISH, all pending input is processed,
- all pending output is flushed and deflate returns with Z_STREAM_END if there
+ 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
was enough output space; if deflate returns with Z_OK, this function must be
called again with Z_FINISH and more output space (updated avail_out) but no
more input data, until it returns with Z_STREAM_END or an error. After
*/
-extern int EXPORT deflateEnd OF((z_stream *strm));
+extern int EXPORT deflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any
/*
-extern int EXPORT inflateInit OF((z_stream *strm));
+extern int EXPORT inflateInit OF((z_streamp strm));
Initializes the internal stream state for decompression. The fields
zalloc, zfree and opaque must be initialized before by the caller. If
*/
-extern int EXPORT inflate OF((z_stream *strm, int flush));
+extern int EXPORT inflate OF((z_streamp strm, int flush));
/*
Performs one or both of the following actions:
*/
-extern int EXPORT inflateEnd OF((z_stream *strm));
+extern int EXPORT inflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any
*/
/*
-extern int EXPORT deflateInit2 OF((z_stream *strm,
+extern int EXPORT deflateInit2 OF((z_streamp strm,
int level,
int method,
int windowBits,
deflate().
*/
-extern int EXPORT deflateSetDictionary OF((z_stream *strm,
+extern int EXPORT deflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dictLength));
/*
be done by deflate().
*/
-extern int EXPORT deflateCopy OF((z_stream *dest,
- z_stream *source));
+extern int EXPORT deflateCopy OF((z_streamp dest,
+ z_streamp source));
/*
Sets the destination stream as a complete copy of the source stream. If
the source stream is using an application-supplied history buffer, a new
destination.
*/
-extern int EXPORT deflateReset OF((z_stream *strm));
+extern int EXPORT deflateReset OF((z_streamp strm));
/*
This function is equivalent to deflateEnd followed by deflateInit,
but does not free and reallocate all the internal compression state.
stream state was inconsistent (such as zalloc or state being NULL).
*/
-extern int EXPORT deflateParams OF((z_stream *strm, int level, int strategy));
+extern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy));
/*
Dynamically update the compression level and compression strategy.
This can be used to switch between compression and straight copy of
*/
/*
-extern int EXPORT inflateInit2 OF((z_stream *strm,
+extern int EXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
This is another version of inflateInit with more compression options. The
inflate().
*/
-extern int EXPORT inflateSetDictionary OF((z_stream *strm,
+extern int EXPORT inflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dictLength));
/*
inflate().
*/
-extern int EXPORT inflateSync OF((z_stream *strm));
+extern int EXPORT inflateSync OF((z_streamp strm));
/*
Skips invalid compressed data until the special marker (see deflate()
above) can be found, or until all available input is skipped. No output
until success or end of the input data.
*/
-extern int EXPORT inflateReset OF((z_stream *strm));
+extern int EXPORT inflateReset OF((z_streamp strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state.
error number (see function gzerror below).
*/
-extern char EXPORT *gzerror OF((gzFile file, int *errnum));
+extern const char * EXPORT gzerror OF((gzFile file, int *errnum));
/*
Returns the error message for the last error which occurred on the
given compressed file. errnum is set to zlib error number. If an
/* deflateInit and inflateInit are macros to allow checking the zlib version
* and the compiler's view of z_stream:
*/
-extern int EXPORT deflateInit_ OF((z_stream *strm, int level,
+extern int EXPORT deflateInit_ OF((z_streamp strm, int level,
const char *version, int stream_size));
-extern int EXPORT inflateInit_ OF((z_stream *strm,
+extern int EXPORT inflateInit_ OF((z_streamp strm,
const char *version, int stream_size));
-extern int EXPORT deflateInit2_ OF((z_stream *strm, int level, int method,
+extern int EXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
int windowBits, int memLevel, int strategy,
const char *version, int stream_size));
-extern int EXPORT inflateInit2_ OF((z_stream *strm, int windowBits,
+extern int EXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size));
#define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
#define IDR_VERSION1 1
IDR_VERSION1 VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
- FILEVERSION 1,0,2,0
- PRODUCTVERSION 1,0,2,0
+ FILEVERSION 1,0,4,0
+ PRODUCTVERSION 1,0,4,0
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
FILEFLAGS 0
FILEOS VOS_DOS_WINDOWS32
BEGIN
VALUE "FileDescription", "zlib data compression library\0"
- VALUE "FileVersion", "1.0.2\0"
+ VALUE "FileVersion", "1.0.4\0"
VALUE "InternalName", "zlib\0"
VALUE "OriginalFilename", "zlib.lib\0"
VALUE "ProductName", "ZLib.DLL\0"
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-/* $Id: zutil.c,v 1.15 1996/05/23 17:11:36 me Exp $ */
+/* $Id: zutil.c,v 1.17 1996/07/24 13:41:12 me Exp $ */
#include <stdio.h>
""};
-char *zlibVersion()
+const char *zlibVersion()
{
return ZLIB_VERSION;
}
+#ifdef DEBUG
void z_error (m)
char *m;
{
fprintf(stderr, "%s\n", m);
exit(1);
}
+#endif
#ifndef HAVE_MEMCPY
} while (--len != 0);
}
+int zmemcmp(s1, s2, len)
+ Bytef* s1;
+ Bytef* s2;
+ uInt len;
+{
+ uInt j;
+
+ for (j = 0; j < len; j++) {
+ if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+ }
+ return 0;
+}
+
void zmemzero(dest, len)
Bytef* dest;
uInt len;
return;
}
ptr = opaque; /* just to make some compilers happy */
- z_error("zcfree: ptr not found");
+ Assert(0, "zcfree: ptr not found");
}
#endif
#endif /* __TURBOC__ */
-#if defined(M_I86) && !(defined(__WATCOMC__) && defined(__386__))
-/* Microsoft C */
+#if defined(M_I86) && !defined(__32BIT__)
+/* Microsoft C in 16-bit mode */
# define MY_ZCALLOC
subject to change. Applications should only use zlib.h.
*/
-/* $Id: zutil.h,v 1.14 1996/05/22 11:52:40 me Exp $ */
+/* $Id: zutil.h,v 1.16 1996/07/24 13:41:13 me Exp $ */
#ifndef _Z_UTIL_H
#define _Z_UTIL_H
#include "zlib.h"
-#if defined(MSDOS) || defined(VMS) || defined(CRAY) || defined(WIN32)
+#if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS)
# include <stddef.h>
# include <errno.h>
#else
extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */
-#define ERR_MSG(err) (char*)z_errmsg[Z_NEED_DICT-(err)]
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
#define ERR_RETURN(strm,err) \
- return (strm->msg = ERR_MSG(err), (err))
+ return (strm->msg = (char*)ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */
/* common constants */
# define OS_CODE 0x0a
#endif
-#ifdef _BEOS_
+#if defined(_BEOS_) || defined(RISCOS)
# define fdopen(fd,mode) NULL /* No fdopen() */
#endif
# endif
#else
extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len));
+ extern int zmemcmp OF((Bytef* s1, Bytef* s2, uInt len));
extern void zmemzero OF((Bytef* dest, uInt len));
#endif
# ifndef verbose
# define verbose 0
# endif
+ extern void z_error OF((char *m));
# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) fprintf x
# define Tracev(x) {if (verbose) fprintf x ;}
typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len));
-extern void z_error OF((char *m));
-
voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void zcfree OF((voidpf opaque, voidpf ptr));
projects / zlib.git / commitdiff