/* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-#if _LARGEFILE64_SOURCE
+#ifdef _LARGEFILE64_SOURCE
# ifndef _LARGEFILE_SOURCE
# define _LARGEFILE_SOURCE 1
# endif
# endif
#endif
-#define ZLIB_INTERNAL
+#ifdef HAVE_HIDDEN
+# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
+#else
+# define ZLIB_INTERNAL
+#endif
#include <stdio.h>
#include "zlib.h"
# include <stdlib.h>
# include <limits.h>
#endif
+
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
#include <fcntl.h>
+#ifdef _WIN32
+# include <stddef.h>
+#endif
+
+#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
+# include <io.h>
+#endif
+
+#if defined(_WIN32)
+# define WIDECHAR
+#endif
+
+#ifdef WINAPI_FAMILY
+# define open _open
+# define read _read
+# define write _write
+# define close _close
+#endif
+
#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
#endif
-#ifdef _MSC_VER
-# include <io.h>
-# define vsnprintf _vsnprintf
+#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#if defined(__CYGWIN__)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#ifndef HAVE_VSNPRINTF
+# ifdef MSDOS
+/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
+ but for now we just assume it doesn't. */
+# define NO_vsnprintf
+# endif
+# ifdef __TURBOC__
+# define NO_vsnprintf
+# endif
+# ifdef WIN32
+/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
+# if !defined(vsnprintf) && !defined(NO_vsnprintf)
+# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
+# define vsnprintf _vsnprintf
+# endif
+# endif
+# endif
+# ifdef __SASC
+# define NO_vsnprintf
+# endif
+# ifdef VMS
+# define NO_vsnprintf
+# endif
+# ifdef __OS400__
+# define NO_vsnprintf
+# endif
+# ifdef __MVS__
+# define NO_vsnprintf
+# endif
+#endif
+
+/* unlike snprintf (which is required in C99), _snprintf does not guarantee
+ null termination of the result -- however this is only used in gzlib.c where
+ the result is assured to fit in the space provided */
+#if defined(_MSC_VER) && _MSC_VER < 1900
+# define snprintf _snprintf
#endif
#ifndef local
# define local static
#endif
-/* compile with -Dlocal if your debugger can't find static symbols */
+/* since "static" is used to mean two completely different things in C, we
+ define "local" for the non-static meaning of "static", for readability
+ (compile with -Dlocal if your debugger can't find static symbols) */
/* gz* functions always use library allocation functions */
#ifndef STDC
# include <windows.h>
# define zstrerror() gz_strwinerror((DWORD)GetLastError())
#else
-# ifdef STDC
+# ifndef NO_STRERROR
# include <errno.h>
# define zstrerror() strerror(errno)
# else
# endif
#endif
-#if _LARGEFILE64_SOURCE
-# define z_off64_t off64_t
-#else
-# define z_off64_t z_off_t
-#endif
-
/* provide prototypes for these when building zlib without LFS */
-#if _LARGEFILE64_SOURCE+0 != 1 || _LFS64_LARGEFILE+0 != 1
+#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
- ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, off_t, int));
- ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));
- ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile));
+ ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
+ ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
+ ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
+#endif
+
+/* default memLevel */
+#if MAX_MEM_LEVEL >= 8
+# define DEF_MEM_LEVEL 8
+#else
+# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
-/* default i/o buffer size -- double this for output when reading */
+/* default i/o buffer size -- double this for output when reading (this and
+ twice this must be able to fit in an unsigned type) */
#define GZBUFSIZE 8192
/* gzip modes, also provide a little integrity check on the passed structure */
/* internal gzip file state data structure */
typedef struct {
+ /* exposed contents for gzgetc() macro */
+ struct gzFile_s x; /* "x" for exposed */
+ /* x.have: number of bytes available at x.next */
+ /* x.next: next output data to deliver or write */
+ /* x.pos: current position in uncompressed data */
/* used for both reading and writing */
int mode; /* see gzip modes above */
int fd; /* file descriptor */
char *path; /* path or fd for error messages */
- z_off64_t pos; /* current position in uncompressed data */
unsigned size; /* buffer size, zero if not allocated yet */
unsigned want; /* requested buffer size, default is GZBUFSIZE */
- unsigned char *in; /* input buffer */
+ unsigned char *in; /* input buffer (double-sized when writing) */
unsigned char *out; /* output buffer (double-sized when reading) */
- unsigned char *next; /* next output data to deliver or write */
+ int direct; /* 0 if processing gzip, 1 if transparent */
/* just for reading */
- unsigned have; /* amount of output data unused at next */
- int eof; /* true if end of input file reached */
- z_off64_t start; /* where the gzip data started, for rewinding */
- z_off64_t raw; /* where the raw data started, for seeking */
int how; /* 0: get header, 1: copy, 2: decompress */
- int direct; /* true if last read direct, false if gzip */
+ z_off64_t start; /* where the gzip data started, for rewinding */
+ int eof; /* true if end of input file reached */
+ int past; /* true if read requested past end */
/* just for writing */
int level; /* compression level */
int strategy; /* compression strategy */
+ int reset; /* true if a reset is pending after a Z_FINISH */
/* seek request */
z_off64_t skip; /* amount to skip (already rewound if backwards) */
int seek; /* true if seek request pending */
typedef gz_state FAR *gz_statep;
/* shared functions */
-ZEXTERN void ZEXPORT gz_error OF((gz_statep, int, const char *));
+void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
#if defined UNDER_CE
-ZEXTERN char ZEXPORT *gz_strwinerror OF((DWORD error));
+char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
#endif
/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
#ifdef INT_MAX
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
#else
-ZEXTERN unsigned ZEXPORT gz_intmax OF((void));
+unsigned ZLIB_INTERNAL gz_intmax OF((void));
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
#endif
projects / zlib.git / blobdiff