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zutil.h 6.52 KiB
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2024 Jean-loup Gailly, 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.
*/
/* @(#) $Id$ */
#ifndef ZUTIL_H
#define ZUTIL_H
#ifdef HAVE_HIDDEN
# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
# define ZLIB_INTERNAL
#endif
#include "zlib.h"
#if defined(STDC) && !defined(Z_SOLO)
# if !(defined(_WIN32_WCE) && defined(_MSC_VER))
# include <stddef.h>
# endif
# include <string.h>
# include <stdlib.h>
#endif
#ifndef local
# define local static
#endif
/* 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) */
typedef unsigned char uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long ulg;
#if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
# include <limits.h>
# if (ULONG_MAX == 0xffffffffffffffff)
# define Z_U8 unsigned long
# elif (ULLONG_MAX == 0xffffffffffffffff)
# define Z_U8 unsigned long long
# elif (UINT_MAX == 0xffffffffffffffff)
# define Z_U8 unsigned
# endif
#endif
extern z_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[(err) < -6 || (err) > 2 ? 9 : 2 - (err)]
#define ERR_RETURN(strm,err) \
return (strm->msg = ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */
/* common constants */
#ifndef DEF_WBITS
# define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
/* default memLevel */
#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES 2
/* The three kinds of block type */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
/* target dependencies */
#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
# define OS_CODE 0x00
# ifndef Z_SOLO
# if defined(__TURBOC__) || defined(__BORLANDC__)
# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
/* Allow compilation with ANSI keywords only enabled */
void _Cdecl farfree( void *block );
void *_Cdecl farmalloc( unsigned long nbytes );
# else
# include <alloc.h>
# endif
# else /* MSC or DJGPP */
# include <malloc.h>
# endif
# endif
#endif
#ifdef AMIGA
# define OS_CODE 1
#endif
#if defined(VAXC) || defined(VMS)
# define OS_CODE 2
# define F_OPEN(name, mode) \
fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif
#ifdef __370__
# if __TARGET_LIB__ < 0x20000000
# define OS_CODE 4
# elif __TARGET_LIB__ < 0x40000000
# define OS_CODE 11
# else
# define OS_CODE 8
# endif
#endif
#if defined(ATARI) || defined(atarist)
# define OS_CODE 5
#endif
#ifdef OS2
# define OS_CODE 6
# if defined(M_I86) && !defined(Z_SOLO)
# include <malloc.h>
# endif
#endif
#if defined(MACOS)# define OS_CODE 7
#endif
#ifdef __acorn
# define OS_CODE 13
#endif
#if defined(WIN32) && !defined(__CYGWIN__)
# define OS_CODE 10
#endif
#ifdef _BEOS_
# define OS_CODE 16
#endif
#ifdef __TOS_OS400__
# define OS_CODE 18
#endif
#ifdef __APPLE__
# define OS_CODE 19
#endif
#if defined(__BORLANDC__) && !defined(MSDOS)
#pragma warn -8004
#pragma warn -8008
#pragma warn -8066
#endif
/* provide prototypes for these when building zlib without LFS */
#if !defined(_WIN32) && \
(!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off_t);
ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off_t);
ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off_t);
#endif
/* common defaults */
#ifndef OS_CODE
# define OS_CODE 3 /* assume Unix */
#endif
#ifndef F_OPEN
# define F_OPEN(name, mode) fopen((name), (mode))
#endif
/* functions */
#if defined(pyr) || defined(Z_SOLO)
# define NO_MEMCPY
#endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
/* Use our own functions for small and medium model with MSC <= 5.0.
* You may have to use the same strategy for Borland C (untested).
* The __SC__ check is for Symantec.
*/
# define NO_MEMCPY
#endif
#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
# define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
# define zmemcpy _fmemcpy
# define zmemcmp _fmemcmp
# define zmemzero(dest, len) _fmemset(dest, 0, len)
# else
# define zmemcpy memcpy
# define zmemcmp memcmp# define zmemzero(dest, len) memset(dest, 0, len)
# endif
#else
void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len);
int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len);
void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len);
#endif
/* Diagnostic functions */
#ifdef ZLIB_DEBUG
# include <stdio.h>
extern int ZLIB_INTERNAL z_verbose;
extern void ZLIB_INTERNAL z_error(char *m);
# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) {if (z_verbose>=0) fprintf x ;}
# define Tracev(x) {if (z_verbose>0) fprintf x ;}
# define Tracevv(x) {if (z_verbose>1) fprintf x ;}
# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
#else
# define Assert(cond,msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c,x)
# define Tracecv(c,x)
#endif
#ifndef Z_SOLO
voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items,
unsigned size);
void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr);
#endif
#define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
/* Reverse the bytes in a 32-bit value */
#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
#endif /* ZUTIL_H */