zutil.h

00001 /* zutil.h -- internal interface and configuration of the compression library
00002  * Copyright (C) 1995-2012 Jean-loup Gailly.
00003  * For conditions of distribution and use, see copyright notice in zlib.h
00004  */
00005 
00006 /* WARNING: this file should *not* be used by applications. It is
00007    part of the implementation of the compression library and is
00008    subject to change. Applications should only use zlib.h.
00009  */
00010 
00011 /* @(#) $Id$ */
00012 
00013 #ifndef ZUTIL_H
00014 #define ZUTIL_H
00015 
00016 #ifdef HAVE_HIDDEN
00017 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
00018 #else
00019 #  define ZLIB_INTERNAL
00020 #endif
00021 
00022 #include "zlib.h"
00023 
00024 #if defined(STDC) && !defined(Z_SOLO)
00025 #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
00026 #    include <stddef.h>
00027 #  endif
00028 #  include <string.h>
00029 #  include <stdlib.h>
00030 #endif
00031 
00032 #ifdef Z_SOLO
00033    typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
00034 #endif
00035 
00036 #ifndef local
00037 #  define local static
00038 #endif
00039 /* compile with -Dlocal if your debugger can't find static symbols */
00040 
00041 typedef unsigned char  uch;
00042 typedef uch FAR uchf;
00043 typedef unsigned short ush;
00044 typedef ush FAR ushf;
00045 typedef unsigned long  ulg;
00046 
00047 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
00048 /* (size given to avoid silly warnings with Visual C++) */
00049 
00050 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
00051 
00052 #define ERR_RETURN(strm,err) \
00053   return (strm->msg = (char*)ERR_MSG(err), (err))
00054 /* To be used only when the state is known to be valid */
00055 
00056         /* common constants */
00057 
00058 #ifndef DEF_WBITS
00059 #  define DEF_WBITS MAX_WBITS
00060 #endif
00061 /* default windowBits for decompression. MAX_WBITS is for compression only */
00062 
00063 #if MAX_MEM_LEVEL >= 8
00064 #  define DEF_MEM_LEVEL 8
00065 #else
00066 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
00067 #endif
00068 /* default memLevel */
00069 
00070 #define STORED_BLOCK 0
00071 #define STATIC_TREES 1
00072 #define DYN_TREES    2
00073 /* The three kinds of block type */
00074 
00075 #define MIN_MATCH  3
00076 #define MAX_MATCH  258
00077 /* The minimum and maximum match lengths */
00078 
00079 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
00080 
00081         /* target dependencies */
00082 
00083 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
00084 #  define OS_CODE  0x00
00085 #  ifndef Z_SOLO
00086 #    if defined(__TURBOC__) || defined(__BORLANDC__)
00087 #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
00088          /* Allow compilation with ANSI keywords only enabled */
00089          void _Cdecl farfree( void *block );
00090          void *_Cdecl farmalloc( unsigned long nbytes );
00091 #      else
00092 #        include <alloc.h>
00093 #      endif
00094 #    else /* MSC or DJGPP */
00095 #      include <malloc.h>
00096 #    endif
00097 #  endif
00098 #endif
00099 
00100 #ifdef AMIGA
00101 #  define OS_CODE  0x01
00102 #endif
00103 
00104 #if defined(VAXC) || defined(VMS)
00105 #  define OS_CODE  0x02
00106 #  define F_OPEN(name, mode) \
00107      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
00108 #endif
00109 
00110 #if defined(ATARI) || defined(atarist)
00111 #  define OS_CODE  0x05
00112 #endif
00113 
00114 #ifdef OS2
00115 #  define OS_CODE  0x06
00116 #  if defined(M_I86) && !defined(Z_SOLO)
00117 #    include <malloc.h>
00118 #  endif
00119 #endif
00120 
00121 #if defined(MACOS) || defined(TARGET_OS_MAC)
00122 #  define OS_CODE  0x07
00123 #  ifndef Z_SOLO
00124 #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
00125 #      include <unix.h> /* for fdopen */
00126 #    else
00127 #      ifndef fdopen
00128 #        define fdopen(fd,mode) NULL /* No fdopen() */
00129 #      endif
00130 #    endif
00131 #  endif
00132 #endif
00133 
00134 #ifdef TOPS20
00135 #  define OS_CODE  0x0a
00136 #endif
00137 
00138 #ifdef WIN32
00139 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
00140 #    define OS_CODE  0x0b
00141 #  endif
00142 #endif
00143 
00144 #ifdef __50SERIES /* Prime/PRIMOS */
00145 #  define OS_CODE  0x0f
00146 #endif
00147 
00148 #if defined(_BEOS_) || defined(RISCOS)
00149 #  define fdopen(fd,mode) NULL /* No fdopen() */
00150 #endif
00151 
00152 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
00153 #  if defined(_WIN32_WCE)
00154 #    define fdopen(fd,mode) NULL /* No fdopen() */
00155 #    ifndef _PTRDIFF_T_DEFINED
00156        typedef int ptrdiff_t;
00157 #      define _PTRDIFF_T_DEFINED
00158 #    endif
00159 #  else
00160 #    define fdopen(fd,type)  _fdopen(fd,type)
00161 #  endif
00162 #endif
00163 
00164 #if defined(__BORLANDC__) && !defined(MSDOS)
00165   #pragma warn -8004
00166   #pragma warn -8008
00167   #pragma warn -8066
00168 #endif
00169 
00170 /* provide prototypes for these when building zlib without LFS */
00171 #if !defined(_WIN32) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
00172     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
00173     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
00174 #endif
00175 
00176         /* common defaults */
00177 
00178 #ifndef OS_CODE
00179 #  define OS_CODE  0x03  /* assume Unix */
00180 #endif
00181 
00182 #ifndef F_OPEN
00183 #  define F_OPEN(name, mode) fopen((name), (mode))
00184 #endif
00185 
00186          /* functions */
00187 
00188 #if defined(pyr) || defined(Z_SOLO)
00189 #  define NO_MEMCPY
00190 #endif
00191 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
00192  /* Use our own functions for small and medium model with MSC <= 5.0.
00193   * You may have to use the same strategy for Borland C (untested).
00194   * The __SC__ check is for Symantec.
00195   */
00196 #  define NO_MEMCPY
00197 #endif
00198 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
00199 #  define HAVE_MEMCPY
00200 #endif
00201 #ifdef HAVE_MEMCPY
00202 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
00203 #    define zmemcpy _fmemcpy
00204 #    define zmemcmp _fmemcmp
00205 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
00206 #  else
00207 #    define zmemcpy memcpy
00208 #    define zmemcmp memcmp
00209 #    define zmemzero(dest, len) memset(dest, 0, len)
00210 #  endif
00211 #else
00212    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
00213    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
00214    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
00215 #endif
00216 
00217 /* Diagnostic functions */
00218 #ifdef DEBUG
00219 #  include <stdio.h>
00220    extern int ZLIB_INTERNAL z_verbose;
00221    extern void ZLIB_INTERNAL z_error OF((char *m));
00222 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
00223 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
00224 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
00225 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
00226 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
00227 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
00228 #else
00229 #  define Assert(cond,msg)
00230 #  define Trace(x)
00231 #  define Tracev(x)
00232 #  define Tracevv(x)
00233 #  define Tracec(c,x)
00234 #  define Tracecv(c,x)
00235 #endif
00236 
00237 #ifndef Z_SOLO
00238    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
00239                                     unsigned size));
00240    void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
00241 #endif
00242 
00243 #define ZALLOC(strm, items, size) \
00244            (*((strm)->zalloc))((strm)->opaque, (items), (size))
00245 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
00246 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
00247 
00248 /* Reverse the bytes in a 32-bit value */
00249 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
00250                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
00251 
00252 #endif /* ZUTIL_H */