zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2002 Jean-loup Gailly.
   3  * For conditions of distribution and use, see copyright notice in zlib.h
   4  */
   5
   6 /* WARNING: this file should *not* be used by applications. It is
   7    part of the implementation of the compression library and is
   8    subject to change. Applications should only use zlib.h.
   9  */
  10
  11 /* @(#) $Id$ */
  12
  13 #ifndef _Z_UTIL_H
  14 #define _Z_UTIL_H
  15
  16 #include "../rsync.h"
  17 #include "zlib.h"
  18
  19 #if 0
  20 #ifdef STDC
  21 #  include <stddef.h>
  22 #  include <string.h>
  23 #  include <stdlib.h>
  24 #endif
  25 #ifdef NO_ERRNO_H
  26     extern int errno;
  27 #else
  28 #   include <errno.h>
  29 #endif
  30 #endif
  31
  32 #ifndef local
  33 #  define local static
  34 #endif
  35 /* compile with -Dlocal if your debugger can't find static symbols */
  36
  37 typedef unsigned char  uch;
  38 typedef uch FAR uchf;
  39 typedef unsigned short ush;
  40 typedef ush FAR ushf;
  41 typedef unsigned long  ulg;
  42
  43 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
  44 /* (size given to avoid silly warnings with Visual C++) */
  45
  46 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  47
  48 #define ERR_RETURN(strm,err) \
  49   return (strm->msg = (char*)ERR_MSG(err), (err))
  50 /* To be used only when the state is known to be valid */
  51
  52         /* common constants */
  53
  54 #ifndef DEF_WBITS
  55 #  define DEF_WBITS MAX_WBITS
  56 #endif
  57 /* default windowBits for decompression. MAX_WBITS is for compression only */
  58
  59 #if MAX_MEM_LEVEL >= 8
  60 #  define DEF_MEM_LEVEL 8
  61 #else
  62 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  63 #endif
  64 /* default memLevel */
  65
  66 #define STORED_BLOCK 0
  67 #define STATIC_TREES 1
  68 #define DYN_TREES    2
  69 /* The three kinds of block type */
  70
  71 #define MIN_MATCH  3
  72 #define MAX_MATCH  258
  73 /* The minimum and maximum match lengths */
  74
  75 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  76
  77         /* target dependencies */
  78
  79 #ifdef MSDOS
  80 #  define OS_CODE  0x00
  81 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  82 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  83        /* Allow compilation with ANSI keywords only enabled */
  84        void _Cdecl farfree( void *block );
  85        void *_Cdecl farmalloc( unsigned long nbytes );
  86 #    else
  87 #     include <alloc.h>
  88 #    endif
  89 #  else /* MSC or DJGPP */
  90 #    include <malloc.h>
  91 #  endif
  92 #endif
  93
  94 #ifdef OS2
  95 #  define OS_CODE  0x06
  96 #endif
  97
  98 #ifdef WIN32 /* Window 95 & Windows NT */
  99 #  define OS_CODE  0x0b
 100 #endif
 101
 102 #if defined(VAXC) || defined(VMS)
 103 #  define OS_CODE  0x02
 104 #  define F_OPEN(name, mode) \
 105      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 106 #endif
 107
 108 #ifdef AMIGA
 109 #  define OS_CODE  0x01
 110 #endif
 111
 112 #if defined(ATARI) || defined(atarist)
 113 #  define OS_CODE  0x05
 114 #endif
 115
 116 #if defined(MACOS) || defined(TARGET_OS_MAC)
 117 #  define OS_CODE  0x07
 118 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 119 #    include <unix.h> /* for fdopen */
 120 #  else
 121 #    ifndef fdopen
 122 #      define fdopen(fd,mode) NULL /* No fdopen() */
 123 #    endif
 124 #  endif
 125 #endif
 126
 127 #ifdef __50SERIES /* Prime/PRIMOS */
 128 #  define OS_CODE  0x0F
 129 #endif
 130
 131 #ifdef TOPS20
 132 #  define OS_CODE  0x0a
 133 #endif
 134
 135 #if defined(_BEOS_) || defined(RISCOS)
 136 #  define fdopen(fd,mode) NULL /* No fdopen() */
 137 #endif
 138
 139 #if (defined(_MSC_VER) && (_MSC_VER > 600))
 140 #  define fdopen(fd,type)  _fdopen(fd,type)
 141 #endif
 142
 143
 144         /* Common defaults */
 145
 146 #ifndef OS_CODE
 147 #  define OS_CODE  0x03  /* assume Unix */
 148 #endif
 149
 150 #ifndef F_OPEN
 151 #  define F_OPEN(name, mode) fopen((name), (mode))
 152 #endif
 153
 154          /* functions */
 155
 156 #ifdef HAVE_STRERROR
 157    extern char *strerror OF((int));
 158 #  define zstrerror(errnum) strerror(errnum)
 159 #else
 160 #  define zstrerror(errnum) ""
 161 #endif
 162
 163 #if defined(pyr)
 164 #  define NO_MEMCPY
 165 #endif
 166 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 167  /* Use our own functions for small and medium model with MSC <= 5.0.
 168   * You may have to use the same strategy for Borland C (untested).
 169   * The __SC__ check is for Symantec.
 170   */
 171 #  define NO_MEMCPY
 172 #endif
 173 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 174 #  define HAVE_MEMCPY
 175 #endif
 176 #ifdef HAVE_MEMCPY
 177 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 178 #    define zmemcpy _fmemcpy
 179 #    define zmemcmp _fmemcmp
 180 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 181 #  else
 182 #    define zmemcpy memcpy
 183 #    define zmemcmp memcmp
 184 #    define zmemzero(dest, len) memset(dest, 0, len)
 185 #  endif
 186 #else
 187    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
 188    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
 189    extern void zmemzero OF((Bytef* dest, uInt len));
 190 #endif
 191
 192 /* Diagnostic functions */
 193 #ifdef DEBUG
 194 #  include <stdio.h>
 195    extern int z_verbose;
 196    extern void z_error    OF((char *m));
 197 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 198 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 199 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 200 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 201 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 202 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 203 #else
 204 #  define Assert(cond,msg)
 205 #  define Trace(x)
 206 #  define Tracev(x)
 207 #  define Tracevv(x)
 208 #  define Tracec(c,x)
 209 #  define Tracecv(c,x)
 210 #endif
 211
 212
 213 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
 214                                        uInt len));
 215 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 216 void   zcfree  OF((voidpf opaque, voidpf ptr));
 217
 218 #define ZALLOC(strm, items, size) \
 219            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 220 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 221 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 222
 223 #endif /* _Z_UTIL_H */