linux/include/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: zutil.h,v 1.1 2004/03/15 20:35:25 as Exp $ */
  12
  13 #ifndef _Z_UTIL_H
  14 #define _Z_UTIL_H
  15
  16 #include "zlib.h"
  17
  18 #include <linux/string.h>
  19 #define HAVE_MEMCPY
  20
  21 #if 0 // #ifdef STDC
  22 #  include <stddef.h>
  23 #  include <string.h>
  24 #  include <stdlib.h>
  25 #endif
  26 #ifndef __KERNEL__
  27 #ifdef NO_ERRNO_H
  28     extern int errno;
  29 #else
  30 #   include <errno.h>
  31 #endif
  32 #endif
  33
  34 #ifndef local
  35 #  define local static
  36 #endif
  37 /* compile with -Dlocal if your debugger can't find static symbols */
  38
  39 typedef unsigned char  uch;
  40 typedef uch FAR uchf;
  41 typedef unsigned short ush;
  42 typedef ush FAR ushf;
  43 typedef unsigned long  ulg;
  44
  45 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
  46 /* (size given to avoid silly warnings with Visual C++) */
  47
  48 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  49
  50 #define ERR_RETURN(strm,err) \
  51   return (strm->msg = ERR_MSG(err), (err))
  52 /* To be used only when the state is known to be valid */
  53
  54         /* common constants */
  55
  56 #ifndef DEF_WBITS
  57 #  define DEF_WBITS MAX_WBITS
  58 #endif
  59 /* default windowBits for decompression. MAX_WBITS is for compression only */
  60
  61 #if MAX_MEM_LEVEL >= 8
  62 #  define DEF_MEM_LEVEL 8
  63 #else
  64 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  65 #endif
  66 /* default memLevel */
  67
  68 #define STORED_BLOCK 0
  69 #define STATIC_TREES 1
  70 #define DYN_TREES    2
  71 /* The three kinds of block type */
  72
  73 #define MIN_MATCH  3
  74 #define MAX_MATCH  258
  75 /* The minimum and maximum match lengths */
  76
  77 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  78
  79         /* target dependencies */
  80
  81 #ifdef MSDOS
  82 #  define OS_CODE  0x00
  83 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  84 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  85        /* Allow compilation with ANSI keywords only enabled */
  86        void _Cdecl farfree( void *block );
  87        void *_Cdecl farmalloc( unsigned long nbytes );
  88 #    else
  89 #     include <alloc.h>
  90 #    endif
  91 #  else /* MSC or DJGPP */
  92 #    include <malloc.h>
  93 #  endif
  94 #endif
  95
  96 #ifdef OS2
  97 #  define OS_CODE  0x06
  98 #endif
  99
 100 #ifdef WIN32 /* Window 95 & Windows NT */
 101 #  define OS_CODE  0x0b
 102 #endif
 103
 104 #if defined(VAXC) || defined(VMS)
 105 #  define OS_CODE  0x02
 106 #  define F_OPEN(name, mode) \
 107      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 108 #endif
 109
 110 #ifdef AMIGA
 111 #  define OS_CODE  0x01
 112 #endif
 113
 114 #if defined(ATARI) || defined(atarist)
 115 #  define OS_CODE  0x05
 116 #endif
 117
 118 #if defined(MACOS) || defined(TARGET_OS_MAC)
 119 #  define OS_CODE  0x07
 120 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 121 #    include <unix.h> /* for fdopen */
 122 #  else
 123 #    ifndef fdopen
 124 #      define fdopen(fd,mode) NULL /* No fdopen() */
 125 #    endif
 126 #  endif
 127 #endif
 128
 129 #ifdef __50SERIES /* Prime/PRIMOS */
 130 #  define OS_CODE  0x0F
 131 #endif
 132
 133 #ifdef TOPS20
 134 #  define OS_CODE  0x0a
 135 #endif
 136
 137 #if defined(_BEOS_) || defined(RISCOS)
 138 #  define fdopen(fd,mode) NULL /* No fdopen() */
 139 #endif
 140
 141 #if (defined(_MSC_VER) && (_MSC_VER > 600))
 142 #  define fdopen(fd,type)  _fdopen(fd,type)
 143 #endif
 144
 145
 146         /* Common defaults */
 147
 148 #ifndef OS_CODE
 149 #  define OS_CODE  0x03  /* assume Unix */
 150 #endif
 151
 152 #ifndef F_OPEN
 153 #  define F_OPEN(name, mode) fopen((name), (mode))
 154 #endif
 155
 156          /* functions */
 157
 158 #ifdef HAVE_STRERROR
 159    extern char *strerror OF((int));
 160 #  define zstrerror(errnum) strerror(errnum)
 161 #else
 162 #  define zstrerror(errnum) ""
 163 #endif
 164
 165 #if defined(pyr)
 166 #  define NO_MEMCPY
 167 #endif
 168 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 169  /* Use our own functions for small and medium model with MSC <= 5.0.
 170   * You may have to use the same strategy for Borland C (untested).
 171   * The __SC__ check is for Symantec.
 172   */
 173 #  define NO_MEMCPY
 174 #endif
 175 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 176 #  define HAVE_MEMCPY
 177 #endif
 178 #ifdef HAVE_MEMCPY
 179 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 180 #    define zmemcpy _fmemcpy
 181 #    define zmemcmp _fmemcmp
 182 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 183 #  else
 184 #    define zmemcpy memcpy
 185 #    define zmemcmp memcmp
 186 #    define zmemzero(dest, len) memset(dest, 0, len)
 187 #  endif
 188 #else
 189    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
 190    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
 191    extern void zmemzero OF((Bytef* dest, uInt len));
 192 #endif
 193
 194 /* Diagnostic functions */
 195 #ifdef DEBUG
 196 #  include <stdio.h>
 197    extern int z_verbose;
 198    extern void z_error    OF((char *m));
 199 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 200 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 201 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 202 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 203 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 204 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 205 #else
 206 #  define Assert(cond,msg)
 207 #  define Trace(x)
 208 #  define Tracev(x)
 209 #  define Tracevv(x)
 210 #  define Tracec(c,x)
 211 #  define Tracecv(c,x)
 212 #endif
 213
 214
 215 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
 216                                        uInt len));
 217 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 218 void   zcfree  OF((voidpf opaque, voidpf ptr));
 219
 220 #define ZALLOC(strm, items, size) \
 221            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 222 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 223 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 224
 225 #endif /* _Z_UTIL_H */