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1 /* zutil.h -- internal interface and configuration of the compression library
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2 * Copyright (C) 1995-1998 Jean-loup Gailly.
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3 * For conditions of distribution and use, see copyright notice in zlib.h
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4 */
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5
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6 /* WARNING: this file should *not* be used by applications. It is
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7 part of the implementation of the compression library and is
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8 subject to change. Applications should only use zlib.h.
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9 */
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10
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11 /* @(#) $Id$ */
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12
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13 #ifndef _Z_UTIL_H
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14 #define _Z_UTIL_H
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15
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16 #include "zlib.h"
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17
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18 #ifdef STDC
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19 # include <stddef.h>
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20 # include <string.h>
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21 # include <stdlib.h>
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22 #endif
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23 #ifdef NO_ERRNO_H
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24 extern int errno;
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25 #else
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26 # include <errno.h>
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27 #endif
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28
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29 #ifndef local
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30 # define local static
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31 #endif
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32 /* compile with -Dlocal if your debugger can't find static symbols */
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33
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34 typedef unsigned char uch;
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35 typedef uch FAR uchf;
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36 typedef unsigned short ush;
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37 typedef ush FAR ushf;
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38 typedef unsigned long ulg;
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39
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40 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
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41 /* (size given to avoid silly warnings with Visual C++) */
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42
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43 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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44
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45 #define ERR_RETURN(strm,err) \
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46 return (strm->msg = (char*)ERR_MSG(err), (err))
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47 /* To be used only when the state is known to be valid */
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48
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49 /* common constants */
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50
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51 #ifndef DEF_WBITS
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52 # define DEF_WBITS MAX_WBITS
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53 #endif
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54 /* default windowBits for decompression. MAX_WBITS is for compression only */
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55
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56 #if MAX_MEM_LEVEL >= 8
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57 # define DEF_MEM_LEVEL 8
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58 #else
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59 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
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60 #endif
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61 /* default memLevel */
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62
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63 #define STORED_BLOCK 0
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64 #define STATIC_TREES 1
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65 #define DYN_TREES 2
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66 /* The three kinds of block type */
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67
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68 #define MIN_MATCH 3
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69 #define MAX_MATCH 258
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70 /* The minimum and maximum match lengths */
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71
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72 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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73
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74 /* target dependencies */
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75
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76 #ifdef MSDOS
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77 # define OS_CODE 0x00
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78 # if defined(__TURBOC__) || defined(__BORLANDC__)
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79 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
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80 /* Allow compilation with ANSI keywords only enabled */
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81 void _Cdecl farfree( void *block );
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82 void *_Cdecl farmalloc( unsigned long nbytes );
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83 # else
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84 # include <alloc.h>
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85 # endif
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86 # else /* MSC or DJGPP */
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87 # include <malloc.h>
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88 # endif
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89 #endif
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90
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91 #ifdef OS2
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92 # define OS_CODE 0x06
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93 #endif
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94
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95 #ifdef WIN32 /* Window 95 & Windows NT */
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96 # define OS_CODE 0x0b
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97 #endif
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98
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99 #if defined(VAXC) || defined(VMS)
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100 # define OS_CODE 0x02
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101 # define F_OPEN(name, mode) \
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102 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
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103 #endif
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104
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105 #ifdef AMIGA
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106 # define OS_CODE 0x01
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107 #endif
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108
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109 #if defined(ATARI) || defined(atarist)
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110 # define OS_CODE 0x05
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111 #endif
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112
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113 #if defined(MACOS) || defined(TARGET_OS_MAC)
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114 # define OS_CODE 0x07
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115 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
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116 # include <unix.h> /* for fdopen */
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117 # else
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118 # ifndef fdopen
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119 # define fdopen(fd,mode) NULL /* No fdopen() */
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120 # endif
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121 # endif
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122 #endif
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123
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124 #ifdef __50SERIES /* Prime/PRIMOS */
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125 # define OS_CODE 0x0F
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126 #endif
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127
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128 #ifdef TOPS20
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129 # define OS_CODE 0x0a
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130 #endif
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131
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132 #if defined(_BEOS_) || defined(RISCOS)
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133 # define fdopen(fd,mode) NULL /* No fdopen() */
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134 #endif
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135
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136 #if (defined(_MSC_VER) && (_MSC_VER > 600))
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137 # define fdopen(fd,type) _fdopen(fd,type)
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138 #endif
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139
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140
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141 /* Common defaults */
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142
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143 #ifndef OS_CODE
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144 # define OS_CODE 0x03 /* assume Unix */
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145 #endif
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146
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147 #ifndef F_OPEN
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148 # define F_OPEN(name, mode) fopen((name), (mode))
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149 #endif
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150
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151 /* functions */
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152
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153 #ifdef HAVE_STRERROR
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154 extern char *strerror OF((int));
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155 # define zstrerror(errnum) strerror(errnum)
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156 #else
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157 # define zstrerror(errnum) ""
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158 #endif
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159
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160 #if defined(pyr)
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161 # define NO_MEMCPY
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162 #endif
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163 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
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164 /* Use our own functions for small and medium model with MSC <= 5.0.
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165 * You may have to use the same strategy for Borland C (untested).
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166 * The __SC__ check is for Symantec.
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167 */
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168 # define NO_MEMCPY
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169 #endif
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170 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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171 # define HAVE_MEMCPY
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172 #endif
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173 #ifdef HAVE_MEMCPY
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174 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
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175 # define zmemcpy _fmemcpy
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176 # define zmemcmp _fmemcmp
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177 # define zmemzero(dest, len) _fmemset(dest, 0, len)
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178 # else
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179 # define zmemcpy memcpy
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180 # define zmemcmp memcmp
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181 # define zmemzero(dest, len) memset(dest, 0, len)
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182 # endif
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183 #else
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184 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
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185 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
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186 extern void zmemzero OF((Bytef* dest, uInt len));
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187 #endif
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188
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189 /* Diagnostic functions */
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190 #ifdef DEBUG
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191 # include <stdio.h>
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192 extern int z_verbose;
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193 extern void z_error OF((char *m));
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194 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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195 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
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196 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
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197 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
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198 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
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199 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
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200 #else
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201 # define Assert(cond,msg)
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202 # define Trace(x)
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203 # define Tracev(x)
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204 # define Tracevv(x)
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205 # define Tracec(c,x)
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206 # define Tracecv(c,x)
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207 #endif
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208
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209
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210 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
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211 uInt len));
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212 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
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213 void zcfree OF((voidpf opaque, voidpf ptr));
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214
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215 #define ZALLOC(strm, items, size) \
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216 (*((strm)->zalloc))((strm)->opaque, (items), (size))
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217 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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218 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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219
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220 #endif /* _Z_UTIL_H */
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