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Add zlib LICENSE file to zlib subdir
author Michael Pavone <pavone@retrodev.com>
date Sun, 15 Jun 2025 15:41:38 -0700
parents 9ef72ee5c0b0
children
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1 /* zutil.h -- internal interface and configuration of the compression library
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2 * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
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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 ZUTIL_H
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14 #define ZUTIL_H
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15
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16 #ifdef HAVE_HIDDEN
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17 # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
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18 #else
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19 # define ZLIB_INTERNAL
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20 #endif
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21
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22 #include "zlib.h"
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23
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24 #if defined(STDC) && !defined(Z_SOLO)
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25 # if !(defined(_WIN32_WCE) && defined(_MSC_VER))
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26 # include <stddef.h>
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27 # endif
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28 # include <string.h>
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29 # include <stdlib.h>
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30 #endif
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31
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32 #ifndef local
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33 # define local static
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34 #endif
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35 /* since "static" is used to mean two completely different things in C, we
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36 define "local" for the non-static meaning of "static", for readability
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37 (compile with -Dlocal if your debugger can't find static symbols) */
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38
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39 typedef unsigned char uch;
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40 typedef uch FAR uchf;
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41 typedef unsigned short ush;
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42 typedef ush FAR ushf;
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43 typedef unsigned long ulg;
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44
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45 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
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46 # include <limits.h>
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47 # if (ULONG_MAX == 0xffffffffffffffff)
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48 # define Z_U8 unsigned long
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49 # elif (ULLONG_MAX == 0xffffffffffffffff)
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50 # define Z_U8 unsigned long long
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51 # elif (UINT_MAX == 0xffffffffffffffff)
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52 # define Z_U8 unsigned
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53 # endif
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54 #endif
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55
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56 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
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57 /* (size given to avoid silly warnings with Visual C++) */
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58
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59 #define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)]
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60
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61 #define ERR_RETURN(strm,err) \
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62 return (strm->msg = ERR_MSG(err), (err))
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63 /* To be used only when the state is known to be valid */
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64
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65 /* common constants */
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66
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67 #ifndef DEF_WBITS
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68 # define DEF_WBITS MAX_WBITS
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69 #endif
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70 /* default windowBits for decompression. MAX_WBITS is for compression only */
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71
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72 #if MAX_MEM_LEVEL >= 8
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73 # define DEF_MEM_LEVEL 8
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74 #else
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75 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
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76 #endif
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77 /* default memLevel */
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78
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79 #define STORED_BLOCK 0
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80 #define STATIC_TREES 1
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81 #define DYN_TREES 2
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82 /* The three kinds of block type */
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83
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84 #define MIN_MATCH 3
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85 #define MAX_MATCH 258
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86 /* The minimum and maximum match lengths */
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87
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88 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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89
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90 /* target dependencies */
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91
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92 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
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93 # define OS_CODE 0x00
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94 # ifndef Z_SOLO
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95 # if defined(__TURBOC__) || defined(__BORLANDC__)
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96 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
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97 /* Allow compilation with ANSI keywords only enabled */
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98 void _Cdecl farfree( void *block );
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99 void *_Cdecl farmalloc( unsigned long nbytes );
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100 # else
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101 # include <alloc.h>
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102 # endif
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103 # else /* MSC or DJGPP */
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104 # include <malloc.h>
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105 # endif
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106 # endif
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107 #endif
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108
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109 #ifdef AMIGA
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110 # define OS_CODE 1
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111 #endif
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112
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113 #if defined(VAXC) || defined(VMS)
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114 # define OS_CODE 2
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115 # define F_OPEN(name, mode) \
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116 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
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117 #endif
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118
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119 #ifdef __370__
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120 # if __TARGET_LIB__ < 0x20000000
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121 # define OS_CODE 4
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122 # elif __TARGET_LIB__ < 0x40000000
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123 # define OS_CODE 11
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124 # else
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125 # define OS_CODE 8
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126 # endif
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127 #endif
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128
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129 #if defined(ATARI) || defined(atarist)
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130 # define OS_CODE 5
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131 #endif
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132
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133 #ifdef OS2
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134 # define OS_CODE 6
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135 # if defined(M_I86) && !defined(Z_SOLO)
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136 # include <malloc.h>
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137 # endif
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138 #endif
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139
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140 #if defined(MACOS)
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141 # define OS_CODE 7
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142 #endif
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143
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144 #ifdef __acorn
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145 # define OS_CODE 13
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146 #endif
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147
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148 #if defined(WIN32) && !defined(__CYGWIN__)
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149 # define OS_CODE 10
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150 #endif
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151
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152 #ifdef _BEOS_
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153 # define OS_CODE 16
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154 #endif
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155
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156 #ifdef __TOS_OS400__
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157 # define OS_CODE 18
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158 #endif
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159
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160 #ifdef __APPLE__
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161 # define OS_CODE 19
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162 #endif
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163
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164 #if defined(__BORLANDC__) && !defined(MSDOS)
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165 #pragma warn -8004
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166 #pragma warn -8008
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167 #pragma warn -8066
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168 #endif
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169
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170 /* provide prototypes for these when building zlib without LFS */
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171 #if !defined(_WIN32) && \
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172 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
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173 ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off_t);
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174 ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off_t);
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175 ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off_t);
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176 #endif
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177
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178 /* common defaults */
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179
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180 #ifndef OS_CODE
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181 # define OS_CODE 3 /* assume Unix */
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182 #endif
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183
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184 #ifndef F_OPEN
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185 # define F_OPEN(name, mode) fopen((name), (mode))
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186 #endif
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187
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188 /* functions */
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189
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190 #if defined(pyr) || defined(Z_SOLO)
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191 # define NO_MEMCPY
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192 #endif
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193 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
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194 /* Use our own functions for small and medium model with MSC <= 5.0.
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195 * You may have to use the same strategy for Borland C (untested).
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196 * The __SC__ check is for Symantec.
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197 */
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198 # define NO_MEMCPY
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199 #endif
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200 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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201 # define HAVE_MEMCPY
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202 #endif
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203 #ifdef HAVE_MEMCPY
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204 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
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205 # define zmemcpy _fmemcpy
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206 # define zmemcmp _fmemcmp
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207 # define zmemzero(dest, len) _fmemset(dest, 0, len)
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208 # else
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209 # define zmemcpy memcpy
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210 # define zmemcmp memcmp
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211 # define zmemzero(dest, len) memset(dest, 0, len)
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212 # endif
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213 #else
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214 void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len);
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215 int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len);
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216 void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len);
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217 #endif
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218
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219 /* Diagnostic functions */
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220 #ifdef ZLIB_DEBUG
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221 # include <stdio.h>
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222 extern int ZLIB_INTERNAL z_verbose;
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223 extern void ZLIB_INTERNAL z_error(char *m);
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224 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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225 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
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226 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
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227 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
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228 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
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229 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
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230 #else
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231 # define Assert(cond,msg)
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232 # define Trace(x)
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233 # define Tracev(x)
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234 # define Tracevv(x)
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235 # define Tracec(c,x)
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236 # define Tracecv(c,x)
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237 #endif
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238
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239 #ifndef Z_SOLO
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240 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items,
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241 unsigned size);
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242 void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr);
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243 #endif
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244
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245 #define ZALLOC(strm, items, size) \
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246 (*((strm)->zalloc))((strm)->opaque, (items), (size))
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247 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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248 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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249
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250 /* Reverse the bytes in a 32-bit value */
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251 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
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252 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
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253
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254 #endif /* ZUTIL_H */