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annotate zlib/zutil.h @ 1971:80920c21bb52

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Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
author Michael Pavone <pavone@retrodev.com>
date Fri, 08 May 2020 11:40:30 -0700
parents 00d788dac91a
children
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1 /* zutil.h -- internal interface and configuration of the compression library
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2 * Copyright (C) 1995-2016 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 #ifdef Z_SOLO
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33 typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
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34 #endif
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35
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36 #ifndef local
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37 # define local static
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38 #endif
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39 /* since "static" is used to mean two completely different things in C, we
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40 define "local" for the non-static meaning of "static", for readability
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41 (compile with -Dlocal if your debugger can't find static symbols) */
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42
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43 typedef unsigned char uch;
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44 typedef uch FAR uchf;
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45 typedef unsigned short ush;
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46 typedef ush FAR ushf;
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47 typedef unsigned long ulg;
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48
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49 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
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50 /* (size given to avoid silly warnings with Visual C++) */
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51
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52 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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53
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54 #define ERR_RETURN(strm,err) \
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55 return (strm->msg = ERR_MSG(err), (err))
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56 /* To be used only when the state is known to be valid */
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57
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58 /* common constants */
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59
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60 #ifndef DEF_WBITS
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61 # define DEF_WBITS MAX_WBITS
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62 #endif
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63 /* default windowBits for decompression. MAX_WBITS is for compression only */
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64
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65 #if MAX_MEM_LEVEL >= 8
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66 # define DEF_MEM_LEVEL 8
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67 #else
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68 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
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69 #endif
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70 /* default memLevel */
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71
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72 #define STORED_BLOCK 0
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73 #define STATIC_TREES 1
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74 #define DYN_TREES 2
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75 /* The three kinds of block type */
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76
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77 #define MIN_MATCH 3
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78 #define MAX_MATCH 258
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79 /* The minimum and maximum match lengths */
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80
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81 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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82
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83 /* target dependencies */
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84
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85 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
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86 # define OS_CODE 0x00
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87 # ifndef Z_SOLO
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88 # if defined(__TURBOC__) || defined(__BORLANDC__)
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89 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
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90 /* Allow compilation with ANSI keywords only enabled */
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91 void _Cdecl farfree( void *block );
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92 void *_Cdecl farmalloc( unsigned long nbytes );
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93 # else
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94 # include <alloc.h>
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95 # endif
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96 # else /* MSC or DJGPP */
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97 # include <malloc.h>
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98 # endif
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99 # endif
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100 #endif
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101
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102 #ifdef AMIGA
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103 # define OS_CODE 1
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104 #endif
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105
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106 #if defined(VAXC) || defined(VMS)
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107 # define OS_CODE 2
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108 # define F_OPEN(name, mode) \
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109 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
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110 #endif
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111
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112 #ifdef __370__
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113 # if __TARGET_LIB__ < 0x20000000
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114 # define OS_CODE 4
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115 # elif __TARGET_LIB__ < 0x40000000
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116 # define OS_CODE 11
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117 # else
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118 # define OS_CODE 8
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119 # endif
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120 #endif
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121
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122 #if defined(ATARI) || defined(atarist)
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123 # define OS_CODE 5
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124 #endif
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125
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126 #ifdef OS2
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127 # define OS_CODE 6
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128 # if defined(M_I86) && !defined(Z_SOLO)
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129 # include <malloc.h>
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130 # endif
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131 #endif
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132
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133 #if defined(MACOS) || defined(TARGET_OS_MAC)
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134 # define OS_CODE 7
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135 # ifndef Z_SOLO
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136 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
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137 # include <unix.h> /* for fdopen */
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138 # else
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139 # ifndef fdopen
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140 # define fdopen(fd,mode) NULL /* No fdopen() */
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141 # endif
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142 # endif
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143 # endif
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144 #endif
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145
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146 #ifdef __acorn
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147 # define OS_CODE 13
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148 #endif
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149
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150 #if defined(WIN32) && !defined(__CYGWIN__)
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151 # define OS_CODE 10
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152 #endif
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153
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154 #ifdef _BEOS_
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155 # define OS_CODE 16
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156 #endif
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157
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158 #ifdef __TOS_OS400__
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159 # define OS_CODE 18
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160 #endif
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161
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162 #ifdef __APPLE__
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163 # define OS_CODE 19
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164 #endif
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165
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166 #if defined(_BEOS_) || defined(RISCOS)
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167 # define fdopen(fd,mode) NULL /* No fdopen() */
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168 #endif
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169
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170 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
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171 # if defined(_WIN32_WCE)
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172 # define fdopen(fd,mode) NULL /* No fdopen() */
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173 # ifndef _PTRDIFF_T_DEFINED
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174 typedef int ptrdiff_t;
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175 # define _PTRDIFF_T_DEFINED
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176 # endif
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177 # else
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178 # define fdopen(fd,type) _fdopen(fd,type)
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179 # endif
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180 #endif
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181
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182 #if defined(__BORLANDC__) && !defined(MSDOS)
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183 #pragma warn -8004
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184 #pragma warn -8008
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185 #pragma warn -8066
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186 #endif
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187
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188 /* provide prototypes for these when building zlib without LFS */
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189 #if !defined(_WIN32) && \
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190 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
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191 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
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192 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
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193 #endif
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194
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195 /* common defaults */
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196
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197 #ifndef OS_CODE
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198 # define OS_CODE 3 /* assume Unix */
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199 #endif
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200
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201 #ifndef F_OPEN
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202 # define F_OPEN(name, mode) fopen((name), (mode))
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203 #endif
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204
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205 /* functions */
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206
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207 #if defined(pyr) || defined(Z_SOLO)
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208 # define NO_MEMCPY
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209 #endif
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210 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
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211 /* Use our own functions for small and medium model with MSC <= 5.0.
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212 * You may have to use the same strategy for Borland C (untested).
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213 * The __SC__ check is for Symantec.
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214 */
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215 # define NO_MEMCPY
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216 #endif
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217 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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218 # define HAVE_MEMCPY
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219 #endif
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220 #ifdef HAVE_MEMCPY
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221 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
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222 # define zmemcpy _fmemcpy
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223 # define zmemcmp _fmemcmp
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224 # define zmemzero(dest, len) _fmemset(dest, 0, len)
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225 # else
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226 # define zmemcpy memcpy
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227 # define zmemcmp memcmp
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228 # define zmemzero(dest, len) memset(dest, 0, len)
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229 # endif
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230 #else
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231 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
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232 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
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233 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
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234 #endif
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235
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236 /* Diagnostic functions */
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237 #ifdef ZLIB_DEBUG
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238 # include <stdio.h>
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239 extern int ZLIB_INTERNAL z_verbose;
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240 extern void ZLIB_INTERNAL z_error OF((char *m));
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241 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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242 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
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243 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
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244 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
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245 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
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246 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
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247 #else
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248 # define Assert(cond,msg)
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249 # define Trace(x)
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250 # define Tracev(x)
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251 # define Tracevv(x)
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252 # define Tracec(c,x)
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253 # define Tracecv(c,x)
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254 #endif
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255
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256 #ifndef Z_SOLO
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257 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
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258 unsigned size));
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259 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
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260 #endif
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261
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262 #define ZALLOC(strm, items, size) \
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263 (*((strm)->zalloc))((strm)->opaque, (items), (size))
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264 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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265 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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266
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267 /* Reverse the bytes in a 32-bit value */
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268 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
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269 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
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270
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271 #endif /* ZUTIL_H */