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Rev | Author | Line No. | Line |
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107 | pj | 1 | /* zutil.h -- internal interface and configuration of the compression library |
2 | * Copyright (C) 1995-2002 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 | |||
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 | |||
119 | giacomo | 11 | /* @(#) $Id: zutil.h,v 1.2 2003-03-31 11:39:28 giacomo Exp $ */ |
107 | pj | 12 | |
13 | #ifndef _Z_UTIL_H |
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14 | #define _Z_UTIL_H |
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15 | |||
16 | #include "zlib.h" |
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17 | |||
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 | |||
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 | |||
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 | |||
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 | |||
43 | #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] |
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44 | |||
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 | |||
49 | /* common constants */ |
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50 | |||
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 | |||
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 | |||
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 | |||
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 | |||
72 | #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ |
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73 | |||
74 | /* target dependencies */ |
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75 | |||
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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119 | giacomo | 87 | |
107 | pj | 88 | # endif |
89 | #endif |
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90 | |||
91 | #ifdef OS2 |
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92 | # define OS_CODE 0x06 |
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93 | #endif |
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94 | |||
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 | |||
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 | |||
105 | #ifdef AMIGA |
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106 | # define OS_CODE 0x01 |
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107 | #endif |
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108 | |||
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 | |||
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 | |||
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 | |||
128 | #ifdef TOPS20 |
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129 | # define OS_CODE 0x0a |
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130 | #endif |
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131 | |||
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 | |||
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 | |||
140 | |||
141 | /* Common defaults */ |
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142 | |||
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 | |||
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 | |||
151 | /* functions */ |
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152 | |||
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 | |||
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 | |||
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(stderr,x) {if (z_verbose>=0) cprintf x ;} |
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196 | # define Tracev(stderr,x) {if (z_verbose>0) cprintf x ;} |
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197 | # define Tracevv(stderr,x) {if (z_verbose>1) cprintf x ;} |
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198 | # define Tracec(c,(stderr,x)) {if (z_verbose>0 && (c)) cprintf (x) ;} |
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199 | # define Tracecv(c,(stderr,x)) {if (z_verbose>1 && (c)) cprintf (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 | |||
209 | |||
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 | |||
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 | |||
220 | #endif /* _Z_UTIL_H */ |