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10
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1 /* zutil.h -- internal interface and configuration of the compression library
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2 * Copyright (C) 1995 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: zutil.h,v 1.1.1.1 1997/12/06 04:37:18 darius Exp $ */
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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 #if defined(MSDOS) || defined(VMS)
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19 # include <stddef.h>
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20 # include <errno.h>
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21 #else
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22 extern int errno;
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23 #endif
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24 #ifdef STDC
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25 # include <string.h>
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26 #endif
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27
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28 #ifndef local
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29 # define local static
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30 #endif
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31 /* compile with -Dlocal if your debugger can't find static symbols */
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32
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33 typedef unsigned char uch;
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34 typedef uch FAR uchf;
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35 typedef unsigned short ush;
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36 typedef ush FAR ushf;
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37 typedef unsigned long ulg;
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38
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39 extern char *z_errmsg[]; /* indexed by 1-zlib_error */
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40
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41 #define ERR_RETURN(strm,err) return (strm->msg=z_errmsg[1-err], err)
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42 /* To be used only when the state is known to be valid */
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43
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44 /* common constants */
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45
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46 #define DEFLATED 8
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47
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48 #ifndef DEF_WBITS
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49 # define DEF_WBITS MAX_WBITS
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50 #endif
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51 /* default windowBits for decompression. MAX_WBITS is for compression only */
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52
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53 #if MAX_MEM_LEVEL >= 8
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54 # define DEF_MEM_LEVEL 8
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55 #else
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56 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
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57 #endif
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58 /* default memLevel */
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59
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60 #define STORED_BLOCK 0
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61 #define STATIC_TREES 1
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62 #define DYN_TREES 2
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63 /* The three kinds of block type */
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64
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65 #define MIN_MATCH 3
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66 #define MAX_MATCH 258
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67 /* The minimum and maximum match lengths */
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68
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69 /* target dependencies */
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70
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71 #ifdef MSDOS
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72 # define OS_CODE 0x00
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73 # ifdef __TURBOC__
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74 # include <alloc.h>
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75 # else /* MSC or DJGPP */
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76 # include <malloc.h>
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77 # endif
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78 #endif
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79
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80 #ifdef OS2
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81 # define OS_CODE 0x06
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82 #endif
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83
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84 #ifdef WIN32 /* Windows NT */
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85 # define OS_CODE 0x0b
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86 #endif
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87
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88 #if defined(VAXC) || defined(VMS)
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89 # define OS_CODE 0x02
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90 # define FOPEN(name, mode) \
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91 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
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92 #endif
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93
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94 #ifdef AMIGA
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95 # define OS_CODE 0x01
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96 #endif
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97
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98 #if defined(ATARI) || defined(atarist)
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99 # define OS_CODE 0x05
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100 #endif
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101
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102 #ifdef MACOS
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103 # define OS_CODE 0x07
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104 #endif
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105
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106 #ifdef __50SERIES /* Prime/PRIMOS */
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107 # define OS_CODE 0x0F
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108 #endif
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109
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110 #ifdef TOPS20
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111 # define OS_CODE 0x0a
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112 #endif
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113
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114 /* Common defaults */
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115
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116 #ifndef OS_CODE
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117 # define OS_CODE 0x03 /* assume Unix */
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118 #endif
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119
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120 #ifndef FOPEN
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121 # define FOPEN(name, mode) fopen((name), (mode))
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122 #endif
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123
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124 /* functions */
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125
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126 #ifdef HAVE_STRERROR
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127 extern char *strerror OF((int));
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128 # define zstrerror(errnum) strerror(errnum)
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129 #else
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130 # define zstrerror(errnum) ""
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131 #endif
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132
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133 #if defined(pyr)
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134 # define NO_MEMCPY
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135 #endif
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136 #if (defined(M_I86SM) || defined(M_I86MM)) && !defined(_MSC_VER)
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137 /* Use our own functions for small and medium model with MSC <= 5.0.
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138 * You may have to use the same strategy for Borland C (untested).
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139 */
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140 # define NO_MEMCPY
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141 #endif
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142 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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143 # define HAVE_MEMCPY
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144 #endif
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145 #ifdef HAVE_MEMCPY
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146 # if defined(M_I86SM) || defined(M_I86MM) /* MSC small or medium model */
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147 # define zmemcpy _fmemcpy
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148 # define zmemzero(dest, len) _fmemset(dest, 0, len)
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149 # else
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150 # define zmemcpy memcpy
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151 # define zmemzero(dest, len) memset(dest, 0, len)
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152 # endif
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153 #else
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154 extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len));
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155 extern void zmemzero OF((Bytef* dest, uInt len));
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156 #endif
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157
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158 /* Diagnostic functions */
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159 #ifdef DEBUG
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160 # include <stdio.h>
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161 # ifndef verbose
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162 # define verbose 0
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163 # endif
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164 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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165 # define Trace(x) fprintf x
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166 # define Tracev(x) {if (verbose) fprintf x ;}
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167 # define Tracevv(x) {if (verbose>1) fprintf x ;}
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168 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
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169 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
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170 #else
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171 # define Assert(cond,msg)
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172 # define Trace(x)
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173 # define Tracev(x)
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174 # define Tracevv(x)
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175 # define Tracec(c,x)
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176 # define Tracecv(c,x)
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177 #endif
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178
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179
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180 typedef uLong (*check_func) OF((uLong check, Bytef *buf, uInt len));
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181
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182 extern void z_error OF((char *m));
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183
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184 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
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185 void zcfree OF((voidpf opaque, voidpf ptr));
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186
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187 #define ZALLOC(strm, items, size) \
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188 (*((strm)->zalloc))((strm)->opaque, (items), (size))
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189 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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190 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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191
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192 #endif /* _Z_UTIL_H */
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