1 /* zutil.cpp -- target dependent utility functions for the compression library |
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2 * Copyright (C) 1995-2005 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 /* @(#) $Id: zutil.cpp,v 1.1.2.1 2008/08/14 15:26:58 e0222316 Exp $ */ |
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7 |
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8 #ifdef SYMBIAN_EZLIB_DEVICE |
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9 #include <e32base.h> |
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10 #endif |
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11 |
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12 #include "zutil.h" |
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13 |
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14 |
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15 #ifndef NO_DUMMY_DECL |
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16 struct internal_state {int dummy;}; /* for buggy compilers */ |
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17 #endif |
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18 |
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19 |
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20 const char * const z_errmsg[10] = { |
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21 "need dictionary", /* Z_NEED_DICT 2 */ |
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22 "stream end", /* Z_STREAM_END 1 */ |
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23 "", /* Z_OK 0 */ |
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24 "file error", /* Z_ERRNO (-1) */ |
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25 "stream error", /* Z_STREAM_ERROR (-2) */ |
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26 "data error", /* Z_DATA_ERROR (-3) */ |
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27 "insufficient memory", /* Z_MEM_ERROR (-4) */ |
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28 "buffer error", /* Z_BUF_ERROR (-5) */ |
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29 "incompatible version",/* Z_VERSION_ERROR (-6) */ |
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30 ""}; |
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31 |
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32 |
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33 #ifdef __SYMBIAN32__ |
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34 EXPORT_C const char * zlibVersion_r() |
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35 #else |
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36 const char * ZEXPORT zlibVersion() |
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37 #endif //__SYMBIAN32__ |
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38 { |
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39 return ZLIB_VERSION; |
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40 } |
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41 |
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42 |
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43 #ifdef __SYMBIAN32__ |
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44 EXPORT_C uLong zlibCompileFlags_r() |
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45 #else |
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46 uLong ZEXPORT zlibCompileFlags() |
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47 #endif //__SYMBIAN32__ |
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48 { |
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49 uLong flags; |
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50 |
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51 flags = 0; |
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52 switch (sizeof(uInt)) { |
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53 case 2: break; |
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54 case 4: flags += 1; break; |
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55 case 8: flags += 2; break; |
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56 default: flags += 3; |
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57 } |
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58 switch (sizeof(uLong)) { |
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59 case 2: break; |
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60 case 4: flags += 1 << 2; break; |
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61 case 8: flags += 2 << 2; break; |
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62 default: flags += 3 << 2; |
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63 } |
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64 switch (sizeof(voidpf)) { |
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65 case 2: break; |
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66 case 4: flags += 1 << 4; break; |
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67 case 8: flags += 2 << 4; break; |
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68 default: flags += 3 << 4; |
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69 } |
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70 switch (sizeof(z_off_t)) { |
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71 case 2: break; |
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72 case 4: flags += 1 << 6; break; |
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73 case 8: flags += 2 << 6; break; |
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74 default: flags += 3 << 6; |
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75 } |
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76 #ifdef DEBUG |
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77 flags += 1 << 8; |
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78 #endif |
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79 #if defined(ASMV) || defined(ASMINF) |
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80 flags += 1 << 9; |
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81 #endif |
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82 #ifdef ZLIB_WINAPI |
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83 flags += 1 << 10; |
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84 #endif |
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85 #ifdef BUILDFIXED |
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86 flags += 1 << 12; |
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87 #endif |
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88 #ifdef DYNAMIC_CRC_TABLE |
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89 flags += 1 << 13; |
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90 #endif |
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91 #ifdef NO_GZCOMPRESS |
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92 flags += 1L << 16; |
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93 #endif |
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94 #ifdef NO_GZIP |
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95 flags += 1L << 17; |
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96 #endif |
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97 #ifdef PKZIP_BUG_WORKAROUND |
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98 flags += 1L << 20; |
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99 #endif |
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100 #ifdef FASTEST |
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101 flags += 1L << 21; |
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102 #endif |
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103 #ifdef STDC |
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104 # ifdef NO_vsnprintf |
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105 flags += 1L << 25; |
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106 # ifdef HAS_vsprintf_void |
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107 flags += 1L << 26; |
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108 # endif |
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109 # else |
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110 # ifdef HAS_vsnprintf_void |
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111 flags += 1L << 26; |
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112 # endif |
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113 # endif |
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114 #else |
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115 flags += 1L << 24; |
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116 # ifdef NO_snprintf |
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117 flags += 1L << 25; |
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118 # ifdef HAS_sprintf_void |
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119 flags += 1L << 26; |
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120 # endif |
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121 # else |
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122 # ifdef HAS_snprintf_void |
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123 flags += 1L << 26; |
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124 # endif |
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125 # endif |
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126 #endif |
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127 return flags; |
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128 } |
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129 |
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130 #ifdef DEBUG |
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131 |
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132 # ifndef verbose |
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133 # define verbose 0 |
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134 # endif |
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135 int z_verbose = verbose; |
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136 |
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137 void z_error (m) |
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138 char *m; |
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139 { |
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140 fprintf(stderr, "%s\n", m); |
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141 exit(1); |
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142 } |
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143 #endif |
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144 |
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145 |
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146 /* exported to allow conversion of error code to string for compress() and |
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147 * uncompress() |
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148 */ |
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149 #ifdef __SYMBIAN32__ |
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150 EXPORT_C const char * zError_r(int err) |
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151 #else |
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152 const char * ZEXPORT zError(err) |
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153 int err; |
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154 #endif //__SYMBIAN32__ |
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155 { |
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156 return ERR_MSG(err); |
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157 } |
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158 |
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159 |
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160 #if defined(_WIN32_WCE) |
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161 /* The Microsoft C Run-Time Library for Windows CE doesn't have |
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162 * errno. We define it as a global variable to simplify porting. |
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163 * Its value is always 0 and should not be used. |
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164 */ |
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165 int errno = 0; |
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166 #endif |
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167 |
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168 #ifndef HAVE_MEMCPY |
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169 |
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170 #ifdef __SYMBIAN32__ |
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171 void zmemcpy( Bytef* dest,const Bytef* source,uInt len) |
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172 #else |
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173 void zmemcpy(dest, source, len) |
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174 Bytef* dest; |
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175 const Bytef* source; |
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176 uInt len; |
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177 #endif //__SYMBIAN32__ |
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178 { |
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179 if (len == 0) return; |
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180 do { |
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181 *dest++ = *source++; /* ??? to be unrolled */ |
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182 } while (--len != 0); |
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183 } |
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184 |
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185 #ifdef __SYMBIAN32__ |
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186 int zmemcmp( const Bytef* s1, const Bytef* s2,uInt len) |
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187 #else |
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188 int zmemcmp(s1, s2, len) |
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189 const Bytef* s1; |
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190 const Bytef* s2; |
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191 uInt len; |
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192 #endif //__SYMBIAN32__ |
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193 { |
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194 uInt j; |
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195 |
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196 for (j = 0; j < len; j++) { |
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197 if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1; |
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198 } |
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199 return 0; |
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200 } |
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201 |
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202 #ifdef __SYMBIAN32__ |
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203 void zmemzero( Bytef* dest,uInt len) |
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204 #else |
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205 void zmemzero(dest, len) |
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206 Bytef* dest; |
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207 uInt len; |
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208 #endif //__SYMBIAN32__ |
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209 { |
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210 if (len == 0) return; |
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211 do { |
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212 *dest++ = 0; /* ??? to be unrolled */ |
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213 } while (--len != 0); |
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214 } |
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215 #endif |
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216 |
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217 |
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218 #ifdef SYS16BIT |
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219 |
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220 #ifdef __TURBOC__ |
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221 /* Turbo C in 16-bit mode */ |
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222 |
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223 # define MY_ZCALLOC |
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224 |
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225 /* Turbo C malloc() does not allow dynamic allocation of 64K bytes |
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226 * and farmalloc(64K) returns a pointer with an offset of 8, so we |
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227 * must fix the pointer. Warning: the pointer must be put back to its |
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228 * original form in order to free it, use zcfree(). |
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229 */ |
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230 |
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231 #define MAX_PTR 10 |
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232 /* 10*64K = 640K */ |
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233 |
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234 local int next_ptr = 0; |
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235 |
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236 typedef struct ptr_table_s { |
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237 voidpf org_ptr; |
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238 voidpf new_ptr; |
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239 } ptr_table; |
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240 |
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241 local ptr_table table[MAX_PTR]; |
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242 /* This table is used to remember the original form of pointers |
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243 * to large buffers (64K). Such pointers are normalized with a zero offset. |
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244 * Since MSDOS is not a preemptive multitasking OS, this table is not |
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245 * protected from concurrent access. This hack doesn't work anyway on |
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246 * a protected system like OS/2. Use Microsoft C instead. |
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247 */ |
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248 |
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249 voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) |
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250 { |
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251 voidpf buf = opaque; /* just to make some compilers happy */ |
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252 ulg bsize = (ulg)items*size; |
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253 |
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254 /* If we allocate less than 65520 bytes, we assume that farmalloc |
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255 * will return a usable pointer which doesn't have to be normalized. |
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256 */ |
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257 if (bsize < 65520L) { |
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258 buf = farmalloc(bsize); |
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259 if (*(ush*)&buf != 0) return buf; |
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260 } else { |
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261 buf = farmalloc(bsize + 16L); |
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262 } |
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263 if (buf == NULL || next_ptr >= MAX_PTR) return NULL; |
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264 table[next_ptr].org_ptr = buf; |
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265 |
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266 /* Normalize the pointer to seg:0 */ |
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267 *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4; |
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268 *(ush*)&buf = 0; |
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269 table[next_ptr++].new_ptr = buf; |
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270 return buf; |
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271 } |
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272 |
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273 void zcfree (voidpf opaque, voidpf ptr) |
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274 { |
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275 int n; |
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276 if (*(ush*)&ptr != 0) { /* object < 64K */ |
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277 farfree(ptr); |
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278 return; |
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279 } |
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280 /* Find the original pointer */ |
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281 for (n = 0; n < next_ptr; n++) { |
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282 if (ptr != table[n].new_ptr) continue; |
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283 |
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284 farfree(table[n].org_ptr); |
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285 while (++n < next_ptr) { |
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286 table[n-1] = table[n]; |
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287 } |
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288 next_ptr--; |
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289 return; |
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290 } |
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291 ptr = opaque; /* just to make some compilers happy */ |
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292 Assert(0, "zcfree: ptr not found"); |
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293 } |
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294 |
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295 #endif /* __TURBOC__ */ |
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296 |
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297 |
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298 #ifdef M_I86 |
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299 /* Microsoft C in 16-bit mode */ |
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300 |
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301 # define MY_ZCALLOC |
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302 |
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303 #if (!defined(_MSC_VER) || (_MSC_VER <= 600)) |
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304 # define _halloc halloc |
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305 # define _hfree hfree |
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306 #endif |
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307 |
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308 voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) |
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309 { |
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310 if (opaque) opaque = 0; /* to make compiler happy */ |
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311 return _halloc((long)items, size); |
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312 } |
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313 |
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314 void zcfree (voidpf opaque, voidpf ptr) |
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315 { |
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316 if (opaque) opaque = 0; /* to make compiler happy */ |
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317 _hfree(ptr); |
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318 } |
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319 |
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320 #endif /* M_I86 */ |
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321 |
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322 #endif /* SYS16BIT */ |
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323 |
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324 |
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325 |
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326 #ifndef MY_ZCALLOC /* Any system without a special alloc function */ |
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327 |
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328 #ifndef STDC |
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329 extern voidp malloc OF((uInt size)); |
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330 extern voidp calloc OF((uInt items, uInt size)); |
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331 extern void free OF((voidpf ptr)); |
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332 #endif |
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333 |
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334 #ifdef __SYMBIAN32__ |
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335 voidpf zcalloc (voidpf opaque,unsigned items, unsigned size) |
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336 #else |
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337 voidpf zcalloc (opaque, items, size) |
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338 voidpf opaque; |
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339 unsigned items; |
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340 unsigned size; |
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341 #endif //__SYMBIAN32__ |
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342 { |
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343 if (opaque) items += size - size; /* make compiler happy */ |
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344 #ifndef SYMBIAN_EZLIB_DEVICE |
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345 return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) : (voidpf)calloc(items, size); |
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346 #else |
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347 TInt bytes = items*size; |
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348 TAny *ptr = User::AllocZ(bytes); // Symbian Native memory allocation API |
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349 return (voidpf) ptr; |
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350 #endif //SYMBIAN_EZLIB_DEVICE |
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351 } |
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352 |
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353 #ifdef __SYMBIAN32__ |
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354 void zcfree (voidpf opaque,voidpf ptr) |
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355 #else |
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356 void zcfree (opaque, ptr) |
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357 voidpf opaque; |
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358 voidpf ptr; |
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359 #endif //__SYMBIAN32__ |
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360 { |
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361 #ifndef SYMBIAN_EZLIB_DEVICE |
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362 free(ptr); |
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363 #else |
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364 User::Free(ptr); // Symbian Native memory deallocation API |
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365 #endif //SYMBIAN_EZLIB_DEVICE |
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366 if (opaque) return; /* make compiler happy */ |
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367 } |
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368 |
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369 #endif /* MY_ZCALLOC */ |
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370 |
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371 |
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