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4680 | right-hear | 1 | |
2 | * |
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3 | * libpng version 1.5.1 - February 3, 2011 |
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4 | * |
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5 | * Copyright (c) 1998-2011 Glenn Randers-Pehrson |
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6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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8 | * |
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9 | * This code is released under the libpng license. |
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10 | * For conditions of distribution and use, see the disclaimer |
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11 | * and license in png.h |
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12 | * |
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13 | */ |
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14 | |||
15 | |||
16 | * are configuring libpng for a machine, you may want to read the section |
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17 | * starting here down to where it starts to typedef png_color, png_text, |
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18 | * and png_info. |
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19 | */ |
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20 | |||
21 | |||
22 | #define PNGCONF_H |
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23 | |||
24 | |||
25 | * definition file for machine specific limits, this may impact the |
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26 | * correctness of the definitons below (see uses of INT_MAX). |
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27 | */ |
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28 | #ifndef PNG_NO_LIMITS_H |
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29 | # include |
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30 | #endif |
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31 | |||
32 | |||
33 | * because this file defines png_memcpy and so on the base APIs must |
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34 | * be defined here. |
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35 | */ |
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36 | #ifdef BSD |
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37 | # include |
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38 | #else |
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39 | # include |
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40 | #endif |
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41 | |||
42 | |||
43 | * FILE |
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44 | */ |
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45 | #ifdef PNG_STDIO_SUPPORTED |
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46 | # include |
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47 | #endif |
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48 | |||
49 | |||
50 | * from PNG files. It can be set on a per-app-file basis - it |
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51 | * just changes whether a macro is used to the function is called. |
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52 | * The library builder sets the default, if read functions are not |
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53 | * built into the library the macro implementation is forced on. |
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54 | */ |
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55 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED |
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56 | # define PNG_USE_READ_MACROS |
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57 | #endif |
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58 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) |
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59 | # if PNG_DEFAULT_READ_MACROS |
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60 | # define PNG_USE_READ_MACROS |
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61 | # endif |
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62 | #endif |
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63 | |||
64 | |||
65 | * |
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66 | * These options are provided so that a variety of difficult compilers |
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67 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE |
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68 | * below) but still have compiler specific implementations, others |
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69 | * may be changed on a per-file basis when compiling against libpng. |
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70 | */ |
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71 | |||
72 | |||
73 | * prototypes (ie K&R style headers). If your compiler does not handle |
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74 | * function prototypes, define this macro and use the included ansi2knr. |
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75 | * I've always been able to use _NO_PROTO as the indicator, but you may |
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76 | * need to drag the empty declaration out in front of here, or change the |
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77 | * ifdef to suit your own needs. |
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78 | */ |
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79 | #ifndef PNGARG |
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80 | |||
81 | |||
82 | # define PNGARG(arglist) OF(arglist) |
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83 | # else |
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84 | |||
85 | |||
86 | # define PNGARG(arglist) () |
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87 | # else |
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88 | # define PNGARG(arglist) arglist |
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89 | # endif /* _NO_PROTO */ |
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90 | |||
91 | |||
92 | |||
93 | |||
94 | |||
95 | |||
96 | * ============================= |
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97 | * Normally it is not necessary to specify to the compiler how to call |
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98 | * a function - it just does it - however on x86 systems derived from |
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99 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems |
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100 | * and some others) there are multiple ways to call a function and the |
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101 | * default can be changed on the compiler command line. For this reason |
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102 | * libpng specifies the calling convention of every exported function and |
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103 | * every function called via a user supplied function pointer. This is |
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104 | * done in this file by defining the following macros: |
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105 | * |
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106 | * PNGAPI Calling convention for exported functions. |
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107 | * PNGCBAPI Calling convention for user provided (callback) functions. |
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108 | * PNGCAPI Calling convention used by the ANSI-C library (required |
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109 | * for longjmp callbacks and sometimes used internally to |
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110 | * specify the calling convention for zlib). |
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111 | * |
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112 | * These macros should never be overridden. If it is necessary to |
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113 | * change calling convention in a private build this can be done |
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114 | * by setting PNG_API_RULE (which defaults to 0) to one of the values |
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115 | * below to select the correct 'API' variants. |
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116 | * |
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117 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. |
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118 | * This is correct in every known environment. |
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119 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and |
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120 | * the 'C' calling convention (from PNGCAPI) for |
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121 | * callbacks (PNGCBAPI). This is no longer required |
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122 | * in any known environment - if it has to be used |
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123 | * please post an explanation of the problem to the |
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124 | * libpng mailing list. |
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125 | * |
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126 | * These cases only differ if the operating system does not use the C |
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127 | * calling convention, at present this just means the above cases |
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128 | * (x86 DOS/Windows sytems) and, even then, this does not apply to |
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129 | * Cygwin running on those systems. |
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130 | * |
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131 | * Note that the value must be defined in pnglibconf.h so that what |
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132 | * the application uses to call the library matches the conventions |
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133 | * set when building the library. |
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134 | */ |
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135 | |||
136 | |||
137 | * ============= |
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138 | * When building a shared library it is almost always necessary to tell |
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139 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' |
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140 | * is used to mark the symbols. On some systems these symbols can be |
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141 | * extracted at link time and need no special processing by the compiler, |
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142 | * on other systems the symbols are flagged by the compiler and just |
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143 | * the declaration requires a special tag applied (unfortunately) in a |
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144 | * compiler dependent way. Some systems can do either. |
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145 | * |
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146 | * A small number of older systems also require a symbol from a DLL to |
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147 | * be flagged to the program that calls it. This is a problem because |
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148 | * we do not know in the header file included by application code that |
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149 | * the symbol will come from a shared library, as opposed to a statically |
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150 | * linked one. For this reason the application must tell us by setting |
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151 | * the magic flag PNG_USE_DLL to turn on the special processing before |
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152 | * it includes png.h. |
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153 | * |
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154 | * Four additional macros are used to make this happen: |
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155 | * |
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156 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from |
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157 | * the build or imported if PNG_USE_DLL is set - compiler |
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158 | * and system specific. |
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159 | * |
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160 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to |
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161 | * 'type', compiler specific. |
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162 | * |
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163 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to |
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164 | * make a symbol exported from the DLL. |
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165 | * |
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166 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come |
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167 | * from a DLL - used to define PNG_IMPEXP when |
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168 | * PNG_USE_DLL is set. |
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169 | */ |
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170 | |||
171 | |||
172 | * ========================== |
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173 | * This code is used at build time to find PNG_IMPEXP, the API settings |
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174 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL |
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175 | * import processing is possible. On Windows/x86 systems it also sets |
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176 | * compiler-specific macros to the values required to change the calling |
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177 | * conventions of the various functions. |
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178 | */ |
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179 | #if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ |
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180 | defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ |
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181 | ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ |
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182 | defined(_M_X64) || defined(_M_IA64) ) |
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183 | /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes |
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184 | * builds under Cygwin or MinGW. Also includes Watcom builds but these need |
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185 | * special treatment because they are not compatible with GCC or Visual C |
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186 | * because of different calling conventions. |
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187 | */ |
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188 | # if PNG_API_RULE == 2 |
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189 | /* If this line results in an error, either because __watcall is not |
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190 | * understood or because of a redefine just below you cannot use *this* |
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191 | * build of the library with the compiler you are using. *This* build was |
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192 | * build using Watcom and applications must also be built using Watcom! |
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193 | */ |
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194 | # define PNGCAPI __watcall |
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195 | # endif |
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196 | |||
197 | |||
198 | # define PNGCAPI __cdecl |
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199 | # if PNG_API_RULE == 1 |
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200 | # define PNGAPI __stdcall |
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201 | # endif |
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202 | # else |
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203 | /* An older compiler, or one not detected (erroneously) above, |
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204 | * if necessary override on the command line to get the correct |
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205 | * variants for the compiler. |
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206 | */ |
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207 | # ifndef PNGCAPI |
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208 | # define PNGCAPI _cdecl |
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209 | # endif |
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210 | # if PNG_API_RULE == 1 && !defined(PNGAPI) |
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211 | # define PNGAPI _stdcall |
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212 | # endif |
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213 | # endif /* compiler/api */ |
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214 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
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215 | |||
216 | |||
217 | ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed |
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218 | # endif |
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219 | |||
220 | |||
221 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
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222 | /* older Borland and MSC |
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223 | * compilers used '__export' and required this to be after |
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224 | * the type. |
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225 | */ |
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226 | # ifndef PNG_EXPORT_TYPE |
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227 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
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228 | # endif |
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229 | # define PNG_DLL_EXPORT __export |
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230 | # else /* newer compiler */ |
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231 | # define PNG_DLL_EXPORT __declspec(dllexport) |
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232 | # ifndef PNG_DLL_IMPORT |
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233 | # define PNG_DLL_IMPORT __declspec(dllimport) |
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234 | # endif |
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235 | # endif /* compiler */ |
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236 | |||
237 | |||
238 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
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239 | # define PNGAPI _System |
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240 | # else /* !Windows/x86 && !OS/2 */ |
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241 | /* Use the defaults, or define PNG*API on the command line (but |
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242 | * this will have to be done for every compile!) |
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243 | */ |
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244 | # endif /* other system, !OS/2 */ |
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245 | #endif /* !Windows/x86 */ |
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246 | |||
247 | |||
248 | #ifndef PNGCAPI |
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249 | # define PNGCAPI |
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250 | #endif |
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251 | #ifndef PNGCBAPI |
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252 | # define PNGCBAPI PNGCAPI |
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253 | #endif |
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254 | #ifndef PNGAPI |
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255 | # define PNGAPI PNGCAPI |
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256 | #endif |
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257 | |||
258 | |||
259 | * being built or used. |
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260 | */ |
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261 | #ifndef PNG_IMPEXP |
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262 | # ifdef PNGLIB_BUILD |
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263 | /* Building the library */ |
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264 | # if (defined(DLL_EXPORT)/*from libtool*/ ||\ |
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265 | defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\ |
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266 | defined(_USRDLL) ||\ |
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267 | defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT) |
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268 | /* Building a DLL. */ |
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269 | # define PNG_IMPEXP PNG_DLL_EXPORT |
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270 | # endif /* DLL */ |
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271 | # else |
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272 | /* Using the library */ |
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273 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
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274 | /* This forces use of a DLL, disallowing static linking */ |
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275 | # define PNG_IMPEXP PNG_DLL_IMPORT |
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276 | # endif |
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277 | # endif |
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278 | |||
279 | |||
280 | # define PNG_IMPEXP |
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281 | # endif |
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282 | #endif |
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283 | |||
284 | |||
285 | * declared function in the correct place. This potentially requires a separate |
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286 | * PNG_EXPORT function for every compiler. |
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287 | */ |
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288 | #ifndef PNG_FUNCTION |
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289 | # ifdef __GNUC__ |
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290 | # define PNG_FUNCTION(type, name, args, attributes)\ |
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291 | attributes type name args |
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292 | # else /* !GNUC */ |
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293 | # ifdef _MSC_VER |
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294 | # define PNG_FUNCTION(type, name, args, attributes)\ |
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295 | attributes type name args |
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296 | # else /* !MSC */ |
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297 | # define PNG_FUNCTION(type, name, args, attributes)\ |
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298 | type name args |
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299 | # endif |
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300 | # endif |
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301 | #endif |
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302 | |||
303 | |||
304 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
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305 | #endif |
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306 | |||
307 | |||
308 | * table entries, so we discard it here. See the .dfn files in the |
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309 | * scripts directory. |
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310 | */ |
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311 | #ifndef PNG_EXPORTA |
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312 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
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313 | extern PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args),\ |
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314 | attributes) |
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315 | #endif |
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316 | |||
317 | |||
318 | PNG_EXPORTA(ordinal, type, name, args, ) |
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319 | |||
320 | |||
321 | #ifndef PNG_REMOVED |
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322 | # define PNG_REMOVED(ordinal, type, name, args, attributes) |
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323 | #endif |
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324 | |||
325 | |||
326 | # define PNG_CALLBACK(type, name, args, attributes)\ |
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327 | type (PNGCBAPI name) PNGARG(args) attributes |
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328 | #endif |
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329 | |||
330 | |||
331 | * so that where compiler support is available incorrect use of API |
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332 | * functions in png.h will generate compiler warnings. |
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333 | * |
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334 | * Added at libpng-1.2.41. |
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335 | */ |
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336 | |||
337 | |||
338 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
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339 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED |
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340 | # endif |
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341 | #endif |
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342 | |||
343 | |||
344 | /* Support for compiler specific function attributes. These are used |
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345 | * so that where compiler support is available incorrect use of API |
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346 | * functions in png.h will generate compiler warnings. Added at libpng |
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347 | * version 1.2.41. |
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348 | */ |
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349 | # ifdef __GNUC__ |
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350 | # ifndef PNG_USE_RESULT |
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351 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
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352 | # endif |
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353 | # ifndef PNG_NORETURN |
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354 | # define PNG_NORETURN __attribute__((__noreturn__)) |
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355 | # endif |
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356 | # ifndef PNG_PTR_NORETURN |
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357 | # define PNG_PTR_NORETURN __attribute__((__noreturn__)) |
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358 | # endif |
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359 | # ifndef PNG_ALLOCATED |
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360 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
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361 | # endif |
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362 | |||
363 | |||
364 | * accessed from within the library, therefore should be empty during |
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365 | * a library build. |
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366 | */ |
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367 | # ifndef PNGLIB_BUILD |
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368 | # ifndef PNG_DEPRECATED |
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369 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
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370 | # endif |
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371 | # ifndef PNG_DEPSTRUCT |
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372 | # define PNG_DEPSTRUCT __attribute__((__deprecated__)) |
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373 | # endif |
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374 | # ifndef PNG_PRIVATE |
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375 | # if 0 /* Doesn't work so we use deprecated instead*/ |
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376 | # define PNG_PRIVATE \ |
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377 | __attribute__((warning("This function is not exported by libpng."))) |
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378 | # else |
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379 | # define PNG_PRIVATE \ |
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380 | __attribute__((__deprecated__)) |
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381 | # endif |
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382 | # endif /* PNG_PRIVATE */ |
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383 | # endif /* PNGLIB_BUILD */ |
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384 | # endif /* __GNUC__ */ |
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385 | # ifdef _MSC_VER /* may need to check value */ |
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386 | # ifndef PNG_USE_RESULT |
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387 | # define PNG_USE_RESULT /*not supported*/ |
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388 | # endif |
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389 | # ifndef PNG_NORETURN |
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390 | # define PNG_NORETURN __declspec(noreturn) |
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391 | # endif |
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392 | # ifndef PNG_PTR_NORETURN |
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393 | # define PNG_PTR_NORETURN /*not supported*/ |
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394 | # endif |
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395 | # ifndef PNG_ALLOCATED |
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396 | # define PNG_ALLOCATED __declspec(restrict) |
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397 | # endif |
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398 | |||
399 | |||
400 | * accessed from within the library, therefore should be empty during |
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401 | * a library build. |
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402 | */ |
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403 | # ifndef PNGLIB_BUILD |
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404 | # ifndef PNG_DEPRECATED |
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405 | # define PNG_DEPRECATED __declspec(deprecated) |
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406 | # endif |
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407 | # ifndef PNG_DEPSTRUCT |
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408 | # define PNG_DEPSTRUCT __declspec(deprecated) |
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409 | # endif |
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410 | # ifndef PNG_PRIVATE |
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411 | # define PNG_PRIVATE __declspec(deprecated) |
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412 | # endif /* PNG_PRIVATE */ |
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413 | # endif /* PNGLIB_BUILD */ |
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414 | # endif /* __GNUC__ */ |
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415 | #endif /* PNG_PEDANTIC_WARNINGS */ |
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416 | |||
417 | |||
418 | # define PNG_DEPRECATED /* Use of this function is deprecated */ |
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419 | #endif |
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420 | #ifndef PNG_USE_RESULT |
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421 | # define PNG_USE_RESULT /* The result of this function must be checked */ |
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422 | #endif |
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423 | #ifndef PNG_NORETURN |
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424 | # define PNG_NORETURN /* This function does not return */ |
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425 | #endif |
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426 | #ifndef PNG_ALLOCATED |
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427 | # define PNG_ALLOCATED /* The result of the function is new memory */ |
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428 | #endif |
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429 | #ifndef PNG_DEPSTRUCT |
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430 | # define PNG_DEPSTRUCT /* Access to this struct member is deprecated */ |
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431 | #endif |
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432 | #ifndef PNG_PRIVATE |
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433 | # define PNG_PRIVATE /* This is a private libpng function */ |
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434 | #endif |
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435 | #ifndef PNG_FP_EXPORT /* A floating point API. */ |
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436 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
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437 | # define PNG_FP_EXPORT(ordinal, type, name, args)\ |
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438 | PNG_EXPORT(ordinal, type, name, args) |
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439 | # else /* No floating point APIs */ |
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440 | # define PNG_FP_EXPORT(ordinal, type, name, args) |
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441 | # endif |
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442 | #endif |
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443 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
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444 | # ifdef PNG_FIXED_POINT_SUPPORTED |
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445 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
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446 | PNG_EXPORT(ordinal, type, name, args) |
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447 | # else /* No fixed point APIs */ |
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448 | # define PNG_FIXED_EXPORT(ordinal, type, name, args) |
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449 | # endif |
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450 | #endif |
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451 | |||
452 | |||
453 | * and warning message functions, so some compilers won't complain. |
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454 | * If you do not want to use const, define PNG_NO_CONST here. |
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455 | * |
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456 | * This should not change how the APIs are called, so it can be done |
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457 | * on a per-file basis in the application. |
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458 | */ |
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459 | #ifndef PNG_CONST |
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460 | # ifndef PNG_NO_CONST |
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461 | # define PNG_CONST const |
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462 | # else |
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463 | # define PNG_CONST |
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464 | # endif |
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465 | #endif |
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466 | |||
467 | |||
468 | * common platforms. The typedefs should be at least as large as the |
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469 | * numbers suggest (a png_uint_32 must be at least 32 bits long), but they |
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470 | * don't have to be exactly that size. Some compilers dislike passing |
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471 | * unsigned shorts as function parameters, so you may be better off using |
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472 | * unsigned int for png_uint_16. |
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473 | */ |
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474 | |||
475 | |||
476 | typedef unsigned int png_uint_32; |
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477 | typedef int png_int_32; |
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478 | #else |
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479 | typedef unsigned long png_uint_32; |
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480 | typedef long png_int_32; |
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481 | #endif |
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482 | typedef unsigned short png_uint_16; |
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483 | typedef short png_int_16; |
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484 | typedef unsigned char png_byte; |
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485 | |||
486 | |||
487 | typedef unsigned int png_size_t; |
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488 | #else |
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489 | typedef size_t png_size_t; |
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490 | #endif |
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491 | #define png_sizeof(x) (sizeof (x)) |
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492 | |||
493 | |||
494 | * pngpriv.h header. Needs modification for other compilers besides |
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495 | * MSC. Model independent support declares all arrays and pointers to be |
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496 | * large using the far keyword. The zlib version used must also support |
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497 | * model independent data. As of version zlib 1.0.4, the necessary changes |
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498 | * have been made in zlib. The USE_FAR_KEYWORD define triggers other |
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499 | * changes that are needed. (Tim Wegner) |
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500 | */ |
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501 | |||
502 | |||
503 | * defines FAR. (SJT) |
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504 | */ |
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505 | #ifdef __BORLANDC__ |
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506 | # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) |
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507 | # define LDATA 1 |
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508 | # else |
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509 | # define LDATA 0 |
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510 | # endif |
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511 | /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ |
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512 | # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) |
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513 | # define PNG_MAX_MALLOC_64K /* only used in build */ |
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514 | # if (LDATA != 1) |
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515 | # ifndef FAR |
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516 | # define FAR __far |
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517 | # endif |
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518 | # define USE_FAR_KEYWORD |
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519 | # endif /* LDATA != 1 */ |
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520 | /* Possibly useful for moving data out of default segment. |
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521 | * Uncomment it if you want. Could also define FARDATA as |
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522 | * const if your compiler supports it. (SJT) |
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523 | # define FARDATA FAR |
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524 | */ |
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525 | # endif /* __WIN32__, __FLAT__, __CYGWIN__ */ |
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526 | #endif /* __BORLANDC__ */ |
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527 | |||
528 | |||
529 | |||
530 | * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, |
||
531 | * making reliance oncertain keywords suspect. (SJT) |
||
532 | */ |
||
533 | |||
534 | |||
535 | #ifdef FAR |
||
536 | # ifdef M_I86MM |
||
537 | # define USE_FAR_KEYWORD |
||
538 | # define FARDATA FAR |
||
539 | # include |
||
540 | # endif |
||
541 | #endif |
||
542 | |||
543 | |||
544 | #ifndef FAR |
||
545 | # define FAR |
||
546 | #endif |
||
547 | |||
548 | |||
549 | #ifndef FARDATA |
||
550 | # define FARDATA |
||
551 | #endif |
||
552 | |||
553 | |||
554 | * to fixed-point with a multiple of 100,000, e.g., gamma |
||
555 | */ |
||
556 | typedef png_int_32 png_fixed_point; |
||
557 | |||
558 | |||
559 | typedef void FAR * png_voidp; |
||
560 | typedef PNG_CONST void FAR * png_const_voidp; |
||
561 | typedef png_byte FAR * png_bytep; |
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562 | typedef PNG_CONST png_byte FAR * png_const_bytep; |
||
563 | typedef png_uint_32 FAR * png_uint_32p; |
||
564 | typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; |
||
565 | typedef png_int_32 FAR * png_int_32p; |
||
566 | typedef PNG_CONST png_int_32 FAR * png_const_int_32p; |
||
567 | typedef png_uint_16 FAR * png_uint_16p; |
||
568 | typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; |
||
569 | typedef png_int_16 FAR * png_int_16p; |
||
570 | typedef PNG_CONST png_int_16 FAR * png_const_int_16p; |
||
571 | typedef char FAR * png_charp; |
||
572 | typedef PNG_CONST char FAR * png_const_charp; |
||
573 | typedef png_fixed_point FAR * png_fixed_point_p; |
||
574 | typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; |
||
575 | typedef png_size_t FAR * png_size_tp; |
||
576 | typedef PNG_CONST png_size_t FAR * png_const_size_tp; |
||
577 | |||
578 | |||
579 | typedef FILE * png_FILE_p; |
||
580 | #endif |
||
581 | |||
582 | |||
583 | typedef double FAR * png_doublep; |
||
584 | typedef PNG_CONST double FAR * png_const_doublep; |
||
585 | #endif |
||
586 | |||
587 | |||
588 | typedef png_byte FAR * FAR * png_bytepp; |
||
589 | typedef png_uint_32 FAR * FAR * png_uint_32pp; |
||
590 | typedef png_int_32 FAR * FAR * png_int_32pp; |
||
591 | typedef png_uint_16 FAR * FAR * png_uint_16pp; |
||
592 | typedef png_int_16 FAR * FAR * png_int_16pp; |
||
593 | typedef PNG_CONST char FAR * FAR * png_const_charpp; |
||
594 | typedef char FAR * FAR * png_charpp; |
||
595 | typedef png_fixed_point FAR * FAR * png_fixed_point_pp; |
||
596 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
||
597 | typedef double FAR * FAR * png_doublepp; |
||
598 | #endif |
||
599 | |||
600 | |||
601 | typedef char FAR * FAR * FAR * png_charppp; |
||
602 | |||
603 | |||
604 | * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 |
||
605 | * to png_alloc_size_t are not necessary; in fact, it is recommended |
||
606 | * not to use them at all so that the compiler can complain when something |
||
607 | * turns out to be problematic. |
||
608 | * Casts in the other direction (from png_alloc_size_t to png_size_t or |
||
609 | * png_uint_32) should be explicitly applied; however, we do not expect |
||
610 | * to encounter practical situations that require such conversions. |
||
611 | */ |
||
612 | #if defined(__TURBOC__) && !defined(__FLAT__) |
||
613 | typedef unsigned long png_alloc_size_t; |
||
614 | #else |
||
615 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
||
616 | typedef unsigned long png_alloc_size_t; |
||
617 | # else |
||
618 | /* This is an attempt to detect an old Windows system where (int) is |
||
619 | * actually 16 bits, in that case png_malloc must have an argument with a |
||
620 | * bigger size to accomodate the requirements of the library. |
||
621 | */ |
||
622 | # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ |
||
623 | (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) |
||
624 | typedef DWORD png_alloc_size_t; |
||
625 | # else |
||
626 | typedef png_size_t png_alloc_size_t; |
||
627 | # endif |
||
628 | # endif |
||
629 | #endif |
||
630 | |||
631 | |||
632 |