1 | |
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2 | /* pngconf.h - machine configurable file for libpng |
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3 | * |
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4 | * libpng version 1.5.11 - June 14, 2012 |
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5 | * |
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6 | * Copyright (c) 1998-2012 Glenn Randers-Pehrson |
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7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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9 | * |
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10 | * This code is released under the libpng license. |
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11 | * For conditions of distribution and use, see the disclaimer |
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12 | * and license in png.h |
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13 | * |
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14 | */ |
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15 | |
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16 | /* Any machine specific code is near the front of this file, so if you |
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17 | * are configuring libpng for a machine, you may want to read the section |
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18 | * starting here down to where it starts to typedef png_color, png_text, |
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19 | * and png_info. |
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20 | */ |
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21 | |
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22 | #ifndef PNGCONF_H |
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23 | #define PNGCONF_H |
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24 | |
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25 | #ifndef PNG_BUILDING_SYMBOL_TABLE |
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26 | /* PNG_NO_LIMITS_H may be used to turn off the use of the standard C |
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27 | * definition file for machine specific limits, this may impact the |
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28 | * correctness of the definitions below (see uses of INT_MAX). |
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29 | */ |
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30 | # ifndef PNG_NO_LIMITS_H |
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31 | # include <limits.h> |
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32 | # endif |
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33 | |
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34 | /* For the memory copy APIs (i.e. the standard definitions of these), |
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35 | * because this file defines png_memcpy and so on the base APIs must |
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36 | * be defined here. |
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37 | */ |
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38 | # ifdef BSD |
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39 | # include <strings.h> |
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40 | # else |
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41 | # include <string.h> |
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42 | # endif |
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43 | |
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44 | /* For png_FILE_p - this provides the standard definition of a |
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45 | * FILE |
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46 | */ |
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47 | # ifdef PNG_STDIO_SUPPORTED |
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48 | # include <stdio.h> |
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49 | # endif |
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50 | #endif |
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51 | |
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52 | /* This controls optimization of the reading of 16 and 32 bit values |
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53 | * from PNG files. It can be set on a per-app-file basis - it |
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54 | * just changes whether a macro is used when the function is called. |
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55 | * The library builder sets the default; if read functions are not |
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56 | * built into the library the macro implementation is forced on. |
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57 | */ |
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58 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED |
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59 | # define PNG_USE_READ_MACROS |
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60 | #endif |
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61 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) |
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62 | # if PNG_DEFAULT_READ_MACROS |
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63 | # define PNG_USE_READ_MACROS |
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64 | # endif |
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65 | #endif |
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66 | |
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67 | /* COMPILER SPECIFIC OPTIONS. |
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68 | * |
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69 | * These options are provided so that a variety of difficult compilers |
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70 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE |
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71 | * below) but still have compiler specific implementations, others |
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72 | * may be changed on a per-file basis when compiling against libpng. |
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73 | */ |
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74 | |
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75 | /* The PNGARG macro protects us against machines that don't have function |
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76 | * prototypes (ie K&R style headers). If your compiler does not handle |
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77 | * function prototypes, define this macro and use the included ansi2knr. |
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78 | * I've always been able to use _NO_PROTO as the indicator, but you may |
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79 | * need to drag the empty declaration out in front of here, or change the |
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80 | * ifdef to suit your own needs. |
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81 | */ |
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82 | #ifndef PNGARG |
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83 | |
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84 | # ifdef OF /* zlib prototype munger */ |
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85 | # define PNGARG(arglist) OF(arglist) |
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86 | # else |
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87 | |
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88 | # ifdef _NO_PROTO |
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89 | # define PNGARG(arglist) () |
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90 | # else |
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91 | # define PNGARG(arglist) arglist |
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92 | # endif /* _NO_PROTO */ |
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93 | |
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94 | # endif /* OF */ |
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95 | |
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96 | #endif /* PNGARG */ |
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97 | |
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98 | /* Function calling conventions. |
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99 | * ============================= |
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100 | * Normally it is not necessary to specify to the compiler how to call |
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101 | * a function - it just does it - however on x86 systems derived from |
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102 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems |
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103 | * and some others) there are multiple ways to call a function and the |
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104 | * default can be changed on the compiler command line. For this reason |
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105 | * libpng specifies the calling convention of every exported function and |
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106 | * every function called via a user supplied function pointer. This is |
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107 | * done in this file by defining the following macros: |
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108 | * |
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109 | * PNGAPI Calling convention for exported functions. |
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110 | * PNGCBAPI Calling convention for user provided (callback) functions. |
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111 | * PNGCAPI Calling convention used by the ANSI-C library (required |
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112 | * for longjmp callbacks and sometimes used internally to |
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113 | * specify the calling convention for zlib). |
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114 | * |
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115 | * These macros should never be overridden. If it is necessary to |
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116 | * change calling convention in a private build this can be done |
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117 | * by setting PNG_API_RULE (which defaults to 0) to one of the values |
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118 | * below to select the correct 'API' variants. |
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119 | * |
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120 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. |
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121 | * This is correct in every known environment. |
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122 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and |
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123 | * the 'C' calling convention (from PNGCAPI) for |
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124 | * callbacks (PNGCBAPI). This is no longer required |
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125 | * in any known environment - if it has to be used |
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126 | * please post an explanation of the problem to the |
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127 | * libpng mailing list. |
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128 | * |
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129 | * These cases only differ if the operating system does not use the C |
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130 | * calling convention, at present this just means the above cases |
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131 | * (x86 DOS/Windows sytems) and, even then, this does not apply to |
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132 | * Cygwin running on those systems. |
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133 | * |
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134 | * Note that the value must be defined in pnglibconf.h so that what |
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135 | * the application uses to call the library matches the conventions |
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136 | * set when building the library. |
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137 | */ |
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138 | |
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139 | /* Symbol export |
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140 | * ============= |
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141 | * When building a shared library it is almost always necessary to tell |
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142 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' |
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143 | * is used to mark the symbols. On some systems these symbols can be |
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144 | * extracted at link time and need no special processing by the compiler, |
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145 | * on other systems the symbols are flagged by the compiler and just |
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146 | * the declaration requires a special tag applied (unfortunately) in a |
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147 | * compiler dependent way. Some systems can do either. |
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148 | * |
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149 | * A small number of older systems also require a symbol from a DLL to |
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150 | * be flagged to the program that calls it. This is a problem because |
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151 | * we do not know in the header file included by application code that |
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152 | * the symbol will come from a shared library, as opposed to a statically |
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153 | * linked one. For this reason the application must tell us by setting |
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154 | * the magic flag PNG_USE_DLL to turn on the special processing before |
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155 | * it includes png.h. |
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156 | * |
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157 | * Four additional macros are used to make this happen: |
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158 | * |
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159 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from |
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160 | * the build or imported if PNG_USE_DLL is set - compiler |
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161 | * and system specific. |
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162 | * |
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163 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to |
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164 | * 'type', compiler specific. |
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165 | * |
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166 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to |
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167 | * make a symbol exported from the DLL. Not used in the |
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168 | * public header files; see pngpriv.h for how it is used |
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169 | * in the libpng build. |
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170 | * |
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171 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come |
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172 | * from a DLL - used to define PNG_IMPEXP when |
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173 | * PNG_USE_DLL is set. |
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174 | */ |
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175 | |
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176 | /* System specific discovery. |
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177 | * ========================== |
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178 | * This code is used at build time to find PNG_IMPEXP, the API settings |
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179 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL |
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180 | * import processing is possible. On Windows/x86 systems it also sets |
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181 | * compiler-specific macros to the values required to change the calling |
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182 | * conventions of the various functions. |
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183 | */ |
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184 | #if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ |
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185 | defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ |
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186 | ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ |
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187 | defined(_M_X64) || defined(_M_IA64) ) |
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188 | /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes |
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189 | * builds under Cygwin or MinGW. Also includes Watcom builds but these need |
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190 | * special treatment because they are not compatible with GCC or Visual C |
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191 | * because of different calling conventions. |
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192 | */ |
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193 | # if PNG_API_RULE == 2 |
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194 | /* If this line results in an error, either because __watcall is not |
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195 | * understood or because of a redefine just below you cannot use *this* |
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196 | * build of the library with the compiler you are using. *This* build was |
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197 | * build using Watcom and applications must also be built using Watcom! |
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198 | */ |
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199 | # define PNGCAPI __watcall |
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200 | # endif |
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201 | |
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202 | # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) |
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203 | # define PNGCAPI __cdecl |
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204 | # if PNG_API_RULE == 1 |
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205 | # define PNGAPI __stdcall |
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206 | # endif |
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207 | # else |
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208 | /* An older compiler, or one not detected (erroneously) above, |
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209 | * if necessary override on the command line to get the correct |
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210 | * variants for the compiler. |
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211 | */ |
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212 | # ifndef PNGCAPI |
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213 | # define PNGCAPI _cdecl |
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214 | # endif |
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215 | # if PNG_API_RULE == 1 && !defined(PNGAPI) |
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216 | # define PNGAPI _stdcall |
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217 | # endif |
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218 | # endif /* compiler/api */ |
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219 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
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220 | |
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221 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) |
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222 | ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed |
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223 | # endif |
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224 | |
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225 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ |
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226 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
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227 | /* older Borland and MSC |
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228 | * compilers used '__export' and required this to be after |
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229 | * the type. |
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230 | */ |
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231 | # ifndef PNG_EXPORT_TYPE |
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232 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
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233 | # endif |
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234 | # define PNG_DLL_EXPORT __export |
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235 | # else /* newer compiler */ |
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236 | # define PNG_DLL_EXPORT __declspec(dllexport) |
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237 | # ifndef PNG_DLL_IMPORT |
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238 | # define PNG_DLL_IMPORT __declspec(dllimport) |
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239 | # endif |
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240 | # endif /* compiler */ |
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241 | |
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242 | #else /* !Windows/x86 */ |
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243 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
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244 | # define PNGAPI _System |
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245 | # else /* !Windows/x86 && !OS/2 */ |
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246 | /* Use the defaults, or define PNG*API on the command line (but |
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247 | * this will have to be done for every compile!) |
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248 | */ |
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249 | # endif /* other system, !OS/2 */ |
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250 | #endif /* !Windows/x86 */ |
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251 | |
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252 | /* Now do all the defaulting . */ |
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253 | #ifndef PNGCAPI |
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254 | # define PNGCAPI |
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255 | #endif |
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256 | #ifndef PNGCBAPI |
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257 | # define PNGCBAPI PNGCAPI |
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258 | #endif |
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259 | #ifndef PNGAPI |
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260 | # define PNGAPI PNGCAPI |
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261 | #endif |
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262 | |
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263 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set) |
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264 | * then in an internal header file when building the library, otherwise (when |
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265 | * using the library) it is set here. |
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266 | */ |
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267 | #ifndef PNG_IMPEXP |
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268 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
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269 | /* This forces use of a DLL, disallowing static linking */ |
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270 | # define PNG_IMPEXP PNG_DLL_IMPORT |
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271 | # endif |
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272 | |
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273 | # ifndef PNG_IMPEXP |
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274 | # define PNG_IMPEXP |
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275 | # endif |
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276 | #endif |
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277 | |
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278 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat |
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279 | * 'attributes' as a storage class - the attributes go at the start of the |
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280 | * function definition, and attributes are always appended regardless of the |
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281 | * compiler. This considerably simplifies these macros but may cause problems |
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282 | * if any compilers both need function attributes and fail to handle them as |
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283 | * a storage class (this is unlikely.) |
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284 | */ |
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285 | #ifndef PNG_FUNCTION |
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286 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args |
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287 | #endif |
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288 | |
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289 | #ifndef PNG_EXPORT_TYPE |
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290 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
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291 | #endif |
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292 | |
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293 | /* The ordinal value is only relevant when preprocessing png.h for symbol |
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294 | * table entries, so we discard it here. See the .dfn files in the |
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295 | * scripts directory. |
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296 | */ |
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297 | #ifndef PNG_EXPORTA |
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298 | |
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299 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
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300 | PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ |
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301 | extern attributes) |
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302 | #endif |
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303 | |
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304 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, |
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305 | * so make something non-empty to satisfy the requirement: |
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306 | */ |
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307 | #define PNG_EMPTY /*empty list*/ |
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308 | |
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309 | #define PNG_EXPORT(ordinal, type, name, args)\ |
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310 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) |
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311 | |
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312 | /* Use PNG_REMOVED to comment out a removed interface. */ |
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313 | #ifndef PNG_REMOVED |
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314 | # define PNG_REMOVED(ordinal, type, name, args, attributes) |
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315 | #endif |
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316 | |
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317 | #ifndef PNG_CALLBACK |
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318 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) |
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319 | #endif |
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320 | |
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321 | /* Support for compiler specific function attributes. These are used |
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322 | * so that where compiler support is available incorrect use of API |
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323 | * functions in png.h will generate compiler warnings. |
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324 | * |
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325 | * Added at libpng-1.2.41. |
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326 | */ |
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327 | |
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328 | #ifndef PNG_NO_PEDANTIC_WARNINGS |
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329 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
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330 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED |
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331 | # endif |
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332 | #endif |
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333 | |
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334 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED |
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335 | /* Support for compiler specific function attributes. These are used |
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336 | * so that where compiler support is available incorrect use of API |
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337 | * functions in png.h will generate compiler warnings. Added at libpng |
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338 | * version 1.2.41. |
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339 | */ |
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340 | # if defined(__GNUC__) |
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341 | # ifndef PNG_USE_RESULT |
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342 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
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343 | # endif |
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344 | # ifndef PNG_NORETURN |
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345 | # define PNG_NORETURN __attribute__((__noreturn__)) |
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346 | # endif |
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347 | # ifndef PNG_ALLOCATED |
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348 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
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349 | # endif |
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350 | # ifndef PNG_DEPRECATED |
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351 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
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352 | # endif |
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353 | # ifndef PNG_PRIVATE |
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354 | # if 0 /* Doesn't work so we use deprecated instead*/ |
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355 | # define PNG_PRIVATE \ |
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356 | __attribute__((warning("This function is not exported by libpng."))) |
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357 | # else |
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358 | # define PNG_PRIVATE \ |
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359 | __attribute__((__deprecated__)) |
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360 | # endif |
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361 | # endif |
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362 | # endif /* __GNUC__ */ |
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363 | |
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364 | # if defined(_MSC_VER) && (_MSC_VER >= 1300) |
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365 | # ifndef PNG_USE_RESULT |
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366 | # define PNG_USE_RESULT /* not supported */ |
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367 | # endif |
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368 | # ifndef PNG_NORETURN |
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369 | # define PNG_NORETURN __declspec(noreturn) |
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370 | # endif |
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371 | # ifndef PNG_ALLOCATED |
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372 | # if (_MSC_VER >= 1400) |
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373 | # define PNG_ALLOCATED __declspec(restrict) |
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374 | # endif |
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375 | # endif |
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376 | # ifndef PNG_DEPRECATED |
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377 | # define PNG_DEPRECATED __declspec(deprecated) |
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378 | # endif |
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379 | # ifndef PNG_PRIVATE |
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380 | # define PNG_PRIVATE __declspec(deprecated) |
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381 | # endif |
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382 | # endif /* _MSC_VER */ |
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383 | #endif /* PNG_PEDANTIC_WARNINGS */ |
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384 | |
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385 | #ifndef PNG_DEPRECATED |
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386 | # define PNG_DEPRECATED /* Use of this function is deprecated */ |
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387 | #endif |
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388 | #ifndef PNG_USE_RESULT |
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389 | # define PNG_USE_RESULT /* The result of this function must be checked */ |
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390 | #endif |
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391 | #ifndef PNG_NORETURN |
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392 | # define PNG_NORETURN /* This function does not return */ |
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393 | #endif |
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394 | #ifndef PNG_ALLOCATED |
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395 | # define PNG_ALLOCATED /* The result of the function is new memory */ |
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396 | #endif |
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397 | #ifndef PNG_PRIVATE |
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398 | # define PNG_PRIVATE /* This is a private libpng function */ |
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399 | #endif |
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400 | #ifndef PNG_FP_EXPORT /* A floating point API. */ |
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401 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
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402 | # define PNG_FP_EXPORT(ordinal, type, name, args)\ |
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403 | PNG_EXPORT(ordinal, type, name, args) |
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404 | # else /* No floating point APIs */ |
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405 | # define PNG_FP_EXPORT(ordinal, type, name, args) |
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406 | # endif |
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407 | #endif |
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408 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
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409 | # ifdef PNG_FIXED_POINT_SUPPORTED |
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410 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
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411 | PNG_EXPORT(ordinal, type, name, args) |
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412 | # else /* No fixed point APIs */ |
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413 | # define PNG_FIXED_EXPORT(ordinal, type, name, args) |
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414 | # endif |
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415 | #endif |
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416 | |
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417 | /* The following uses const char * instead of char * for error |
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418 | * and warning message functions, so some compilers won't complain. |
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419 | * If you do not want to use const, define PNG_NO_CONST here. |
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420 | * |
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421 | * This should not change how the APIs are called, so it can be done |
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422 | * on a per-file basis in the application. |
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423 | */ |
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424 | #ifndef PNG_CONST |
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425 | # ifndef PNG_NO_CONST |
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426 | # define PNG_CONST const |
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427 | # else |
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428 | # define PNG_CONST |
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429 | # endif |
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430 | #endif |
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431 | |
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432 | /* Some typedefs to get us started. These should be safe on most of the |
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433 | * common platforms. The typedefs should be at least as large as the |
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434 | * numbers suggest (a png_uint_32 must be at least 32 bits long), but they |
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435 | * don't have to be exactly that size. Some compilers dislike passing |
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436 | * unsigned shorts as function parameters, so you may be better off using |
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437 | * unsigned int for png_uint_16. |
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438 | */ |
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439 | |
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440 | #if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) |
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441 | typedef unsigned int png_uint_32; |
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442 | typedef int png_int_32; |
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443 | #else |
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444 | typedef unsigned long png_uint_32; |
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445 | typedef long png_int_32; |
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446 | #endif |
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447 | typedef unsigned short png_uint_16; |
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448 | typedef short png_int_16; |
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449 | typedef unsigned char png_byte; |
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450 | |
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451 | #ifdef PNG_NO_SIZE_T |
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452 | typedef unsigned int png_size_t; |
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453 | #else |
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454 | typedef size_t png_size_t; |
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455 | #endif |
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456 | #define png_sizeof(x) (sizeof (x)) |
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457 | |
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458 | /* The following is needed for medium model support. It cannot be in the |
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459 | * pngpriv.h header. Needs modification for other compilers besides |
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460 | * MSC. Model independent support declares all arrays and pointers to be |
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461 | * large using the far keyword. The zlib version used must also support |
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462 | * model independent data. As of version zlib 1.0.4, the necessary changes |
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463 | * have been made in zlib. The USE_FAR_KEYWORD define triggers other |
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464 | * changes that are needed. (Tim Wegner) |
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465 | */ |
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466 | |
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467 | /* Separate compiler dependencies (problem here is that zlib.h always |
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468 | * defines FAR. (SJT) |
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469 | */ |
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470 | #ifdef __BORLANDC__ |
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471 | # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) |
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472 | # define LDATA 1 |
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473 | # else |
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474 | # define LDATA 0 |
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475 | # endif |
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476 | /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ |
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477 | # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) |
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478 | # define PNG_MAX_MALLOC_64K /* only used in build */ |
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479 | # if (LDATA != 1) |
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480 | # ifndef FAR |
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481 | # define FAR __far |
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482 | # endif |
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483 | # define USE_FAR_KEYWORD |
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484 | # endif /* LDATA != 1 */ |
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485 | /* Possibly useful for moving data out of default segment. |
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486 | * Uncomment it if you want. Could also define FARDATA as |
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487 | * const if your compiler supports it. (SJT) |
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488 | # define FARDATA FAR |
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489 | */ |
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490 | # endif /* __WIN32__, __FLAT__, __CYGWIN__ */ |
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491 | #endif /* __BORLANDC__ */ |
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492 | |
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493 | |
---|
494 | /* Suggest testing for specific compiler first before testing for |
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495 | * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, |
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496 | * making reliance oncertain keywords suspect. (SJT) |
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497 | */ |
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498 | |
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499 | /* MSC Medium model */ |
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500 | #ifdef FAR |
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501 | # ifdef M_I86MM |
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502 | # define USE_FAR_KEYWORD |
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503 | # define FARDATA FAR |
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504 | # include <dos.h> |
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505 | # endif |
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506 | #endif |
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507 | |
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508 | /* SJT: default case */ |
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509 | #ifndef FAR |
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510 | # define FAR |
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511 | #endif |
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512 | |
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513 | /* At this point FAR is always defined */ |
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514 | #ifndef FARDATA |
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515 | # define FARDATA |
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516 | #endif |
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517 | |
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518 | /* Typedef for floating-point numbers that are converted |
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519 | * to fixed-point with a multiple of 100,000, e.g., gamma |
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520 | */ |
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521 | typedef png_int_32 png_fixed_point; |
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522 | |
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523 | /* Add typedefs for pointers */ |
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524 | typedef void FAR * png_voidp; |
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525 | typedef PNG_CONST void FAR * png_const_voidp; |
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526 | typedef png_byte FAR * png_bytep; |
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527 | typedef PNG_CONST png_byte FAR * png_const_bytep; |
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528 | typedef png_uint_32 FAR * png_uint_32p; |
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529 | typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; |
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530 | typedef png_int_32 FAR * png_int_32p; |
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531 | typedef PNG_CONST png_int_32 FAR * png_const_int_32p; |
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532 | typedef png_uint_16 FAR * png_uint_16p; |
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533 | typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; |
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534 | typedef png_int_16 FAR * png_int_16p; |
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535 | typedef PNG_CONST png_int_16 FAR * png_const_int_16p; |
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536 | typedef char FAR * png_charp; |
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537 | typedef PNG_CONST char FAR * png_const_charp; |
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538 | typedef png_fixed_point FAR * png_fixed_point_p; |
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539 | typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; |
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540 | typedef png_size_t FAR * png_size_tp; |
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541 | typedef PNG_CONST png_size_t FAR * png_const_size_tp; |
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542 | |
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543 | #ifdef PNG_STDIO_SUPPORTED |
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544 | typedef FILE * png_FILE_p; |
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545 | #endif |
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546 | |
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547 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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548 | typedef double FAR * png_doublep; |
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549 | typedef PNG_CONST double FAR * png_const_doublep; |
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550 | #endif |
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551 | |
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552 | /* Pointers to pointers; i.e. arrays */ |
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553 | typedef png_byte FAR * FAR * png_bytepp; |
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554 | typedef png_uint_32 FAR * FAR * png_uint_32pp; |
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555 | typedef png_int_32 FAR * FAR * png_int_32pp; |
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556 | typedef png_uint_16 FAR * FAR * png_uint_16pp; |
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557 | typedef png_int_16 FAR * FAR * png_int_16pp; |
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558 | typedef PNG_CONST char FAR * FAR * png_const_charpp; |
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559 | typedef char FAR * FAR * png_charpp; |
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560 | typedef png_fixed_point FAR * FAR * png_fixed_point_pp; |
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561 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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562 | typedef double FAR * FAR * png_doublepp; |
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563 | #endif |
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564 | |
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565 | /* Pointers to pointers to pointers; i.e., pointer to array */ |
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566 | typedef char FAR * FAR * FAR * png_charppp; |
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567 | |
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568 | /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, |
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569 | * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 |
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570 | * to png_alloc_size_t are not necessary; in fact, it is recommended |
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571 | * not to use them at all so that the compiler can complain when something |
---|
572 | * turns out to be problematic. |
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573 | * Casts in the other direction (from png_alloc_size_t to png_size_t or |
---|
574 | * png_uint_32) should be explicitly applied; however, we do not expect |
---|
575 | * to encounter practical situations that require such conversions. |
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576 | */ |
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577 | #if defined(__TURBOC__) && !defined(__FLAT__) |
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578 | typedef unsigned long png_alloc_size_t; |
---|
579 | #else |
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580 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
---|
581 | typedef unsigned long png_alloc_size_t; |
---|
582 | # else |
---|
583 | /* This is an attempt to detect an old Windows system where (int) is |
---|
584 | * actually 16 bits, in that case png_malloc must have an argument with a |
---|
585 | * bigger size to accomodate the requirements of the library. |
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586 | */ |
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587 | # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ |
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588 | (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) |
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589 | typedef DWORD png_alloc_size_t; |
---|
590 | # else |
---|
591 | typedef png_size_t png_alloc_size_t; |
---|
592 | # endif |
---|
593 | # endif |
---|
594 | #endif |
---|
595 | |
---|
596 | #endif /* PNGCONF_H */ |
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