| | 1 | |
| | 2 | /* pngconf.h - machine configurable file for libpng |
| | 3 | * |
| | 4 | * libpng version 1.6.2 - April 25, 2013 |
| | 5 | * |
| | 6 | * Copyright (c) 1998-2013 Glenn Randers-Pehrson |
| | 7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| | 8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
| | 9 | * |
| | 10 | * This code is released under the libpng license. |
| | 11 | * For conditions of distribution and use, see the disclaimer |
| | 12 | * and license in png.h |
| | 13 | * |
| | 14 | */ |
| | 15 | |
| | 16 | /* Any machine specific code is near the front of this file, so if you |
| | 17 | * are configuring libpng for a machine, you may want to read the section |
| | 18 | * starting here down to where it starts to typedef png_color, png_text, |
| | 19 | * and png_info. |
| | 20 | */ |
| | 21 | |
| | 22 | #ifndef PNGCONF_H |
| | 23 | #define PNGCONF_H |
| | 24 | |
| | 25 | /* To do: Do all of this in scripts/pnglibconf.dfa */ |
| | 26 | #ifdef PNG_SAFE_LIMITS_SUPPORTED |
| | 27 | # ifdef PNG_USER_WIDTH_MAX |
| | 28 | # undef PNG_USER_WIDTH_MAX |
| | 29 | # define PNG_USER_WIDTH_MAX 1000000L |
| | 30 | # endif |
| | 31 | # ifdef PNG_USER_HEIGHT_MAX |
| | 32 | # undef PNG_USER_HEIGHT_MAX |
| | 33 | # define PNG_USER_HEIGHT_MAX 1000000L |
| | 34 | # endif |
| | 35 | # ifdef PNG_USER_CHUNK_MALLOC_MAX |
| | 36 | # undef PNG_USER_CHUNK_MALLOC_MAX |
| | 37 | # define PNG_USER_CHUNK_MALLOC_MAX 4000000L |
| | 38 | # endif |
| | 39 | # ifdef PNG_USER_CHUNK_CACHE_MAX |
| | 40 | # undef PNG_USER_CHUNK_CACHE_MAX |
| | 41 | # define PNG_USER_CHUNK_CACHE_MAX 128 |
| | 42 | # endif |
| | 43 | #endif |
| | 44 | |
| | 45 | #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ |
| | 46 | |
| | 47 | /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C |
| | 48 | * compiler for correct compilation. The following header files are required by |
| | 49 | * the standard. If your compiler doesn't provide these header files, or they |
| | 50 | * do not match the standard, you will need to provide/improve them. |
| | 51 | */ |
| | 52 | #include <limits.h> |
| | 53 | #include <stddef.h> |
| | 54 | |
| | 55 | /* Library header files. These header files are all defined by ISOC90; libpng |
| | 56 | * expects conformant implementations, however, an ISOC90 conformant system need |
| | 57 | * not provide these header files if the functionality cannot be implemented. |
| | 58 | * In this case it will be necessary to disable the relevant parts of libpng in |
| | 59 | * the build of pnglibconf.h. |
| | 60 | * |
| | 61 | * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not |
| | 62 | * include this unnecessary header file. |
| | 63 | */ |
| | 64 | |
| | 65 | #ifdef PNG_STDIO_SUPPORTED |
| | 66 | /* Required for the definition of FILE: */ |
| | 67 | # include <stdio.h> |
| | 68 | #endif |
| | 69 | |
| | 70 | #ifdef PNG_SETJMP_SUPPORTED |
| | 71 | /* Required for the definition of jmp_buf and the declaration of longjmp: */ |
| | 72 | # include <setjmp.h> |
| | 73 | #endif |
| | 74 | |
| | 75 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
| | 76 | /* Required for struct tm: */ |
| | 77 | # include <time.h> |
| | 78 | #endif |
| | 79 | |
| | 80 | #endif /* PNG_BUILDING_SYMBOL_TABLE */ |
| | 81 | |
| | 82 | /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using |
| | 83 | * PNG_NO_CONST; this is no longer supported except for data declarations which |
| | 84 | * apparently still cause problems in 2011 on some compilers. |
| | 85 | */ |
| | 86 | #define PNG_CONST const /* backward compatibility only */ |
| | 87 | |
| | 88 | /* This controls optimization of the reading of 16 and 32 bit values |
| | 89 | * from PNG files. It can be set on a per-app-file basis - it |
| | 90 | * just changes whether a macro is used when the function is called. |
| | 91 | * The library builder sets the default; if read functions are not |
| | 92 | * built into the library the macro implementation is forced on. |
| | 93 | */ |
| | 94 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED |
| | 95 | # define PNG_USE_READ_MACROS |
| | 96 | #endif |
| | 97 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) |
| | 98 | # if PNG_DEFAULT_READ_MACROS |
| | 99 | # define PNG_USE_READ_MACROS |
| | 100 | # endif |
| | 101 | #endif |
| | 102 | |
| | 103 | /* COMPILER SPECIFIC OPTIONS. |
| | 104 | * |
| | 105 | * These options are provided so that a variety of difficult compilers |
| | 106 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE |
| | 107 | * below) but still have compiler specific implementations, others |
| | 108 | * may be changed on a per-file basis when compiling against libpng. |
| | 109 | */ |
| | 110 | |
| | 111 | /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect |
| | 112 | * against legacy (pre ISOC90) compilers that did not understand function |
| | 113 | * prototypes. It is not required for modern C compilers. |
| | 114 | */ |
| | 115 | #ifndef PNGARG |
| | 116 | # define PNGARG(arglist) arglist |
| | 117 | #endif |
| | 118 | |
| | 119 | /* Function calling conventions. |
| | 120 | * ============================= |
| | 121 | * Normally it is not necessary to specify to the compiler how to call |
| | 122 | * a function - it just does it - however on x86 systems derived from |
| | 123 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems |
| | 124 | * and some others) there are multiple ways to call a function and the |
| | 125 | * default can be changed on the compiler command line. For this reason |
| | 126 | * libpng specifies the calling convention of every exported function and |
| | 127 | * every function called via a user supplied function pointer. This is |
| | 128 | * done in this file by defining the following macros: |
| | 129 | * |
| | 130 | * PNGAPI Calling convention for exported functions. |
| | 131 | * PNGCBAPI Calling convention for user provided (callback) functions. |
| | 132 | * PNGCAPI Calling convention used by the ANSI-C library (required |
| | 133 | * for longjmp callbacks and sometimes used internally to |
| | 134 | * specify the calling convention for zlib). |
| | 135 | * |
| | 136 | * These macros should never be overridden. If it is necessary to |
| | 137 | * change calling convention in a private build this can be done |
| | 138 | * by setting PNG_API_RULE (which defaults to 0) to one of the values |
| | 139 | * below to select the correct 'API' variants. |
| | 140 | * |
| | 141 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. |
| | 142 | * This is correct in every known environment. |
| | 143 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and |
| | 144 | * the 'C' calling convention (from PNGCAPI) for |
| | 145 | * callbacks (PNGCBAPI). This is no longer required |
| | 146 | * in any known environment - if it has to be used |
| | 147 | * please post an explanation of the problem to the |
| | 148 | * libpng mailing list. |
| | 149 | * |
| | 150 | * These cases only differ if the operating system does not use the C |
| | 151 | * calling convention, at present this just means the above cases |
| | 152 | * (x86 DOS/Windows sytems) and, even then, this does not apply to |
| | 153 | * Cygwin running on those systems. |
| | 154 | * |
| | 155 | * Note that the value must be defined in pnglibconf.h so that what |
| | 156 | * the application uses to call the library matches the conventions |
| | 157 | * set when building the library. |
| | 158 | */ |
| | 159 | |
| | 160 | /* Symbol export |
| | 161 | * ============= |
| | 162 | * When building a shared library it is almost always necessary to tell |
| | 163 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' |
| | 164 | * is used to mark the symbols. On some systems these symbols can be |
| | 165 | * extracted at link time and need no special processing by the compiler, |
| | 166 | * on other systems the symbols are flagged by the compiler and just |
| | 167 | * the declaration requires a special tag applied (unfortunately) in a |
| | 168 | * compiler dependent way. Some systems can do either. |
| | 169 | * |
| | 170 | * A small number of older systems also require a symbol from a DLL to |
| | 171 | * be flagged to the program that calls it. This is a problem because |
| | 172 | * we do not know in the header file included by application code that |
| | 173 | * the symbol will come from a shared library, as opposed to a statically |
| | 174 | * linked one. For this reason the application must tell us by setting |
| | 175 | * the magic flag PNG_USE_DLL to turn on the special processing before |
| | 176 | * it includes png.h. |
| | 177 | * |
| | 178 | * Four additional macros are used to make this happen: |
| | 179 | * |
| | 180 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from |
| | 181 | * the build or imported if PNG_USE_DLL is set - compiler |
| | 182 | * and system specific. |
| | 183 | * |
| | 184 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to |
| | 185 | * 'type', compiler specific. |
| | 186 | * |
| | 187 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to |
| | 188 | * make a symbol exported from the DLL. Not used in the |
| | 189 | * public header files; see pngpriv.h for how it is used |
| | 190 | * in the libpng build. |
| | 191 | * |
| | 192 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come |
| | 193 | * from a DLL - used to define PNG_IMPEXP when |
| | 194 | * PNG_USE_DLL is set. |
| | 195 | */ |
| | 196 | |
| | 197 | /* System specific discovery. |
| | 198 | * ========================== |
| | 199 | * This code is used at build time to find PNG_IMPEXP, the API settings |
| | 200 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL |
| | 201 | * import processing is possible. On Windows systems it also sets |
| | 202 | * compiler-specific macros to the values required to change the calling |
| | 203 | * conventions of the various functions. |
| | 204 | */ |
| | 205 | #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ |
| | 206 | defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) |
| | 207 | /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or |
| | 208 | * MinGW on any architecture currently supported by Windows. Also includes |
| | 209 | * Watcom builds but these need special treatment because they are not |
| | 210 | * compatible with GCC or Visual C because of different calling conventions. |
| | 211 | */ |
| | 212 | # if PNG_API_RULE == 2 |
| | 213 | /* If this line results in an error, either because __watcall is not |
| | 214 | * understood or because of a redefine just below you cannot use *this* |
| | 215 | * build of the library with the compiler you are using. *This* build was |
| | 216 | * build using Watcom and applications must also be built using Watcom! |
| | 217 | */ |
| | 218 | # define PNGCAPI __watcall |
| | 219 | # endif |
| | 220 | |
| | 221 | # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800)) |
| | 222 | # define PNGCAPI __cdecl |
| | 223 | # if PNG_API_RULE == 1 |
| | 224 | /* If this line results in an error __stdcall is not understood and |
| | 225 | * PNG_API_RULE should not have been set to '1'. |
| | 226 | */ |
| | 227 | # define PNGAPI __stdcall |
| | 228 | # endif |
| | 229 | # else |
| | 230 | /* An older compiler, or one not detected (erroneously) above, |
| | 231 | * if necessary override on the command line to get the correct |
| | 232 | * variants for the compiler. |
| | 233 | */ |
| | 234 | # ifndef PNGCAPI |
| | 235 | # define PNGCAPI _cdecl |
| | 236 | # endif |
| | 237 | # if PNG_API_RULE == 1 && !defined(PNGAPI) |
| | 238 | # define PNGAPI _stdcall |
| | 239 | # endif |
| | 240 | # endif /* compiler/api */ |
| | 241 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
| | 242 | |
| | 243 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) |
| | 244 | # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" |
| | 245 | # endif |
| | 246 | |
| | 247 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ |
| | 248 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
| | 249 | /* older Borland and MSC |
| | 250 | * compilers used '__export' and required this to be after |
| | 251 | * the type. |
| | 252 | */ |
| | 253 | # ifndef PNG_EXPORT_TYPE |
| | 254 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
| | 255 | # endif |
| | 256 | # define PNG_DLL_EXPORT __export |
| | 257 | # else /* newer compiler */ |
| | 258 | # define PNG_DLL_EXPORT __declspec(dllexport) |
| | 259 | # ifndef PNG_DLL_IMPORT |
| | 260 | # define PNG_DLL_IMPORT __declspec(dllimport) |
| | 261 | # endif |
| | 262 | # endif /* compiler */ |
| | 263 | |
| | 264 | #else /* !Windows */ |
| | 265 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
| | 266 | # define PNGAPI _System |
| | 267 | # else /* !Windows/x86 && !OS/2 */ |
| | 268 | /* Use the defaults, or define PNG*API on the command line (but |
| | 269 | * this will have to be done for every compile!) |
| | 270 | */ |
| | 271 | # endif /* other system, !OS/2 */ |
| | 272 | #endif /* !Windows/x86 */ |
| | 273 | |
| | 274 | /* Now do all the defaulting . */ |
| | 275 | #ifndef PNGCAPI |
| | 276 | # define PNGCAPI |
| | 277 | #endif |
| | 278 | #ifndef PNGCBAPI |
| | 279 | # define PNGCBAPI PNGCAPI |
| | 280 | #endif |
| | 281 | #ifndef PNGAPI |
| | 282 | # define PNGAPI PNGCAPI |
| | 283 | #endif |
| | 284 | |
| | 285 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set) |
| | 286 | * then in an internal header file when building the library, otherwise (when |
| | 287 | * using the library) it is set here. |
| | 288 | */ |
| | 289 | #ifndef PNG_IMPEXP |
| | 290 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
| | 291 | /* This forces use of a DLL, disallowing static linking */ |
| | 292 | # define PNG_IMPEXP PNG_DLL_IMPORT |
| | 293 | # endif |
| | 294 | |
| | 295 | # ifndef PNG_IMPEXP |
| | 296 | # define PNG_IMPEXP |
| | 297 | # endif |
| | 298 | #endif |
| | 299 | |
| | 300 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat |
| | 301 | * 'attributes' as a storage class - the attributes go at the start of the |
| | 302 | * function definition, and attributes are always appended regardless of the |
| | 303 | * compiler. This considerably simplifies these macros but may cause problems |
| | 304 | * if any compilers both need function attributes and fail to handle them as |
| | 305 | * a storage class (this is unlikely.) |
| | 306 | */ |
| | 307 | #ifndef PNG_FUNCTION |
| | 308 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args |
| | 309 | #endif |
| | 310 | |
| | 311 | #ifndef PNG_EXPORT_TYPE |
| | 312 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
| | 313 | #endif |
| | 314 | |
| | 315 | /* The ordinal value is only relevant when preprocessing png.h for symbol |
| | 316 | * table entries, so we discard it here. See the .dfn files in the |
| | 317 | * scripts directory. |
| | 318 | */ |
| | 319 | #ifndef PNG_EXPORTA |
| | 320 | |
| | 321 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
| | 322 | PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ |
| | 323 | extern attributes) |
| | 324 | #endif |
| | 325 | |
| | 326 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, |
| | 327 | * so make something non-empty to satisfy the requirement: |
| | 328 | */ |
| | 329 | #define PNG_EMPTY /*empty list*/ |
| | 330 | |
| | 331 | #define PNG_EXPORT(ordinal, type, name, args)\ |
| | 332 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) |
| | 333 | |
| | 334 | /* Use PNG_REMOVED to comment out a removed interface. */ |
| | 335 | #ifndef PNG_REMOVED |
| | 336 | # define PNG_REMOVED(ordinal, type, name, args, attributes) |
| | 337 | #endif |
| | 338 | |
| | 339 | #ifndef PNG_CALLBACK |
| | 340 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) |
| | 341 | #endif |
| | 342 | |
| | 343 | /* Support for compiler specific function attributes. These are used |
| | 344 | * so that where compiler support is available incorrect use of API |
| | 345 | * functions in png.h will generate compiler warnings. |
| | 346 | * |
| | 347 | * Added at libpng-1.2.41. |
| | 348 | */ |
| | 349 | |
| | 350 | #ifndef PNG_NO_PEDANTIC_WARNINGS |
| | 351 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
| | 352 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED |
| | 353 | # endif |
| | 354 | #endif |
| | 355 | |
| | 356 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED |
| | 357 | /* Support for compiler specific function attributes. These are used |
| | 358 | * so that where compiler support is available, incorrect use of API |
| | 359 | * functions in png.h will generate compiler warnings. Added at libpng |
| | 360 | * version 1.2.41. Disabling these removes the warnings but may also produce |
| | 361 | * less efficient code. |
| | 362 | */ |
| | 363 | # if defined(__GNUC__) |
| | 364 | # ifndef PNG_USE_RESULT |
| | 365 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
| | 366 | # endif |
| | 367 | # ifndef PNG_NORETURN |
| | 368 | # define PNG_NORETURN __attribute__((__noreturn__)) |
| | 369 | # endif |
| | 370 | # if __GNUC__ >= 3 |
| | 371 | # ifndef PNG_ALLOCATED |
| | 372 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
| | 373 | # endif |
| | 374 | # ifndef PNG_DEPRECATED |
| | 375 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
| | 376 | # endif |
| | 377 | # ifndef PNG_PRIVATE |
| | 378 | # if 0 /* Doesn't work so we use deprecated instead*/ |
| | 379 | # define PNG_PRIVATE \ |
| | 380 | __attribute__((warning("This function is not exported by libpng."))) |
| | 381 | # else |
| | 382 | # define PNG_PRIVATE \ |
| | 383 | __attribute__((__deprecated__)) |
| | 384 | # endif |
| | 385 | # endif |
| | 386 | # if ((__GNUC__ != 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) |
| | 387 | # ifndef PNG_RESTRICT |
| | 388 | # define PNG_RESTRICT __restrict |
| | 389 | # endif |
| | 390 | # endif /* __GNUC__ == 3.0 */ |
| | 391 | # endif /* __GNUC__ >= 3 */ |
| | 392 | |
| | 393 | # elif defined(_MSC_VER) && (_MSC_VER >= 1300) |
| | 394 | # ifndef PNG_USE_RESULT |
| | 395 | # define PNG_USE_RESULT /* not supported */ |
| | 396 | # endif |
| | 397 | # ifndef PNG_NORETURN |
| | 398 | # define PNG_NORETURN __declspec(noreturn) |
| | 399 | # endif |
| | 400 | # ifndef PNG_ALLOCATED |
| | 401 | # if (_MSC_VER >= 1400) |
| | 402 | # define PNG_ALLOCATED __declspec(restrict) |
| | 403 | # endif |
| | 404 | # endif |
| | 405 | # ifndef PNG_DEPRECATED |
| | 406 | # define PNG_DEPRECATED __declspec(deprecated) |
| | 407 | # endif |
| | 408 | # ifndef PNG_PRIVATE |
| | 409 | # define PNG_PRIVATE __declspec(deprecated) |
| | 410 | # endif |
| | 411 | # ifndef PNG_RESTRICT |
| | 412 | # if (_MSC_VER >= 1400) |
| | 413 | # define PNG_RESTRICT __restrict |
| | 414 | # endif |
| | 415 | # endif |
| | 416 | |
| | 417 | # elif defined(__WATCOMC__) |
| | 418 | # ifndef PNG_RESTRICT |
| | 419 | # define PNG_RESTRICT __restrict |
| | 420 | # endif |
| | 421 | # endif /* _MSC_VER */ |
| | 422 | #endif /* PNG_PEDANTIC_WARNINGS */ |
| | 423 | |
| | 424 | #ifndef PNG_DEPRECATED |
| | 425 | # define PNG_DEPRECATED /* Use of this function is deprecated */ |
| | 426 | #endif |
| | 427 | #ifndef PNG_USE_RESULT |
| | 428 | # define PNG_USE_RESULT /* The result of this function must be checked */ |
| | 429 | #endif |
| | 430 | #ifndef PNG_NORETURN |
| | 431 | # define PNG_NORETURN /* This function does not return */ |
| | 432 | #endif |
| | 433 | #ifndef PNG_ALLOCATED |
| | 434 | # define PNG_ALLOCATED /* The result of the function is new memory */ |
| | 435 | #endif |
| | 436 | #ifndef PNG_PRIVATE |
| | 437 | # define PNG_PRIVATE /* This is a private libpng function */ |
| | 438 | #endif |
| | 439 | #ifndef PNG_RESTRICT |
| | 440 | # define PNG_RESTRICT /* The C99 "restrict" feature */ |
| | 441 | #endif |
| | 442 | #ifndef PNG_FP_EXPORT /* A floating point API. */ |
| | 443 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
| | 444 | # define PNG_FP_EXPORT(ordinal, type, name, args)\ |
| | 445 | PNG_EXPORT(ordinal, type, name, args); |
| | 446 | # else /* No floating point APIs */ |
| | 447 | # define PNG_FP_EXPORT(ordinal, type, name, args) |
| | 448 | # endif |
| | 449 | #endif |
| | 450 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
| | 451 | # ifdef PNG_FIXED_POINT_SUPPORTED |
| | 452 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
| | 453 | PNG_EXPORT(ordinal, type, name, args); |
| | 454 | # else /* No fixed point APIs */ |
| | 455 | # define PNG_FIXED_EXPORT(ordinal, type, name, args) |
| | 456 | # endif |
| | 457 | #endif |
| | 458 | |
| | 459 | #ifndef PNG_BUILDING_SYMBOL_TABLE |
| | 460 | /* Some typedefs to get us started. These should be safe on most of the common |
| | 461 | * platforms. |
| | 462 | * |
| | 463 | * png_uint_32 and png_int_32 may, currently, be larger than required to hold a |
| | 464 | * 32-bit value however this is not normally advisable. |
| | 465 | * |
| | 466 | * png_uint_16 and png_int_16 should always be two bytes in size - this is |
| | 467 | * verified at library build time. |
| | 468 | * |
| | 469 | * png_byte must always be one byte in size. |
| | 470 | * |
| | 471 | * The checks below use constants from limits.h, as defined by the ISOC90 |
| | 472 | * standard. |
| | 473 | */ |
| | 474 | #if CHAR_BIT == 8 && UCHAR_MAX == 255 |
| | 475 | typedef unsigned char png_byte; |
| | 476 | #else |
| | 477 | # error "libpng requires 8 bit bytes" |
| | 478 | #endif |
| | 479 | |
| | 480 | #if INT_MIN == -32768 && INT_MAX == 32767 |
| | 481 | typedef int png_int_16; |
| | 482 | #elif SHRT_MIN == -32768 && SHRT_MAX == 32767 |
| | 483 | typedef short png_int_16; |
| | 484 | #else |
| | 485 | # error "libpng requires a signed 16 bit type" |
| | 486 | #endif |
| | 487 | |
| | 488 | #if UINT_MAX == 65535 |
| | 489 | typedef unsigned int png_uint_16; |
| | 490 | #elif USHRT_MAX == 65535 |
| | 491 | typedef unsigned short png_uint_16; |
| | 492 | #else |
| | 493 | # error "libpng requires an unsigned 16 bit type" |
| | 494 | #endif |
| | 495 | |
| | 496 | #if INT_MIN < -2147483646 && INT_MAX > 2147483646 |
| | 497 | typedef int png_int_32; |
| | 498 | #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 |
| | 499 | typedef long int png_int_32; |
| | 500 | #else |
| | 501 | # error "libpng requires a signed 32 bit (or more) type" |
| | 502 | #endif |
| | 503 | |
| | 504 | #if UINT_MAX > 4294967294 |
| | 505 | typedef unsigned int png_uint_32; |
| | 506 | #elif ULONG_MAX > 4294967294 |
| | 507 | typedef unsigned long int png_uint_32; |
| | 508 | #else |
| | 509 | # error "libpng requires an unsigned 32 bit (or more) type" |
| | 510 | #endif |
| | 511 | |
| | 512 | /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, |
| | 513 | * requires an ISOC90 compiler and relies on consistent behavior of sizeof. |
| | 514 | */ |
| | 515 | typedef size_t png_size_t; |
| | 516 | typedef ptrdiff_t png_ptrdiff_t; |
| | 517 | |
| | 518 | /* libpng needs to know the maximum value of 'size_t' and this controls the |
| | 519 | * definition of png_alloc_size_t, below. This maximum value of size_t limits |
| | 520 | * but does not control the maximum allocations the library makes - there is |
| | 521 | * direct application control of this through png_set_user_limits(). |
| | 522 | */ |
| | 523 | #ifndef PNG_SMALL_SIZE_T |
| | 524 | /* Compiler specific tests for systems where size_t is known to be less than |
| | 525 | * 32 bits (some of these systems may no longer work because of the lack of |
| | 526 | * 'far' support; see above.) |
| | 527 | */ |
| | 528 | # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ |
| | 529 | (defined(_MSC_VER) && defined(MAXSEG_64K)) |
| | 530 | # define PNG_SMALL_SIZE_T |
| | 531 | # endif |
| | 532 | #endif |
| | 533 | |
| | 534 | /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no |
| | 535 | * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to |
| | 536 | * png_alloc_size_t are not necessary; in fact, it is recommended not to use |
| | 537 | * them at all so that the compiler can complain when something turns out to be |
| | 538 | * problematic. |
| | 539 | * |
| | 540 | * Casts in the other direction (from png_alloc_size_t to png_size_t or |
| | 541 | * png_uint_32) should be explicitly applied; however, we do not expect to |
| | 542 | * encounter practical situations that require such conversions. |
| | 543 | * |
| | 544 | * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than |
| | 545 | * 4294967295 - i.e. less than the maximum value of png_uint_32. |
| | 546 | */ |
| | 547 | #ifdef PNG_SMALL_SIZE_T |
| | 548 | typedef png_uint_32 png_alloc_size_t; |
| | 549 | #else |
| | 550 | typedef png_size_t png_alloc_size_t; |
| | 551 | #endif |
| | 552 | |
| | 553 | /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler |
| | 554 | * implementations of Intel CPU specific support of user-mode segmented address |
| | 555 | * spaces, where 16-bit pointers address more than 65536 bytes of memory using |
| | 556 | * separate 'segment' registers. The implementation requires two different |
| | 557 | * types of pointer (only one of which includes the segment value.) |
| | 558 | * |
| | 559 | * If required this support is available in version 1.2 of libpng and may be |
| | 560 | * available in versions through 1.5, although the correctness of the code has |
| | 561 | * not been verified recently. |
| | 562 | */ |
| | 563 | |
| | 564 | /* Typedef for floating-point numbers that are converted to fixed-point with a |
| | 565 | * multiple of 100,000, e.g., gamma |
| | 566 | */ |
| | 567 | typedef png_int_32 png_fixed_point; |
| | 568 | |
| | 569 | /* Add typedefs for pointers */ |
| | 570 | typedef void * png_voidp; |
| | 571 | typedef const void * png_const_voidp; |
| | 572 | typedef png_byte * png_bytep; |
| | 573 | typedef const png_byte * png_const_bytep; |
| | 574 | typedef png_uint_32 * png_uint_32p; |
| | 575 | typedef const png_uint_32 * png_const_uint_32p; |
| | 576 | typedef png_int_32 * png_int_32p; |
| | 577 | typedef const png_int_32 * png_const_int_32p; |
| | 578 | typedef png_uint_16 * png_uint_16p; |
| | 579 | typedef const png_uint_16 * png_const_uint_16p; |
| | 580 | typedef png_int_16 * png_int_16p; |
| | 581 | typedef const png_int_16 * png_const_int_16p; |
| | 582 | typedef char * png_charp; |
| | 583 | typedef const char * png_const_charp; |
| | 584 | typedef png_fixed_point * png_fixed_point_p; |
| | 585 | typedef const png_fixed_point * png_const_fixed_point_p; |
| | 586 | typedef png_size_t * png_size_tp; |
| | 587 | typedef const png_size_t * png_const_size_tp; |
| | 588 | |
| | 589 | #ifdef PNG_STDIO_SUPPORTED |
| | 590 | typedef FILE * png_FILE_p; |
| | 591 | #endif |
| | 592 | |
| | 593 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
| | 594 | typedef double * png_doublep; |
| | 595 | typedef const double * png_const_doublep; |
| | 596 | #endif |
| | 597 | |
| | 598 | /* Pointers to pointers; i.e. arrays */ |
| | 599 | typedef png_byte * * png_bytepp; |
| | 600 | typedef png_uint_32 * * png_uint_32pp; |
| | 601 | typedef png_int_32 * * png_int_32pp; |
| | 602 | typedef png_uint_16 * * png_uint_16pp; |
| | 603 | typedef png_int_16 * * png_int_16pp; |
| | 604 | typedef const char * * png_const_charpp; |
| | 605 | typedef char * * png_charpp; |
| | 606 | typedef png_fixed_point * * png_fixed_point_pp; |
| | 607 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
| | 608 | typedef double * * png_doublepp; |
| | 609 | #endif |
| | 610 | |
| | 611 | /* Pointers to pointers to pointers; i.e., pointer to array */ |
| | 612 | typedef char * * * png_charppp; |
| | 613 | |
| | 614 | #endif /* PNG_BUILDING_SYMBOL_TABLE */ |
| | 615 | |
| | 616 | #endif /* PNGCONF_H */ |
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