1 | |
2 | /* pngconf.h - machine configurable file for libpng |
3 | * |
4 | * libpng version 1.6.12 - June 12, 2014 |
5 | * |
6 | * Copyright (c) 1998-2014 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 | |
242 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
243 | |
244 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) |
245 | # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" |
246 | # endif |
247 | |
248 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ |
249 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
250 | /* older Borland and MSC |
251 | * compilers used '__export' and required this to be after |
252 | * the type. |
253 | */ |
254 | # ifndef PNG_EXPORT_TYPE |
255 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
256 | # endif |
257 | # define PNG_DLL_EXPORT __export |
258 | # else /* newer compiler */ |
259 | # define PNG_DLL_EXPORT __declspec(dllexport) |
260 | # ifndef PNG_DLL_IMPORT |
261 | # define PNG_DLL_IMPORT __declspec(dllimport) |
262 | # endif |
263 | # endif /* compiler */ |
264 | |
265 | #else /* !Windows */ |
266 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
267 | # define PNGAPI _System |
268 | # else /* !Windows/x86 && !OS/2 */ |
269 | /* Use the defaults, or define PNG*API on the command line (but |
270 | * this will have to be done for every compile!) |
271 | */ |
272 | # endif /* other system, !OS/2 */ |
273 | #endif /* !Windows/x86 */ |
274 | |
275 | /* Now do all the defaulting . */ |
276 | #ifndef PNGCAPI |
277 | # define PNGCAPI |
278 | #endif |
279 | #ifndef PNGCBAPI |
280 | # define PNGCBAPI PNGCAPI |
281 | #endif |
282 | #ifndef PNGAPI |
283 | # define PNGAPI PNGCAPI |
284 | #endif |
285 | |
286 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set) |
287 | * then in an internal header file when building the library, otherwise (when |
288 | * using the library) it is set here. |
289 | */ |
290 | #ifndef PNG_IMPEXP |
291 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
292 | /* This forces use of a DLL, disallowing static linking */ |
293 | # define PNG_IMPEXP PNG_DLL_IMPORT |
294 | # endif |
295 | |
296 | # ifndef PNG_IMPEXP |
297 | # define PNG_IMPEXP |
298 | # endif |
299 | #endif |
300 | |
301 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat |
302 | * 'attributes' as a storage class - the attributes go at the start of the |
303 | * function definition, and attributes are always appended regardless of the |
304 | * compiler. This considerably simplifies these macros but may cause problems |
305 | * if any compilers both need function attributes and fail to handle them as |
306 | * a storage class (this is unlikely.) |
307 | */ |
308 | #ifndef PNG_FUNCTION |
309 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args |
310 | #endif |
311 | |
312 | #ifndef PNG_EXPORT_TYPE |
313 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
314 | #endif |
315 | |
316 | /* The ordinal value is only relevant when preprocessing png.h for symbol |
317 | * table entries, so we discard it here. See the .dfn files in the |
318 | * scripts directory. |
319 | */ |
320 | #ifndef PNG_EXPORTA |
321 | |
322 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
323 | PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ |
324 | extern attributes) |
325 | #endif |
326 | |
327 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, |
328 | * so make something non-empty to satisfy the requirement: |
329 | */ |
330 | #define PNG_EMPTY /*empty list*/ |
331 | |
332 | #define PNG_EXPORT(ordinal, type, name, args)\ |
333 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) |
334 | |
335 | /* Use PNG_REMOVED to comment out a removed interface. */ |
336 | #ifndef PNG_REMOVED |
337 | # define PNG_REMOVED(ordinal, type, name, args, attributes) |
338 | #endif |
339 | |
340 | #ifndef PNG_CALLBACK |
341 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) |
342 | #endif |
343 | |
344 | /* Support for compiler specific function attributes. These are used |
345 | * so that where compiler support is available incorrect use of API |
346 | * functions in png.h will generate compiler warnings. |
347 | * |
348 | * Added at libpng-1.2.41. |
349 | */ |
350 | |
351 | #ifndef PNG_NO_PEDANTIC_WARNINGS |
352 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
353 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED |
354 | # endif |
355 | #endif |
356 | |
357 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED |
358 | /* Support for compiler specific function attributes. These are used |
359 | * so that where compiler support is available, incorrect use of API |
360 | * functions in png.h will generate compiler warnings. Added at libpng |
361 | * version 1.2.41. Disabling these removes the warnings but may also produce |
362 | * less efficient code. |
363 | */ |
364 | # if defined(__clang__) && defined(__has_attribute) |
365 | /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ |
366 | # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) |
367 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
368 | # endif |
369 | # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) |
370 | # define PNG_NORETURN __attribute__((__noreturn__)) |
371 | # endif |
372 | # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) |
373 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
374 | # endif |
375 | # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) |
376 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
377 | # endif |
378 | # if !defined(PNG_PRIVATE) |
379 | # ifdef __has_extension |
380 | # if __has_extension(attribute_unavailable_with_message) |
381 | # define PNG_PRIVATE __attribute__((__unavailable__(\ |
382 | "This function is not exported by libpng."))) |
383 | # endif |
384 | # endif |
385 | # endif |
386 | # ifndef PNG_RESTRICT |
387 | # define PNG_RESTRICT __restrict |
388 | # endif |
389 | |
390 | # elif defined(__GNUC__) |
391 | # ifndef PNG_USE_RESULT |
392 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
393 | # endif |
394 | # ifndef PNG_NORETURN |
395 | # define PNG_NORETURN __attribute__((__noreturn__)) |
396 | # endif |
397 | # if __GNUC__ >= 3 |
398 | # ifndef PNG_ALLOCATED |
399 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
400 | # endif |
401 | # ifndef PNG_DEPRECATED |
402 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
403 | # endif |
404 | # ifndef PNG_PRIVATE |
405 | # if 0 /* Doesn't work so we use deprecated instead*/ |
406 | # define PNG_PRIVATE \ |
407 | __attribute__((warning("This function is not exported by libpng."))) |
408 | # else |
409 | # define PNG_PRIVATE \ |
410 | __attribute__((__deprecated__)) |
411 | # endif |
412 | # endif |
413 | # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) |
414 | # ifndef PNG_RESTRICT |
415 | # define PNG_RESTRICT __restrict |
416 | # endif |
417 | # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ |
418 | # endif /* __GNUC__ >= 3 */ |
419 | |
420 | # elif defined(_MSC_VER) && (_MSC_VER >= 1300) |
421 | # ifndef PNG_USE_RESULT |
422 | # define PNG_USE_RESULT /* not supported */ |
423 | # endif |
424 | # ifndef PNG_NORETURN |
425 | # define PNG_NORETURN __declspec(noreturn) |
426 | # endif |
427 | # ifndef PNG_ALLOCATED |
428 | # if (_MSC_VER >= 1400) |
429 | # define PNG_ALLOCATED __declspec(restrict) |
430 | # endif |
431 | # endif |
432 | # ifndef PNG_DEPRECATED |
433 | # define PNG_DEPRECATED __declspec(deprecated) |
434 | # endif |
435 | # ifndef PNG_PRIVATE |
436 | # define PNG_PRIVATE __declspec(deprecated) |
437 | # endif |
438 | # ifndef PNG_RESTRICT |
439 | # if (_MSC_VER >= 1400) |
440 | # define PNG_RESTRICT __restrict |
441 | # endif |
442 | # endif |
443 | |
444 | # elif defined(__WATCOMC__) |
445 | # ifndef PNG_RESTRICT |
446 | # define PNG_RESTRICT __restrict |
447 | # endif |
448 | # endif |
449 | #endif /* PNG_PEDANTIC_WARNINGS */ |
450 | |
451 | #ifndef PNG_DEPRECATED |
452 | # define PNG_DEPRECATED /* Use of this function is deprecated */ |
453 | #endif |
454 | #ifndef PNG_USE_RESULT |
455 | # define PNG_USE_RESULT /* The result of this function must be checked */ |
456 | #endif |
457 | #ifndef PNG_NORETURN |
458 | # define PNG_NORETURN /* This function does not return */ |
459 | #endif |
460 | #ifndef PNG_ALLOCATED |
461 | # define PNG_ALLOCATED /* The result of the function is new memory */ |
462 | #endif |
463 | #ifndef PNG_PRIVATE |
464 | # define PNG_PRIVATE /* This is a private libpng function */ |
465 | #endif |
466 | #ifndef PNG_RESTRICT |
467 | # define PNG_RESTRICT /* The C99 "restrict" feature */ |
468 | #endif |
469 | |
470 | #ifndef PNG_FP_EXPORT /* A floating point API. */ |
471 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
472 | # define PNG_FP_EXPORT(ordinal, type, name, args)\ |
473 | PNG_EXPORT(ordinal, type, name, args); |
474 | # else /* No floating point APIs */ |
475 | # define PNG_FP_EXPORT(ordinal, type, name, args) |
476 | # endif |
477 | #endif |
478 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
479 | # ifdef PNG_FIXED_POINT_SUPPORTED |
480 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
481 | PNG_EXPORT(ordinal, type, name, args); |
482 | # else /* No fixed point APIs */ |
483 | # define PNG_FIXED_EXPORT(ordinal, type, name, args) |
484 | # endif |
485 | #endif |
486 | |
487 | #ifndef PNG_BUILDING_SYMBOL_TABLE |
488 | /* Some typedefs to get us started. These should be safe on most of the common |
489 | * platforms. |
490 | * |
491 | * png_uint_32 and png_int_32 may, currently, be larger than required to hold a |
492 | * 32-bit value however this is not normally advisable. |
493 | * |
494 | * png_uint_16 and png_int_16 should always be two bytes in size - this is |
495 | * verified at library build time. |
496 | * |
497 | * png_byte must always be one byte in size. |
498 | * |
499 | * The checks below use constants from limits.h, as defined by the ISOC90 |
500 | * standard. |
501 | */ |
502 | #if CHAR_BIT == 8 && UCHAR_MAX == 255 |
503 | typedef unsigned char png_byte; |
504 | #else |
505 | # error "libpng requires 8 bit bytes" |
506 | #endif |
507 | |
508 | #if INT_MIN == -32768 && INT_MAX == 32767 |
509 | typedef int png_int_16; |
510 | #elif SHRT_MIN == -32768 && SHRT_MAX == 32767 |
511 | typedef short png_int_16; |
512 | #else |
513 | # error "libpng requires a signed 16 bit type" |
514 | #endif |
515 | |
516 | #if UINT_MAX == 65535 |
517 | typedef unsigned int png_uint_16; |
518 | #elif USHRT_MAX == 65535 |
519 | typedef unsigned short png_uint_16; |
520 | #else |
521 | # error "libpng requires an unsigned 16 bit type" |
522 | #endif |
523 | |
524 | #if INT_MIN < -2147483646 && INT_MAX > 2147483646 |
525 | typedef int png_int_32; |
526 | #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 |
527 | typedef long int png_int_32; |
528 | #else |
529 | # error "libpng requires a signed 32 bit (or more) type" |
530 | #endif |
531 | |
532 | #if UINT_MAX > 4294967294 |
533 | typedef unsigned int png_uint_32; |
534 | #elif ULONG_MAX > 4294967294 |
535 | typedef unsigned long int png_uint_32; |
536 | #else |
537 | # error "libpng requires an unsigned 32 bit (or more) type" |
538 | #endif |
539 | |
540 | /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, |
541 | * requires an ISOC90 compiler and relies on consistent behavior of sizeof. |
542 | */ |
543 | typedef size_t png_size_t; |
544 | typedef ptrdiff_t png_ptrdiff_t; |
545 | |
546 | /* libpng needs to know the maximum value of 'size_t' and this controls the |
547 | * definition of png_alloc_size_t, below. This maximum value of size_t limits |
548 | * but does not control the maximum allocations the library makes - there is |
549 | * direct application control of this through png_set_user_limits(). |
550 | */ |
551 | #ifndef PNG_SMALL_SIZE_T |
552 | /* Compiler specific tests for systems where size_t is known to be less than |
553 | * 32 bits (some of these systems may no longer work because of the lack of |
554 | * 'far' support; see above.) |
555 | */ |
556 | # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ |
557 | (defined(_MSC_VER) && defined(MAXSEG_64K)) |
558 | # define PNG_SMALL_SIZE_T |
559 | # endif |
560 | #endif |
561 | |
562 | /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no |
563 | * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to |
564 | * png_alloc_size_t are not necessary; in fact, it is recommended not to use |
565 | * them at all so that the compiler can complain when something turns out to be |
566 | * problematic. |
567 | * |
568 | * Casts in the other direction (from png_alloc_size_t to png_size_t or |
569 | * png_uint_32) should be explicitly applied; however, we do not expect to |
570 | * encounter practical situations that require such conversions. |
571 | * |
572 | * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than |
573 | * 4294967295 - i.e. less than the maximum value of png_uint_32. |
574 | */ |
575 | #ifdef PNG_SMALL_SIZE_T |
576 | typedef png_uint_32 png_alloc_size_t; |
577 | #else |
578 | typedef png_size_t png_alloc_size_t; |
579 | #endif |
580 | |
581 | /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler |
582 | * implementations of Intel CPU specific support of user-mode segmented address |
583 | * spaces, where 16-bit pointers address more than 65536 bytes of memory using |
584 | * separate 'segment' registers. The implementation requires two different |
585 | * types of pointer (only one of which includes the segment value.) |
586 | * |
587 | * If required this support is available in version 1.2 of libpng and may be |
588 | * available in versions through 1.5, although the correctness of the code has |
589 | * not been verified recently. |
590 | */ |
591 | |
592 | /* Typedef for floating-point numbers that are converted to fixed-point with a |
593 | * multiple of 100,000, e.g., gamma |
594 | */ |
595 | typedef png_int_32 png_fixed_point; |
596 | |
597 | /* Add typedefs for pointers */ |
598 | typedef void * png_voidp; |
599 | typedef const void * png_const_voidp; |
600 | typedef png_byte * png_bytep; |
601 | typedef const png_byte * png_const_bytep; |
602 | typedef png_uint_32 * png_uint_32p; |
603 | typedef const png_uint_32 * png_const_uint_32p; |
604 | typedef png_int_32 * png_int_32p; |
605 | typedef const png_int_32 * png_const_int_32p; |
606 | typedef png_uint_16 * png_uint_16p; |
607 | typedef const png_uint_16 * png_const_uint_16p; |
608 | typedef png_int_16 * png_int_16p; |
609 | typedef const png_int_16 * png_const_int_16p; |
610 | typedef char * png_charp; |
611 | typedef const char * png_const_charp; |
612 | typedef png_fixed_point * png_fixed_point_p; |
613 | typedef const png_fixed_point * png_const_fixed_point_p; |
614 | typedef png_size_t * png_size_tp; |
615 | typedef const png_size_t * png_const_size_tp; |
616 | |
617 | #ifdef PNG_STDIO_SUPPORTED |
618 | typedef FILE * png_FILE_p; |
619 | #endif |
620 | |
621 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
622 | typedef double * png_doublep; |
623 | typedef const double * png_const_doublep; |
624 | #endif |
625 | |
626 | /* Pointers to pointers; i.e. arrays */ |
627 | typedef png_byte * * png_bytepp; |
628 | typedef png_uint_32 * * png_uint_32pp; |
629 | typedef png_int_32 * * png_int_32pp; |
630 | typedef png_uint_16 * * png_uint_16pp; |
631 | typedef png_int_16 * * png_int_16pp; |
632 | typedef const char * * png_const_charpp; |
633 | typedef char * * png_charpp; |
634 | typedef png_fixed_point * * png_fixed_point_pp; |
635 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
636 | typedef double * * png_doublepp; |
637 | #endif |
638 | |
639 | /* Pointers to pointers to pointers; i.e., pointer to array */ |
640 | typedef char * * * png_charppp; |
641 | |
642 | #endif /* PNG_BUILDING_SYMBOL_TABLE */ |
643 | |
644 | #endif /* PNGCONF_H */ |
645 | |