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1 
2 /* pngconf.h - machine configurable file for libpng
3  *
4  * libpng version 1.5.13 - September 27, 2012
5  *
6  * Copyright (c) 1998-2012 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 #ifndef PNG_BUILDING_SYMBOL_TABLE
26 /* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
27  * definition file for  machine specific limits, this may impact the
28  * correctness of the definitions below (see uses of INT_MAX).
29  */
30 #  ifndef PNG_NO_LIMITS_H
31 #    include <limits.h>
32 #  endif
33 
34 /* For the memory copy APIs (i.e. the standard definitions of these),
35  * because this file defines png_memcpy and so on the base APIs must
36  * be defined here.
37  */
38 #  ifdef BSD
39 #    include <strings.h>
40 #  else
41 #    include <string.h>
42 #  endif
43 
44 /* For png_FILE_p - this provides the standard definition of a
45  * FILE
46  */
47 #  ifdef PNG_STDIO_SUPPORTED
48 #    include <stdio.h>
49 #  endif
50 #endif
51 
52 /* This controls optimization of the reading of 16 and 32 bit values
53  * from PNG files.  It can be set on a per-app-file basis - it
54  * just changes whether a macro is used when the function is called.
55  * The library builder sets the default; if read functions are not
56  * built into the library the macro implementation is forced on.
57  */
58 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
59 #  define PNG_USE_READ_MACROS
60 #endif
61 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
62 #  if PNG_DEFAULT_READ_MACROS
63 #    define PNG_USE_READ_MACROS
64 #  endif
65 #endif
66 
67 /* COMPILER SPECIFIC OPTIONS.
68  *
69  * These options are provided so that a variety of difficult compilers
70  * can be used.  Some are fixed at build time (e.g. PNG_API_RULE
71  * below) but still have compiler specific implementations, others
72  * may be changed on a per-file basis when compiling against libpng.
73  */
74 
75 /* The PNGARG macro protects us against machines that don't have function
76  * prototypes (ie K&R style headers).  If your compiler does not handle
77  * function prototypes, define this macro and use the included ansi2knr.
78  * I've always been able to use _NO_PROTO as the indicator, but you may
79  * need to drag the empty declaration out in front of here, or change the
80  * ifdef to suit your own needs.
81  */
82 #ifndef PNGARG
83 
84 #  ifdef OF /* zlib prototype munger */
85 #    define PNGARG(arglist) OF(arglist)
86 #  else
87 
88 #    ifdef _NO_PROTO
89 #      define PNGARG(arglist) ()
90 #    else
91 #      define PNGARG(arglist) arglist
92 #    endif /* _NO_PROTO */
93 
94 #  endif /* OF */
95 
96 #endif /* PNGARG */
97 
98 /* Function calling conventions.
99  * =============================
100  * Normally it is not necessary to specify to the compiler how to call
101  * a function - it just does it - however on x86 systems derived from
102  * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
103  * and some others) there are multiple ways to call a function and the
104  * default can be changed on the compiler command line.  For this reason
105  * libpng specifies the calling convention of every exported function and
106  * every function called via a user supplied function pointer.  This is
107  * done in this file by defining the following macros:
108  *
109  * PNGAPI    Calling convention for exported functions.
110  * PNGCBAPI  Calling convention for user provided (callback) functions.
111  * PNGCAPI   Calling convention used by the ANSI-C library (required
112  *           for longjmp callbacks and sometimes used internally to
113  *           specify the calling convention for zlib).
114  *
115  * These macros should never be overridden.  If it is necessary to
116  * change calling convention in a private build this can be done
117  * by setting PNG_API_RULE (which defaults to 0) to one of the values
118  * below to select the correct 'API' variants.
119  *
120  * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
121  *                This is correct in every known environment.
122  * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
123  *                the 'C' calling convention (from PNGCAPI) for
124  *                callbacks (PNGCBAPI).  This is no longer required
125  *                in any known environment - if it has to be used
126  *                please post an explanation of the problem to the
127  *                libpng mailing list.
128  *
129  * These cases only differ if the operating system does not use the C
130  * calling convention, at present this just means the above cases
131  * (x86 DOS/Windows sytems) and, even then, this does not apply to
132  * Cygwin running on those systems.
133  *
134  * Note that the value must be defined in pnglibconf.h so that what
135  * the application uses to call the library matches the conventions
136  * set when building the library.
137  */
138 
139 /* Symbol export
140  * =============
141  * When building a shared library it is almost always necessary to tell
142  * the compiler which symbols to export.  The png.h macro 'PNG_EXPORT'
143  * is used to mark the symbols.  On some systems these symbols can be
144  * extracted at link time and need no special processing by the compiler,
145  * on other systems the symbols are flagged by the compiler and just
146  * the declaration requires a special tag applied (unfortunately) in a
147  * compiler dependent way.  Some systems can do either.
148  *
149  * A small number of older systems also require a symbol from a DLL to
150  * be flagged to the program that calls it.  This is a problem because
151  * we do not know in the header file included by application code that
152  * the symbol will come from a shared library, as opposed to a statically
153  * linked one.  For this reason the application must tell us by setting
154  * the magic flag PNG_USE_DLL to turn on the special processing before
155  * it includes png.h.
156  *
157  * Four additional macros are used to make this happen:
158  *
159  * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
160  *            the build or imported if PNG_USE_DLL is set - compiler
161  *            and system specific.
162  *
163  * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
164  *                       'type', compiler specific.
165  *
166  * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
167  *                make a symbol exported from the DLL.  Not used in the
168  *                public header files; see pngpriv.h for how it is used
169  *                in the libpng build.
170  *
171  * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
172  *                from a DLL - used to define PNG_IMPEXP when
173  *                PNG_USE_DLL is set.
174  */
175 
176 /* System specific discovery.
177  * ==========================
178  * This code is used at build time to find PNG_IMPEXP, the API settings
179  * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
180  * import processing is possible.  On Windows/x86 systems it also sets
181  * compiler-specific macros to the values required to change the calling
182  * conventions of the various functions.
183  */
184 #if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
185       defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
186     ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
187       defined(_M_X64) || defined(_M_IA64) )
188   /* Windows system (DOS doesn't support DLLs) running on x86/x64.  Includes
189    * builds under Cygwin or MinGW.  Also includes Watcom builds but these need
190    * special treatment because they are not compatible with GCC or Visual C
191    * because of different calling conventions.
192    */
193 #  if PNG_API_RULE == 2
194     /* If this line results in an error, either because __watcall is not
195      * understood or because of a redefine just below you cannot use *this*
196      * build of the library with the compiler you are using.  *This* build was
197      * build using Watcom and applications must also be built using Watcom!
198      */
199 #    define PNGCAPI __watcall
200 #  endif
201 
202 #  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
203 #    define PNGCAPI __cdecl
204 #    if PNG_API_RULE == 1
205 #      define PNGAPI __stdcall
206 #    endif
207 #  else
208     /* An older compiler, or one not detected (erroneously) above,
209      * if necessary override on the command line to get the correct
210      * variants for the compiler.
211      */
212 #    ifndef PNGCAPI
213 #      define PNGCAPI _cdecl
214 #    endif
215 #    if PNG_API_RULE == 1 && !defined(PNGAPI)
216 #      define PNGAPI _stdcall
217 #    endif
218 #  endif /* compiler/api */
219   /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
220 
221 #  if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
222    ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
223 #  endif
224 
225 #  if (defined(_MSC_VER) && _MSC_VER < 800) ||\
226       (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
227     /* older Borland and MSC
228      * compilers used '__export' and required this to be after
229      * the type.
230      */
231 #    ifndef PNG_EXPORT_TYPE
232 #      define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
233 #    endif
234 #    define PNG_DLL_EXPORT __export
235 #  else /* newer compiler */
236 #    define PNG_DLL_EXPORT __declspec(dllexport)
237 #    ifndef PNG_DLL_IMPORT
238 #      define PNG_DLL_IMPORT __declspec(dllimport)
239 #    endif
240 #  endif /* compiler */
241 
242 #else /* !Windows/x86 */
243 #  if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
244 #    define PNGAPI _System
245 #  else /* !Windows/x86 && !OS/2 */
246     /* Use the defaults, or define PNG*API on the command line (but
247      * this will have to be done for every compile!)
248      */
249 #  endif /* other system, !OS/2 */
250 #endif /* !Windows/x86 */
251 
252 /* Now do all the defaulting . */
253 #ifndef PNGCAPI
254 #  define PNGCAPI
255 #endif
256 #ifndef PNGCBAPI
257 #  define PNGCBAPI PNGCAPI
258 #endif
259 #ifndef PNGAPI
260 #  define PNGAPI PNGCAPI
261 #endif
262 
263 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
264  * then in an internal header file when building the library, otherwise (when
265  * using the library) it is set here.
266  */
267 #ifndef PNG_IMPEXP
268 #  if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
269      /* This forces use of a DLL, disallowing static linking */
270 #    define PNG_IMPEXP PNG_DLL_IMPORT
271 #  endif
272 
273 #  ifndef PNG_IMPEXP
274 #    define PNG_IMPEXP
275 #  endif
276 #endif
277 
278 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
279  * 'attributes' as a storage class - the attributes go at the start of the
280  * function definition, and attributes are always appended regardless of the
281  * compiler.  This considerably simplifies these macros but may cause problems
282  * if any compilers both need function attributes and fail to handle them as
283  * a storage class (this is unlikely.)
284  */
285 #ifndef PNG_FUNCTION
286 #  define PNG_FUNCTION(type, name, args, attributes) attributes type name args
287 #endif
288 
289 #ifndef PNG_EXPORT_TYPE
290 #  define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
291 #endif
292 
293    /* The ordinal value is only relevant when preprocessing png.h for symbol
294     * table entries, so we discard it here.  See the .dfn files in the
295     * scripts directory.
296     */
297 #ifndef PNG_EXPORTA
298 
299 #  define PNG_EXPORTA(ordinal, type, name, args, attributes)\
300       PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
301         extern attributes)
302 #endif
303 
304 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
305  * so make something non-empty to satisfy the requirement:
306  */
307 #define PNG_EMPTY /*empty list*/
308 
309 #define PNG_EXPORT(ordinal, type, name, args)\
310    PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
311 
312 /* Use PNG_REMOVED to comment out a removed interface. */
313 #ifndef PNG_REMOVED
314 #  define PNG_REMOVED(ordinal, type, name, args, attributes)
315 #endif
316 
317 #ifndef PNG_CALLBACK
318 #  define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
319 #endif
320 
321 /* Support for compiler specific function attributes.  These are used
322  * so that where compiler support is available incorrect use of API
323  * functions in png.h will generate compiler warnings.
324  *
325  * Added at libpng-1.2.41.
326  */
327 
328 #ifndef PNG_NO_PEDANTIC_WARNINGS
329 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
330 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
331 #  endif
332 #endif
333 
334 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
335   /* Support for compiler specific function attributes.  These are used
336    * so that where compiler support is available incorrect use of API
337    * functions in png.h will generate compiler warnings.  Added at libpng
338    * version 1.2.41.
339    */
340 #  if defined(__GNUC__)
341 #    ifndef PNG_USE_RESULT
342 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
343 #    endif
344 #    ifndef PNG_NORETURN
345 #      define PNG_NORETURN   __attribute__((__noreturn__))
346 #    endif
347 #    if __GNUC__ >= 3
348 #      ifndef PNG_ALLOCATED
349 #        define PNG_ALLOCATED  __attribute__((__malloc__))
350 #      endif
351 #      ifndef PNG_DEPRECATED
352 #        define PNG_DEPRECATED __attribute__((__deprecated__))
353 #      endif
354 #      ifndef PNG_PRIVATE
355 #        if 0 /* Doesn't work so we use deprecated instead*/
356 #          define PNG_PRIVATE \
357             __attribute__((warning("This function is not exported by libpng.")))
358 #        else
359 #          define PNG_PRIVATE \
360             __attribute__((__deprecated__))
361 #        endif
362 #      endif
363 #    endif /*  __GNUC__ >= 3 */
364 #  endif /* __GNUC__ */
365 
366 #  if defined(_MSC_VER)  && (_MSC_VER >= 1300)
367 #    ifndef PNG_USE_RESULT
368 #      define PNG_USE_RESULT /* not supported */
369 #    endif
370 #    ifndef PNG_NORETURN
371 #      define PNG_NORETURN __declspec(noreturn)
372 #    endif
373 #    ifndef PNG_ALLOCATED
374 #      if (_MSC_VER >= 1400)
375 #        define PNG_ALLOCATED __declspec(restrict)
376 #      endif
377 #    endif
378 #    ifndef PNG_DEPRECATED
379 #      define PNG_DEPRECATED __declspec(deprecated)
380 #    endif
381 #    ifndef PNG_PRIVATE
382 #      define PNG_PRIVATE __declspec(deprecated)
383 #    endif
384 #  endif /* _MSC_VER */
385 #endif /* PNG_PEDANTIC_WARNINGS */
386 
387 #ifndef PNG_DEPRECATED
388 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
389 #endif
390 #ifndef PNG_USE_RESULT
391 #  define PNG_USE_RESULT  /* The result of this function must be checked */
392 #endif
393 #ifndef PNG_NORETURN
394 #  define PNG_NORETURN    /* This function does not return */
395 #endif
396 #ifndef PNG_ALLOCATED
397 #  define PNG_ALLOCATED   /* The result of the function is new memory */
398 #endif
399 #ifndef PNG_PRIVATE
400 #  define PNG_PRIVATE     /* This is a private libpng function */
401 #endif
402 #ifndef PNG_FP_EXPORT     /* A floating point API. */
403 #  ifdef PNG_FLOATING_POINT_SUPPORTED
404 #     define PNG_FP_EXPORT(ordinal, type, name, args)\
405          PNG_EXPORT(ordinal, type, name, args);
406 #  else                   /* No floating point APIs */
407 #     define PNG_FP_EXPORT(ordinal, type, name, args)
408 #  endif
409 #endif
410 #ifndef PNG_FIXED_EXPORT  /* A fixed point API. */
411 #  ifdef PNG_FIXED_POINT_SUPPORTED
412 #     define PNG_FIXED_EXPORT(ordinal, type, name, args)\
413          PNG_EXPORT(ordinal, type, name, args);
414 #  else                   /* No fixed point APIs */
415 #     define PNG_FIXED_EXPORT(ordinal, type, name, args)
416 #  endif
417 #endif
418 
419 /* The following uses const char * instead of char * for error
420  * and warning message functions, so some compilers won't complain.
421  * If you do not want to use const, define PNG_NO_CONST here.
422  *
423  * This should not change how the APIs are called, so it can be done
424  * on a per-file basis in the application.
425  */
426 #ifndef PNG_CONST
427 #  ifndef PNG_NO_CONST
428 #    define PNG_CONST const
429 #  else
430 #    define PNG_CONST
431 #  endif
432 #endif
433 
434 /* Some typedefs to get us started.  These should be safe on most of the
435  * common platforms.  The typedefs should be at least as large as the
436  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
437  * don't have to be exactly that size.  Some compilers dislike passing
438  * unsigned shorts as function parameters, so you may be better off using
439  * unsigned int for png_uint_16.
440  */
441 
442 #if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
443 typedef unsigned int png_uint_32;
444 typedef int png_int_32;
445 #else
446 typedef unsigned long png_uint_32;
447 typedef long png_int_32;
448 #endif
449 typedef unsigned short png_uint_16;
450 typedef short png_int_16;
451 typedef unsigned char png_byte;
452 
453 #ifdef PNG_NO_SIZE_T
454 typedef unsigned int png_size_t;
455 #else
456 typedef size_t png_size_t;
457 #endif
458 #define png_sizeof(x) (sizeof (x))
459 
460 /* The following is needed for medium model support.  It cannot be in the
461  * pngpriv.h header.  Needs modification for other compilers besides
462  * MSC.  Model independent support declares all arrays and pointers to be
463  * large using the far keyword.  The zlib version used must also support
464  * model independent data.  As of version zlib 1.0.4, the necessary changes
465  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
466  * changes that are needed. (Tim Wegner)
467  */
468 
469 /* Separate compiler dependencies (problem here is that zlib.h always
470  * defines FAR. (SJT)
471  */
472 #ifdef __BORLANDC__
473 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
474 #    define LDATA 1
475 #  else
476 #    define LDATA 0
477 #  endif
478   /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
479 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
480 #    define PNG_MAX_MALLOC_64K /* only used in build */
481 #    if (LDATA != 1)
482 #      ifndef FAR
483 #        define FAR __far
484 #      endif
485 #      define USE_FAR_KEYWORD
486 #    endif   /* LDATA != 1 */
487          /* Possibly useful for moving data out of default segment.
488           * Uncomment it if you want. Could also define FARDATA as
489           * const if your compiler supports it. (SJT)
490 #        define FARDATA FAR
491           */
492 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
493 #endif   /* __BORLANDC__ */
494 
495 
496 /* Suggest testing for specific compiler first before testing for
497  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
498  * making reliance oncertain keywords suspect. (SJT)
499  */
500 
501 /* MSC Medium model */
502 #ifdef FAR
503 #  ifdef M_I86MM
504 #    define USE_FAR_KEYWORD
505 #    define FARDATA FAR
506 #    include <dos.h>
507 #  endif
508 #endif
509 
510 /* SJT: default case */
511 #ifndef FAR
512 #  define FAR
513 #endif
514 
515 /* At this point FAR is always defined */
516 #ifndef FARDATA
517 #  define FARDATA
518 #endif
519 
520 /* Typedef for floating-point numbers that are converted
521  * to fixed-point with a multiple of 100,000, e.g., gamma
522  */
523 typedef png_int_32 png_fixed_point;
524 
525 /* Add typedefs for pointers */
526 typedef void                      FAR * png_voidp;
527 typedef PNG_CONST void            FAR * png_const_voidp;
528 typedef png_byte                  FAR * png_bytep;
529 typedef PNG_CONST png_byte        FAR * png_const_bytep;
530 typedef png_uint_32               FAR * png_uint_32p;
531 typedef PNG_CONST png_uint_32     FAR * png_const_uint_32p;
532 typedef png_int_32                FAR * png_int_32p;
533 typedef PNG_CONST png_int_32      FAR * png_const_int_32p;
534 typedef png_uint_16               FAR * png_uint_16p;
535 typedef PNG_CONST png_uint_16     FAR * png_const_uint_16p;
536 typedef png_int_16                FAR * png_int_16p;
537 typedef PNG_CONST png_int_16      FAR * png_const_int_16p;
538 typedef char                      FAR * png_charp;
539 typedef PNG_CONST char            FAR * png_const_charp;
540 typedef png_fixed_point           FAR * png_fixed_point_p;
541 typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
542 typedef png_size_t                FAR * png_size_tp;
543 typedef PNG_CONST png_size_t      FAR * png_const_size_tp;
544 
545 #ifdef PNG_STDIO_SUPPORTED
546 typedef FILE            * png_FILE_p;
547 #endif
548 
549 #ifdef PNG_FLOATING_POINT_SUPPORTED
550 typedef double           FAR * png_doublep;
551 typedef PNG_CONST double FAR * png_const_doublep;
552 #endif
553 
554 /* Pointers to pointers; i.e. arrays */
555 typedef png_byte        FAR * FAR * png_bytepp;
556 typedef png_uint_32     FAR * FAR * png_uint_32pp;
557 typedef png_int_32      FAR * FAR * png_int_32pp;
558 typedef png_uint_16     FAR * FAR * png_uint_16pp;
559 typedef png_int_16      FAR * FAR * png_int_16pp;
560 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
561 typedef char            FAR * FAR * png_charpp;
562 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
563 #ifdef PNG_FLOATING_POINT_SUPPORTED
564 typedef double          FAR * FAR * png_doublepp;
565 #endif
566 
567 /* Pointers to pointers to pointers; i.e., pointer to array */
568 typedef char            FAR * FAR * FAR * png_charppp;
569 
570 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
571  * and no smaller than png_uint_32.  Casts from png_size_t or png_uint_32
572  * to png_alloc_size_t are not necessary; in fact, it is recommended
573  * not to use them at all so that the compiler can complain when something
574  * turns out to be problematic.
575  * Casts in the other direction (from png_alloc_size_t to png_size_t or
576  * png_uint_32) should be explicitly applied; however, we do not expect
577  * to encounter practical situations that require such conversions.
578  */
579 #if defined(__TURBOC__) && !defined(__FLAT__)
580    typedef unsigned long png_alloc_size_t;
581 #else
582 #  if defined(_MSC_VER) && defined(MAXSEG_64K)
583      typedef unsigned long    png_alloc_size_t;
584 #  else
585      /* This is an attempt to detect an old Windows system where (int) is
586       * actually 16 bits, in that case png_malloc must have an argument with a
587       * bigger size to accomodate the requirements of the library.
588       */
589 #    if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
590         (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
591        typedef DWORD         png_alloc_size_t;
592 #    else
593        typedef png_size_t    png_alloc_size_t;
594 #    endif
595 #  endif
596 #endif
597 
598 #endif /* PNGCONF_H */
599