summaryrefslogtreecommitdiff
path: root/Build/source/libs/libpng/libpng-src/pngconf.h
blob: f64592acd7d68b3f7230e14a1006b07256c7ac6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622

/* pngconf.h - machine configurable file for libpng
 *
 * libpng version 1.6.30, June 28, 2017
 *
 * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer
 * and license in png.h
 *
 * Any machine specific code is near the front of this file, so if you
 * are configuring libpng for a machine, you may want to read the section
 * starting here down to where it starts to typedef png_color, png_text,
 * and png_info.
 */

#ifndef PNGCONF_H
#define PNGCONF_H

#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */

/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
 * compiler for correct compilation.  The following header files are required by
 * the standard.  If your compiler doesn't provide these header files, or they
 * do not match the standard, you will need to provide/improve them.
 */
#include <limits.h>
#include <stddef.h>

/* Library header files.  These header files are all defined by ISOC90; libpng
 * expects conformant implementations, however, an ISOC90 conformant system need
 * not provide these header files if the functionality cannot be implemented.
 * In this case it will be necessary to disable the relevant parts of libpng in
 * the build of pnglibconf.h.
 *
 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
 * include this unnecessary header file.
 */

#ifdef PNG_STDIO_SUPPORTED
   /* Required for the definition of FILE: */
#  include <stdio.h>
#endif

#ifdef PNG_SETJMP_SUPPORTED
   /* Required for the definition of jmp_buf and the declaration of longjmp: */
#  include <setjmp.h>
#endif

#ifdef PNG_CONVERT_tIME_SUPPORTED
   /* Required for struct tm: */
#  include <time.h>
#endif

#endif /* PNG_BUILDING_SYMBOL_TABLE */

/* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
 * PNG_NO_CONST; this is no longer supported except for data declarations which
 * apparently still cause problems in 2011 on some compilers.
 */
#define PNG_CONST const /* backward compatibility only */

/* This controls optimization of the reading of 16-bit and 32-bit values
 * from PNG files.  It can be set on a per-app-file basis - it
 * just changes whether a macro is used when the function is called.
 * The library builder sets the default; if read functions are not
 * built into the library the macro implementation is forced on.
 */
#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
#  define PNG_USE_READ_MACROS
#endif
#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
#  if PNG_DEFAULT_READ_MACROS
#    define PNG_USE_READ_MACROS
#  endif
#endif

/* COMPILER SPECIFIC OPTIONS.
 *
 * These options are provided so that a variety of difficult compilers
 * can be used.  Some are fixed at build time (e.g. PNG_API_RULE
 * below) but still have compiler specific implementations, others
 * may be changed on a per-file basis when compiling against libpng.
 */

/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
 * against legacy (pre ISOC90) compilers that did not understand function
 * prototypes.  It is not required for modern C compilers.
 */
#ifndef PNGARG
#  define PNGARG(arglist) arglist
#endif

/* Function calling conventions.
 * =============================
 * Normally it is not necessary to specify to the compiler how to call
 * a function - it just does it - however on x86 systems derived from
 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
 * and some others) there are multiple ways to call a function and the
 * default can be changed on the compiler command line.  For this reason
 * libpng specifies the calling convention of every exported function and
 * every function called via a user supplied function pointer.  This is
 * done in this file by defining the following macros:
 *
 * PNGAPI    Calling convention for exported functions.
 * PNGCBAPI  Calling convention for user provided (callback) functions.
 * PNGCAPI   Calling convention used by the ANSI-C library (required
 *           for longjmp callbacks and sometimes used internally to
 *           specify the calling convention for zlib).
 *
 * These macros should never be overridden.  If it is necessary to
 * change calling convention in a private build this can be done
 * by setting PNG_API_RULE (which defaults to 0) to one of the values
 * below to select the correct 'API' variants.
 *
 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
 *                This is correct in every known environment.
 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
 *                the 'C' calling convention (from PNGCAPI) for
 *                callbacks (PNGCBAPI).  This is no longer required
 *                in any known environment - if it has to be used
 *                please post an explanation of the problem to the
 *                libpng mailing list.
 *
 * These cases only differ if the operating system does not use the C
 * calling convention, at present this just means the above cases
 * (x86 DOS/Windows sytems) and, even then, this does not apply to
 * Cygwin running on those systems.
 *
 * Note that the value must be defined in pnglibconf.h so that what
 * the application uses to call the library matches the conventions
 * set when building the library.
 */

/* Symbol export
 * =============
 * When building a shared library it is almost always necessary to tell
 * the compiler which symbols to export.  The png.h macro 'PNG_EXPORT'
 * is used to mark the symbols.  On some systems these symbols can be
 * extracted at link time and need no special processing by the compiler,
 * on other systems the symbols are flagged by the compiler and just
 * the declaration requires a special tag applied (unfortunately) in a
 * compiler dependent way.  Some systems can do either.
 *
 * A small number of older systems also require a symbol from a DLL to
 * be flagged to the program that calls it.  This is a problem because
 * we do not know in the header file included by application code that
 * the symbol will come from a shared library, as opposed to a statically
 * linked one.  For this reason the application must tell us by setting
 * the magic flag PNG_USE_DLL to turn on the special processing before
 * it includes png.h.
 *
 * Four additional macros are used to make this happen:
 *
 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
 *            the build or imported if PNG_USE_DLL is set - compiler
 *            and system specific.
 *
 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
 *                       'type', compiler specific.
 *
 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
 *                make a symbol exported from the DLL.  Not used in the
 *                public header files; see pngpriv.h for how it is used
 *                in the libpng build.
 *
 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
 *                from a DLL - used to define PNG_IMPEXP when
 *                PNG_USE_DLL is set.
 */

/* System specific discovery.
 * ==========================
 * This code is used at build time to find PNG_IMPEXP, the API settings
 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
 * import processing is possible.  On Windows systems it also sets
 * compiler-specific macros to the values required to change the calling
 * conventions of the various functions.
 */
#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
    defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
  /* Windows system (DOS doesn't support DLLs).  Includes builds under Cygwin or
   * MinGW on any architecture currently supported by Windows.  Also includes
   * Watcom builds but these need special treatment because they are not
   * compatible with GCC or Visual C because of different calling conventions.
   */
#  if PNG_API_RULE == 2
   /* If this line results in an error, either because __watcall is not
    * understood or because of a redefine just below you cannot use *this*
    * build of the library with the compiler you are using.  *This* build was
    * build using Watcom and applications must also be built using Watcom!
    */
#    define PNGCAPI __watcall
#  endif

#  if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
#    define PNGCAPI __cdecl
#    if PNG_API_RULE == 1
   /* If this line results in an error __stdcall is not understood and
    * PNG_API_RULE should not have been set to '1'.
    */
#      define PNGAPI __stdcall
#    endif
#  else
   /* An older compiler, or one not detected (erroneously) above,
    * if necessary override on the command line to get the correct
    * variants for the compiler.
    */
#    ifndef PNGCAPI
#      define PNGCAPI _cdecl
#    endif
#    if PNG_API_RULE == 1 && !defined(PNGAPI)
#      define PNGAPI _stdcall
#    endif
#  endif /* compiler/api */

  /* NOTE: PNGCBAPI always defaults to PNGCAPI. */

#  if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
#     error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
#  endif

#  if (defined(_MSC_VER) && _MSC_VER < 800) ||\
      (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
   /* older Borland and MSC
    * compilers used '__export' and required this to be after
    * the type.
    */
#    ifndef PNG_EXPORT_TYPE
#      define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
#    endif
#    define PNG_DLL_EXPORT __export
#  else /* newer compiler */
#    define PNG_DLL_EXPORT __declspec(dllexport)
#    ifndef PNG_DLL_IMPORT
#      define PNG_DLL_IMPORT __declspec(dllimport)
#    endif
#  endif /* compiler */

#else /* !Windows */
#  if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
#    define PNGAPI _System
#  else /* !Windows/x86 && !OS/2 */
   /* Use the defaults, or define PNG*API on the command line (but
    * this will have to be done for every compile!)
    */
#  endif /* other system, !OS/2 */
#endif /* !Windows/x86 */

/* Now do all the defaulting . */
#ifndef PNGCAPI
#  define PNGCAPI
#endif
#ifndef PNGCBAPI
#  define PNGCBAPI PNGCAPI
#endif
#ifndef PNGAPI
#  define PNGAPI PNGCAPI
#endif

/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
 * then in an internal header file when building the library, otherwise (when
 * using the library) it is set here.
 */
#ifndef PNG_IMPEXP
#  if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
   /* This forces use of a DLL, disallowing static linking */
#    define PNG_IMPEXP PNG_DLL_IMPORT
#  endif

#  ifndef PNG_IMPEXP
#    define PNG_IMPEXP
#  endif
#endif

/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
 * 'attributes' as a storage class - the attributes go at the start of the
 * function definition, and attributes are always appended regardless of the
 * compiler.  This considerably simplifies these macros but may cause problems
 * if any compilers both need function attributes and fail to handle them as
 * a storage class (this is unlikely.)
 */
#ifndef PNG_FUNCTION
#  define PNG_FUNCTION(type, name, args, attributes) attributes type name args
#endif

#ifndef PNG_EXPORT_TYPE
#  define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
#endif

   /* The ordinal value is only relevant when preprocessing png.h for symbol
    * table entries, so we discard it here.  See the .dfn files in the
    * scripts directory.
    */

#ifndef PNG_EXPORTA
#  define PNG_EXPORTA(ordinal, type, name, args, attributes) \
      PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
      PNG_LINKAGE_API attributes)
#endif

/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
 * so make something non-empty to satisfy the requirement:
 */
#define PNG_EMPTY /*empty list*/

#define PNG_EXPORT(ordinal, type, name, args) \
   PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)

/* Use PNG_REMOVED to comment out a removed interface. */
#ifndef PNG_REMOVED
#  define PNG_REMOVED(ordinal, type, name, args, attributes)
#endif

#ifndef PNG_CALLBACK
#  define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
#endif

/* Support for compiler specific function attributes.  These are used
 * so that where compiler support is available incorrect use of API
 * functions in png.h will generate compiler warnings.
 *
 * Added at libpng-1.2.41.
 */

#ifndef PNG_NO_PEDANTIC_WARNINGS
#  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
#    define PNG_PEDANTIC_WARNINGS_SUPPORTED
#  endif
#endif

#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
  /* Support for compiler specific function attributes.  These are used
   * so that where compiler support is available, incorrect use of API
   * functions in png.h will generate compiler warnings.  Added at libpng
   * version 1.2.41.  Disabling these removes the warnings but may also produce
   * less efficient code.
   */
#  if defined(__clang__) && defined(__has_attribute)
   /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
#    if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
#      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
#    endif
#    if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
#      define PNG_NORETURN __attribute__((__noreturn__))
#    endif
#    if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
#      define PNG_ALLOCATED __attribute__((__malloc__))
#    endif
#    if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
#      define PNG_DEPRECATED __attribute__((__deprecated__))
#    endif
#    if !defined(PNG_PRIVATE)
#      ifdef __has_extension
#        if __has_extension(attribute_unavailable_with_message)
#          define PNG_PRIVATE __attribute__((__unavailable__(\
             "This function is not exported by libpng.")))
#        endif
#      endif
#    endif
#    ifndef PNG_RESTRICT
#      define PNG_RESTRICT __restrict
#    endif

#  elif defined(__GNUC__)
#    ifndef PNG_USE_RESULT
#      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
#    endif
#    ifndef PNG_NORETURN
#      define PNG_NORETURN   __attribute__((__noreturn__))
#    endif
#    if __GNUC__ >= 3
#      ifndef PNG_ALLOCATED
#        define PNG_ALLOCATED  __attribute__((__malloc__))
#      endif
#      ifndef PNG_DEPRECATED
#        define PNG_DEPRECATED __attribute__((__deprecated__))
#      endif
#      ifndef PNG_PRIVATE
#        if 0 /* Doesn't work so we use deprecated instead*/
#          define PNG_PRIVATE \
            __attribute__((warning("This function is not exported by libpng.")))
#        else
#          define PNG_PRIVATE \
            __attribute__((__deprecated__))
#        endif
#      endif
#      if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
#        ifndef PNG_RESTRICT
#          define PNG_RESTRICT __restrict
#        endif
#      endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
#    endif /* __GNUC__ >= 3 */

#  elif defined(_MSC_VER)  && (_MSC_VER >= 1300)
#    ifndef PNG_USE_RESULT
#      define PNG_USE_RESULT /* not supported */
#    endif
#    ifndef PNG_NORETURN
#      define PNG_NORETURN   __declspec(noreturn)
#    endif
#    ifndef PNG_ALLOCATED
#      if (_MSC_VER >= 1400)
#        define PNG_ALLOCATED __declspec(restrict)
#      endif
#    endif
#    ifndef PNG_DEPRECATED
#      define PNG_DEPRECATED __declspec(deprecated)
#    endif
#    ifndef PNG_PRIVATE
#      define PNG_PRIVATE __declspec(deprecated)
#    endif
#    ifndef PNG_RESTRICT
#      if (_MSC_VER >= 1400)
#        define PNG_RESTRICT __restrict
#      endif
#    endif

#  elif defined(__WATCOMC__)
#    ifndef PNG_RESTRICT
#      define PNG_RESTRICT __restrict
#    endif
#  endif
#endif /* PNG_PEDANTIC_WARNINGS */

#ifndef PNG_DEPRECATED
#  define PNG_DEPRECATED  /* Use of this function is deprecated */
#endif
#ifndef PNG_USE_RESULT
#  define PNG_USE_RESULT  /* The result of this function must be checked */
#endif
#ifndef PNG_NORETURN
#  define PNG_NORETURN    /* This function does not return */
#endif
#ifndef PNG_ALLOCATED
#  define PNG_ALLOCATED   /* The result of the function is new memory */
#endif
#ifndef PNG_PRIVATE
#  define PNG_PRIVATE     /* This is a private libpng function */
#endif
#ifndef PNG_RESTRICT
#  define PNG_RESTRICT    /* The C99 "restrict" feature */
#endif

#ifndef PNG_FP_EXPORT     /* A floating point API. */
#  ifdef PNG_FLOATING_POINT_SUPPORTED
#     define PNG_FP_EXPORT(ordinal, type, name, args)\
         PNG_EXPORT(ordinal, type, name, args);
#  else                   /* No floating point APIs */
#     define PNG_FP_EXPORT(ordinal, type, name, args)
#  endif
#endif
#ifndef PNG_FIXED_EXPORT  /* A fixed point API. */
#  ifdef PNG_FIXED_POINT_SUPPORTED
#     define PNG_FIXED_EXPORT(ordinal, type, name, args)\
         PNG_EXPORT(ordinal, type, name, args);
#  else                   /* No fixed point APIs */
#     define PNG_FIXED_EXPORT(ordinal, type, name, args)
#  endif
#endif

#ifndef PNG_BUILDING_SYMBOL_TABLE
/* Some typedefs to get us started.  These should be safe on most of the common
 * platforms.
 *
 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
 * 32-bit value however this is not normally advisable.
 *
 * png_uint_16 and png_int_16 should always be two bytes in size - this is
 * verified at library build time.
 *
 * png_byte must always be one byte in size.
 *
 * The checks below use constants from limits.h, as defined by the ISOC90
 * standard.
 */
#if CHAR_BIT == 8 && UCHAR_MAX == 255
   typedef unsigned char png_byte;
#else
#  error "libpng requires 8-bit bytes"
#endif

#if INT_MIN == -32768 && INT_MAX == 32767
   typedef int png_int_16;
#elif SHRT_MIN == -32768 && SHRT_MAX == 32767
   typedef short png_int_16;
#else
#  error "libpng requires a signed 16-bit type"
#endif

#if UINT_MAX == 65535
   typedef unsigned int png_uint_16;
#elif USHRT_MAX == 65535
   typedef unsigned short png_uint_16;
#else
#  error "libpng requires an unsigned 16-bit type"
#endif

#if INT_MIN < -2147483646 && INT_MAX > 2147483646
   typedef int png_int_32;
#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
   typedef long int png_int_32;
#else
#  error "libpng requires a signed 32-bit (or more) type"
#endif

#if UINT_MAX > 4294967294U
   typedef unsigned int png_uint_32;
#elif ULONG_MAX > 4294967294U
   typedef unsigned long int png_uint_32;
#else
#  error "libpng requires an unsigned 32-bit (or more) type"
#endif

/* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
 */
typedef size_t png_size_t;
typedef ptrdiff_t png_ptrdiff_t;

/* libpng needs to know the maximum value of 'size_t' and this controls the
 * definition of png_alloc_size_t, below.  This maximum value of size_t limits
 * but does not control the maximum allocations the library makes - there is
 * direct application control of this through png_set_user_limits().
 */
#ifndef PNG_SMALL_SIZE_T
   /* Compiler specific tests for systems where size_t is known to be less than
    * 32 bits (some of these systems may no longer work because of the lack of
    * 'far' support; see above.)
    */
#  if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
   (defined(_MSC_VER) && defined(MAXSEG_64K))
#     define PNG_SMALL_SIZE_T
#  endif
#endif

/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
 * smaller than png_uint_32.  Casts from png_size_t or png_uint_32 to
 * png_alloc_size_t are not necessary; in fact, it is recommended not to use
 * them at all so that the compiler can complain when something turns out to be
 * problematic.
 *
 * Casts in the other direction (from png_alloc_size_t to png_size_t or
 * png_uint_32) should be explicitly applied; however, we do not expect to
 * encounter practical situations that require such conversions.
 *
 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
 * 4294967295 - i.e. less than the maximum value of png_uint_32.
 */
#ifdef PNG_SMALL_SIZE_T
   typedef png_uint_32 png_alloc_size_t;
#else
   typedef png_size_t png_alloc_size_t;
#endif

/* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
 * implementations of Intel CPU specific support of user-mode segmented address
 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
 * separate 'segment' registers.  The implementation requires two different
 * types of pointer (only one of which includes the segment value.)
 *
 * If required this support is available in version 1.2 of libpng and may be
 * available in versions through 1.5, although the correctness of the code has
 * not been verified recently.
 */

/* Typedef for floating-point numbers that are converted to fixed-point with a
 * multiple of 100,000, e.g., gamma
 */
typedef png_int_32 png_fixed_point;

/* Add typedefs for pointers */
typedef void                  * png_voidp;
typedef const void            * png_const_voidp;
typedef png_byte              * png_bytep;
typedef const png_byte        * png_const_bytep;
typedef png_uint_32           * png_uint_32p;
typedef const png_uint_32     * png_const_uint_32p;
typedef png_int_32            * png_int_32p;
typedef const png_int_32      * png_const_int_32p;
typedef png_uint_16           * png_uint_16p;
typedef const png_uint_16     * png_const_uint_16p;
typedef png_int_16            * png_int_16p;
typedef const png_int_16      * png_const_int_16p;
typedef char                  * png_charp;
typedef const char            * png_const_charp;
typedef png_fixed_point       * png_fixed_point_p;
typedef const png_fixed_point * png_const_fixed_point_p;
typedef png_size_t            * png_size_tp;
typedef const png_size_t      * png_const_size_tp;

#ifdef PNG_STDIO_SUPPORTED
typedef FILE            * png_FILE_p;
#endif

#ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double       * png_doublep;
typedef const double * png_const_doublep;
#endif

/* Pointers to pointers; i.e. arrays */
typedef png_byte        * * png_bytepp;
typedef png_uint_32     * * png_uint_32pp;
typedef png_int_32      * * png_int_32pp;
typedef png_uint_16     * * png_uint_16pp;
typedef png_int_16      * * png_int_16pp;
typedef const char      * * png_const_charpp;
typedef char            * * png_charpp;
typedef png_fixed_point * * png_fixed_point_pp;
#ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double          * * png_doublepp;
#endif

/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char            * * * png_charppp;

#endif /* PNG_BUILDING_SYMBOL_TABLE */

#endif /* PNGCONF_H */