1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /* pngconf.h - machine-configurable file for libpng
26 *
27 * libpng version 1.6.37
28 *
29 * Copyright (c) 2018-2019 Cosmin Truta
30 * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
31 * Copyright (c) 1996-1997 Andreas Dilger
32 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
33 *
34 * This code is released under the libpng license.
35 * For conditions of distribution and use, see the disclaimer
36 * and license in png.h
37 *
38 * Any machine specific code is near the front of this file, so if you
39 * are configuring libpng for a machine, you may want to read the section
40 * starting here down to where it starts to typedef png_color, png_text,
41 * and png_info.
42 */
43
44 #ifndef PNGCONF_H
45 #define PNGCONF_H
46
47 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
48
49 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
50 * compiler for correct compilation. The following header files are required by
51 * the standard. If your compiler doesn't provide these header files, or they
52 * do not match the standard, you will need to provide/improve them.
53 */
54 #include <limits.h>
55 #include <stddef.h>
56
57 /* Library header files. These header files are all defined by ISOC90; libpng
58 * expects conformant implementations, however, an ISOC90 conformant system need
59 * not provide these header files if the functionality cannot be implemented.
60 * In this case it will be necessary to disable the relevant parts of libpng in
61 * the build of pnglibconf.h.
62 *
63 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
64 * include this unnecessary header file.
65 */
66
67 #ifdef PNG_STDIO_SUPPORTED
68 /* Required for the definition of FILE: */
69 # include <stdio.h>
70 #endif
71
72 #ifdef PNG_SETJMP_SUPPORTED
73 /* Required for the definition of jmp_buf and the declaration of longjmp: */
74 # include <setjmp.h>
75 #endif
76
77 #ifdef PNG_CONVERT_tIME_SUPPORTED
78 /* Required for struct tm: */
79 # include <time.h>
80 #endif
81
82 #endif /* PNG_BUILDING_SYMBOL_TABLE */
83
84 /* Prior to 1.6.0, it was possible to turn off 'const' in declarations,
85 * using PNG_NO_CONST. This is no longer supported.
86 */
87 #define PNG_CONST const /* backward compatibility only */
88
89 /* This controls optimization of the reading of 16-bit and 32-bit
90 * values from PNG files. It can be set on a per-app-file basis: it
91 * just changes whether a macro is used when the function is called.
92 * The library builder sets the default; if read functions are not
93 * built into the library the macro implementation is forced on.
94 */
95 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
96 # define PNG_USE_READ_MACROS
97 #endif
98 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
99 # if PNG_DEFAULT_READ_MACROS
100 # define PNG_USE_READ_MACROS
101 # endif
102 #endif
103
104 /* COMPILER SPECIFIC OPTIONS.
105 *
106 * These options are provided so that a variety of difficult compilers
107 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
108 * below) but still have compiler specific implementations, others
109 * may be changed on a per-file basis when compiling against libpng.
110 */
111
112 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
113 * against legacy (pre ISOC90) compilers that did not understand function
114 * prototypes. It is not required for modern C compilers.
115 */
116 #ifndef PNGARG
117 # define PNGARG(arglist) arglist
118 #endif
119
120 /* Function calling conventions.
121 * =============================
122 * Normally it is not necessary to specify to the compiler how to call
123 * a function - it just does it - however on x86 systems derived from
124 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
125 * and some others) there are multiple ways to call a function and the
126 * default can be changed on the compiler command line. For this reason
127 * libpng specifies the calling convention of every exported function and
128 * every function called via a user supplied function pointer. This is
129 * done in this file by defining the following macros:
130 *
131 * PNGAPI Calling convention for exported functions.
132 * PNGCBAPI Calling convention for user provided (callback) functions.
133 * PNGCAPI Calling convention used by the ANSI-C library (required
134 * for longjmp callbacks and sometimes used internally to
135 * specify the calling convention for zlib).
136 *
137 * These macros should never be overridden. If it is necessary to
138 * change calling convention in a private build this can be done
139 * by setting PNG_API_RULE (which defaults to 0) to one of the values
140 * below to select the correct 'API' variants.
141 *
142 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
143 * This is correct in every known environment.
144 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
145 * the 'C' calling convention (from PNGCAPI) for
146 * callbacks (PNGCBAPI). This is no longer required
147 * in any known environment - if it has to be used
148 * please post an explanation of the problem to the
149 * libpng mailing list.
150 *
151 * These cases only differ if the operating system does not use the C
152 * calling convention, at present this just means the above cases
153 * (x86 DOS/Windows systems) and, even then, this does not apply to
154 * Cygwin running on those systems.
155 *
156 * Note that the value must be defined in pnglibconf.h so that what
157 * the application uses to call the library matches the conventions
158 * set when building the library.
159 */
160
161 /* Symbol export
162 * =============
163 * When building a shared library it is almost always necessary to tell
164 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
165 * is used to mark the symbols. On some systems these symbols can be
166 * extracted at link time and need no special processing by the compiler,
167 * on other systems the symbols are flagged by the compiler and just
168 * the declaration requires a special tag applied (unfortunately) in a
169 * compiler dependent way. Some systems can do either.
170 *
171 * A small number of older systems also require a symbol from a DLL to
172 * be flagged to the program that calls it. This is a problem because
173 * we do not know in the header file included by application code that
174 * the symbol will come from a shared library, as opposed to a statically
175 * linked one. For this reason the application must tell us by setting
176 * the magic flag PNG_USE_DLL to turn on the special processing before
177 * it includes png.h.
178 *
179 * Four additional macros are used to make this happen:
180 *
181 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
182 * the build or imported if PNG_USE_DLL is set - compiler
183 * and system specific.
184 *
185 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
186 * 'type', compiler specific.
187 *
188 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
189 * make a symbol exported from the DLL. Not used in the
190 * public header files; see pngpriv.h for how it is used
191 * in the libpng build.
192 *
193 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
194 * from a DLL - used to define PNG_IMPEXP when
195 * PNG_USE_DLL is set.
196 */
197
198 /* System specific discovery.
199 * ==========================
200 * This code is used at build time to find PNG_IMPEXP, the API settings
201 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
202 * import processing is possible. On Windows systems it also sets
203 * compiler-specific macros to the values required to change the calling
204 * conventions of the various functions.
205 */
206 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
207 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
208 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
209 * MinGW on any architecture currently supported by Windows. Also includes
210 * Watcom builds but these need special treatment because they are not
211 * compatible with GCC or Visual C because of different calling conventions.
212 */
213 # if PNG_API_RULE == 2
214 /* If this line results in an error, either because __watcall is not
215 * understood or because of a redefine just below you cannot use *this*
216 * build of the library with the compiler you are using. *This* build was
217 * build using Watcom and applications must also be built using Watcom!
218 */
219 # define PNGCAPI __watcall
220 # endif
221
222 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
223 # define PNGCAPI __cdecl
224 # if PNG_API_RULE == 1
225 /* If this line results in an error __stdcall is not understood and
226 * PNG_API_RULE should not have been set to '1'.
227 */
228 # define PNGAPI __stdcall
229 # endif
230 # else
231 /* An older compiler, or one not detected (erroneously) above,
232 * if necessary override on the command line to get the correct
233 * variants for the compiler.
234 */
235 # ifndef PNGCAPI
236 # define PNGCAPI _cdecl
237 # endif
238 # if PNG_API_RULE == 1 && !defined(PNGAPI)
239 # define PNGAPI _stdcall
240 # endif
241 # endif /* compiler/api */
242
243 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
244
245 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
246 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
247 # endif
248
249 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
250 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
251 /* older Borland and MSC
252 * compilers used '__export' and required this to be after
253 * the type.
254 */
255 # ifndef PNG_EXPORT_TYPE
256 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
257 # endif
258 # define PNG_DLL_EXPORT __export
259 # else /* newer compiler */
260 # define PNG_DLL_EXPORT __declspec(dllexport)
261 # ifndef PNG_DLL_IMPORT
262 # define PNG_DLL_IMPORT __declspec(dllimport)
263 # endif
264 # endif /* compiler */
265
266 #else /* !Windows */
267 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
268 # define PNGAPI _System
269 # else /* !Windows/x86 && !OS/2 */
270 /* Use the defaults, or define PNG*API on the command line (but
271 * this will have to be done for every compile!)
272 */
273 # endif /* other system, !OS/2 */
274 #endif /* !Windows/x86 */
275
276 /* Now do all the defaulting . */
277 #ifndef PNGCAPI
278 # define PNGCAPI
279 #endif
280 #ifndef PNGCBAPI
281 # define PNGCBAPI PNGCAPI
282 #endif
283 #ifndef PNGAPI
284 # define PNGAPI PNGCAPI
285 #endif
286
287 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
288 * then in an internal header file when building the library, otherwise (when
289 * using the library) it is set here.
290 */
291 #ifndef PNG_IMPEXP
292 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
293 /* This forces use of a DLL, disallowing static linking */
294 # define PNG_IMPEXP PNG_DLL_IMPORT
295 # endif
296
297 # ifndef PNG_IMPEXP
298 # define PNG_IMPEXP
299 # endif
300 #endif
301
302 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
303 * 'attributes' as a storage class - the attributes go at the start of the
304 * function definition, and attributes are always appended regardless of the
305 * compiler. This considerably simplifies these macros but may cause problems
306 * if any compilers both need function attributes and fail to handle them as
307 * a storage class (this is unlikely.)
308 */
309 #ifndef PNG_FUNCTION
310 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
311 #endif
312
313 #ifndef PNG_EXPORT_TYPE
314 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
315 #endif
316
317 /* The ordinal value is only relevant when preprocessing png.h for symbol
318 * table entries, so we discard it here. See the .dfn files in the
319 * scripts directory.
320 */
321
322 #ifndef PNG_EXPORTA
323 # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
324 PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
325 PNG_LINKAGE_API attributes)
326 #endif
327
328 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
329 * so make something non-empty to satisfy the requirement:
330 */
331 #define PNG_EMPTY /*empty list*/
332
333 #define PNG_EXPORT(ordinal, type, name, args) \
334 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
335
336 /* Use PNG_REMOVED to comment out a removed interface. */
337 #ifndef PNG_REMOVED
338 # define PNG_REMOVED(ordinal, type, name, args, attributes)
339 #endif
340
341 #ifndef PNG_CALLBACK
342 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
343 #endif
344
345 /* Support for compiler specific function attributes. These are used
346 * so that where compiler support is available incorrect use of API
347 * functions in png.h will generate compiler warnings.
348 *
349 * Added at libpng-1.2.41.
350 */
351
352 #ifndef PNG_NO_PEDANTIC_WARNINGS
353 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
354 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
355 # endif
356 #endif
357
358 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
359 /* Support for compiler specific function attributes. These are used
360 * so that where compiler support is available, incorrect use of API
361 * functions in png.h will generate compiler warnings. Added at libpng
362 * version 1.2.41. Disabling these removes the warnings but may also produce
363 * less efficient code.
364 */
365 # if defined(__clang__) && defined(__has_attribute)
366 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
367 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
368 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
369 # endif
370 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
371 # define PNG_NORETURN __attribute__((__noreturn__))
372 # endif
373 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
374 # define PNG_ALLOCATED __attribute__((__malloc__))
375 # endif
376 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
377 # define PNG_DEPRECATED __attribute__((__deprecated__))
378 # endif
379 # if !defined(PNG_PRIVATE)
380 # ifdef __has_extension
381 # if __has_extension(attribute_unavailable_with_message)
382 # define PNG_PRIVATE __attribute__((__unavailable__(\
383 "This function is not exported by libpng.")))
384 # endif
385 # endif
386 # endif
387 # ifndef PNG_RESTRICT
388 # define PNG_RESTRICT __restrict
389 # endif
390
391 # elif defined(__GNUC__)
392 # ifndef PNG_USE_RESULT
393 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
394 # endif
395 # ifndef PNG_NORETURN
396 # define PNG_NORETURN __attribute__((__noreturn__))
397 # endif
398 # if __GNUC__ >= 3
399 # ifndef PNG_ALLOCATED
400 # define PNG_ALLOCATED __attribute__((__malloc__))
401 # endif
402 # ifndef PNG_DEPRECATED
403 # define PNG_DEPRECATED __attribute__((__deprecated__))
404 # endif
405 # ifndef PNG_PRIVATE
406 # if 0 /* Doesn't work so we use deprecated instead*/
407 # define PNG_PRIVATE \
408 __attribute__((warning("This function is not exported by libpng.")))
409 # else
410 # define PNG_PRIVATE \
411 __attribute__((__deprecated__))
412 # endif
413 # endif
414 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
415 # ifndef PNG_RESTRICT
416 # define PNG_RESTRICT __restrict
417 # endif
418 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
419 # endif /* __GNUC__ >= 3 */
420
421 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
422 # ifndef PNG_USE_RESULT
423 # define PNG_USE_RESULT /* not supported */
424 # endif
425 # ifndef PNG_NORETURN
426 # define PNG_NORETURN __declspec(noreturn)
427 # endif
428 # ifndef PNG_ALLOCATED
429 # if (_MSC_VER >= 1400)
430 # define PNG_ALLOCATED __declspec(restrict)
431 # endif
432 # endif
433 # ifndef PNG_DEPRECATED
434 # define PNG_DEPRECATED __declspec(deprecated)
435 # endif
436 # ifndef PNG_PRIVATE
437 # define PNG_PRIVATE __declspec(deprecated)
438 # endif
439 # ifndef PNG_RESTRICT
440 # if (_MSC_VER >= 1400)
441 # define PNG_RESTRICT __restrict
442 # endif
443 # endif
444
445 # elif defined(__WATCOMC__)
446 # ifndef PNG_RESTRICT
447 # define PNG_RESTRICT __restrict
448 # endif
449 # endif
450 #endif /* PNG_PEDANTIC_WARNINGS */
451
452 #ifndef PNG_DEPRECATED
453 # define PNG_DEPRECATED /* Use of this function is deprecated */
454 #endif
455 #ifndef PNG_USE_RESULT
456 # define PNG_USE_RESULT /* The result of this function must be checked */
457 #endif
458 #ifndef PNG_NORETURN
459 # define PNG_NORETURN /* This function does not return */
460 #endif
461 #ifndef PNG_ALLOCATED
462 # define PNG_ALLOCATED /* The result of the function is new memory */
463 #endif
464 #ifndef PNG_PRIVATE
465 # define PNG_PRIVATE /* This is a private libpng function */
466 #endif
467 #ifndef PNG_RESTRICT
468 # define PNG_RESTRICT /* The C99 "restrict" feature */
469 #endif
470
471 #ifndef PNG_FP_EXPORT /* A floating point API. */
472 # ifdef PNG_FLOATING_POINT_SUPPORTED
473 # define PNG_FP_EXPORT(ordinal, type, name, args)\
474 PNG_EXPORT(ordinal, type, name, args);
475 # else /* No floating point APIs */
476 # define PNG_FP_EXPORT(ordinal, type, name, args)
477 # endif
478 #endif
479 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
480 # ifdef PNG_FIXED_POINT_SUPPORTED
481 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
482 PNG_EXPORT(ordinal, type, name, args);
483 # else /* No fixed point APIs */
484 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
485 # endif
486 #endif
487
488 #ifndef PNG_BUILDING_SYMBOL_TABLE
489 /* Some typedefs to get us started. These should be safe on most of the common
490 * platforms.
491 *
492 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
493 * 32-bit value however this is not normally advisable.
494 *
495 * png_uint_16 and png_int_16 should always be two bytes in size - this is
496 * verified at library build time.
497 *
498 * png_byte must always be one byte in size.
499 *
500 * The checks below use constants from limits.h, as defined by the ISOC90
501 * standard.
502 */
503 #if CHAR_BIT == 8 && UCHAR_MAX == 255
504 typedef unsigned char png_byte;
505 #else
506 # error "libpng requires 8-bit bytes"
507 #endif
508
509 #if INT_MIN == -32768 && INT_MAX == 32767
510 typedef int png_int_16;
511 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
512 typedef short png_int_16;
513 #else
514 # error "libpng requires a signed 16-bit type"
515 #endif
516
517 #if UINT_MAX == 65535
518 typedef unsigned int png_uint_16;
519 #elif USHRT_MAX == 65535
520 typedef unsigned short png_uint_16;
521 #else
522 # error "libpng requires an unsigned 16-bit type"
523 #endif
524
525 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
526 typedef int png_int_32;
527 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
528 typedef long int png_int_32;
529 #else
530 # error "libpng requires a signed 32-bit (or more) type"
531 #endif
532
533 #if UINT_MAX > 4294967294U
534 typedef unsigned int png_uint_32;
535 #elif ULONG_MAX > 4294967294U
536 typedef unsigned long int png_uint_32;
537 #else
538 # error "libpng requires an unsigned 32-bit (or more) type"
539 #endif
540
541 /* Prior to 1.6.0, it was possible to disable the use of size_t and ptrdiff_t.
542 * From 1.6.0 onwards, an ISO C90 compiler, as well as a standard-compliant
543 * behavior of sizeof and ptrdiff_t are required.
544 * The legacy typedefs are provided here for backwards compatibility.
545 */
546 typedef size_t png_size_t;
547 typedef ptrdiff_t png_ptrdiff_t;
548
549 /* libpng needs to know the maximum value of 'size_t' and this controls the
550 * definition of png_alloc_size_t, below. This maximum value of size_t limits
551 * but does not control the maximum allocations the library makes - there is
552 * direct application control of this through png_set_user_limits().
553 */
554 #ifndef PNG_SMALL_SIZE_T
555 /* Compiler specific tests for systems where size_t is known to be less than
556 * 32 bits (some of these systems may no longer work because of the lack of
557 * 'far' support; see above.)
558 */
559 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
560 (defined(_MSC_VER) && defined(MAXSEG_64K))
561 # define PNG_SMALL_SIZE_T
562 # endif
563 #endif
564
565 /* png_alloc_size_t is guaranteed to be no smaller than size_t, and no smaller
566 * than png_uint_32. Casts from size_t or png_uint_32 to png_alloc_size_t are
567 * not necessary; in fact, it is recommended not to use them at all, so that
568 * the compiler can complain when something turns out to be problematic.
569 *
570 * Casts in the other direction (from png_alloc_size_t to size_t or
571 * png_uint_32) should be explicitly applied; however, we do not expect to
572 * encounter practical situations that require such conversions.
573 *
574 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
575 * 4294967295 - i.e. less than the maximum value of png_uint_32.
576 */
577 #ifdef PNG_SMALL_SIZE_T
578 typedef png_uint_32 png_alloc_size_t;
579 #else
580 typedef size_t png_alloc_size_t;
581 #endif
582
583 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
584 * implementations of Intel CPU specific support of user-mode segmented address
585 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
586 * separate 'segment' registers. The implementation requires two different
587 * types of pointer (only one of which includes the segment value.)
588 *
589 * If required this support is available in version 1.2 of libpng and may be
590 * available in versions through 1.5, although the correctness of the code has
591 * not been verified recently.
592 */
593
594 /* Typedef for floating-point numbers that are converted to fixed-point with a
595 * multiple of 100,000, e.g., gamma
596 */
597 typedef png_int_32 png_fixed_point;
598
599 /* Add typedefs for pointers */
600 typedef void * png_voidp;
601 typedef const void * png_const_voidp;
602 typedef png_byte * png_bytep;
603 typedef const png_byte * png_const_bytep;
604 typedef png_uint_32 * png_uint_32p;
605 typedef const png_uint_32 * png_const_uint_32p;
606 typedef png_int_32 * png_int_32p;
607 typedef const png_int_32 * png_const_int_32p;
608 typedef png_uint_16 * png_uint_16p;
609 typedef const png_uint_16 * png_const_uint_16p;
610 typedef png_int_16 * png_int_16p;
611 typedef const png_int_16 * png_const_int_16p;
612 typedef char * png_charp;
613 typedef const char * png_const_charp;
614 typedef png_fixed_point * png_fixed_point_p;
615 typedef const png_fixed_point * png_const_fixed_point_p;
616 typedef size_t * png_size_tp;
617 typedef const size_t * png_const_size_tp;
618
619 #ifdef PNG_STDIO_SUPPORTED
620 typedef FILE * png_FILE_p;
621 #endif
622
623 #ifdef PNG_FLOATING_POINT_SUPPORTED
624 typedef double * png_doublep;
625 typedef const double * png_const_doublep;
626 #endif
627
628 /* Pointers to pointers; i.e. arrays */
629 typedef png_byte * * png_bytepp;
630 typedef png_uint_32 * * png_uint_32pp;
631 typedef png_int_32 * * png_int_32pp;
632 typedef png_uint_16 * * png_uint_16pp;
633 typedef png_int_16 * * png_int_16pp;
634 typedef const char * * png_const_charpp;
635 typedef char * * png_charpp;
636 typedef png_fixed_point * * png_fixed_point_pp;
637 #ifdef PNG_FLOATING_POINT_SUPPORTED
638 typedef double * * png_doublepp;
639 #endif
640
641 /* Pointers to pointers to pointers; i.e., pointer to array */
642 typedef char * * * png_charppp;
643
644 #endif /* PNG_BUILDING_SYMBOL_TABLE */
645
646 #endif /* PNGCONF_H */