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1 
2 /* pngconf.h - machine configurable file for libpng
3  *
4  * libpng version 1.6.34, September 29, 2017
5  *
6  * Copyright (c) 1998-2002,2004,2006-2016 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  * Any machine specific code is near the front of this file, so if you
15  * are configuring libpng for a machine, you may want to read the section
16  * starting here down to where it starts to typedef png_color, png_text,
17  * and png_info.
18  */
19 
20 #ifndef PNGCONF_H
21 #define PNGCONF_H
22 
23 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
24 
25 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
26  * compiler for correct compilation.  The following header files are required by
27  * the standard.  If your compiler doesn't provide these header files, or they
28  * do not match the standard, you will need to provide/improve them.
29  */
30 #include <limits.h>
31 #include <stddef.h>
32 
33 /* Library header files.  These header files are all defined by ISOC90; libpng
34  * expects conformant implementations, however, an ISOC90 conformant system need
35  * not provide these header files if the functionality cannot be implemented.
36  * In this case it will be necessary to disable the relevant parts of libpng in
37  * the build of pnglibconf.h.
38  *
39  * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
40  * include this unnecessary header file.
41  */
42 
43 #ifdef PNG_STDIO_SUPPORTED
44    /* Required for the definition of FILE: */
45 #  include <stdio.h>
46 #endif
47 
48 #ifdef PNG_SETJMP_SUPPORTED
49    /* Required for the definition of jmp_buf and the declaration of longjmp: */
50 #  include <setjmp.h>
51 #endif
52 
53 #ifdef PNG_CONVERT_tIME_SUPPORTED
54    /* Required for struct tm: */
55 #  include <time.h>
56 #endif
57 
58 #endif /* PNG_BUILDING_SYMBOL_TABLE */
59 
60 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
61  * PNG_NO_CONST; this is no longer supported except for data declarations which
62  * apparently still cause problems in 2011 on some compilers.
63  */
64 #define PNG_CONST const /* backward compatibility only */
65 
66 /* This controls optimization of the reading of 16-bit and 32-bit values
67  * from PNG files.  It can be set on a per-app-file basis - it
68  * just changes whether a macro is used when the function is called.
69  * The library builder sets the default; if read functions are not
70  * built into the library the macro implementation is forced on.
71  */
72 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
73 #  define PNG_USE_READ_MACROS
74 #endif
75 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
76 #  if PNG_DEFAULT_READ_MACROS
77 #    define PNG_USE_READ_MACROS
78 #  endif
79 #endif
80 
81 /* COMPILER SPECIFIC OPTIONS.
82  *
83  * These options are provided so that a variety of difficult compilers
84  * can be used.  Some are fixed at build time (e.g. PNG_API_RULE
85  * below) but still have compiler specific implementations, others
86  * may be changed on a per-file basis when compiling against libpng.
87  */
88 
89 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
90  * against legacy (pre ISOC90) compilers that did not understand function
91  * prototypes.  It is not required for modern C compilers.
92  */
93 #ifndef PNGARG
94 #  define PNGARG(arglist) arglist
95 #endif
96 
97 /* Function calling conventions.
98  * =============================
99  * Normally it is not necessary to specify to the compiler how to call
100  * a function - it just does it - however on x86 systems derived from
101  * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
102  * and some others) there are multiple ways to call a function and the
103  * default can be changed on the compiler command line.  For this reason
104  * libpng specifies the calling convention of every exported function and
105  * every function called via a user supplied function pointer.  This is
106  * done in this file by defining the following macros:
107  *
108  * PNGAPI    Calling convention for exported functions.
109  * PNGCBAPI  Calling convention for user provided (callback) functions.
110  * PNGCAPI   Calling convention used by the ANSI-C library (required
111  *           for longjmp callbacks and sometimes used internally to
112  *           specify the calling convention for zlib).
113  *
114  * These macros should never be overridden.  If it is necessary to
115  * change calling convention in a private build this can be done
116  * by setting PNG_API_RULE (which defaults to 0) to one of the values
117  * below to select the correct 'API' variants.
118  *
119  * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
120  *                This is correct in every known environment.
121  * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
122  *                the 'C' calling convention (from PNGCAPI) for
123  *                callbacks (PNGCBAPI).  This is no longer required
124  *                in any known environment - if it has to be used
125  *                please post an explanation of the problem to the
126  *                libpng mailing list.
127  *
128  * These cases only differ if the operating system does not use the C
129  * calling convention, at present this just means the above cases
130  * (x86 DOS/Windows sytems) and, even then, this does not apply to
131  * Cygwin running on those systems.
132  *
133  * Note that the value must be defined in pnglibconf.h so that what
134  * the application uses to call the library matches the conventions
135  * set when building the library.
136  */
137 
138 /* Symbol export
139  * =============
140  * When building a shared library it is almost always necessary to tell
141  * the compiler which symbols to export.  The png.h macro 'PNG_EXPORT'
142  * is used to mark the symbols.  On some systems these symbols can be
143  * extracted at link time and need no special processing by the compiler,
144  * on other systems the symbols are flagged by the compiler and just
145  * the declaration requires a special tag applied (unfortunately) in a
146  * compiler dependent way.  Some systems can do either.
147  *
148  * A small number of older systems also require a symbol from a DLL to
149  * be flagged to the program that calls it.  This is a problem because
150  * we do not know in the header file included by application code that
151  * the symbol will come from a shared library, as opposed to a statically
152  * linked one.  For this reason the application must tell us by setting
153  * the magic flag PNG_USE_DLL to turn on the special processing before
154  * it includes png.h.
155  *
156  * Four additional macros are used to make this happen:
157  *
158  * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
159  *            the build or imported if PNG_USE_DLL is set - compiler
160  *            and system specific.
161  *
162  * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
163  *                       'type', compiler specific.
164  *
165  * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
166  *                make a symbol exported from the DLL.  Not used in the
167  *                public header files; see pngpriv.h for how it is used
168  *                in the libpng build.
169  *
170  * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
171  *                from a DLL - used to define PNG_IMPEXP when
172  *                PNG_USE_DLL is set.
173  */
174 
175 /* System specific discovery.
176  * ==========================
177  * This code is used at build time to find PNG_IMPEXP, the API settings
178  * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
179  * import processing is possible.  On Windows systems it also sets
180  * compiler-specific macros to the values required to change the calling
181  * conventions of the various functions.
182  */
183 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
184     defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
185   /* Windows system (DOS doesn't support DLLs).  Includes builds under Cygwin or
186    * MinGW on any architecture currently supported by Windows.  Also includes
187    * Watcom builds but these need special treatment because they are not
188    * compatible with GCC or Visual C because of different calling conventions.
189    */
190 #  if PNG_API_RULE == 2
191    /* If this line results in an error, either because __watcall is not
192     * understood or because of a redefine just below you cannot use *this*
193     * build of the library with the compiler you are using.  *This* build was
194     * build using Watcom and applications must also be built using Watcom!
195     */
196 #    define PNGCAPI __watcall
197 #  endif
198 
199 #  if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
200 #    define PNGCAPI __cdecl
201 #    if PNG_API_RULE == 1
202    /* If this line results in an error __stdcall is not understood and
203     * PNG_API_RULE should not have been set to '1'.
204     */
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 
220   /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
221 
222 #  if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
223 #     error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
224 #  endif
225 
226 #  if (defined(_MSC_VER) && _MSC_VER < 800) ||\
227       (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
228    /* older Borland and MSC
229     * compilers used '__export' and required this to be after
230     * the type.
231     */
232 #    ifndef PNG_EXPORT_TYPE
233 #      define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
234 #    endif
235 #    define PNG_DLL_EXPORT __export
236 #  else /* newer compiler */
237 #    define PNG_DLL_EXPORT __declspec(dllexport)
238 #    ifndef PNG_DLL_IMPORT
239 #      define PNG_DLL_IMPORT __declspec(dllimport)
240 #    endif
241 #  endif /* compiler */
242 
243 #else /* !Windows */
244 #  if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
245 #    define PNGAPI _System
246 #  else /* !Windows/x86 && !OS/2 */
247    /* Use the defaults, or define PNG*API on the command line (but
248     * this will have to be done for every compile!)
249     */
250 #  endif /* other system, !OS/2 */
251 #endif /* !Windows/x86 */
252 
253 /* Now do all the defaulting . */
254 #ifndef PNGCAPI
255 #  define PNGCAPI
256 #endif
257 #ifndef PNGCBAPI
258 #  define PNGCBAPI PNGCAPI
259 #endif
260 #ifndef PNGAPI
261 #  define PNGAPI PNGCAPI
262 #endif
263 
264 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
265  * then in an internal header file when building the library, otherwise (when
266  * using the library) it is set here.
267  */
268 #ifndef PNG_IMPEXP
269 #  if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
270    /* This forces use of a DLL, disallowing static linking */
271 #    define PNG_IMPEXP PNG_DLL_IMPORT
272 #  endif
273 
274 #  ifndef PNG_IMPEXP
275 #    define PNG_IMPEXP
276 #  endif
277 #endif
278 
279 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
280  * 'attributes' as a storage class - the attributes go at the start of the
281  * function definition, and attributes are always appended regardless of the
282  * compiler.  This considerably simplifies these macros but may cause problems
283  * if any compilers both need function attributes and fail to handle them as
284  * a storage class (this is unlikely.)
285  */
286 #ifndef PNG_FUNCTION
287 #  define PNG_FUNCTION(type, name, args, attributes) attributes type name args
288 #endif
289 
290 #ifndef PNG_EXPORT_TYPE
291 #  define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
292 #endif
293 
294    /* The ordinal value is only relevant when preprocessing png.h for symbol
295     * table entries, so we discard it here.  See the .dfn files in the
296     * scripts directory.
297     */
298 
299 #ifndef PNG_EXPORTA
300 #  define PNG_EXPORTA(ordinal, type, name, args, attributes) \
301       PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
302       PNG_LINKAGE_API attributes)
303 #endif
304 
305 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
306  * so make something non-empty to satisfy the requirement:
307  */
308 #define PNG_EMPTY /*empty list*/
309 
310 #define PNG_EXPORT(ordinal, type, name, args) \
311    PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
312 
313 /* Use PNG_REMOVED to comment out a removed interface. */
314 #ifndef PNG_REMOVED
315 #  define PNG_REMOVED(ordinal, type, name, args, attributes)
316 #endif
317 
318 #ifndef PNG_CALLBACK
319 #  define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
320 #endif
321 
322 /* Support for compiler specific function attributes.  These are used
323  * so that where compiler support is available incorrect use of API
324  * functions in png.h will generate compiler warnings.
325  *
326  * Added at libpng-1.2.41.
327  */
328 
329 #ifndef PNG_NO_PEDANTIC_WARNINGS
330 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
331 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
332 #  endif
333 #endif
334 
335 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
336   /* Support for compiler specific function attributes.  These are used
337    * so that where compiler support is available, incorrect use of API
338    * functions in png.h will generate compiler warnings.  Added at libpng
339    * version 1.2.41.  Disabling these removes the warnings but may also produce
340    * less efficient code.
341    */
342 #  if defined(__clang__) && defined(__has_attribute)
343    /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
344 #    if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
345 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
346 #    endif
347 #    if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
348 #      define PNG_NORETURN __attribute__((__noreturn__))
349 #    endif
350 #    if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
351 #      define PNG_ALLOCATED __attribute__((__malloc__))
352 #    endif
353 #    if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
354 #      define PNG_DEPRECATED __attribute__((__deprecated__))
355 #    endif
356 #    if !defined(PNG_PRIVATE)
357 #      ifdef __has_extension
358 #        if __has_extension(attribute_unavailable_with_message)
359 #          define PNG_PRIVATE __attribute__((__unavailable__(\
360              "This function is not exported by libpng.")))
361 #        endif
362 #      endif
363 #    endif
364 #    ifndef PNG_RESTRICT
365 #      define PNG_RESTRICT __restrict
366 #    endif
367 
368 #  elif defined(__GNUC__)
369 #    ifndef PNG_USE_RESULT
370 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
371 #    endif
372 #    ifndef PNG_NORETURN
373 #      define PNG_NORETURN   __attribute__((__noreturn__))
374 #    endif
375 #    if __GNUC__ >= 3
376 #      ifndef PNG_ALLOCATED
377 #        define PNG_ALLOCATED  __attribute__((__malloc__))
378 #      endif
379 #      ifndef PNG_DEPRECATED
380 #        define PNG_DEPRECATED __attribute__((__deprecated__))
381 #      endif
382 #      ifndef PNG_PRIVATE
383 #        if 0 /* Doesn't work so we use deprecated instead*/
384 #          define PNG_PRIVATE \
385             __attribute__((warning("This function is not exported by libpng.")))
386 #        else
387 #          define PNG_PRIVATE \
388             __attribute__((__deprecated__))
389 #        endif
390 #      endif
391 #      if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
392 #        ifndef PNG_RESTRICT
393 #          define PNG_RESTRICT __restrict
394 #        endif
395 #      endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
396 #    endif /* __GNUC__ >= 3 */
397 
398 #  elif defined(_MSC_VER)  && (_MSC_VER >= 1300)
399 #    ifndef PNG_USE_RESULT
400 #      define PNG_USE_RESULT /* not supported */
401 #    endif
402 #    ifndef PNG_NORETURN
403 #      define PNG_NORETURN   __declspec(noreturn)
404 #    endif
405 #    ifndef PNG_ALLOCATED
406 #      if (_MSC_VER >= 1400)
407 #        define PNG_ALLOCATED __declspec(restrict)
408 #      endif
409 #    endif
410 #    ifndef PNG_DEPRECATED
411 #      define PNG_DEPRECATED __declspec(deprecated)
412 #    endif
413 #    ifndef PNG_PRIVATE
414 #      define PNG_PRIVATE __declspec(deprecated)
415 #    endif
416 #    ifndef PNG_RESTRICT
417 #      if (_MSC_VER >= 1400)
418 #        define PNG_RESTRICT __restrict
419 #      endif
420 #    endif
421 
422 #  elif defined(__WATCOMC__)
423 #    ifndef PNG_RESTRICT
424 #      define PNG_RESTRICT __restrict
425 #    endif
426 #  endif
427 #endif /* PNG_PEDANTIC_WARNINGS */
428 
429 #ifndef PNG_DEPRECATED
430 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
431 #endif
432 #ifndef PNG_USE_RESULT
433 #  define PNG_USE_RESULT  /* The result of this function must be checked */
434 #endif
435 #ifndef PNG_NORETURN
436 #  define PNG_NORETURN    /* This function does not return */
437 #endif
438 #ifndef PNG_ALLOCATED
439 #  define PNG_ALLOCATED   /* The result of the function is new memory */
440 #endif
441 #ifndef PNG_PRIVATE
442 #  define PNG_PRIVATE     /* This is a private libpng function */
443 #endif
444 #ifndef PNG_RESTRICT
445 #  define PNG_RESTRICT    /* The C99 "restrict" feature */
446 #endif
447 
448 #ifndef PNG_FP_EXPORT     /* A floating point API. */
449 #  ifdef PNG_FLOATING_POINT_SUPPORTED
450 #     define PNG_FP_EXPORT(ordinal, type, name, args)\
451          PNG_EXPORT(ordinal, type, name, args);
452 #  else                   /* No floating point APIs */
453 #     define PNG_FP_EXPORT(ordinal, type, name, args)
454 #  endif
455 #endif
456 #ifndef PNG_FIXED_EXPORT  /* A fixed point API. */
457 #  ifdef PNG_FIXED_POINT_SUPPORTED
458 #     define PNG_FIXED_EXPORT(ordinal, type, name, args)\
459          PNG_EXPORT(ordinal, type, name, args);
460 #  else                   /* No fixed point APIs */
461 #     define PNG_FIXED_EXPORT(ordinal, type, name, args)
462 #  endif
463 #endif
464 
465 #ifndef PNG_BUILDING_SYMBOL_TABLE
466 /* Some typedefs to get us started.  These should be safe on most of the common
467  * platforms.
468  *
469  * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
470  * 32-bit value however this is not normally advisable.
471  *
472  * png_uint_16 and png_int_16 should always be two bytes in size - this is
473  * verified at library build time.
474  *
475  * png_byte must always be one byte in size.
476  *
477  * The checks below use constants from limits.h, as defined by the ISOC90
478  * standard.
479  */
480 #if CHAR_BIT == 8 && UCHAR_MAX == 255
481    typedef unsigned char png_byte;
482 #else
483 #  error "libpng requires 8-bit bytes"
484 #endif
485 
486 #if INT_MIN == -32768 && INT_MAX == 32767
487    typedef int png_int_16;
488 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
489    typedef short png_int_16;
490 #else
491 #  error "libpng requires a signed 16-bit type"
492 #endif
493 
494 #if UINT_MAX == 65535
495    typedef unsigned int png_uint_16;
496 #elif USHRT_MAX == 65535
497    typedef unsigned short png_uint_16;
498 #else
499 #  error "libpng requires an unsigned 16-bit type"
500 #endif
501 
502 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
503    typedef int png_int_32;
504 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
505    typedef long int png_int_32;
506 #else
507 #  error "libpng requires a signed 32-bit (or more) type"
508 #endif
509 
510 #if UINT_MAX > 4294967294U
511    typedef unsigned int png_uint_32;
512 #elif ULONG_MAX > 4294967294U
513    typedef unsigned long int png_uint_32;
514 #else
515 #  error "libpng requires an unsigned 32-bit (or more) type"
516 #endif
517 
518 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
519  * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
520  */
521 typedef size_t png_size_t;
522 typedef ptrdiff_t png_ptrdiff_t;
523 
524 /* libpng needs to know the maximum value of 'size_t' and this controls the
525  * definition of png_alloc_size_t, below.  This maximum value of size_t limits
526  * but does not control the maximum allocations the library makes - there is
527  * direct application control of this through png_set_user_limits().
528  */
529 #ifndef PNG_SMALL_SIZE_T
530    /* Compiler specific tests for systems where size_t is known to be less than
531     * 32 bits (some of these systems may no longer work because of the lack of
532     * 'far' support; see above.)
533     */
534 #  if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
535    (defined(_MSC_VER) && defined(MAXSEG_64K))
536 #     define PNG_SMALL_SIZE_T
537 #  endif
538 #endif
539 
540 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
541  * smaller than png_uint_32.  Casts from png_size_t or png_uint_32 to
542  * png_alloc_size_t are not necessary; in fact, it is recommended not to use
543  * them at all so that the compiler can complain when something turns out to be
544  * problematic.
545  *
546  * Casts in the other direction (from png_alloc_size_t to png_size_t or
547  * png_uint_32) should be explicitly applied; however, we do not expect to
548  * encounter practical situations that require such conversions.
549  *
550  * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
551  * 4294967295 - i.e. less than the maximum value of png_uint_32.
552  */
553 #ifdef PNG_SMALL_SIZE_T
554    typedef png_uint_32 png_alloc_size_t;
555 #else
556    typedef png_size_t png_alloc_size_t;
557 #endif
558 
559 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
560  * implementations of Intel CPU specific support of user-mode segmented address
561  * spaces, where 16-bit pointers address more than 65536 bytes of memory using
562  * separate 'segment' registers.  The implementation requires two different
563  * types of pointer (only one of which includes the segment value.)
564  *
565  * If required this support is available in version 1.2 of libpng and may be
566  * available in versions through 1.5, although the correctness of the code has
567  * not been verified recently.
568  */
569 
570 /* Typedef for floating-point numbers that are converted to fixed-point with a
571  * multiple of 100,000, e.g., gamma
572  */
573 typedef png_int_32 png_fixed_point;
574 
575 /* Add typedefs for pointers */
576 typedef void                  * png_voidp;
577 typedef const void            * png_const_voidp;
578 typedef png_byte              * png_bytep;
579 typedef const png_byte        * png_const_bytep;
580 typedef png_uint_32           * png_uint_32p;
581 typedef const png_uint_32     * png_const_uint_32p;
582 typedef png_int_32            * png_int_32p;
583 typedef const png_int_32      * png_const_int_32p;
584 typedef png_uint_16           * png_uint_16p;
585 typedef const png_uint_16     * png_const_uint_16p;
586 typedef png_int_16            * png_int_16p;
587 typedef const png_int_16      * png_const_int_16p;
588 typedef char                  * png_charp;
589 typedef const char            * png_const_charp;
590 typedef png_fixed_point       * png_fixed_point_p;
591 typedef const png_fixed_point * png_const_fixed_point_p;
592 typedef png_size_t            * png_size_tp;
593 typedef const png_size_t      * png_const_size_tp;
594 
595 #ifdef PNG_STDIO_SUPPORTED
596 typedef FILE            * png_FILE_p;
597 #endif
598 
599 #ifdef PNG_FLOATING_POINT_SUPPORTED
600 typedef double       * png_doublep;
601 typedef const double * png_const_doublep;
602 #endif
603 
604 /* Pointers to pointers; i.e. arrays */
605 typedef png_byte        * * png_bytepp;
606 typedef png_uint_32     * * png_uint_32pp;
607 typedef png_int_32      * * png_int_32pp;
608 typedef png_uint_16     * * png_uint_16pp;
609 typedef png_int_16      * * png_int_16pp;
610 typedef const char      * * png_const_charpp;
611 typedef char            * * png_charpp;
612 typedef png_fixed_point * * png_fixed_point_pp;
613 #ifdef PNG_FLOATING_POINT_SUPPORTED
614 typedef double          * * png_doublepp;
615 #endif
616 
617 /* Pointers to pointers to pointers; i.e., pointer to array */
618 typedef char            * * * png_charppp;
619 
620 #endif /* PNG_BUILDING_SYMBOL_TABLE */
621 
622 #endif /* PNGCONF_H */
623