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 /* pngconf.h - machine configurable file for libpng

  *

  * libpng version 1.6.10 - March 6, 2014

  *

  * Copyright (c) 1998-2013 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

 /* To do: Do all of this in scripts/pnglibconf.dfa */

 #ifdef PNG_SAFE_LIMITS_SUPPORTED

 #  ifdef PNG_USER_WIDTH_MAX

 #    undef PNG_USER_WIDTH_MAX

 #    define PNG_USER_WIDTH_MAX 1000000L

 #  endif

 #  ifdef PNG_USER_HEIGHT_MAX

 #    undef PNG_USER_HEIGHT_MAX

 #    define PNG_USER_HEIGHT_MAX 1000000L

 #  endif

 #  ifdef PNG_USER_CHUNK_MALLOC_MAX

 #    undef PNG_USER_CHUNK_MALLOC_MAX

 #    define PNG_USER_CHUNK_MALLOC_MAX 4000000L

 #  endif

 #  ifdef PNG_USER_CHUNK_CACHE_MAX

 #    undef PNG_USER_CHUNK_CACHE_MAX

 #    define PNG_USER_CHUNK_CACHE_MAX 128

 #  endif

 #endif

 #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 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), \

         extern 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__)

      /* 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 > 4294967294

    typedef unsigned int png_uint_32;

 #elif ULONG_MAX > 4294967294

    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 */