WebSVN – Kolibri OS – Diff – /programs/develop/libraries/libpng/pngconf.h

 /* pngconf.h - machine configurable file for libpng
+ *
- * libpng version 1.5.1 - February 3, 2011
+ * libpng version 1.6.5 - September 14, 2013
+ *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * 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
 #ifndef PNGCONF_H
 #define PNGCONF_H
+/* To do: Do all of this in scripts/pnglibconf.dfa */
+#ifdef PNG_SAFE_LIMITS_SUPPORTED
-/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
+#  ifdef PNG_USER_WIDTH_MAX
- * definition file for  machine specific limits, this may impact the
+#    undef PNG_USER_WIDTH_MAX
- * correctness of the definitons below (see uses of INT_MAX).
+#    define PNG_USER_WIDTH_MAX 1000000L
- */
+#  endif
+#  ifdef PNG_USER_HEIGHT_MAX
+#    undef PNG_USER_HEIGHT_MAX
-#ifndef PNG_NO_LIMITS_H
+#    define PNG_USER_HEIGHT_MAX 1000000L
+#  endif
+#  ifdef PNG_USER_CHUNK_MALLOC_MAX
+#    undef PNG_USER_CHUNK_MALLOC_MAX
-#  include
+#    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 */
-#endif
+/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
-/* For the memory copy APIs (i.e. the standard definitions of these),
+ * compiler for correct compilation.  The following header files are required by
- * because this file defines png_memcpy and so on the base APIs must
+ * the standard.  If your compiler doesn't provide these header files, or they
- * be defined here.
- */
+ * do not match the standard, you will need to provide/improve them.
-#ifdef BSD
-#  include
+ */
-#else
+#include
+#include
-#  include
+/* Library header files.  These header files are all defined by ISOC90; libpng
+ * expects conformant implementations, however, an ISOC90 conformant system need
-#endif
+ * 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
-/* For png_FILE_p - this provides the standard definition of a
+ * include this unnecessary header file.
+ */
  * FILE
- */
+#ifdef PNG_STDIO_SUPPORTED
+   /* Required for the definition of FILE: */
+#  include
+#endif
+#ifdef PNG_SETJMP_SUPPORTED
+   /* Required for the definition of jmp_buf and the declaration of longjmp: */
+#  include
+#endif
+#ifdef PNG_CONVERT_tIME_SUPPORTED
+   /* Required for struct tm: */
+#  include
+#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
-#ifdef PNG_STDIO_SUPPORTED
+ * apparently still cause problems in 2011 on some compilers.
-#  include
+ */
-#endif
+#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 to the function is called.
+ * just changes whether a macro is used when the function is called.
- * The library builder sets the default, if read functions are not
+ * The library builder sets the default; if read functions are not
  * built into the library the macro implementation is forced on.
  * below) but still have compiler specific implementations, others
  * may be changed on a per-file basis when compiling against libpng.
  */
-/* The PNGARG macro protects us against machines that don't have function
+/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
- * prototypes (ie K&R style headers).  If your compiler does not handle
+ * against legacy (pre ISOC90) compilers that did not understand function
- * function prototypes, define this macro and use the included ansi2knr.
+ * prototypes.  It is not required for modern C compilers.
- * I've always been able to use _NO_PROTO as the indicator, but you may
- * need to drag the empty declaration out in front of here, or change the
- * ifdef to suit your own needs.
  */
 #ifndef PNGARG
-#  ifdef OF /* zlib prototype munger */
-#    define PNGARG(arglist) OF(arglist)
-#  else
-#    ifdef _NO_PROTO
-#      define PNGARG(arglist) ()
-#    else
-#      define PNGARG(arglist) arglist
+#  define PNGARG(arglist) arglist
-#    endif /* _NO_PROTO */
-#  endif /* OF */
+#endif
-#endif /* PNGARG */
 /* Function calling conventions.
  * =============================
  * Normally it is not necessary to specify to the compiler how to call
  * 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.
+ *                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/x86 systems it also sets
+ * 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) ||\
+#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
-      defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
+    defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
-    ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
-      defined(_M_X64) || defined(_M_IA64) )
-  /* Windows system (DOS doesn't support DLLs) running on x86/x64.  Includes
+  /* Windows system (DOS doesn't support DLLs).  Includes builds under Cygwin or
-   * builds under Cygwin or MinGW.  Also includes Watcom builds but these need
+   * MinGW on any architecture currently supported by Windows.  Also includes
-   * special treatment because they are not compatible with GCC or Visual C
+   * Watcom builds but these need special treatment because they are not
-   * because of different calling conventions.
+   * 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
-#  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+#  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
 #    if PNG_API_RULE == 1 && !defined(PNGAPI)
 #      define PNGAPI _stdcall
 #    endif
 #  endif /* compiler/api */
   /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
+  /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
 #  if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
-   ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
+#     error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
 #  endif
 #  if (defined(_MSC_VER) && _MSC_VER < 800) ||\
       (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
 #      define PNG_DLL_IMPORT __declspec(dllimport)
 #    endif
 #  endif /* compiler */
-#else /* !Windows/x86 */
+#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!)
 #ifndef PNGAPI
 #  define PNGAPI PNGCAPI
 #endif
+/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
-/* The default for PNG_IMPEXP depends on whether the library is
+ * then in an internal header file when building the library, otherwise (when
- * being built or used.
+ * using the library) it is set here.
  */
 #ifndef PNG_IMPEXP
-#  ifdef PNGLIB_BUILD
-    /* Building the library */
-#    if (defined(DLL_EXPORT)/*from libtool*/ ||\
-        defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\
-        defined(_USRDLL) ||\
-        defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT)
-      /* Building a DLL. */
-#      define PNG_IMPEXP PNG_DLL_EXPORT
-#    endif /* DLL */
-#  else
-    /* Using the library */
-#    if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
+#  if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
-      /* This forces use of a DLL, disallowing static linking */
+     /* This forces use of a DLL, disallowing static linking */
-#      define PNG_IMPEXP PNG_DLL_IMPORT
+#    define PNG_IMPEXP PNG_DLL_IMPORT
-#    endif
+#  endif
-#  endif
 #  ifndef PNG_IMPEXP
 #    define PNG_IMPEXP
 #  endif
+#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
-/* THe following complexity is concerned with getting the 'attributes' of the
+ * compiler.  This considerably simplifies these macros but may cause problems
- * declared function in the correct place.  This potentially requires a separate
+ * if any compilers both need function attributes and fail to handle them as
- * PNG_EXPORT function for every compiler.
+ * a storage class (this is unlikely.)
- */
-#ifndef PNG_FUNCTION
+ */
-#  ifdef __GNUC__
-#     define PNG_FUNCTION(type, name, args, attributes)\
-         attributes type name args
-#  else /* !GNUC */
-#     ifdef _MSC_VER
-#        define PNG_FUNCTION(type, name, args, attributes)\
-         attributes type name args
-#     else /* !MSC */
-#        define PNG_FUNCTION(type, name, args, attributes)\
-            type name args
-#     endif
+#ifndef PNG_FUNCTION
-#  endif
+#  define PNG_FUNCTION(type, name, args, attributes) attributes type name args
 #endif
     * 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)\
+#  define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-      extern PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args),\
+      PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
-         attributes)
+        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_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, attributes)\
+#ifndef PNG_CALLBACK
-   type (PNGCBAPI name) PNGARG(args) attributes
+#  define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
 #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
+   * 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
-   * version 1.2.41.
+   * less efficient code.
    */
-#  ifdef __GNUC__
+#  if defined(__GNUC__)
 #    ifndef PNG_USE_RESULT
 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
 #    endif
 #    ifndef PNG_NORETURN
 #      define PNG_NORETURN   __attribute__((__noreturn__))
 #    endif
-#    ifndef PNG_PTR_NORETURN
+#    if __GNUC__ >= 3
-#      define PNG_PTR_NORETURN   __attribute__((__noreturn__))
-#    endif
-#    ifndef PNG_ALLOCATED
+#      ifndef PNG_ALLOCATED
-#      define PNG_ALLOCATED  __attribute__((__malloc__))
+#        define PNG_ALLOCATED  __attribute__((__malloc__))
-#    endif
+#      endif
-    /* This specifically protects structure members that should only be
-     * accessed from within the library, therefore should be empty during
-     * a library build.
-     */
-#    ifndef PNGLIB_BUILD
 #      ifndef PNG_DEPRECATED
 #        define PNG_DEPRECATED __attribute__((__deprecated__))
 #      endif
-#      ifndef PNG_DEPSTRUCT
-#        define PNG_DEPSTRUCT  __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))
-#      endif /* PNG_PRIVATE */
+#        ifndef PNG_RESTRICT
+#          define PNG_RESTRICT __restrict
+#        endif
-#    endif /* PNGLIB_BUILD */
+#      endif /*  __GNUC__ == 3.0 */
-#  endif /* __GNUC__ */
+#    endif /*  __GNUC__ >= 3 */
-#  ifdef _MSC_VER /* may need to check value */
+#  elif defined(_MSC_VER)  && (_MSC_VER >= 1300)
 #    ifndef PNG_USE_RESULT
-#      define PNG_USE_RESULT /*not supported*/
+#      define PNG_USE_RESULT /* not supported */
 #    endif
 #    ifndef PNG_NORETURN
 #      define PNG_NORETURN   __declspec(noreturn)
 #    endif
-#    ifndef PNG_PTR_NORETURN
-#      define PNG_PTR_NORETURN /*not supported*/
-#    endif
 #    ifndef PNG_ALLOCATED
+#      if (_MSC_VER >= 1400)
-#      define PNG_ALLOCATED __declspec(restrict)
+#        define PNG_ALLOCATED __declspec(restrict)
-#    endif
+#      endif
-    /* This specifically protects structure members that should only be
-     * accessed from within the library, therefore should be empty during
-     * a library build.
-     */
+#    endif
-#    ifndef PNGLIB_BUILD
-#      ifndef PNG_DEPRECATED
+#    ifndef PNG_DEPRECATED
-#        define PNG_DEPRECATED __declspec(deprecated)
+#      define PNG_DEPRECATED __declspec(deprecated)
-#      endif
+#    endif
-#      ifndef PNG_DEPSTRUCT
-#        define PNG_DEPSTRUCT  __declspec(deprecated)
-#      endif
-#      ifndef PNG_PRIVATE
+#    ifndef PNG_PRIVATE
-#        define PNG_PRIVATE __declspec(deprecated)
+#      define PNG_PRIVATE __declspec(deprecated)
+#    endif
-#      endif /* PNG_PRIVATE */
+#    ifndef PNG_RESTRICT
+#      if (_MSC_VER >= 1400)
+#        define PNG_RESTRICT __restrict
+#      endif
+#    endif
+#  elif defined(__WATCOMC__)
-#    endif /* PNGLIB_BUILD */
+#    ifndef PNG_RESTRICT
+#      define PNG_RESTRICT __restrict
+#    endif
-#  endif /* __GNUC__ */
+#  endif /* _MSC_VER */
 #endif /* PNG_PEDANTIC_WARNINGS */
 #ifndef PNG_DEPRECATED
 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
 #endif
 #ifndef PNG_ALLOCATED
 #  define PNG_ALLOCATED   /* The result of the function is new memory */
 #endif
-#ifndef PNG_DEPSTRUCT
+#ifndef PNG_PRIVATE
-#  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
-#endif
-#ifndef PNG_PRIVATE
 #  define PNG_PRIVATE     /* This is a private libpng function */
 #endif
-#ifndef PNG_FP_EXPORT     /* A floating point API. */
+#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)
+         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)
+         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
-/* The following uses const char * instead of char * for error
+/* Some typedefs to get us started.  These should be safe on most of the common
+ * platforms.
+ *
- * and warning message functions, so some compilers won't complain.
+ * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
- * If you do not want to use const, define PNG_NO_CONST here.
+ * 32-bit value however this is not normally advisable.
  *
- * This should not change how the APIs are called, so it can be done
+ * png_uint_16 and png_int_16 should always be two bytes in size - this is
- * on a per-file basis in the application.
+ * 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
-#ifndef PNG_CONST
+ * standard.
+ */
-#  ifndef PNG_NO_CONST
+#if CHAR_BIT == 8 && UCHAR_MAX == 255
-#    define PNG_CONST const
+   typedef unsigned char png_byte;
-#  else
+#else
-#    define PNG_CONST
+#  error "libpng requires 8 bit bytes"
-#  endif
 #endif
-/* Some typedefs to get us started.  These should be safe on most of the
- * common platforms.  The typedefs should be at least as large as the
- * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
- * don't have to be exactly that size.  Some compilers dislike passing
- * unsigned shorts as function parameters, so you may be better off using
+#if INT_MIN == -32768 && INT_MAX == 32767
- * unsigned int for png_uint_16.
- */
+   typedef int png_int_16;
-#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
-typedef unsigned int png_uint_32;
+#elif SHRT_MIN == -32768 && SHRT_MAX == 32767
-typedef int png_int_32;
+   typedef short png_int_16;
 #else
-typedef unsigned long png_uint_32;
-typedef long png_int_32;
+#  error "libpng requires a signed 16 bit type"
-#endif
-typedef unsigned short png_uint_16;
-typedef short png_int_16;
-typedef unsigned char png_byte;
+#endif
+#if UINT_MAX == 65535
+   typedef unsigned int png_uint_16;
-#ifdef PNG_NO_SIZE_T
+#elif USHRT_MAX == 65535
-typedef unsigned int png_size_t;
+   typedef unsigned short png_uint_16;
 #else
-typedef size_t png_size_t;
-#endif
-#define png_sizeof(x) (sizeof (x))
-/* The following is needed for medium model support.  It cannot be in the
- * pngpriv.h header.  Needs modification for other compilers besides
- * MSC.  Model independent support declares all arrays and pointers to be
- * large using the far keyword.  The zlib version used must also support
+#  error "libpng requires an unsigned 16 bit type"
- * model independent data.  As of version zlib 1.0.4, the necessary changes
- * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
- * changes that are needed. (Tim Wegner)
- */
+#endif
-/* Separate compiler dependencies (problem here is that zlib.h always
- * defines FAR. (SJT)
- */
+#if INT_MIN < -2147483646 && INT_MAX > 2147483646
-#ifdef __BORLANDC__
+   typedef int png_int_32;
-#  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
-#    define LDATA 1
-#  else
+#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
-#    define LDATA 0
-#  endif
-  /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
-#  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
-#    define PNG_MAX_MALLOC_64K /* only used in build */
-#    if (LDATA != 1)
+   typedef long int png_int_32;
-#      ifndef FAR
-#        define FAR __far
-#      endif
-#      define USE_FAR_KEYWORD
-#    endif   /* LDATA != 1 */
-         /* Possibly useful for moving data out of default segment.
-          * Uncomment it if you want. Could also define FARDATA as
-          * const if your compiler supports it. (SJT)
-#        define FARDATA FAR
+#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;
-#  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
+#else
-#endif   /* __BORLANDC__ */
 #  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;
-/* Suggest testing for specific compiler first before testing for
+typedef ptrdiff_t png_ptrdiff_t;
- * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
+/* 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
- * making reliance oncertain keywords suspect. (SJT)
+ * 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
-/* MSC Medium model */
+    * 32 bits (some of these systems may no longer work because of the lack of
-#ifdef FAR
+    * 'far' support; see above.)
+    */
+#  if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
+   (defined(_MSC_VER) && defined(MAXSEG_64K))
+#     define PNG_SMALL_SIZE_T
-#  ifdef M_I86MM
+#  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.
+ *
-#    define USE_FAR_KEYWORD
+ * 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
-#    define FARDATA FAR
+ * encounter practical situations that require such conversions.
+ *
-#    include
+ * 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;
-#  endif
+#else
-#endif
+   typedef png_size_t png_alloc_size_t;
+#endif
+/* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
-/* SJT: default case */
+ * implementations of Intel CPU specific support of user-mode segmented address
-#ifndef FAR
+ * spaces, where 16-bit pointers address more than 65536 bytes of memory using
-#  define FAR
+ * separate 'segment' registers.  The implementation requires two different
-#endif
+ * types of pointer (only one of which includes the segment value.)
+ *
-/* At this point FAR is always defined */
+ * If required this support is available in version 1.2 of libpng and may be
-#ifndef FARDATA
+ * available in versions through 1.5, although the correctness of the code has
-#  define FARDATA
+ * not been verified recently.
-#endif
+ */
-/* Typedef for floating-point numbers that are converted
+/* Typedef for floating-point numbers that are converted to fixed-point with a
- * to fixed-point with a multiple of 100,000, e.g., gamma
+ * multiple of 100,000, e.g., gamma
  */
 typedef png_int_32 png_fixed_point;
 /* Add typedefs for pointers */
-typedef void                      FAR * png_voidp;
+typedef void                  * png_voidp;
-typedef PNG_CONST void            FAR * png_const_voidp;
+typedef const void            * png_const_voidp;
-typedef png_byte                  FAR * png_bytep;
+typedef png_byte              * png_bytep;
-typedef PNG_CONST png_byte        FAR * png_const_bytep;
+typedef const png_byte        * png_const_bytep;
-typedef png_uint_32               FAR * png_uint_32p;
+typedef png_uint_32           * png_uint_32p;
-typedef PNG_CONST png_uint_32     FAR * png_const_uint_32p;
+typedef const png_uint_32     * png_const_uint_32p;
-typedef png_int_32                FAR * png_int_32p;
+typedef png_int_32            * png_int_32p;
-typedef PNG_CONST png_int_32      FAR * png_const_int_32p;
+typedef const png_int_32      * png_const_int_32p;
-typedef png_uint_16               FAR * png_uint_16p;
+typedef png_uint_16           * png_uint_16p;
-typedef PNG_CONST png_uint_16     FAR * png_const_uint_16p;
+typedef const png_uint_16     * png_const_uint_16p;
-typedef png_int_16                FAR * png_int_16p;
+typedef png_int_16            * png_int_16p;
-typedef PNG_CONST png_int_16      FAR * png_const_int_16p;
+typedef const png_int_16      * png_const_int_16p;
-typedef char                      FAR * png_charp;
+typedef char                  * png_charp;
-typedef PNG_CONST char            FAR * png_const_charp;
+typedef const char            * png_const_charp;
-typedef png_fixed_point           FAR * png_fixed_point_p;
+typedef png_fixed_point       * png_fixed_point_p;
-typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
+typedef const png_fixed_point * png_const_fixed_point_p;
-typedef png_size_t                FAR * png_size_tp;
+typedef png_size_t            * png_size_tp;
-typedef PNG_CONST png_size_t      FAR * png_const_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           FAR * png_doublep;
+typedef double       * png_doublep;
-typedef PNG_CONST double FAR * png_const_doublep;
+typedef const double * png_const_doublep;
 #endif
 /* Pointers to pointers; i.e. arrays */
-typedef png_byte        FAR * FAR * png_bytepp;
-typedef png_uint_32     FAR * FAR * png_uint_32pp;
-typedef png_int_32      FAR * FAR * png_int_32pp;
-typedef png_uint_16     FAR * FAR * png_uint_16pp;
-typedef png_int_16      FAR * FAR * png_int_16pp;
-typedef PNG_CONST char  FAR * FAR * png_const_charpp;
-typedef char            FAR * FAR * png_charpp;
-typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-typedef double          FAR * FAR * png_doublepp;
+typedef png_byte        * * png_bytepp;
-#endif
-/* Pointers to pointers to pointers; i.e., pointer to array */
-typedef char            FAR * FAR * FAR * png_charppp;
-/* 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.
- */
-#if defined(__TURBOC__) && !defined(__FLAT__)
-   typedef unsigned long png_alloc_size_t;
-#else
-#  if defined(_MSC_VER) && defined(MAXSEG_64K)
+typedef png_uint_32     * * png_uint_32pp;

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(root)/programs/develop/libraries/libpng/pngconf.h – Rev 1897 → 3928