2022-03-15 13:29:32 +01:00
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/* pngconf.h - machine-configurable file for libpng
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*
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2022-12-27 22:40:33 +01:00
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* libpng version 1.6.39
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2022-03-15 13:29:32 +01:00
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*
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2022-09-16 21:09:44 +02:00
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* Copyright (c) 2018-2022 Cosmin Truta
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2022-03-15 13:29:32 +01:00
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* Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
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* Copyright (c) 1996-1997 Andreas Dilger
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* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*
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* Any machine specific code is near the front of this file, so if you
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* are configuring libpng for a machine, you may want to read the section
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* starting here down to where it starts to typedef png_color, png_text,
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* and png_info.
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*/
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2022-12-27 22:40:33 +01:00
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#ifndef PNGCONF_H
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#define PNGCONF_H
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2022-03-15 13:29:32 +01:00
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#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
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/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
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* compiler for correct compilation. The following header files are required by
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* the standard. If your compiler doesn't provide these header files, or they
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* do not match the standard, you will need to provide/improve them.
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*/
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#include <limits.h>
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#include <stddef.h>
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/* Library header files. These header files are all defined by ISOC90; libpng
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* expects conformant implementations, however, an ISOC90 conformant system need
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* not provide these header files if the functionality cannot be implemented.
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* In this case it will be necessary to disable the relevant parts of libpng in
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* the build of pnglibconf.h.
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*
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* Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
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* include this unnecessary header file.
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*/
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#ifdef PNG_STDIO_SUPPORTED
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/* Required for the definition of FILE: */
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# include <stdio.h>
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#endif
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#ifdef PNG_SETJMP_SUPPORTED
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/* Required for the definition of jmp_buf and the declaration of longjmp: */
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# include <setjmp.h>
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#endif
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#ifdef PNG_CONVERT_tIME_SUPPORTED
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/* Required for struct tm: */
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# include <time.h>
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#endif
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#endif /* PNG_BUILDING_SYMBOL_TABLE */
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/* Prior to 1.6.0, it was possible to turn off 'const' in declarations,
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* using PNG_NO_CONST. This is no longer supported.
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*/
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#define PNG_CONST const /* backward compatibility only */
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/* This controls optimization of the reading of 16-bit and 32-bit
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* values from PNG files. It can be set on a per-app-file basis: it
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* just changes whether a macro is used when the function is called.
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* The library builder sets the default; if read functions are not
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* built into the library the macro implementation is forced on.
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*/
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#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
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# define PNG_USE_READ_MACROS
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#endif
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#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
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# if PNG_DEFAULT_READ_MACROS
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# define PNG_USE_READ_MACROS
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# endif
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#endif
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/* COMPILER SPECIFIC OPTIONS.
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*
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* These options are provided so that a variety of difficult compilers
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* can be used. Some are fixed at build time (e.g. PNG_API_RULE
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* below) but still have compiler specific implementations, others
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* may be changed on a per-file basis when compiling against libpng.
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*/
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/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
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* against legacy (pre ISOC90) compilers that did not understand function
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* prototypes. It is not required for modern C compilers.
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*/
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#ifndef PNGARG
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# define PNGARG(arglist) arglist
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#endif
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/* Function calling conventions.
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* =============================
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* Normally it is not necessary to specify to the compiler how to call
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* a function - it just does it - however on x86 systems derived from
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* Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
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* and some others) there are multiple ways to call a function and the
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* default can be changed on the compiler command line. For this reason
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* libpng specifies the calling convention of every exported function and
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* every function called via a user supplied function pointer. This is
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* done in this file by defining the following macros:
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*
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* PNGAPI Calling convention for exported functions.
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* PNGCBAPI Calling convention for user provided (callback) functions.
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* PNGCAPI Calling convention used by the ANSI-C library (required
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* for longjmp callbacks and sometimes used internally to
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* specify the calling convention for zlib).
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*
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* These macros should never be overridden. If it is necessary to
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* change calling convention in a private build this can be done
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* by setting PNG_API_RULE (which defaults to 0) to one of the values
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* below to select the correct 'API' variants.
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*
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* PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
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* This is correct in every known environment.
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* PNG_API_RULE=1 Use the operating system convention for PNGAPI and
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* the 'C' calling convention (from PNGCAPI) for
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* callbacks (PNGCBAPI). This is no longer required
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* in any known environment - if it has to be used
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* please post an explanation of the problem to the
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* libpng mailing list.
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*
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* These cases only differ if the operating system does not use the C
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* calling convention, at present this just means the above cases
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* (x86 DOS/Windows systems) and, even then, this does not apply to
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* Cygwin running on those systems.
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*
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* Note that the value must be defined in pnglibconf.h so that what
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* the application uses to call the library matches the conventions
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* set when building the library.
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*/
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/* Symbol export
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* =============
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* When building a shared library it is almost always necessary to tell
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* the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
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* is used to mark the symbols. On some systems these symbols can be
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* extracted at link time and need no special processing by the compiler,
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* on other systems the symbols are flagged by the compiler and just
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* the declaration requires a special tag applied (unfortunately) in a
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* compiler dependent way. Some systems can do either.
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*
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* A small number of older systems also require a symbol from a DLL to
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* be flagged to the program that calls it. This is a problem because
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* we do not know in the header file included by application code that
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* the symbol will come from a shared library, as opposed to a statically
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* linked one. For this reason the application must tell us by setting
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* the magic flag PNG_USE_DLL to turn on the special processing before
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* it includes png.h.
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*
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* Four additional macros are used to make this happen:
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*
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* PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
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* the build or imported if PNG_USE_DLL is set - compiler
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* and system specific.
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*
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* PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
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* 'type', compiler specific.
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*
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* PNG_DLL_EXPORT Set to the magic to use during a libpng build to
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* make a symbol exported from the DLL. Not used in the
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* public header files; see pngpriv.h for how it is used
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* in the libpng build.
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*
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* PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
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* from a DLL - used to define PNG_IMPEXP when
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* PNG_USE_DLL is set.
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*/
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/* System specific discovery.
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* ==========================
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* This code is used at build time to find PNG_IMPEXP, the API settings
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* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
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* import processing is possible. On Windows systems it also sets
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* compiler-specific macros to the values required to change the calling
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* conventions of the various functions.
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*/
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2022-09-16 21:09:44 +02:00
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#if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
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defined(__CYGWIN__)
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2022-03-15 13:29:32 +01:00
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/* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
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* MinGW on any architecture currently supported by Windows. Also includes
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* Watcom builds but these need special treatment because they are not
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* compatible with GCC or Visual C because of different calling conventions.
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*/
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# if PNG_API_RULE == 2
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/* If this line results in an error, either because __watcall is not
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* understood or because of a redefine just below you cannot use *this*
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* build of the library with the compiler you are using. *This* build was
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* build using Watcom and applications must also be built using Watcom!
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*/
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# define PNGCAPI __watcall
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# endif
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# if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
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# define PNGCAPI __cdecl
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# if PNG_API_RULE == 1
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/* If this line results in an error __stdcall is not understood and
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* PNG_API_RULE should not have been set to '1'.
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*/
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# define PNGAPI __stdcall
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# endif
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# else
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/* An older compiler, or one not detected (erroneously) above,
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* if necessary override on the command line to get the correct
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* variants for the compiler.
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*/
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# ifndef PNGCAPI
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# define PNGCAPI _cdecl
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# endif
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# if PNG_API_RULE == 1 && !defined(PNGAPI)
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# define PNGAPI _stdcall
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# endif
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# endif /* compiler/api */
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/* NOTE: PNGCBAPI always defaults to PNGCAPI. */
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# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
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# error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
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# endif
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# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
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(defined(__BORLANDC__) && __BORLANDC__ < 0x500)
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/* older Borland and MSC
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* compilers used '__export' and required this to be after
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* the type.
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*/
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# ifndef PNG_EXPORT_TYPE
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# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
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# endif
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# define PNG_DLL_EXPORT __export
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# else /* newer compiler */
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# define PNG_DLL_EXPORT __declspec(dllexport)
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# ifndef PNG_DLL_IMPORT
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# define PNG_DLL_IMPORT __declspec(dllimport)
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# endif
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# endif /* compiler */
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#else /* !Windows */
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# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
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# define PNGAPI _System
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# else /* !Windows/x86 && !OS/2 */
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/* Use the defaults, or define PNG*API on the command line (but
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* this will have to be done for every compile!)
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*/
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# endif /* other system, !OS/2 */
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#endif /* !Windows/x86 */
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/* Now do all the defaulting . */
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#ifndef PNGCAPI
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# define PNGCAPI
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#endif
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#ifndef PNGCBAPI
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# define PNGCBAPI PNGCAPI
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#endif
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#ifndef PNGAPI
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# define PNGAPI PNGCAPI
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#endif
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/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
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* then in an internal header file when building the library, otherwise (when
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* using the library) it is set here.
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*/
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#ifndef PNG_IMPEXP
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# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
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/* This forces use of a DLL, disallowing static linking */
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# define PNG_IMPEXP PNG_DLL_IMPORT
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# endif
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# ifndef PNG_IMPEXP
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# define PNG_IMPEXP
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# endif
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#endif
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/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
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* 'attributes' as a storage class - the attributes go at the start of the
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* function definition, and attributes are always appended regardless of the
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* compiler. This considerably simplifies these macros but may cause problems
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* if any compilers both need function attributes and fail to handle them as
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* a storage class (this is unlikely.)
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*/
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#ifndef PNG_FUNCTION
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# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
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#endif
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#ifndef PNG_EXPORT_TYPE
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# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
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#endif
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/* The ordinal value is only relevant when preprocessing png.h for symbol
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* table entries, so we discard it here. See the .dfn files in the
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* scripts directory.
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*/
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#ifndef PNG_EXPORTA
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# define PNG_EXPORTA(ordinal, type, name, args, attributes) \
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PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
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PNG_LINKAGE_API attributes)
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#endif
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/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
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* so make something non-empty to satisfy the requirement:
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*/
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#define PNG_EMPTY /*empty list*/
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|
|
|
|
|
|
#define PNG_EXPORT(ordinal, type, name, args) \
|
|
|
|
|
PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
|
|
|
|
|
|
|
|
|
|
/* Use PNG_REMOVED to comment out a removed interface. */
|
|
|
|
|
#ifndef PNG_REMOVED
|
|
|
|
|
# define PNG_REMOVED(ordinal, type, name, args, attributes)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifndef PNG_CALLBACK
|
|
|
|
|
# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Support for compiler specific function attributes. These are used
|
|
|
|
|
* so that where compiler support is available incorrect use of API
|
|
|
|
|
* functions in png.h will generate compiler warnings.
|
|
|
|
|
*
|
|
|
|
|
* Added at libpng-1.2.41.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef PNG_NO_PEDANTIC_WARNINGS
|
|
|
|
|
# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
|
|
|
|
|
# define PNG_PEDANTIC_WARNINGS_SUPPORTED
|
|
|
|
|
# endif
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
|
|
|
|
|
/* Support for compiler specific function attributes. These are used
|
|
|
|
|
* so that where compiler support is available, incorrect use of API
|
|
|
|
|
* functions in png.h will generate compiler warnings. Added at libpng
|
|
|
|
|
* version 1.2.41. Disabling these removes the warnings but may also produce
|
|
|
|
|
* less efficient code.
|
|
|
|
|
*/
|
|
|
|
|
# if defined(__clang__) && defined(__has_attribute)
|
|
|
|
|
/* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
|
|
|
|
|
# if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
|
|
|
|
|
# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
|
|
|
|
|
# endif
|
|
|
|
|
# if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
|
|
|
|
|
# define PNG_NORETURN __attribute__((__noreturn__))
|
|
|
|
|
# endif
|
|
|
|
|
# if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
|
|
|
|
|
# define PNG_ALLOCATED __attribute__((__malloc__))
|
|
|
|
|
# endif
|
|
|
|
|
# if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
|
|
|
|
|
# define PNG_DEPRECATED __attribute__((__deprecated__))
|
|
|
|
|
# endif
|
|
|
|
|
# if !defined(PNG_PRIVATE)
|
|
|
|
|
# ifdef __has_extension
|
|
|
|
|
# if __has_extension(attribute_unavailable_with_message)
|
|
|
|
|
# define PNG_PRIVATE __attribute__((__unavailable__(\
|
|
|
|
|
"This function is not exported by libpng.")))
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_RESTRICT
|
|
|
|
|
# define PNG_RESTRICT __restrict
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
# elif defined(__GNUC__)
|
|
|
|
|
# ifndef PNG_USE_RESULT
|
|
|
|
|
# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_NORETURN
|
|
|
|
|
# define PNG_NORETURN __attribute__((__noreturn__))
|
|
|
|
|
# endif
|
|
|
|
|
# if __GNUC__ >= 3
|
|
|
|
|
# ifndef PNG_ALLOCATED
|
|
|
|
|
# define PNG_ALLOCATED __attribute__((__malloc__))
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_DEPRECATED
|
|
|
|
|
# define PNG_DEPRECATED __attribute__((__deprecated__))
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_PRIVATE
|
|
|
|
|
# if 0 /* Doesn't work so we use deprecated instead*/
|
|
|
|
|
# define PNG_PRIVATE \
|
|
|
|
|
__attribute__((warning("This function is not exported by libpng.")))
|
|
|
|
|
# else
|
|
|
|
|
# define PNG_PRIVATE \
|
|
|
|
|
__attribute__((__deprecated__))
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
# if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
|
|
|
|
|
# ifndef PNG_RESTRICT
|
|
|
|
|
# define PNG_RESTRICT __restrict
|
|
|
|
|
# endif
|
|
|
|
|
# endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
|
|
|
|
|
# endif /* __GNUC__ >= 3 */
|
|
|
|
|
|
|
|
|
|
# elif defined(_MSC_VER) && (_MSC_VER >= 1300)
|
|
|
|
|
# ifndef PNG_USE_RESULT
|
|
|
|
|
# define PNG_USE_RESULT /* not supported */
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_NORETURN
|
|
|
|
|
# define PNG_NORETURN __declspec(noreturn)
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_ALLOCATED
|
|
|
|
|
# if (_MSC_VER >= 1400)
|
|
|
|
|
# define PNG_ALLOCATED __declspec(restrict)
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_DEPRECATED
|
|
|
|
|
# define PNG_DEPRECATED __declspec(deprecated)
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_PRIVATE
|
|
|
|
|
# define PNG_PRIVATE __declspec(deprecated)
|
|
|
|
|
# endif
|
|
|
|
|
# ifndef PNG_RESTRICT
|
|
|
|
|
# if (_MSC_VER >= 1400)
|
|
|
|
|
# define PNG_RESTRICT __restrict
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
# elif defined(__WATCOMC__)
|
|
|
|
|
# ifndef PNG_RESTRICT
|
|
|
|
|
# define PNG_RESTRICT __restrict
|
|
|
|
|
# endif
|
|
|
|
|
# endif
|
|
|
|
|
#endif /* PNG_PEDANTIC_WARNINGS */
|
|
|
|
|
|
|
|
|
|
#ifndef PNG_DEPRECATED
|
|
|
|
|
# define PNG_DEPRECATED /* Use of this function is deprecated */
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_USE_RESULT
|
|
|
|
|
# define PNG_USE_RESULT /* The result of this function must be checked */
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_NORETURN
|
|
|
|
|
# define PNG_NORETURN /* This function does not return */
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_ALLOCATED
|
|
|
|
|
# define PNG_ALLOCATED /* The result of the function is new memory */
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_PRIVATE
|
|
|
|
|
# define PNG_PRIVATE /* This is a private libpng function */
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_RESTRICT
|
|
|
|
|
# define PNG_RESTRICT /* The C99 "restrict" feature */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifndef PNG_FP_EXPORT /* A floating point API. */
|
|
|
|
|
# ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
|
|
# define PNG_FP_EXPORT(ordinal, type, name, args)\
|
|
|
|
|
PNG_EXPORT(ordinal, type, name, args);
|
|
|
|
|
# else /* No floating point APIs */
|
|
|
|
|
# define PNG_FP_EXPORT(ordinal, type, name, args)
|
|
|
|
|
# endif
|
|
|
|
|
#endif
|
|
|
|
|
#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
|
|
|
|
|
# ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
|
|
# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
|
|
|
|
|
PNG_EXPORT(ordinal, type, name, args);
|
|
|
|
|
# else /* No fixed point APIs */
|
|
|
|
|
# define PNG_FIXED_EXPORT(ordinal, type, name, args)
|
|
|
|
|
# endif
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifndef PNG_BUILDING_SYMBOL_TABLE
|
|
|
|
|
/* Some typedefs to get us started. These should be safe on most of the common
|
|
|
|
|
* platforms.
|
|
|
|
|
*
|
|
|
|
|
* png_uint_32 and png_int_32 may, currently, be larger than required to hold a
|
|
|
|
|
* 32-bit value however this is not normally advisable.
|
|
|
|
|
*
|
|
|
|
|
* png_uint_16 and png_int_16 should always be two bytes in size - this is
|
|
|
|
|
* verified at library build time.
|
|
|
|
|
*
|
|
|
|
|
* png_byte must always be one byte in size.
|
|
|
|
|
*
|
|
|
|
|
* The checks below use constants from limits.h, as defined by the ISOC90
|
|
|
|
|
* standard.
|
|
|
|
|
*/
|
|
|
|
|
#if CHAR_BIT == 8 && UCHAR_MAX == 255
|
|
|
|
|
typedef unsigned char png_byte;
|
|
|
|
|
#else
|
|
|
|
|
# error "libpng requires 8-bit bytes"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if INT_MIN == -32768 && INT_MAX == 32767
|
|
|
|
|
typedef int png_int_16;
|
|
|
|
|
#elif SHRT_MIN == -32768 && SHRT_MAX == 32767
|
|
|
|
|
typedef short png_int_16;
|
|
|
|
|
#else
|
|
|
|
|
# error "libpng requires a signed 16-bit type"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if UINT_MAX == 65535
|
|
|
|
|
typedef unsigned int png_uint_16;
|
|
|
|
|
#elif USHRT_MAX == 65535
|
|
|
|
|
typedef unsigned short png_uint_16;
|
|
|
|
|
#else
|
|
|
|
|
# error "libpng requires an unsigned 16-bit type"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if INT_MIN < -2147483646 && INT_MAX > 2147483646
|
|
|
|
|
typedef int png_int_32;
|
|
|
|
|
#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
|
|
|
|
|
typedef long int png_int_32;
|
|
|
|
|
#else
|
|
|
|
|
# error "libpng requires a signed 32-bit (or more) type"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if UINT_MAX > 4294967294U
|
|
|
|
|
typedef unsigned int png_uint_32;
|
|
|
|
|
#elif ULONG_MAX > 4294967294U
|
|
|
|
|
typedef unsigned long int png_uint_32;
|
|
|
|
|
#else
|
|
|
|
|
# error "libpng requires an unsigned 32-bit (or more) type"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Prior to 1.6.0, it was possible to disable the use of size_t and ptrdiff_t.
|
|
|
|
|
* From 1.6.0 onwards, an ISO C90 compiler, as well as a standard-compliant
|
|
|
|
|
* behavior of sizeof and ptrdiff_t are required.
|
|
|
|
|
* The legacy typedefs are provided here for backwards compatibility.
|
|
|
|
|
*/
|
|
|
|
|
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 size_t, and no smaller
|
|
|
|
|
* than png_uint_32. Casts from 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 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 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 size_t * png_size_tp;
|
|
|
|
|
typedef const 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 */
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#endif /* PNGCONF_H */
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