include/SDL_stdinc.h
author Ryan C. Gordon <icculus@icculus.org>
Mon, 08 Sep 2014 01:36:22 -0400
changeset 9126 08f3b56969b1
parent 9080 2e4e71ec140f
child 9260 039714172dc3
permissions -rw-r--r--
Deal with various .bmp file format variants in SDL_LoadBMP_RW().

This helps when modern versions of The Gimp (and lots of other things)
produces a 32-bit bitmap with an alpha channel, or anything with "BI_BITFIELDS"
format, since that data is now embedded in the bitmap info header instead of
directly following it and we would accidentally skip over embedded versions of
it.

Fixes Bugzilla #2714.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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 *  \file SDL_stdinc.h
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 *
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 *  This is a general header that includes C language support.
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 */
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#ifndef _SDL_stdinc_h
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#define _SDL_stdinc_h
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#include "SDL_config.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#if defined(STDC_HEADERS)
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# include <stdlib.h>
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# include <stddef.h>
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# include <stdarg.h>
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#else
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# if defined(HAVE_STDLIB_H)
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#  include <stdlib.h>
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# elif defined(HAVE_MALLOC_H)
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#  include <malloc.h>
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# endif
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# if defined(HAVE_STDDEF_H)
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#  include <stddef.h>
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# endif
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# if defined(HAVE_STDARG_H)
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#  include <stdarg.h>
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# endif
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#endif
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#ifdef HAVE_STRING_H
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# if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
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#  include <memory.h>
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# endif
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#if defined(HAVE_INTTYPES_H)
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# include <inttypes.h>
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#elif defined(HAVE_STDINT_H)
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# include <stdint.h>
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#endif
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#ifdef HAVE_CTYPE_H
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# include <ctype.h>
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#endif
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#ifdef HAVE_MATH_H
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# if defined(__WINRT__)
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/* Defining _USE_MATH_DEFINES is required to get M_PI to be defined on
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   WinRT.  See http://msdn.microsoft.com/en-us/library/4hwaceh6.aspx
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   for more information.
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*/
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#  define _USE_MATH_DEFINES
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# endif
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# include <math.h>
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#endif
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#ifdef HAVE_FLOAT_H
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# include <float.h>
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#endif
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#if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
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# include <iconv.h>
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#endif
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/**
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 *  The number of elements in an array.
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 */
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#define SDL_arraysize(array)    (sizeof(array)/sizeof(array[0]))
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#define SDL_TABLESIZE(table)    SDL_arraysize(table)
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/**
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 *  \name Cast operators
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 *
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 *  Use proper C++ casts when compiled as C++ to be compatible with the option
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 *  -Wold-style-cast of GCC (and -Werror=old-style-cast in GCC 4.2 and above).
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 */
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/* @{ */
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#ifdef __cplusplus
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#define SDL_reinterpret_cast(type, expression) reinterpret_cast<type>(expression)
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#define SDL_static_cast(type, expression) static_cast<type>(expression)
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#define SDL_const_cast(type, expression) const_cast<type>(expression)
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#else
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#define SDL_reinterpret_cast(type, expression) ((type)(expression))
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#define SDL_static_cast(type, expression) ((type)(expression))
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#define SDL_const_cast(type, expression) ((type)(expression))
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#endif
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/* @} *//* Cast operators */
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/* Define a four character code as a Uint32 */
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#define SDL_FOURCC(A, B, C, D) \
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    ((SDL_static_cast(Uint32, SDL_static_cast(Uint8, (A))) << 0) | \
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     (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (B))) << 8) | \
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     (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (C))) << 16) | \
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     (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (D))) << 24))
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/**
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 *  \name Basic data types
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 */
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/* @{ */
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typedef enum
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{
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    SDL_FALSE = 0,
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    SDL_TRUE = 1
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} SDL_bool;
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/**
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 * \brief A signed 8-bit integer type.
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 */
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typedef int8_t Sint8;
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/**
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 * \brief An unsigned 8-bit integer type.
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 */
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typedef uint8_t Uint8;
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/**
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 * \brief A signed 16-bit integer type.
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 */
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typedef int16_t Sint16;
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/**
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 * \brief An unsigned 16-bit integer type.
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 */
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typedef uint16_t Uint16;
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/**
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 * \brief A signed 32-bit integer type.
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 */
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typedef int32_t Sint32;
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/**
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 * \brief An unsigned 32-bit integer type.
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 */
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typedef uint32_t Uint32;
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/**
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 * \brief A signed 64-bit integer type.
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 */
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typedef int64_t Sint64;
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/**
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 * \brief An unsigned 64-bit integer type.
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 */
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typedef uint64_t Uint64;
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/* @} *//* Basic data types */
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/* Make sure we have macros for printing 64 bit values.
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 * <stdint.h> should define these but this is not true all platforms.
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 * (for example win32) */
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#ifndef SDL_PRIs64
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#ifdef PRIs64
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#define SDL_PRIs64 PRIs64
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#elif defined(__WIN32__)
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#define SDL_PRIs64 "I64"
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#else
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#define SDL_PRIs64 "lld"
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#endif
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#endif
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#ifndef SDL_PRIu64
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#ifdef PRIu64
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#define SDL_PRIu64 PRIu64
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#elif defined(__WIN32__)
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#define SDL_PRIu64 "I64u"
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#else
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#define SDL_PRIu64 "llu"
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#endif
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#endif
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/* Annotations to help code analysis tools */
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#ifdef SDL_DISABLE_ANALYZE_MACROS
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#define SDL_IN_BYTECAP(x)
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#define SDL_INOUT_Z_CAP(x)
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#define SDL_OUT_Z_CAP(x)
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#define SDL_OUT_CAP(x)
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#define SDL_OUT_BYTECAP(x)
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#define SDL_OUT_Z_BYTECAP(x)
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#define SDL_PRINTF_FORMAT_STRING
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#define SDL_SCANF_FORMAT_STRING
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#define SDL_PRINTF_VARARG_FUNC( fmtargnumber )
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#define SDL_SCANF_VARARG_FUNC( fmtargnumber )
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#else
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#if _MSC_VER >= 1600 /* VS 2010 and above */
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#include <sal.h>
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#define SDL_IN_BYTECAP(x) _In_bytecount_(x)
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#define SDL_INOUT_Z_CAP(x) _Inout_z_cap_(x)
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#define SDL_OUT_Z_CAP(x) _Out_z_cap_(x)
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#define SDL_OUT_CAP(x) _Out_cap_(x)
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#define SDL_OUT_BYTECAP(x) _Out_bytecap_(x)
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#define SDL_OUT_Z_BYTECAP(x) _Out_z_bytecap_(x)
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#define SDL_PRINTF_FORMAT_STRING _Printf_format_string_
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#define SDL_SCANF_FORMAT_STRING _Scanf_format_string_impl_
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#else
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#define SDL_IN_BYTECAP(x)
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#define SDL_INOUT_Z_CAP(x)
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#define SDL_OUT_Z_CAP(x)
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#define SDL_OUT_CAP(x)
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#define SDL_OUT_BYTECAP(x)
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#define SDL_OUT_Z_BYTECAP(x)
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#define SDL_PRINTF_FORMAT_STRING
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#define SDL_SCANF_FORMAT_STRING
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#endif
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#if defined(__GNUC__)
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#define SDL_PRINTF_VARARG_FUNC( fmtargnumber ) __attribute__ (( format( __printf__, fmtargnumber, fmtargnumber+1 )))
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#define SDL_SCANF_VARARG_FUNC( fmtargnumber ) __attribute__ (( format( __scanf__, fmtargnumber, fmtargnumber+1 )))
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#else
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#define SDL_PRINTF_VARARG_FUNC( fmtargnumber )
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#define SDL_SCANF_VARARG_FUNC( fmtargnumber )
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#endif
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#endif /* SDL_DISABLE_ANALYZE_MACROS */
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#define SDL_COMPILE_TIME_ASSERT(name, x)               \
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       typedef int SDL_dummy_ ## name[(x) * 2 - 1]
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/** \cond */
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#ifndef DOXYGEN_SHOULD_IGNORE_THIS
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SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
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SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
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SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
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SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
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SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
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SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
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SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
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SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
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#endif /* DOXYGEN_SHOULD_IGNORE_THIS */
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/** \endcond */
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/* Check to make sure enums are the size of ints, for structure packing.
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   For both Watcom C/C++ and Borland C/C++ the compiler option that makes
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   enums having the size of an int must be enabled.
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   This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
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*/
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/** \cond */
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#ifndef DOXYGEN_SHOULD_IGNORE_THIS
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#if !defined(__ANDROID__)
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   /* TODO: include/SDL_stdinc.h:174: error: size of array 'SDL_dummy_enum' is negative */
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typedef enum
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{
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    DUMMY_ENUM_VALUE
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} SDL_DUMMY_ENUM;
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SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
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#endif
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#endif /* DOXYGEN_SHOULD_IGNORE_THIS */
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/** \endcond */
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(HAVE_ALLOCA) && !defined(alloca)
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# if defined(HAVE_ALLOCA_H)
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#  include <alloca.h>
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# elif defined(__GNUC__)
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#  define alloca __builtin_alloca
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# elif defined(_MSC_VER)
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#  include <malloc.h>
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#  define alloca _alloca
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# elif defined(__WATCOMC__)
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#  include <malloc.h>
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# elif defined(__BORLANDC__)
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#  include <malloc.h>
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# elif defined(__DMC__)
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#  include <stdlib.h>
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# elif defined(__AIX__)
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#pragma alloca
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# elif defined(__MRC__)
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void *alloca(unsigned);
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# else
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char *alloca();
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# endif
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#endif
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#ifdef HAVE_ALLOCA
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#define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
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#define SDL_stack_free(data)
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#else
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#define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
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#define SDL_stack_free(data)            SDL_free(data)
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#endif
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extern DECLSPEC void *SDLCALL SDL_malloc(size_t size);
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extern DECLSPEC void *SDLCALL SDL_calloc(size_t nmemb, size_t size);
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extern DECLSPEC void *SDLCALL SDL_realloc(void *mem, size_t size);
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extern DECLSPEC void SDLCALL SDL_free(void *mem);
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extern DECLSPEC char *SDLCALL SDL_getenv(const char *name);
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extern DECLSPEC int SDLCALL SDL_setenv(const char *name, const char *value, int overwrite);
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extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size, int (*compare) (const void *, const void *));
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extern DECLSPEC int SDLCALL SDL_abs(int x);
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/* !!! FIXME: these have side effects. You probably shouldn't use them. */
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/* !!! FIXME: Maybe we do forceinline functions of SDL_mini, SDL_minf, etc? */
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#define SDL_min(x, y) (((x) < (y)) ? (x) : (y))
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#define SDL_max(x, y) (((x) > (y)) ? (x) : (y))
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extern DECLSPEC int SDLCALL SDL_isdigit(int x);
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extern DECLSPEC int SDLCALL SDL_isspace(int x);
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extern DECLSPEC int SDLCALL SDL_toupper(int x);
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extern DECLSPEC int SDLCALL SDL_tolower(int x);
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extern DECLSPEC void *SDLCALL SDL_memset(SDL_OUT_BYTECAP(len) void *dst, int c, size_t len);
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#define SDL_zero(x) SDL_memset(&(x), 0, sizeof((x)))
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#define SDL_zerop(x) SDL_memset((x), 0, sizeof(*(x)))
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/* Note that memset() is a byte assignment and this is a 32-bit assignment, so they're not directly equivalent. */
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SDL_FORCE_INLINE void SDL_memset4(void *dst, Uint32 val, size_t dwords)
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{
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#if defined(__GNUC__) && defined(i386)
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    int u0, u1, u2;
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    __asm__ __volatile__ (
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        "cld \n\t"
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        "rep ; stosl \n\t"
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        : "=&D" (u0), "=&a" (u1), "=&c" (u2)
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        : "0" (dst), "1" (val), "2" (SDL_static_cast(Uint32, dwords))
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        : "memory"
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    );
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#else
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    size_t _n = (dwords + 3) / 4;
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    Uint32 *_p = SDL_static_cast(Uint32 *, dst);
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    Uint32 _val = (val);
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    if (dwords == 0)
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        return;
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   350
    switch (dwords % 4)
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    {
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        case 0: do {    *_p++ = _val;
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   353
        case 3:         *_p++ = _val;
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        case 2:         *_p++ = _val;
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   355
        case 1:         *_p++ = _val;
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   356
        } while ( --_n );
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   357
    }
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#endif
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   359
}
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   360
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   361
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extern DECLSPEC void *SDLCALL SDL_memcpy(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src, size_t len);
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   363
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SDL_FORCE_INLINE void *SDL_memcpy4(SDL_OUT_BYTECAP(dwords*4) void *dst, SDL_IN_BYTECAP(dwords*4) const void *src, size_t dwords)
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   365
{
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    return SDL_memcpy(dst, src, dwords * 4);
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   367
}
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extern DECLSPEC void *SDLCALL SDL_memmove(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src, size_t len);
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extern DECLSPEC int SDLCALL SDL_memcmp(const void *s1, const void *s2, size_t len);
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   371
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   372
extern DECLSPEC size_t SDLCALL SDL_wcslen(const wchar_t *wstr);
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extern DECLSPEC size_t SDLCALL SDL_wcslcpy(SDL_OUT_Z_CAP(maxlen) wchar_t *dst, const wchar_t *src, size_t maxlen);
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   374
extern DECLSPEC size_t SDLCALL SDL_wcslcat(SDL_INOUT_Z_CAP(maxlen) wchar_t *dst, const wchar_t *src, size_t maxlen);
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   375
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   376
extern DECLSPEC size_t SDLCALL SDL_strlen(const char *str);
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   377
extern DECLSPEC size_t SDLCALL SDL_strlcpy(SDL_OUT_Z_CAP(maxlen) char *dst, const char *src, size_t maxlen);
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   378
extern DECLSPEC size_t SDLCALL SDL_utf8strlcpy(SDL_OUT_Z_CAP(dst_bytes) char *dst, const char *src, size_t dst_bytes);
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   379
extern DECLSPEC size_t SDLCALL SDL_strlcat(SDL_INOUT_Z_CAP(maxlen) char *dst, const char *src, size_t maxlen);
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extern DECLSPEC char *SDLCALL SDL_strdup(const char *str);
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extern DECLSPEC char *SDLCALL SDL_strrev(char *str);
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   382
extern DECLSPEC char *SDLCALL SDL_strupr(char *str);
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   383
extern DECLSPEC char *SDLCALL SDL_strlwr(char *str);
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   384
extern DECLSPEC char *SDLCALL SDL_strchr(const char *str, int c);
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   385
extern DECLSPEC char *SDLCALL SDL_strrchr(const char *str, int c);
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   386
extern DECLSPEC char *SDLCALL SDL_strstr(const char *haystack, const char *needle);
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   387
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   388
extern DECLSPEC char *SDLCALL SDL_itoa(int value, char *str, int radix);
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   389
extern DECLSPEC char *SDLCALL SDL_uitoa(unsigned int value, char *str, int radix);
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   390
extern DECLSPEC char *SDLCALL SDL_ltoa(long value, char *str, int radix);
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   391
extern DECLSPEC char *SDLCALL SDL_ultoa(unsigned long value, char *str, int radix);
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   392
extern DECLSPEC char *SDLCALL SDL_lltoa(Sint64 value, char *str, int radix);
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   393
extern DECLSPEC char *SDLCALL SDL_ulltoa(Uint64 value, char *str, int radix);
slouken@4761
   394
icculus@7003
   395
extern DECLSPEC int SDLCALL SDL_atoi(const char *str);
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   396
extern DECLSPEC double SDLCALL SDL_atof(const char *str);
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   397
extern DECLSPEC long SDLCALL SDL_strtol(const char *str, char **endp, int base);
slouken@7351
   398
extern DECLSPEC unsigned long SDLCALL SDL_strtoul(const char *str, char **endp, int base);
slouken@7351
   399
extern DECLSPEC Sint64 SDLCALL SDL_strtoll(const char *str, char **endp, int base);
slouken@7351
   400
extern DECLSPEC Uint64 SDLCALL SDL_strtoull(const char *str, char **endp, int base);
slouken@7351
   401
extern DECLSPEC double SDLCALL SDL_strtod(const char *str, char **endp);
icculus@7003
   402
icculus@7003
   403
extern DECLSPEC int SDLCALL SDL_strcmp(const char *str1, const char *str2);
slouken@7351
   404
extern DECLSPEC int SDLCALL SDL_strncmp(const char *str1, const char *str2, size_t maxlen);
slouken@7351
   405
extern DECLSPEC int SDLCALL SDL_strcasecmp(const char *str1, const char *str2);
slouken@7351
   406
extern DECLSPEC int SDLCALL SDL_strncasecmp(const char *str1, const char *str2, size_t len);
slouken@4761
   407
slouken@8820
   408
extern DECLSPEC int SDLCALL SDL_sscanf(const char *text, SDL_SCANF_FORMAT_STRING const char *fmt, ...) SDL_SCANF_VARARG_FUNC(2);
icculus@8089
   409
extern DECLSPEC int SDLCALL SDL_vsscanf(const char *text, const char *fmt, va_list ap);
slouken@8820
   410
extern DECLSPEC int SDLCALL SDL_snprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, SDL_PRINTF_FORMAT_STRING const char *fmt, ... ) SDL_PRINTF_VARARG_FUNC(3);
slouken@8820
   411
extern DECLSPEC int SDLCALL SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, const char *fmt, va_list ap);
slouken@4761
   412
slouken@4761
   413
#ifndef HAVE_M_PI
slouken@6627
   414
#ifndef M_PI
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   415
#define M_PI    3.14159265358979323846264338327950288   /* pi */
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   416
#endif
slouken@6627
   417
#endif
slouken@4761
   418
slouken@8004
   419
extern DECLSPEC double SDLCALL SDL_acos(double x);
slouken@8004
   420
extern DECLSPEC double SDLCALL SDL_asin(double x);
icculus@7003
   421
extern DECLSPEC double SDLCALL SDL_atan(double x);
icculus@7003
   422
extern DECLSPEC double SDLCALL SDL_atan2(double x, double y);
icculus@7003
   423
extern DECLSPEC double SDLCALL SDL_ceil(double x);
icculus@7003
   424
extern DECLSPEC double SDLCALL SDL_copysign(double x, double y);
icculus@7003
   425
extern DECLSPEC double SDLCALL SDL_cos(double x);
icculus@7003
   426
extern DECLSPEC float SDLCALL SDL_cosf(float x);
icculus@7003
   427
extern DECLSPEC double SDLCALL SDL_fabs(double x);
icculus@7003
   428
extern DECLSPEC double SDLCALL SDL_floor(double x);
icculus@7003
   429
extern DECLSPEC double SDLCALL SDL_log(double x);
icculus@7003
   430
extern DECLSPEC double SDLCALL SDL_pow(double x, double y);
icculus@7003
   431
extern DECLSPEC double SDLCALL SDL_scalbn(double x, int n);
icculus@7003
   432
extern DECLSPEC double SDLCALL SDL_sin(double x);
icculus@7003
   433
extern DECLSPEC float SDLCALL SDL_sinf(float x);
icculus@7003
   434
extern DECLSPEC double SDLCALL SDL_sqrt(double x);
slouken@8840
   435
extern DECLSPEC float SDLCALL SDL_sqrtf(float x);
slouken@8840
   436
extern DECLSPEC double SDLCALL SDL_tan(double x);
slouken@8840
   437
extern DECLSPEC float SDLCALL SDL_tanf(float x);
slouken@4761
   438
slouken@4761
   439
/* The SDL implementation of iconv() returns these error codes */
slouken@7191
   440
#define SDL_ICONV_ERROR     (size_t)-1
slouken@7191
   441
#define SDL_ICONV_E2BIG     (size_t)-2
slouken@7191
   442
#define SDL_ICONV_EILSEQ    (size_t)-3
slouken@7191
   443
#define SDL_ICONV_EINVAL    (size_t)-4
slouken@4761
   444
icculus@7003
   445
/* SDL_iconv_* are now always real symbols/types, not macros or inlined. */
slouken@4761
   446
typedef struct _SDL_iconv_t *SDL_iconv_t;
slouken@4761
   447
extern DECLSPEC SDL_iconv_t SDLCALL SDL_iconv_open(const char *tocode,
slouken@4761
   448
                                                   const char *fromcode);
slouken@4761
   449
extern DECLSPEC int SDLCALL SDL_iconv_close(SDL_iconv_t cd);
slouken@4761
   450
extern DECLSPEC size_t SDLCALL SDL_iconv(SDL_iconv_t cd, const char **inbuf,
slouken@4761
   451
                                         size_t * inbytesleft, char **outbuf,
slouken@4761
   452
                                         size_t * outbytesleft);
slouken@4761
   453
/**
slouken@4761
   454
 *  This function converts a string between encodings in one pass, returning a
slouken@4761
   455
 *  string that must be freed with SDL_free() or NULL on error.
slouken@4761
   456
 */
slouken@4761
   457
extern DECLSPEC char *SDLCALL SDL_iconv_string(const char *tocode,
slouken@4761
   458
                                               const char *fromcode,
slouken@4761
   459
                                               const char *inbuf,
slouken@4761
   460
                                               size_t inbytesleft);
slouken@7191
   461
#define SDL_iconv_utf8_locale(S)    SDL_iconv_string("", "UTF-8", S, SDL_strlen(S)+1)
slouken@7191
   462
#define SDL_iconv_utf8_ucs2(S)      (Uint16 *)SDL_iconv_string("UCS-2-INTERNAL", "UTF-8", S, SDL_strlen(S)+1)
slouken@7191
   463
#define SDL_iconv_utf8_ucs4(S)      (Uint32 *)SDL_iconv_string("UCS-4-INTERNAL", "UTF-8", S, SDL_strlen(S)+1)
slouken@4761
   464
slouken@4761
   465
/* Ends C function definitions when using C++ */
slouken@4761
   466
#ifdef __cplusplus
slouken@4761
   467
}
slouken@4761
   468
#endif
slouken@4761
   469
#include "close_code.h"
slouken@4761
   470
slouken@4761
   471
#endif /* _SDL_stdinc_h */
slouken@4761
   472
slouken@4761
   473
/* vi: set ts=4 sw=4 expandtab: */