include/SDL_version.h
author Ryan C. Gordon <icculus@icculus.org>
Mon, 11 Jan 2010 07:33:56 +0000
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/**
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 *  \file SDL_version.h
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 *  
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 *  This header defines the current SDL version.
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 */
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#ifndef _SDL_version_h
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#define _SDL_version_h
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#include "SDL_stdinc.h"
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#include "SDL_revision.h"
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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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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/**
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 *  \brief Information the version of SDL in use.
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 *  
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 *  Represents the library's version as three levels: major revision
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 *  (increments with massive changes, additions, and enhancements),
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 *  minor revision (increments with backwards-compatible changes to the
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 *  major revision), and patchlevel (increments with fixes to the minor
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 *  revision).
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 *  
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 *  \sa SDL_VERSION
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 *  \sa SDL_GetVersion
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 */
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typedef struct SDL_version
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{
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    Uint8 major;        /**< major version */
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    Uint8 minor;        /**< minor version */
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    Uint8 patch;        /**< update version */
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} SDL_version;
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/* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL
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*/
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#define SDL_MAJOR_VERSION	1
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#define SDL_MINOR_VERSION	3
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#define SDL_PATCHLEVEL		0
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/**
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 *  \brief Macro to determine SDL version program was compiled against.
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 *  
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 *  This macro fills in a SDL_version structure with the version of the
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 *  library you compiled against. This is determined by what header the
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 *  compiler uses. Note that if you dynamically linked the library, you might
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 *  have a slightly newer or older version at runtime. That version can be
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 *  determined with SDL_GetVersion(), which, unlike SDL_VERSION(),
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 *  is not a macro.
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 *  
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 *  \param x A pointer to a SDL_version struct to initialize.
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 *  
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 *  \sa SDL_version
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 *  \sa SDL_GetVersion
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 */
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#define SDL_VERSION(x)							\
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{									\
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	(x)->major = SDL_MAJOR_VERSION;					\
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	(x)->minor = SDL_MINOR_VERSION;					\
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	(x)->patch = SDL_PATCHLEVEL;					\
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}
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/**
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 *  This macro turns the version numbers into a numeric value:
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 *  \verbatim
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    (1,2,3) -> (1203)
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    \endverbatim
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 *  
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 *  This assumes that there will never be more than 100 patchlevels.
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 */
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#define SDL_VERSIONNUM(X, Y, Z)						\
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	((X)*1000 + (Y)*100 + (Z))
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/**
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 *  This is the version number macro for the current SDL version.
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 */
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#define SDL_COMPILEDVERSION \
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	SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL)
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/**
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 *  This macro will evaluate to true if compiled with SDL at least X.Y.Z.
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 */
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#define SDL_VERSION_ATLEAST(X, Y, Z) \
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	(SDL_COMPILEDVERSION >= SDL_VERSIONNUM(X, Y, Z))
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/**
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 *  \brief Get the version of SDL that is linked against your program.
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 *  
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 *  If you are using a shared library (DLL) version of SDL, then it is
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 *  possible that it will be different than the version you compiled against.
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 *
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 *  This is a real function; the macro SDL_VERSION() tells you what version
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 *  of SDL you compiled against:
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 *  
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 *  \code
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 *  SDL_version compiled;
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 *  SDL_version linked;
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 *  
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 *  SDL_VERSION(&compiled);
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 *  SDL_GetVersion(&linked);
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 *  printf("We compiled against SDL version %d.%d.%d ...\n",
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 *         compiled.major, compiled.minor, compiled.patch);
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 *  printf("But we linked against SDL version %d.%d.%d.\n",
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 *         linked.major, linked.minor, linked.patch);
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 *  \endcode
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 *  
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 *  This function may be called safely at any time, even before SDL_Init().
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 *  
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 *  \sa SDL_VERSION
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 */
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extern DECLSPEC void SDLCALL SDL_GetVersion(SDL_version * ver);
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/**
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 *  \brief Get the code revision of SDL that is linked against your program.
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 */
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extern DECLSPEC int SDLCALL SDL_GetRevision(void);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
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#include "close_code.h"
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#endif /* _SDL_version_h */
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/* vi: set ts=4 sw=4 expandtab: */