//! \file Platform.hpp
//! Macros and utility functions to facilitate programming on all of Gosu's supported platforms.

#ifndef GOSU_PLATFORM_HPP
#define GOSU_PLATFORM_HPP

#ifdef __BIG_ENDIAN__
# define GOSU_IS_BIG_ENDIAN
# define IDENTITY_FUN bigToNative
# define IDENTITY_FUN2 nativeToBig
# define CONV_FUN littleToNative
# define CONV_FUN2 nativeToLittle
#else
# define GOSU_IS_LITTLE_ENDIAN
# define IDENTITY_FUN littleToNative
# define IDENTITY_FUN2 nativeToLittle
# define CONV_FUN bigToNative
# define CONV_FUN2 nativeToBig
#endif

#include <algorithm>

namespace Gosu
{
    template<typename T> T IDENTITY_FUN(T t) { return t; }
    template<typename T> T IDENTITY_FUN2(T t) { return t; }
    
    template<typename T>
    T CONV_FUN(T t)
    {
        char* begin = reinterpret_cast<char*>(&t);
        std::reverse(begin, begin + sizeof t);
        return t;
    }

    template<typename T> T CONV_FUN2(T t) { return CONV_FUN(t); }
}

#undef IDENTITY_FUN
#undef IDENTITY_FUN2
#undef CONV_FUN
#undef CONV_FUN2

#if defined(_MSC_VER)
# define GOSU_NORETURN __declspec(noreturn)
#elif defined(__GNUC__)
# define GOSU_NORETURN __attribute__ ((noreturn))
#endif

#if defined(WIN32)
# define GOSU_IS_WIN
#else
# define GOSU_IS_UNIX
# if defined(__linux) || defined(__FreeBSD__)
#  define GOSU_IS_X
# else
#  define GOSU_IS_MAC
#  include <TargetConditionals.h>
#  if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
#   define GOSU_IS_IPHONE
#  endif
# endif
#endif

#if defined (GOSU_IS_IPHONE) || defined(__arm__)
# define GOSU_IS_OPENGLES
#endif

#ifndef SWIG
# if _MSC_VER >= 1700 || ((__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__GXX_EXPERIMENTAL_CXX0X__))
#  define GOSU_CPP11_ENABLED
# endif
#endif

#ifdef GOSU_CPP11_ENABLED
# define GOSU_UNIQUE_PTR std::unique_ptr
# define GOSU_MOVE_UNIQUE_PTR(ptr) std::move(ptr)
#else
# define GOSU_UNIQUE_PTR std::auto_ptr
# define GOSU_MOVE_UNIQUE_PTR(ptr) (ptr)
#endif

#ifndef GOSU_DEPRECATED
# if defined(GOSU_IS_WIN)
#  define GOSU_DEPRECATED __declspec(deprecated)
# elif (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
#  define GOSU_DEPRECATED  __attribute__((__deprecated__))
# else
#  define GOSU_DEPRECATED
# endif
#endif

#endif