SDL_endian.h File Reference

#include "SDL_stdinc.h"
#include "begin_code.h"
#include "close_code.h"

Include dependency graph for SDL_endian.h:

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Go to the source code of this file.

Macros
#define	SDL_BYTEORDER   SDL_LIL_ENDIAN
The two types of endianness
#define	SDL_LIL_ENDIAN   1234
#define	SDL_BIG_ENDIAN   4321
Swap to native
Byteswap item from the specified endianness to the native endianness.
#define	SDL_SwapLE16(X)   (X)
#define	SDL_SwapLE32(X)   (X)
#define	SDL_SwapLE64(X)   (X)
#define	SDL_SwapFloatLE(X)   (X)
#define	SDL_SwapBE16(X)   SDL_Swap16(X)
#define	SDL_SwapBE32(X)   SDL_Swap32(X)
#define	SDL_SwapBE64(X)   SDL_Swap64(X)
#define	SDL_SwapFloatBE(X)   SDL_SwapFloat(X)

Functions
SDL_FORCE_INLINE Uint16	SDL_Swap16 (Uint16 x)
SDL_FORCE_INLINE Uint32	SDL_Swap32 (Uint32 x)
SDL_FORCE_INLINE Uint64	SDL_Swap64 (Uint64 x)
SDL_FORCE_INLINE float	SDL_SwapFloat (float x)

Detailed Description

Functions for reading and writing endian-specific values

Definition in file SDL_endian.h.

Macro Definition Documentation

#define SDL_BIG_ENDIAN   4321

Definition at line 38 of file SDL_endian.h.

Referenced by platform_testEndianessAndSwap(), SDLTest_ImageBlit(), SDLTest_ImageBlitAlpha(), SDLTest_ImageBlitBlend(), SDLTest_ImageBlitBlendAdd(), SDLTest_ImageBlitBlendAll(), SDLTest_ImageBlitBlendMod(), SDLTest_ImageBlitBlendNone(), SDLTest_ImageBlitColor(), SDLTest_ImageFace(), SDLTest_ImagePrimitives(), SDLTest_ImagePrimitivesBlend(), and TestEndian().

#define SDL_BYTEORDER   SDL_LIL_ENDIAN

Definition at line 53 of file SDL_endian.h.

#define SDL_LIL_ENDIAN   1234

Definition at line 37 of file SDL_endian.h.

Referenced by platform_testEndianessAndSwap(), SDL_BuildAudioTypeCVTFromFloat(), SDL_BuildAudioTypeCVTToFloat(), SDL_SaveBMP_RW(), SDLTest_ScreenShot(), and TestEndian().

#define SDL_SwapBE16

(

X

)

SDL_Swap16(X)

Definition at line 236 of file SDL_endian.h.

Referenced by SDL_ReadBE16(), and SDL_WriteBE16().

#define SDL_SwapBE32

(

X

)

SDL_Swap32(X)

Definition at line 237 of file SDL_endian.h.

Referenced by SDL_MixAudioFormat(), SDL_ReadBE32(), and SDL_WriteBE32().

#define SDL_SwapBE64

(

X

)

SDL_Swap64(X)

Definition at line 238 of file SDL_endian.h.

Referenced by SDL_ReadBE64(), and SDL_WriteBE64().

#define SDL_SwapFloatBE

(

X

)

SDL_SwapFloat(X)

Definition at line 239 of file SDL_endian.h.

Referenced by SDL_MixAudioFormat().

#define SDL_SwapFloatLE

(

X

)

(X)

Definition at line 235 of file SDL_endian.h.

Referenced by SaveTemplate(), SDL_LoadDollarTemplates(), and SDL_MixAudioFormat().

#define SDL_SwapLE16

(

X

)

(X)

Definition at line 232 of file SDL_endian.h.

Referenced by InitIMA_ADPCM(), InitMS_ADPCM(), IOS_AddMFIJoystickDevice(), SDL_LoadWAV_RW(), SDL_ReadLE16(), and SDL_WriteLE16().

#define SDL_SwapLE32

(

X

)

(X)

Definition at line 233 of file SDL_endian.h.

Referenced by InitIMA_ADPCM(), InitMS_ADPCM(), SDL_LoadWAV_RW(), SDL_MixAudioFormat(), SDL_ReadLE32(), and SDL_WriteLE32().

#define SDL_SwapLE64

(

X

)

(X)

Definition at line 234 of file SDL_endian.h.

Referenced by SDL_ReadLE64(), and SDL_WriteLE64().

Function Documentation

SDL_FORCE_INLINE Uint16 SDL_Swap16

(

Uint16

x

)

Definition at line 107 of file SDL_endian.h.

References SDL_static_cast.

Referenced by platform_testEndianessAndSwap(), SDL_ConvertPixels_SwapNV(), SDL_LoadBMP_RW(), and TestEndian().

{
    return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
}

SDL_FORCE_INLINE Uint32 SDL_Swap32

(

Uint32

x

)

Definition at line 162 of file SDL_endian.h.

References SDL_static_cast.

Referenced by platform_testEndianessAndSwap(), SDL_LoadBMP_RW(), SDL_Swap64(), SDL_SwapFloat(), and TestEndian().

{
    return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
                                    ((x >> 8) & 0x0000FF00) | (x >> 24)));
}

SDL_FORCE_INLINE Uint64 SDL_Swap64

(

Uint64

x

)

Definition at line 196 of file SDL_endian.h.

References SDL_static_cast, and SDL_Swap32().

Referenced by platform_testEndianessAndSwap(), and TestEndian().

{
    Uint32 hi, lo;

    /* Separate into high and low 32-bit values and swap them */
    lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
    x >>= 32;
    hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
    x = SDL_Swap32(lo);
    x <<= 32;
    x |= SDL_Swap32(hi);
    return (x);
}

SDL_FORCE_INLINE float SDL_SwapFloat

(

float

x

)

Definition at line 213 of file SDL_endian.h.

References SDL_Swap32().

{
    union
    {
        float f;
        Uint32 ui32;
    } swapper;
    swapper.f = x;
    swapper.ui32 = SDL_Swap32(swapper.ui32);
    return swapper.f;
}