SDL_endian.h File Reference

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

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

SDL_BIG_ENDIAN

#define SDL_BIG_ENDIAN   4321

Definition at line 38 of file SDL_endian.h.

SDL_BYTEORDER

#define SDL_BYTEORDER   SDL_LIL_ENDIAN

Definition at line 53 of file SDL_endian.h.

SDL_LIL_ENDIAN

#define SDL_LIL_ENDIAN   1234

Definition at line 37 of file SDL_endian.h.

SDL_SwapBE16

#define SDL_SwapBE16

(

X

)

SDL_Swap16(X)

Definition at line 236 of file SDL_endian.h.

SDL_SwapBE32

#define SDL_SwapBE32

(

X

)

SDL_Swap32(X)

Definition at line 237 of file SDL_endian.h.

SDL_SwapBE64

#define SDL_SwapBE64

(

X

)

SDL_Swap64(X)

Definition at line 238 of file SDL_endian.h.

SDL_SwapFloatBE

#define SDL_SwapFloatBE

(

X

)

SDL_SwapFloat(X)

Definition at line 239 of file SDL_endian.h.

SDL_SwapFloatLE

#define SDL_SwapFloatLE

(

X

)

(X)

Definition at line 235 of file SDL_endian.h.

SDL_SwapLE16

#define SDL_SwapLE16

(

X

)

(X)

Definition at line 232 of file SDL_endian.h.

SDL_SwapLE32

#define SDL_SwapLE32

(

X

)

(X)

Definition at line 233 of file SDL_endian.h.

SDL_SwapLE64

#define SDL_SwapLE64

(

X

)

(X)

Definition at line 234 of file SDL_endian.h.

Function Documentation

SDL_Swap16()

SDL_FORCE_INLINE Uint16 SDL_Swap16

(

Uint16

x

)

Definition at line 107 of file SDL_endian.h.

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

SDL_Swap32()

SDL_FORCE_INLINE Uint32 SDL_Swap32

(

Uint32

x

)

Definition at line 162 of file SDL_endian.h.

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

SDL_Swap64()

SDL_FORCE_INLINE Uint64 SDL_Swap64

(

Uint64

x

)

Definition at line 196 of file SDL_endian.h.

{
    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_SwapFloat()

SDL_FORCE_INLINE float SDL_SwapFloat

(

float

x

)

Definition at line 213 of file SDL_endian.h.

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