SDL  2.0
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

◆ 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 56 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 239 of file SDL_endian.h.

◆ SDL_SwapBE32

#define SDL_SwapBE32 (   X)    SDL_Swap32(X)

Definition at line 240 of file SDL_endian.h.

◆ SDL_SwapBE64

#define SDL_SwapBE64 (   X)    SDL_Swap64(X)

Definition at line 241 of file SDL_endian.h.

◆ SDL_SwapFloatBE

#define SDL_SwapFloatBE (   X)    SDL_SwapFloat(X)

Definition at line 242 of file SDL_endian.h.

◆ SDL_SwapFloatLE

#define SDL_SwapFloatLE (   X)    (X)

Definition at line 238 of file SDL_endian.h.

◆ SDL_SwapLE16

#define SDL_SwapLE16 (   X)    (X)

Definition at line 235 of file SDL_endian.h.

◆ SDL_SwapLE32

#define SDL_SwapLE32 (   X)    (X)

Definition at line 236 of file SDL_endian.h.

◆ SDL_SwapLE64

#define SDL_SwapLE64 (   X)    (X)

Definition at line 237 of file SDL_endian.h.

Function Documentation

◆ SDL_Swap16()

SDL_FORCE_INLINE Uint16 SDL_Swap16 ( Uint16  x)

Definition at line 110 of file SDL_endian.h.

References SDL_FORCE_INLINE, SDL_static_cast, and SDL_Swap32().

111 {
112  return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
113 }
uint16_t Uint16
Definition: SDL_stdinc.h:197
#define SDL_static_cast(type, expression)
Definition: SDL_stdinc.h:144

◆ SDL_Swap32()

SDL_FORCE_INLINE Uint32 SDL_Swap32 ( Uint32  x)

Definition at line 165 of file SDL_endian.h.

References SDL_FORCE_INLINE, SDL_static_cast, and SDL_Swap64().

Referenced by SDL_Swap16(), SDL_Swap64(), and SDL_SwapFloat().

166 {
167  return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
168  ((x >> 8) & 0x0000FF00) | (x >> 24)));
169 }
uint32_t Uint32
Definition: SDL_stdinc.h:209
#define SDL_static_cast(type, expression)
Definition: SDL_stdinc.h:144

◆ SDL_Swap64()

SDL_FORCE_INLINE Uint64 SDL_Swap64 ( Uint64  x)

Definition at line 199 of file SDL_endian.h.

References SDL_FORCE_INLINE, SDL_static_cast, and SDL_Swap32().

Referenced by SDL_Swap32().

200 {
201  Uint32 hi, lo;
202 
203  /* Separate into high and low 32-bit values and swap them */
204  lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
205  x >>= 32;
206  hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
207  x = SDL_Swap32(lo);
208  x <<= 32;
209  x |= SDL_Swap32(hi);
210  return (x);
211 }
uint32_t Uint32
Definition: SDL_stdinc.h:209
SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
Definition: SDL_endian.h:165
#define SDL_static_cast(type, expression)
Definition: SDL_stdinc.h:144

◆ SDL_SwapFloat()

SDL_FORCE_INLINE float SDL_SwapFloat ( float  x)

Definition at line 216 of file SDL_endian.h.

References SDL_Swap32().

217 {
218  union
219  {
220  float f;
221  Uint32 ui32;
222  } swapper;
223  swapper.f = x;
224  swapper.ui32 = SDL_Swap32(swapper.ui32);
225  return swapper.f;
226 }
uint32_t Uint32
Definition: SDL_stdinc.h:209
SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
Definition: SDL_endian.h:165