[C/C++] Sample! inter-change between endians...

Language/C&C++ 2007.06.28 22:31
[[ blog 이사 과정에서 정확한 posting날짜가 분실됨. 년도와 분기 정도는 맞지 않을까? ]]

#define STORE_LE16(bUFF,nUM) ( ((bUFF)[1] = (UINT8) ((nUM)>>8)), \

                              ((bUFF)[0] = (UINT8) (nUM)) )

#define STORE_LE32(bUFF,nUM) ( ((bUFF)[3] = (UINT8) ((nUM)>>24)),    \
                              ((bUFF)[2] = (UINT8) ((nUM)>>16)),     \
                              ((bUFF)[1] = (UINT8) ((nUM)>>8)),      \
                              ((bUFF)[0] = (UINT8) (nUM)) )

/* Store value into a bUFFer in Big Endian format */
#define STORE_BE16(bUFF,nUM) ( ((bUFF)[0] = (UINT8) ((nUM)>>8)),     \
                              ((bUFF)[1] = (UINT8) (nUM)) )

#define STORE_BE32(bUFF,nUM) ( ((bUFF)[0] = (UINT8) ((nUM)>>24)),    \
                              ((bUFF)[1] = (UINT8) ((nUM)>>16)),     \
                              ((bUFF)[2] = (UINT8) ((nUM)>>8)),      \
                              ((bUFF)[3] = (UINT8) (nUM)) )

/* Little Endian to Host integer format conversion macros */
#define LEtoHost16(ptr)  (U16)( ((U16) *((U8*)(ptr)+1) << 8) | \
                                ((U16) *((U8*)(ptr))) )

#define LEtoHost32(ptr)  (U32)( ((U32) *((U8*)(ptr)+3) << 24) | \
                                ((U32) *((U8*)(ptr)+2) << 16) | \
                                ((U32) *((U8*)(ptr)+1) << 8)  | \
                                ((U32) *((U8*)(ptr))) )

/* Big Endian to Host integer format conversion macros */
#define BEtoHost16(ptr)  (U16)( ((U16) *((U8*)(ptr)) << 8) | \
                                ((U16) *((U8*)(ptr)+1)) )

#define BEtoHost32(ptr)  (U32)( ((U32) *((U8*)(ptr)) << 24)   | \
                                ((U32) *((U8*)(ptr)+1) << 16) | \
                                ((U32) *((U8*)(ptr)+2) << 8)  | \
                                ((U32) *((U8*)(ptr)+3)) )
신고
tags : ,
Trackback 0 : Comment 0

티스토리 툴바