andreacavalli/xserver-multidpi
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Introduce swap_uint{16,32} functions, used in swap{l,s}

Browse Source 
Reviewed-by: Peter Harris <pharris@opentext.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Matt Turner 2011-08-16 19:03:26 -04:00
parent 54770c980c
commit 893e86a49e
1 changed files with 20 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
include/misc.h
View File

@ -256,20 +256,30 @@ version_compare(uint16_t a_major, uint16_t a_minor,
SwapLongs((CARD32 *)(stuff + 1), LengthRestL(stuff))
/* byte swap a 32-bit value */
static inline void swap_uint32(uint32_t *x)
{
char n = ((char *) &x)[0];
((char *) x)[0] = ((char *) x)[3];
((char *) x)[3] = n;
n = ((char *) x)[1];
((char *) x)[1] = ((char *) x)[2];
((char *) x)[2] = n;
}
#define swapl(x) do { \
char n = ((char *) (x))[0];\
((char *) (x))[0] = ((char *) (x))[3];\
((char *) (x))[3] = n;\
n = ((char *) (x))[1];\
((char *) (x))[1] = ((char *) (x))[2];\
((char *) (x))[2] = n;\
swap_uint32((uint32_t *)(x)); \
} while (0)
/* byte swap a short */
/* byte swap a 16-bit value */
static inline void swap_uint16(uint16_t *x)
{
char n = ((char *) x)[0];
((char *) x)[0] = ((char *) x)[1];
((char *) x)[1] = n;
}
#define swaps(x) do { \
char n = ((char *) (x))[0];\
((char *) (x))[0] = ((char *) (x))[1];\
((char *) (x))[1] = n;\
swap_uint16((uint16_t *)(x)); \
} while (0)
/* copy 32-bit value from src to dst byteswapping on the way */