mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-13 22:58:42 +00:00
53 lines
924 B
C
53 lines
924 B
C
/*
|
|
* Unaligned Data Accesses -- Generic Version, Network Order
|
|
*
|
|
* (c) 2000 Martin Mares <mj@ucw.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_UNALIGNED_H_
|
|
#define _BIRD_UNALIGNED_H_
|
|
|
|
/*
|
|
* We don't do any clever tricks with unaligned accesses since it's
|
|
* virtually impossible to figure out what alignment does the CPU want
|
|
* (unaligned accesses can be emulated by the OS which makes them work,
|
|
* but unusably slow). We use memcpy and hope GCC will optimize it out
|
|
* if possible.
|
|
*/
|
|
|
|
#include "lib/string.h"
|
|
|
|
static inline u16
|
|
get_u16(void *p)
|
|
{
|
|
u16 x;
|
|
memcpy(&x, p, 2);
|
|
return ntohs(x);
|
|
}
|
|
|
|
static inline u32
|
|
get_u32(void *p)
|
|
{
|
|
u32 x;
|
|
memcpy(&x, p, 4);
|
|
return ntohl(x);
|
|
}
|
|
|
|
static inline void
|
|
put_u16(void *p, u16 x)
|
|
{
|
|
x = htons(x);
|
|
memcpy(p, &x, 2);
|
|
}
|
|
|
|
static inline void
|
|
put_u32(void *p, u32 x)
|
|
{
|
|
x = htonl(x);
|
|
memcpy(p, &x, 4);
|
|
}
|
|
|
|
#endif
|