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Added generic functions for unaligned data access.

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This commit is contained in:
Martin Mares 1998-05-26 21:38:06 +00:00
parent ed68a5c6a4
commit b1487ee909
1 changed files with 31 additions and 1 deletions
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32
lib/unaligned.h
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@ -1,5 +1,5 @@
/* /*
* Unaligned Data Accesses * Unaligned Data Accesses -- Generic Version
* *
* (c) 1998 Martin Mares <mj@ucw.cz> * (c) 1998 Martin Mares <mj@ucw.cz>
* *
@ -9,4 +9,34 @@
#ifndef _BIRD_UNALIGNED_H_ #ifndef _BIRD_UNALIGNED_H_
#define _BIRD_UNALIGNED_H_ #define _BIRD_UNALIGNED_H_
#if CPU_NEEDS_ALIGN_WORD != 1 || CPU_NEEDS_ALIGN_LONG != 1
#include <string.h>
#endif
#if CPU_NEEDS_ALIGN_WORD == 1
#define unaligned_u16(p) (*((u16 *)(p)))
#else
static inline u16
unaligned_u16(void *p)
{
u16 x;
memcpy(&x, p, sizeof(x));
return x;
}
#endif
#if CPU_NEEDS_ALIGN_LONG == 1
#define unaligned_u32(p) (*((u32 *)(p)))
#else
static inline u32
unaligned_u32(void *p)
{
u32 x;
memcpy(&x, p, sizeof(x));
return x;
}
#endif
#endif #endif