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7152e5efbb
Also removed the lib-dir merging with sysdep. Updated #include's accordingly. Fixed make doc on recent Debian together with moving generated doc into objdir. Moved Makefile.in into root dir Retired all.o and birdlib.a Linking the final binaries directly from all the .o files.
73 lines
1.2 KiB
C
73 lines
1.2 KiB
C
/*
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* Unaligned Data Accesses -- Generic Version, Network Order
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*
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* (c) 2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_UNALIGNED_H_
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#define _BIRD_UNALIGNED_H_
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/*
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* We don't do any clever tricks with unaligned accesses since it's
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* virtually impossible to figure out what alignment does the CPU want
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* (unaligned accesses can be emulated by the OS which makes them work,
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* but unusably slow). We use memcpy and hope GCC will optimize it out
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* if possible.
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*/
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#include "sysdep/unix/endian.h"
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#include "lib/string.h"
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static inline u16
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get_u16(const void *p)
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{
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u16 x;
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memcpy(&x, p, 2);
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return ntohs(x);
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}
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static inline u32
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get_u32(const void *p)
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{
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u32 x;
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memcpy(&x, p, 4);
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return ntohl(x);
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}
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static inline u64
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get_u64(const void *p)
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{
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u32 xh, xl;
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memcpy(&xh, p, 4);
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memcpy(&xl, p+4, 4);
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return (((u64) ntohl(xh)) << 32) | ntohl(xl);
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}
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static inline void
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put_u16(void *p, u16 x)
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{
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x = htons(x);
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memcpy(p, &x, 2);
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}
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static inline void
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put_u32(void *p, u32 x)
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{
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x = htonl(x);
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memcpy(p, &x, 4);
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}
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static inline void
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put_u64(void *p, u64 x)
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{
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u32 xh, xl;
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xh = htonl(x >> 32);
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xl = htonl((u32) x);
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memcpy(p, &xh, 4);
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memcpy(p+4, &xl, 4);
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}
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#endif
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