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add some ugly byte swapping cruft in endian.h

This commit is contained in:
Rich Felker 2012-04-22 11:08:01 -04:00
parent b1b3d3525b
commit 8705a0f1af
1 changed files with 59 additions and 0 deletions
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59
include/endian.h
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@ -8,10 +8,69 @@
#include <bits/endian.h>
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define BIG_ENDIAN __BIG_ENDIAN
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#define PDP_ENDIAN __PDP_ENDIAN
#define BYTE_ORDER __BYTE_ORDER
#include <stdint.h>
static inline uint16_t __bswap16(uint16_t __x)
{
return __x<<8 | __x>>8;
}
static inline uint32_t __bswap32(uint32_t __x)
{
return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
}
static inline uint64_t __bswap64(uint64_t __x)
{
return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
}
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define htobe16(x) __bswap16(x)
#define be16toh(x) __bswap16(x)
#define betoh16(x) __bswap16(x)
#define htobe32(x) __bswap32(x)
#define be32toh(x) __bswap32(x)
#define betoh32(x) __bswap32(x)
#define htobe64(x) __bswap64(x)
#define be64toh(x) __bswap64(x)
#define betoh64(x) __bswap64(x)
#define htole16(x) (uint16_t)(x)
#define le16toh(x) (uint16_t)(x)
#define letoh16(x) (uint16_t)(x)
#define htole32(x) (uint32_t)(x)
#define le32toh(x) (uint32_t)(x)
#define letoh32(x) (uint32_t)(x)
#define htole64(x) (uint64_t)(x)
#define le64toh(x) (uint64_t)(x)
#define letoh64(x) (uint64_t)(x)
#else
#define htobe16(x) (uint16_t)(x)
#define be16toh(x) (uint16_t)(x)
#define betoh16(x) (uint16_t)(x)
#define htobe32(x) (uint32_t)(x)
#define be32toh(x) (uint32_t)(x)
#define betoh32(x) (uint32_t)(x)
#define htobe64(x) (uint64_t)(x)
#define be64toh(x) (uint64_t)(x)
#define betoh64(x) (uint64_t)(x)
#define htole16(x) __bswap16(x)
#define le16toh(x) __bswap16(x)
#define letoh16(x) __bswap16(x)
#define htole32(x) __bswap32(x)
#define le32toh(x) __bswap32(x)
#define letoh32(x) __bswap32(x)
#define htole64(x) __bswap64(x)
#define le64toh(x) __bswap64(x)
#define letoh64(x) __bswap64(x)
#endif
#endif
#endif