* Copyright 2017 Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef _BSD_ENDIAN_H_
#define _BSD_ENDIAN_H_
#include_next <endian.h>
#include <features.h>
#include <stdint.h>
#ifdef _DEFAULT_SOURCE
#include <config/HaikuConfig.h>
#if __GNUC__ < 4
#include <support/ByteOrder.h>
#include <support/SupportDefs.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
* General byte order swapping functions.
*/
#if __GNUC__ >= 4
#define bswap16(x) __builtin_bswap16(x)
#define bswap32(x) __builtin_bswap32(x)
#define bswap64(x) __builtin_bswap64(x)
#else
#define bswap16(x) __swap_int16(x)
#define bswap32(x) __swap_int32(x)
#define bswap64(x) __swap_int64(x)
#endif
* Host to big endian, host to little endian, big endian to host, and little
* endian to host byte order functions as detailed in byteorder(9).
*/
#if BYTE_ORDER == LITTLE_ENDIAN
#define htobe16(x) bswap16((x))
#define htobe32(x) bswap32((x))
#define htobe64(x) bswap64((x))
#define htole16(x) ((uint16_t)(x))
#define htole32(x) ((uint32_t)(x))
#define htole64(x) ((uint64_t)(x))
#define be16toh(x) bswap16((x))
#define be32toh(x) bswap32((x))
#define be64toh(x) bswap64((x))
#define le16toh(x) ((uint16_t)(x))
#define le32toh(x) ((uint32_t)(x))
#define le64toh(x) ((uint64_t)(x))
#else
#define htobe16(x) ((uint16_t)(x))
#define htobe32(x) ((uint32_t)(x))
#define htobe64(x) ((uint64_t)(x))
#define htole16(x) bswap16((x))
#define htole32(x) bswap32((x))
#define htole64(x) bswap64((x))
#define be16toh(x) ((uint16_t)(x))
#define be32toh(x) ((uint32_t)(x))
#define be64toh(x) ((uint64_t)(x))
#define le16toh(x) bswap16((x))
#define le32toh(x) bswap32((x))
#define le64toh(x) bswap64((x))
#endif
static __inline uint32_t
be32dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
}
static __inline uint64_t
be64dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
}
static __inline void
be32enc(void *pp, uint32_t u)
{
uint8_t *p = (uint8_t *)pp;
p[0] = (u >> 24) & 0xff;
p[1] = (u >> 16) & 0xff;
p[2] = (u >> 8) & 0xff;
p[3] = u & 0xff;
}
static __inline void
be64enc(void *pp, uint64_t u)
{
uint8_t *p = (uint8_t *)pp;
be32enc(p, (uint32_t)(u >> 32));
be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
}
#ifdef __cplusplus
}
#endif
#endif
#endif
