endian.h revision 95737
1/*- 2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/sys/endian.h 95737 2002-04-29 16:58:54Z mike $ 27 */ 28 29#ifndef _SYS_ENDIAN_H_ 30#define _SYS_ENDIAN_H_ 31 32#include <sys/cdefs.h> 33#include <sys/_types.h> 34#include <machine/endian.h> 35 36#ifndef _UINT16_T_DECLARED 37typedef __uint16_t uint16_t; 38#define _UINT16_T_DECLARED 39#endif 40 41#ifndef _UINT32_T_DECLARED 42typedef __uint32_t uint32_t; 43#define _UINT32_T_DECLARED 44#endif 45 46#ifndef _UINT64_T_DECLARED 47typedef __uint64_t uint64_t; 48#define _UINT64_T_DECLARED 49#endif 50 51/* 52 * General byte order swapping functions. 53 */ 54#define bswap16(x) __bswap16(x) 55#define bswap32(x) __bswap32(x) 56#define bswap64(x) __bswap64(x) 57 58/* 59 * Host to big endian, host to little endian, big endian to host, and little 60 * endian to host byte order functions as detailed in byteorder(9). 61 */ 62#if _BYTE_ORDER == _LITTLE_ENDIAN 63#define htobe16(x) bswap16((x)) 64#define htobe32(x) bswap32((x)) 65#define htobe64(x) bswap64((x)) 66#define htole16(x) ((uint16_t)(x)) 67#define htole32(x) ((uint32_t)(x)) 68#define htole64(x) ((uint64_t)(x)) 69 70#define be16toh(x) bswap16((x)) 71#define be32toh(x) bswap32((x)) 72#define be64toh(x) bswap64((x)) 73#define le16toh(x) ((uint16_t)(x)) 74#define le32toh(x) ((uint32_t)(x)) 75#define le64toh(x) ((uint64_t)(x)) 76#else /* _BYTE_ORDER != _LITTLE_ENDIAN */ 77#define htobe16(x) ((uint16_t)(x)) 78#define htobe32(x) ((uint32_t)(x)) 79#define htobe64(x) ((uint64_t)(x)) 80#define htole16(x) bswap16((x)) 81#define htole32(x) bswap32((x)) 82#define htole64(x) bswap64((x)) 83 84#define be16toh(x) ((uint16_t)(x)) 85#define be32toh(x) ((uint32_t)(x)) 86#define be64toh(x) ((uint64_t)(x)) 87#define le16toh(x) bswap16((x)) 88#define le32toh(x) bswap32((x)) 89#define le64toh(x) bswap64((x)) 90#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */ 91 92#endif /* _SYS_ENDIAN_H_ */ 93