/*-

  * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  *

  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  *

  * $FreeBSD: src/sys/sys/endian.h,v 1.6 2003/10/15 20:05:57 obrien Exp $

  */

 #ifndef _SYS_ENDIAN_H_

 #define _SYS_ENDIAN_H_

 #include <sys/cdefs.h>

 #include <sys/_types.h>

 #include <machine/endian.h>

 #ifndef _UINT16_T_DECLARED

 typedef	__uint16_t	uint16_t;

 #define	_UINT16_T_DECLARED

 #endif

 #ifndef _UINT32_T_DECLARED

 typedef	__uint32_t	uint32_t;

 #define	_UINT32_T_DECLARED

 #endif

 #ifndef _UINT64_T_DECLARED

 typedef	__uint64_t	uint64_t;

 #define	_UINT64_T_DECLARED

 #endif

 /*

  * General byte order swapping functions.

  */

 #define	bswap16(x)	__bswap16(x)

 #define	bswap32(x)	__bswap32(x)

 #define	bswap64(x)	__bswap64(x)

 /*

  * 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 /* _BYTE_ORDER != _LITTLE_ENDIAN */

 #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 /* _BYTE_ORDER == _LITTLE_ENDIAN */

 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */

 static __inline uint16_t

 be16dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return ((p[0] << 8) | p[1]);

 }

 static __inline uint32_t

 be32dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);

 }

 static __inline uint64_t

 be64dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));

 }

 static __inline uint16_t

 le16dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return ((p[1] << 8) | p[0]);

 }

 static __inline uint32_t

 le32dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);

 }

 static __inline uint64_t

 le64dec(const void *pp)

 {

 	unsigned char const *p = (unsigned char const *)pp;

 	return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));

 }

 static __inline void

 be16enc(void *pp, uint16_t u)

 {

 	unsigned char *p = (unsigned char *)pp;

 	p[0] = (u >> 8) & 0xff;

 	p[1] = u & 0xff;

 }

 static __inline void

 be32enc(void *pp, uint32_t u)

 {

 	unsigned char *p = (unsigned char *)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)

 {

 	unsigned char *p = (unsigned char *)pp;

 	be32enc(p, u >> 32);

 	be32enc(p + 4, u & 0xffffffff);

 }

 static __inline void

 le16enc(void *pp, uint16_t u)

 {

 	unsigned char *p = (unsigned char *)pp;

 	p[0] = u & 0xff;

 	p[1] = (u >> 8) & 0xff;

 }

 static __inline void

 le32enc(void *pp, uint32_t u)

 {

 	unsigned char *p = (unsigned char *)pp;

 	p[0] = u & 0xff;

 	p[1] = (u >> 8) & 0xff;

 	p[2] = (u >> 16) & 0xff;

 	p[3] = (u >> 24) & 0xff;

 }

 static __inline void

 le64enc(void *pp, uint64_t u)

 {

 	unsigned char *p = (unsigned char *)pp;

 	le32enc(p, u & 0xffffffff);

 	le32enc(p + 4, u >> 32);

 }

 #endif	/* _SYS_ENDIAN_H_ */