/*-

 * 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: releng/10.1/sys/sys/endian.h 208331 2010-05-20 06:16:13Z phk $

 */

#ifndef _ENDIAN_UTIL_H_

#define _ENDIAN_UTIL_H_

#include "pkg_config.h"

#include <sys/types.h>

#include <inttypes.h>

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

#if !HAVE_BE16DEC

static __inline uint16_t

be16dec(const void *pp)

{

	uint8_t const *p = (uint8_t const *)pp;

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

}

#endif

#if !HAVE_BE32DEC

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]);

}

#endif

#if !HAVE_BE64DEC

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));

}

#endif

#if !HAVE_LE16DEC

static __inline uint16_t

le16dec(const void *pp)

{

	uint8_t const *p = (uint8_t const *)pp;

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

}

#endif

#if !HAVE_LE32DEC

static __inline uint32_t

le32dec(const void *pp)

{

	uint8_t const *p = (uint8_t const *)pp;

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

}

#endif

#if !HAVE_LE64DEC

static __inline uint64_t

le64dec(const void *pp)

{

	uint8_t const *p = (uint8_t const *)pp;

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

}

#endif

#if !HAVE_BE16ENC

static __inline void

be16enc(void *pp, uint16_t u)

{

	uint8_t *p = (uint8_t *)pp;

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

	p[1] = u & 0xff;

}

#endif

#if !HAVE_BE32ENC

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;

}

#endif

#if !HAVE_BE64ENC

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));

}

#endif

#if !HAVE_LE16ENC

static __inline void

le16enc(void *pp, uint16_t u)

{

	uint8_t *p = (uint8_t *)pp;

	p[0] = u & 0xff;

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

}

#endif

#if !HAVE_LE32ENC

static __inline void

le32enc(void *pp, uint32_t u)

{

	uint8_t *p = (uint8_t *)pp;

	p[0] = u & 0xff;

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

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

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

}

#endif

#if !HAVE_LE64ENC

static __inline void

le64enc(void *pp, uint64_t u)

{

	uint8_t *p = (uint8_t *)pp;

	le32enc(p, (uint32_t)(u & 0xffffffffU));

	le32enc(p + 4, (uint32_t)(u >> 32));

}

#endif

#endif	/* _ENDIAN_UTIL_H_ */