/*-

 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD

 *

 * Copyright (c) 2003,2010 Poul-Henning Kamp <phk@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 AUTHORS 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 AUTHORS 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.

 *

 * From:

 * $FreeBSD: head/sys/sys/endian.h 121122 2003-10-15 20:05:57Z obrien $

 *

 * Endian conversion functions

 */

#ifndef VEND_H_INCLUDED

#define VEND_H_INCLUDED

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

static __inline uint16_t

vbe16dec(const void *pp)

{

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

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

}

static __inline uint32_t

vbe32dec(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

vbe64dec(const void *pp)

{

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

  return (((uint64_t)vbe32dec(p) << 32) | vbe32dec(p + 4));

}

#if 0

static __inline uint16_t

vle16dec(const void *pp)

{

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

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

}

#endif

static __inline uint32_t

vle32dec(const void *pp)

{

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

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

}

#if 0

static __inline uint64_t

vle64dec(const void *pp)

{

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

  return (((uint64_t)vle32dec(p + 4) << 32) | vle32dec(p));

}

#endif

static __inline void

vbe16enc(void *pp, uint16_t u)

{

  uint8_t *p = (uint8_t *)pp;

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

  p[1] = u & 0xff;

}

static __inline void

vbe32enc(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

vbe64enc(void *pp, uint64_t u)

{

  uint8_t *p = (uint8_t *)pp;

  vbe32enc(p, (uint32_t)(u >> 32));

  vbe32enc(p + 4, (uint32_t)(u & 0xffffffffU));

}

static __inline void

vle16enc(void *pp, uint16_t u)

{

  uint8_t *p = (uint8_t *)pp;

  p[0] = u & 0xff;

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

}

static __inline void

vle32enc(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;

}

#if 0

static __inline void

vle64enc(void *pp, uint64_t u)

{

  uint8_t *p = (uint8_t *)pp;

  vle32enc(p, (uint32_t)(u & 0xffffffffU));

  vle32enc(p + 4, (uint32_t)(u >> 32));

}

#endif

#endif