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/*-
* 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
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