endian.h: define non-standard symbols for endian handling
BSDs and Unices defined some non standardised functions and symbols used for endianness handling: converting from Little Endian to Big Endian, converting from Host to a specific representation, converting from a specific representation to Host. With this commit, a modified version of those symbols provided by FreeBSD is imported. The license of the imported code is still 2-Clause BSD. Signed-off-by: Francesco Giancane <francesco.giancane@accenture.com> Closes https://github.com/espressif/esp-idf/pull/4784
This commit is contained in:
parent
6f8ce38f99
commit
1173ce32f6
1 changed files with 187 additions and 0 deletions
|
@ -22,4 +22,191 @@
|
||||||
#ifndef XTENSA_COMPAT_ENDIAN_H_INCLUDED
|
#ifndef XTENSA_COMPAT_ENDIAN_H_INCLUDED
|
||||||
#define XTENSA_COMPAT_ENDIAN_H_INCLUDED
|
#define XTENSA_COMPAT_ENDIAN_H_INCLUDED
|
||||||
#include <machine/endian.h>
|
#include <machine/endian.h>
|
||||||
|
|
||||||
|
/*
|
||||||
|
* All the code below is a rework of
|
||||||
|
* https://github.com/freebsd/freebsd/blob/master/sys/sys/endian.h
|
||||||
|
* to import symbols defining non-standard endian handling functions.
|
||||||
|
* The aforementioned source code license terms are included here.
|
||||||
|
* For further license info, please look at https://github.com/freebsd/freebsd
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*-
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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)
|
||||||
|
{
|
||||||
|
uint8_t const *p = (uint8_t const *)pp;
|
||||||
|
|
||||||
|
return ((p[0] << 8) | p[1]);
|
||||||
|
}
|
||||||
|
|
||||||
|
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]);
|
||||||
|
}
|
||||||
|
|
||||||
|
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));
|
||||||
|
}
|
||||||
|
|
||||||
|
static __inline uint16_t
|
||||||
|
le16dec(const void *pp)
|
||||||
|
{
|
||||||
|
uint8_t const *p = (uint8_t const *)pp;
|
||||||
|
|
||||||
|
return ((p[1] << 8) | p[0]);
|
||||||
|
}
|
||||||
|
|
||||||
|
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]);
|
||||||
|
}
|
||||||
|
|
||||||
|
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));
|
||||||
|
}
|
||||||
|
|
||||||
|
static __inline void
|
||||||
|
be16enc(void *pp, uint16_t u)
|
||||||
|
{
|
||||||
|
uint8_t *p = (uint8_t *)pp;
|
||||||
|
|
||||||
|
p[0] = (u >> 8) & 0xff;
|
||||||
|
p[1] = u & 0xff;
|
||||||
|
}
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
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));
|
||||||
|
}
|
||||||
|
|
||||||
|
static __inline void
|
||||||
|
le16enc(void *pp, uint16_t u)
|
||||||
|
{
|
||||||
|
uint8_t *p = (uint8_t *)pp;
|
||||||
|
|
||||||
|
p[0] = u & 0xff;
|
||||||
|
p[1] = (u >> 8) & 0xff;
|
||||||
|
}
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
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 /* XTENSA_COMPAT_ENDIAN_H_INCLUDED */
|
#endif /* XTENSA_COMPAT_ENDIAN_H_INCLUDED */
|
||||||
|
|
Loading…
Reference in a new issue