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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013, 2022 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef COMPAT_ENDIAN_H
#define COMPAT_ENDIAN_H
#ifndef BYTE_ORDER
# undef LITTLE_ENDIAN
# define LITTLE_ENDIAN 1234
# undef BIG_ENDIAN
# define BIG_ENDIAN 4321
# undef UNKNOWN_ENDIAN
# define UNKNOWN_ENDIAN 0
/*
* Attempt to guess endianness.
* Solaris may define _LITTLE_ENDIAN and _BIG_ENDIAN to 1
* HP-UX may define __LITTLE_ENDIAN__ and __BIG_ENDIAN__ to 1
* Otherwise, check for cpu-specific cpp defines.
* Note that some CPUs are bi-endian, including: arm, powerpc, alpha,
* sparc64, mips, hppa, sh4 and ia64.
* We just check for the most common uses.
*/
# if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
# define BYTE_ORDER LITTLE_ENDIAN
# elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
(__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
# define BYTE_ORDER BIG_ENDIAN
# elif defined(__BYTE_ORDER)
# define BYTE_ORDER __BYTE_ORDER
# elif defined(_BYTE_ORDER)
# define BYTE_ORDER _BYTE_ORDER
# elif defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__)
# define BYTE_ORDER LITTLE_ENDIAN
# elif defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
# define BYTE_ORDER BIG_ENDIAN
# elif defined(__alpha__) || defined(__alpha) || defined(__amd64) || \
defined(BIT_ZERO_ON_RIGHT) || defined(i386) || defined(__i386) || \
defined(MIPSEL) || defined(_MIPSEL) || defined(ns32000) || \
defined(__ns3200) || defined(sun386) || defined(vax) || \
defined(__vax) || defined(__x86__) || defined(__riscv) || \
(defined(sun) && defined(__powerpc)) || \
(!defined(__hpux) && defined(__ia64))
# define BYTE_ORDER LITTLE_ENDIAN
# elif defined(__68k__) || defined(apollo) || defined(BIT_ZERO_ON_LEFT) || \
defined(__convex__) || defined(_CRAY) || defined(DGUX) || \
defined(__hppa) || defined(__hp9000) || defined(__hp9000s300) || \
defined(__hp9000s700) || defined(__hp3000s900) || \
defined(ibm032) || defined(ibm370) || defined(_IBMR2) || \
defined(is68k) || defined(mc68000) || defined(m68k) || \
defined(__m68k) || defined(m88k) || defined(__m88k) || \
defined(MIPSEB) || defined(_MIPSEB) || defined(MPE) || \
defined(pyr) || defined(__powerpc) || defined(__powerpc__) || \
defined(sel) || defined(__sparc) || defined(__sparc__) || \
defined(tahoe) || (defined(__hpux) && defined(__ia64)) || \
(defined(sun) && defined(__powerpc))
# define BYTE_ORDER BIG_ENDIAN
# else
# define BYTE_ORDER UNKNOWN_ENDIAN
# endif
#endif /* BYTE_ORDER */
#endif /* COMPAT_ENDIAN_H */
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