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