mirror of
https://github.com/SerenityOS/serenity
synced 2026-04-25 17:15:42 +02:00
835be1085d
No behavior change. This makes it a bit easier to compare the header with the POSIX spec.
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <sys/cdefs.h>
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// https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/endian.h.html
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// "Inclusion of the <endian.h> header may also make visible all symbols from <stdint.h>."
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#include <stdint.h>
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__BEGIN_DECLS
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// "BYTE_ORDER
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// This macro shall have a value equal to one of the *_ENDIAN macros in this header."
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#define BYTE_ORDER __BYTE_ORDER__
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// "LITTLE_ENDIAN
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// If BYTE_ORDER == LITTLE_ENDIAN, the host byte order is from least significant to most significant."
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#define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
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// "BIG_ENDIAN
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// If BYTE_ORDER == BIG_ENDIAN, the host byte order is from most significant to least significant."
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#define BIG_ENDIAN __ORDER_BIG_ENDIAN__
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// These definitions are not required by POSIX, but are assumed to be present by some ports.
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#define __BYTE_ORDER BYTE_ORDER
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#define __LITTLE_ENDIAN LITTLE_ENDIAN
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#define __BIG_ENDIAN BIG_ENDIAN
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#if BYTE_ORDER == LITTLE_ENDIAN
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# define be16toh(x) (__builtin_bswap16(x))
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# define be32toh(x) (__builtin_bswap32(x))
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# define be64toh(x) (__builtin_bswap64(x))
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# define htobe16(x) (__builtin_bswap16(x))
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# define htobe32(x) (__builtin_bswap32(x))
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# define htobe64(x) (__builtin_bswap64(x))
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# define htole16(x) ((uint16_t)(x))
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# define htole32(x) ((uint32_t)(x))
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# define htole64(x) ((uint64_t)(x))
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# define le16toh(x) ((uint16_t)(x))
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# define le32toh(x) ((uint32_t)(x))
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# define le64toh(x) ((uint64_t)(x))
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#else
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# define be16toh(x) ((uint16_t)(x))
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# define be32toh(x) ((uint32_t)(x))
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# define be64toh(x) ((uint64_t)(x))
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# define htobe16(x) ((uint16_t)(x))
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# define htobe32(x) ((uint32_t)(x))
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# define htobe64(x) ((uint64_t)(x))
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# define htole16(x) (__builtin_bswap16(x))
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# define htole32(x) (__builtin_bswap32(x))
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# define htole64(x) (__builtin_bswap64(x))
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# define le16toh(x) (__builtin_bswap16(x))
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# define le32toh(x) (__builtin_bswap32(x))
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# define le64toh(x) (__builtin_bswap64(x))
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#endif
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__END_DECLS
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