mirror of
https://github.com/thepigeongenerator/mcaselector-lite.git
synced 2025-12-16 19:45:46 +01:00
Quinn
d9ddae770a
this is the most portable and clean approach. Compiler built-ins should always be present regardless, and is more maintainable, since we're not trying to keep up with various versions of this header.
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/* Copyright (c) 2025 Quinn
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* Licensed under the MIT Licence. See LICENSE for details */
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#ifndef PORTABLE_ENDIAN_H
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#define PORTABLE_ENDIAN_H 1
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#if defined(__GNUC__)
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define le16toh(x) __uint16_identity(x)
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#define le32toh(x) __uint32_identity(x)
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#define le64toh(x) __uint64_identity(x)
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#define htole16(x) __uint16_identity(x)
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#define htole32(x) __uint32_identity(x)
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#define htole64(x) __uint64_identity(x)
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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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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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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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#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 be16toh(x) __uint16_identity(x)
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#define be32toh(x) __uint32_identity(x)
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#define be64toh(x) __uint64_identity(x)
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#define htobe16(x) __uint16_identity(x)
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#define htobe32(x) __uint32_identity(x)
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#define htobe64(x) __uint64_identity(x)
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#else
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#error machine architecture unsupported! Expected either big-endian or little-endian, make sure to use a compiler which defines __BYTE_ORDER__ (like clang or gcc)
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#endif /* byte order */
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#else
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#error GNU C is unavailable
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#endif /* __GNUC__ */
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#endif /* PORTABLE_ENDIAN_H */
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