mirror of
git://jb55.com/damus
synced 2024-09-18 19:23:49 +00:00
191 lines
8.7 KiB
C
191 lines
8.7 KiB
C
/*
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* Copyright (c) 2016 Mikkel Fahnøe Jørgensen, dvide.com
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*
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* (MIT License)
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* - The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* - The Software is provided "as is", without warranty of any kind, express or
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* implied, including but not limited to the warranties of merchantability,
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* fitness for a particular purpose and noninfringement. In no event shall the
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* authors or copyright holders be liable for any claim, damages or other
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* liability, whether in an action of contract, tort or otherwise, arising from,
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* out of or in connection with the Software or the use or other dealings in the
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* Software.
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*/
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#ifndef PUNLIGNED_H
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#define PUNLIGNED_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef PORTABLE_UNALIGNED_ACCESS
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#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
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#define PORTABLE_UNALIGNED_ACCESS 1
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#else
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#define PORTABLE_UNALIGNED_ACCESS 0
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#endif
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#endif
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/* `unaligned_read_16` might not be defined if endianness was not determined. */
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#if !defined(unaligned_read_le16toh)
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#include "pendian.h"
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#ifndef UINT8_MAX
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#include <stdint.h>
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#endif
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#if PORTABLE_UNALIGNED_ACCESS
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#define unaligned_read_16(p) (*(uint16_t*)(p))
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#define unaligned_read_32(p) (*(uint32_t*)(p))
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#define unaligned_read_64(p) (*(uint64_t*)(p))
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#define unaligned_read_le16toh(p) le16toh(*(uint16_t*)(p))
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#define unaligned_read_le32toh(p) le32toh(*(uint32_t*)(p))
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#define unaligned_read_le64toh(p) le64toh(*(uint64_t*)(p))
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#define unaligned_read_be16toh(p) be16toh(*(uint16_t*)(p))
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#define unaligned_read_be32toh(p) be32toh(*(uint32_t*)(p))
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#define unaligned_read_be64toh(p) be64toh(*(uint64_t*)(p))
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#define unaligned_write_16(p, v) (*(uint16_t*)(p) = (uint16_t)(v))
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#define unaligned_write_32(p, v) (*(uint32_t*)(p) = (uint32_t)(v))
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#define unaligned_write_64(p, v) (*(uint64_t*)(p) = (uint64_t)(v))
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#define unaligned_write_htole16(p, v) (*(uint16_t*)(p) = htole16(v))
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#define unaligned_write_htole32(p, v) (*(uint32_t*)(p) = htole32(v))
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#define unaligned_write_htole64(p, v) (*(uint64_t*)(p) = htole64(v))
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#define unaligned_write_htobe16(p, v) (*(uint16_t*)(p) = htobe16(v))
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#define unaligned_write_htobe32(p, v) (*(uint32_t*)(p) = htobe32(v))
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#define unaligned_write_htobe64(p, v) (*(uint64_t*)(p) = htobe64(v))
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#else
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#define unaligned_read_le16toh(p) ( \
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(((uint16_t)(((uint8_t *)(p))[0])) << 0) | \
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(((uint16_t)(((uint8_t *)(p))[1])) << 8))
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#define unaligned_read_le32toh(p) ( \
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(((uint32_t)(((uint8_t *)(p))[0])) << 0) | \
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(((uint32_t)(((uint8_t *)(p))[1])) << 8) | \
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(((uint32_t)(((uint8_t *)(p))[2])) << 16) | \
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(((uint32_t)(((uint8_t *)(p))[3])) << 24))
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#define unaligned_read_le64toh(p) ( \
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(((uint64_t)(((uint8_t *)(p))[0])) << 0) | \
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(((uint64_t)(((uint8_t *)(p))[1])) << 8) | \
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(((uint64_t)(((uint8_t *)(p))[2])) << 16) | \
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(((uint64_t)(((uint8_t *)(p))[3])) << 24) | \
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(((uint64_t)(((uint8_t *)(p))[4])) << 32) | \
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(((uint64_t)(((uint8_t *)(p))[5])) << 40) | \
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(((uint64_t)(((uint8_t *)(p))[6])) << 48) | \
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(((uint64_t)(((uint8_t *)(p))[7])) << 56))
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#define unaligned_read_be16toh(p) ( \
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(((uint16_t)(((uint8_t *)(p))[0])) << 8) | \
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(((uint16_t)(((uint8_t *)(p))[1])) << 0))
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#define unaligned_read_be32toh(p) ( \
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(((uint32_t)(((uint8_t *)(p))[0])) << 24) | \
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(((uint32_t)(((uint8_t *)(p))[1])) << 16) | \
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(((uint32_t)(((uint8_t *)(p))[2])) << 8) | \
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(((uint32_t)(((uint8_t *)(p))[3])) << 0))
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#define unaligned_read_be64toh(p) ( \
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(((uint64_t)(((uint8_t *)(p))[0])) << 56) | \
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(((uint64_t)(((uint8_t *)(p))[1])) << 48) | \
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(((uint64_t)(((uint8_t *)(p))[2])) << 40) | \
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(((uint64_t)(((uint8_t *)(p))[3])) << 32) | \
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(((uint64_t)(((uint8_t *)(p))[4])) << 24) | \
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(((uint64_t)(((uint8_t *)(p))[5])) << 16) | \
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(((uint64_t)(((uint8_t *)(p))[6])) << 8) | \
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(((uint64_t)(((uint8_t *)(p))[7])) << 0))
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#define unaligned_write_htole16(p, v) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 0); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 8); \
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} while (0)
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#define unaligned_write_htole32(p, v) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 0); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 8); \
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((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 16); \
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((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 24); \
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} while (0)
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#define unaligned_write_htole64(p) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 0); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 8); \
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((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 16); \
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((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 24); \
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((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 32); \
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((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 40); \
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((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 48); \
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((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 56); \
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} while (0)
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#define unaligned_write_htobe16(p, v) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 8); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 0); \
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} while (0)
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#define unaligned_write_htobe32(p, v) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 24); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 16); \
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((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 8); \
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((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 0); \
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} while (0)
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#define unaligned_write_htobe64(p) do { \
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((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 56); \
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((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 48); \
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((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 40); \
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((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 32); \
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((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 24); \
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((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 16); \
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((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 8); \
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((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 0); \
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} while (0)
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#if __LITTLE_ENDIAN__
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#define unaligned_read_16(p) unaligned_read_le16toh(p)
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#define unaligned_read_32(p) unaligned_read_le32toh(p)
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#define unaligned_read_64(p) unaligned_read_le64toh(p)
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#define unaligned_write_16(p) unaligned_write_htole16(p)
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#define unaligned_write_32(p) unaligned_write_htole32(p)
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#define unaligned_write_64(p) unaligned_write_htole64(p)
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#endif
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#if __BIG_ENDIAN__
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#define unaligned_read_16(p) unaligned_read_be16toh(p)
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#define unaligned_read_32(p) unaligned_read_be32toh(p)
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#define unaligned_read_64(p) unaligned_read_be64toh(p)
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#define unaligned_write_16(p) unaligned_write_htobe16(p)
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#define unaligned_write_32(p) unaligned_write_htobe32(p)
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#define unaligned_write_64(p) unaligned_write_htobe64(p)
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#endif
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* PUNALIGNED_H */
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