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120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
#ifndef __mpw_endian_h__
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#define __mpw_endian_h__
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#include "config.h"
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#include <stdint.h>
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#if defined(HAVE_ENDIAN_H)
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#include <endian.h>
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#elif defined(HAVE_SYS_ENDIAN_H)
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#include <sys/endian.h>
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#elif defined(HAVE_MACHINE_ENDIAN_H)
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#include <machine/endian.h>
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#else
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/* aix doesn't have an endian, but gcc #defines _BIG_ENDIAN=1 and __BIG_ENDIAN__=1 */
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#error missing endian.h
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#endif
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#ifdef __APPLE__
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#define bswap16 __builtin_bswap16
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#define bswap32 __builtin_bswap32
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#define bswap64 __builtin_bswap64
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define htobe16(x) bswap16((x))
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#define htobe32(x) bswap32((x))
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#define htobe64(x) 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 be16toh(x) bswap16((x))
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#define be32toh(x) bswap32((x))
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#define be64toh(x) bswap64((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 /* BYTE_ORDER != LITTLE_ENDIAN */
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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) bswap16((x))
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#define htole32(x) bswap32((x))
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#define htole64(x) bswap64((x))
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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 le16toh(x) bswap16((x))
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#define le32toh(x) bswap32((x))
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#define le64toh(x) bswap64((x))
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#endif /* BYTE_ORDER == LITTLE_ENDIAN */
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#endif
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#ifdef _WIN32
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#include <stdlib.h>
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#define bswap16 _byteswap_ushort
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#define bswap32 _byteswap_ulong
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#define bswap64 _byteswap_uint64
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define htobe16(x) bswap16((x))
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#define htobe32(x) bswap32((x))
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#define htobe64(x) 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 be16toh(x) bswap16((x))
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#define be32toh(x) bswap32((x))
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#define be64toh(x) bswap64((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 /* BYTE_ORDER != LITTLE_ENDIAN */
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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) bswap16((x))
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#define htole32(x) bswap32((x))
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#define htole64(x) bswap64((x))
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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 le16toh(x) bswap16((x))
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#define le32toh(x) bswap32((x))
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#define le64toh(x) bswap64((x))
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#endif /* BYTE_ORDER == LITTLE_ENDIAN */
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#endif
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#ifdef __cplusplus
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// https://github.com/HowardHinnant/hash_append/blob/master/endian.h
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enum class endian
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{
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native = LITTLE_ENDIAN,
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little = LITTLE_ENDIAN,
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big = BIG_ENDIAN
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};
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static_assert(endian::native == endian::little ||
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endian::native == endian::big,
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"endian::native shall be one of endian::little or endian::big");
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static_assert(endian::big != endian::little,
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"endian::big and endian::little shall have different values");
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#endif
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#endif
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