79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
#pragma once
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#if !defined(_BYTE_ORDER)
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#define _BIG_ENDIAN 4321
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#define _LITTLE_ENDIAN 1234
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#define TEST_LITTLE_ENDIAN (((union { unsigned x; unsigned char c; }){1}).c)
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#ifdef TEST_LITTLE_ENDIAN
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#define _BYTE_ORDER _LITTLE_ENDIAN
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#else
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#define _BYTE_ORDER _BIG_ENDIAN
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#endif
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#undef TEST_LITTLE_ENDIAN
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#include <stdint.h>
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#ifdef __GNUC__
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#define __bswap16(_x) __builtin_bswap16(_x)
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#define __bswap32(_x) __builtin_bswap32(_x)
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#define __bswap64(_x) __builtin_bswap64(_x)
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#else /* __GNUC__ */
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static __inline __uint16_t
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__bswap16(__uint16_t _x)
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{
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return ((__uint16_t)((_x >> 8) | ((_x << 8) & 0xff00)));
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}
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static __inline __uint32_t
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__bswap32(__uint32_t _x)
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{
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return ((__uint32_t)((_x >> 24) | ((_x >> 8) & 0xff00) |
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((_x << 8) & 0xff0000) | ((_x << 24) & 0xff000000)));
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}
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static __inline __uint64_t
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__bswap64(__uint64_t _x)
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{
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return ((__uint64_t)((_x >> 56) | ((_x >> 40) & 0xff00) |
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((_x >> 24) & 0xff0000) | ((_x >> 8) & 0xff000000) |
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((_x << 8) & ((__uint64_t)0xff << 32)) |
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((_x << 24) & ((__uint64_t)0xff << 40)) |
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((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))));
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}
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#endif /* !__GNUC__ */
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#ifndef __machine_host_to_from_network_defined
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#if _BYTE_ORDER == _LITTLE_ENDIAN
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#define __ntohs(x) __bswap16(x)
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#define __htons(x) __bswap16(x)
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#define __ntohl(x) __bswap32(x)
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#define __htonl(x) __bswap32(x)
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#define __ntohll(x) __bswap64(x)
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#define __htonll(x) __bswap64(x)
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#else // BIG_ENDIAN
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#define __ntohl(x) ((uint32_t)(x))
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#define __ntohs(x) ((uint16_t)(x))
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#define __htonl(x) ((uint32_t)(x))
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#define __htons(x) ((uint16_t)(x))
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#define __ntohll(x) ((uint64_t)(x))
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#define __htonll(x) ((uint64_t)(x))
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#endif
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#endif /* __machine_host_to_from_network_defined */
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#endif /* _BYTE_ORDER */
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#ifndef __machine_host_to_from_network_defined
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#if _BYTE_ORDER == _LITTLE_ENDIAN
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#define __ntohll(x) __bswap64(x)
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#define __htonll(x) __bswap64(x)
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#else // BIG_ENDIAN
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#define __ntohll(x) ((uint64_t)(x))
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#define __htonll(x) ((uint64_t)(x))
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#endif
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#endif /* __machine_host_to_from_network_defined */
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