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1834e12564
Remove the `ByteOrder.h` and `SupportDefs.h` Haiku-specific headers from `bsd/endian.h` on GCC >= 4 and replace them with compiler builtins. This prevents some unwanted symbols like `type_code` causing name clashes in ported applications. Change-Id: Id88791ea5954c260f4e7f5e82a564f3ae6bafe69 Reviewed-on: https://review.haiku-os.org/c/haiku/+/7642 Haiku-Format: Haiku-format Bot <no-reply+haikuformatbot@haiku-os.org> Reviewed-by: waddlesplash <waddlesplash@gmail.com>
121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
/*
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* Copyright 2017 Haiku, Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _BSD_ENDIAN_H_
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#define _BSD_ENDIAN_H_
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#include_next <endian.h>
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#include <features.h>
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#include <stdint.h>
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#ifdef _DEFAULT_SOURCE
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#include <config/HaikuConfig.h>
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#if __GNUC__ < 4
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#include <support/ByteOrder.h>
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#include <support/SupportDefs.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* General byte order swapping functions.
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*/
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#if __GNUC__ >= 4
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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
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#define bswap16(x) __swap_int16(x)
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#define bswap32(x) __swap_int32(x)
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#define bswap64(x) __swap_int64(x)
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#endif
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/*
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* Host to big endian, host to little endian, big endian to host, and little
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* endian to host byte order functions as detailed in byteorder(9).
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*/
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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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/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
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static __inline uint32_t
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be32dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
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}
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static __inline uint64_t
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be64dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
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}
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static __inline void
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be32enc(void *pp, uint32_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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p[0] = (u >> 24) & 0xff;
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p[1] = (u >> 16) & 0xff;
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p[2] = (u >> 8) & 0xff;
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p[3] = u & 0xff;
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}
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static __inline void
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be64enc(void *pp, uint64_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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be32enc(p, (uint32_t)(u >> 32));
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be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif /* _BSD_ENDIAN_H_ */
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