Adding upstream version 2.41.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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include/bitops.h
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include/bitops.h
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/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*
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* Written by Karel Zak <kzak@redhat.com>
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*/
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#ifndef BITOPS_H
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#define BITOPS_H
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#include <stdint.h>
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#include <sys/param.h>
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#if defined(HAVE_BYTESWAP_H)
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# include <byteswap.h>
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#endif
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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) /* BSDs have them here */
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# include <sys/endian.h>
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#endif
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#if !(defined(HAVE_BYTESWAP_H) && defined(HAVE_ENDIAN_H))
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/*
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* When both byteswap.h and endian.h are preseent, the proper macros are defined
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* as those files are glibc compatible. Otherwise, compensate for the slightly
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* different interfaces between the different BSDs.
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*/
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#if defined(__OpenBSD__)
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# include <sys/types.h>
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# define be16toh(x) betoh16(x)
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# define be32toh(x) betoh32(x)
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# define be64toh(x) betoh64(x)
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#elif defined(__NetBSD__) || defined(__DragonFly__)
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# define bswap_16(x) bswap16(x)
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# define bswap_32(x) bswap32(x)
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# define bswap_64(x) bswap64(x)
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#elif defined(__APPLE__)
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# include <libkern/OSByteOrder.h>
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# define htobe16(x) OSSwapHostToBigInt16(x)
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# define htole16(x) OSSwapHostToLittleInt16(x)
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# define be16toh(x) OSSwapBigToHostInt16(x)
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# define le16toh(x) OSSwapLittleToHostInt16(x)
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# define htobe32(x) OSSwapHostToBigInt32(x)
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# define htole32(x) OSSwapHostToLittleInt32(x)
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# define be32toh(x) OSSwapBigToHostInt32(x)
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# define le32toh(x) OSSwapLittleToHostInt32(x)
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# define htobe64(x) OSSwapHostToBigInt64(x)
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# define htole64(x) OSSwapHostToLittleInt64(x)
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# define be64toh(x) OSSwapBigToHostInt64(x)
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# define le64toh(x) OSSwapLittleToHostInt64(x)
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# define bswap_16(x) OSSwapInt16(x)
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# define bswap_32(x) OSSwapInt32(x)
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# define bswap_64(x) OSSwapInt64(x)
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#endif
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#endif
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/*
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* Fallbacks
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* casts are necessary for constants, because we never know how for sure
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* how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
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*/
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#ifndef bswap_16
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# define bswap_16(x) ((uint16_t)( \
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(((uint16_t)(x) & 0x00FF) << 8) | \
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(((uint16_t)(x) & 0xFF00) >> 8)))
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#endif
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#ifndef bswap_32
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# define bswap_32(x) ((uint32_t)( \
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(((uint32_t)(x) & 0x000000FF) << 24) | \
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(((uint32_t)(x) & 0x0000FF00) << 8) | \
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(((uint32_t)(x) & 0x00FF0000) >> 8) | \
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(((uint32_t)(x) & 0xFF000000) >> 24)))
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#endif
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#ifndef bswap_64
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# define bswap_64(x) ((uint64_t)( \
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(((uint64_t)(x) & 0x00000000000000FFULL) << 56) | \
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(((uint64_t)(x) & 0x000000000000FF00ULL) << 40) | \
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(((uint64_t)(x) & 0x0000000000FF0000ULL) << 24) | \
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(((uint64_t)(x) & 0x00000000FF000000ULL) << 8) | \
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(((uint64_t)(x) & 0x000000FF00000000ULL) >> 8) | \
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(((uint64_t)(x) & 0x0000FF0000000000ULL) >> 24) | \
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(((uint64_t)(x) & 0x00FF000000000000ULL) >> 40) | \
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(((uint64_t)(x) & 0xFF00000000000000ULL) >> 56)))
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#endif
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#ifndef htobe16
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# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define htobe16(x) bswap_16 (x)
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# define htole16(x) (x)
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# define be16toh(x) bswap_16 (x)
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# define le16toh(x) (x)
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# define htobe32(x) bswap_32 (x)
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# define htole32(x) (x)
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# define be32toh(x) bswap_32 (x)
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# define le32toh(x) (x)
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# define htobe64(x) bswap_64 (x)
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# define htole64(x) (x)
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# define be64toh(x) bswap_64 (x)
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# define le64toh(x) (x)
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# else
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# define htobe16(x) (x)
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# define htole16(x) bswap_16 (x)
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# define be16toh(x) (x)
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# define le16toh(x) bswap_16 (x)
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# define htobe32(x) (x)
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# define htole32(x) bswap_32 (x)
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# define be32toh(x) (x)
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# define le32toh(x) bswap_32 (x)
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# define htobe64(x) (x)
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# define htole64(x) bswap_64 (x)
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# define be64toh(x) (x)
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# define le64toh(x) bswap_64 (x)
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# endif
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#endif
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/*
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* Byte swab macros (based on linux/byteorder/swab.h)
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*/
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#define swab16(x) bswap_16(x)
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#define swab32(x) bswap_32(x)
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#define swab64(x) bswap_64(x)
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#define cpu_to_le16(x) ((uint16_t) htole16(x))
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#define cpu_to_le32(x) ((uint32_t) htole32(x))
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#define cpu_to_le64(x) ((uint64_t) htole64(x))
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#define cpu_to_be16(x) ((uint16_t) htobe16(x))
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#define cpu_to_be32(x) ((uint32_t) htobe32(x))
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#define cpu_to_be64(x) ((uint64_t) htobe64(x))
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#define le16_to_cpu(x) ((uint16_t) le16toh(x))
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#define le32_to_cpu(x) ((uint32_t) le32toh(x))
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#define le64_to_cpu(x) ((uint64_t) le64toh(x))
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#define be16_to_cpu(x) ((uint16_t) be16toh(x))
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#define be32_to_cpu(x) ((uint32_t) be32toh(x))
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#define be64_to_cpu(x) ((uint64_t) be64toh(x))
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/*
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* Bit map related macros. Usually provided by libc.
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*/
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#ifndef NBBY
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# define NBBY CHAR_BIT
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#endif
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#ifndef setbit
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# define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
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# define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
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# define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
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# define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
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#endif
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#endif /* BITOPS_H */
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