117 lines
3 KiB
C
117 lines
3 KiB
C
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/*
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* utils - misc libubox utility functions
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*
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* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __LIBUBOX_UTILS_H
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#define __LIBUBOX_UTILS_H
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif
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#ifdef __GNUC__
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#define _GNUC_MIN_VER(maj, min) (((__GNUC__ << 8) + __GNUC_MINOR__) >= (((maj) << 8) + (min)))
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#else
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#define _GNUC_MIN_VER(maj, min) 0
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#endif
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#if defined(__linux__) || defined(__CYGWIN__)
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#include <byteswap.h>
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#include <endian.h>
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#elif defined(__APPLE__)
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#include <machine/endian.h>
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#include <machine/byte_order.h>
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#define bswap_32(x) OSSwapInt32(x)
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#define bswap_64(x) OSSwapInt64(x)
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#elif defined(__FreeBSD__)
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#include <sys/endian.h>
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#define bswap_32(x) bswap32(x)
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#define bswap_64(x) bswap64(x)
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#else
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#include <machine/endian.h>
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#define bswap_32(x) swap32(x)
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#define bswap_64(x) swap64(x)
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#endif
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#ifndef __BYTE_ORDER
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#define __BYTE_ORDER BYTE_ORDER
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#endif
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#ifndef __BIG_ENDIAN
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#define __BIG_ENDIAN BIG_ENDIAN
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#endif
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#ifndef __LITTLE_ENDIAN
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#define __LITTLE_ENDIAN LITTLE_ENDIAN
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#endif
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static inline uint16_t __u_bswap16(uint16_t val)
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{
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return ((val >> 8) & 0xffu) | ((val & 0xffu) << 8);
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}
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#if _GNUC_MIN_VER(4, 2)
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#define __u_bswap32(x) __builtin_bswap32(x)
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#define __u_bswap64(x) __builtin_bswap64(x)
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#else
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#define __u_bswap32(x) bswap_32(x)
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#define __u_bswap64(x) bswap_64(x)
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#endif
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define cpu_to_be64(x) __u_bswap64(x)
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#define cpu_to_be32(x) __u_bswap32(x)
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#define cpu_to_be16(x) __u_bswap16((uint16_t) (x))
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#define be64_to_cpu(x) __u_bswap64(x)
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#define be32_to_cpu(x) __u_bswap32(x)
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#define be16_to_cpu(x) __u_bswap16((uint16_t) (x))
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#define cpu_to_le64(x) (x)
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#define cpu_to_le32(x) (x)
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#define cpu_to_le16(x) (x)
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#define le64_to_cpu(x) (x)
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#define le32_to_cpu(x) (x)
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#define le16_to_cpu(x) (x)
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#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
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#define cpu_to_le64(x) __u_bswap64(x)
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#define cpu_to_le32(x) __u_bswap32(x)
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#define cpu_to_le16(x) __u_bswap16((uint16_t) (x))
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#define le64_to_cpu(x) __u_bswap64(x)
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#define le32_to_cpu(x) __u_bswap32(x)
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#define le16_to_cpu(x) __u_bswap16((uint16_t) (x))
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#define cpu_to_be64(x) (x)
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#define cpu_to_be32(x) (x)
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#define cpu_to_be16(x) (x)
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#define be64_to_cpu(x) (x)
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#define be32_to_cpu(x) (x)
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#define be16_to_cpu(x) (x)
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#endif
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#endif
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