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