169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/*
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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 <sys/time.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <time.h>
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/*
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* calloc_a(size_t len, [void **addr, size_t len,...], NULL)
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*
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* allocate a block of memory big enough to hold multiple aligned objects.
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* the pointer to the full object (starting with the first chunk) is returned,
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* all other pointers are stored in the locations behind extra addr arguments.
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* the last argument needs to be a NULL pointer
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*/
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#define calloc_a(len, ...) __calloc_a(len, ##__VA_ARGS__, NULL)
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void *__calloc_a(size_t len, ...);
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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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#define __BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
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#ifdef __OPTIMIZE__
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extern int __BUILD_BUG_ON_CONDITION_FAILED;
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#define BUILD_BUG_ON(condition) \
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do { \
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__BUILD_BUG_ON(condition); \
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if (condition) \
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__BUILD_BUG_ON_CONDITION_FAILED = 1; \
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} while(0)
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#else
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#define BUILD_BUG_ON __BUILD_BUG_ON
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#endif
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#ifdef __APPLE__
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#define CLOCK_REALTIME 0
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#define CLOCK_MONOTONIC 1
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void clock_gettime(int type, struct timespec *tv);
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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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#define __u_bswap16(x) ({ uint16_t val = (x); ((uint16_t)(((val >> 8) & 0xffu) | ((val & 0xffu) << 8))); })
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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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#ifndef __packed
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#define __packed __attribute__((packed))
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#endif
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#ifndef BITS_PER_LONG
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#define BITS_PER_LONG (8 * sizeof(unsigned long))
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#endif
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static inline void bitfield_set(unsigned long *bits, int bit)
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{
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bits[bit / BITS_PER_LONG] |= (1UL << (bit % BITS_PER_LONG));
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}
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static inline bool bitfield_test(unsigned long *bits, int bit)
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{
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return !!(bits[bit / BITS_PER_LONG] & (1UL << (bit % BITS_PER_LONG)));
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}
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#endif
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