mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
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49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* lfs utility functions
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*
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* Copyright (c) 2017 Christopher Haster
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* Distributed under the Apache 2.0 license
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*/
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#ifndef LFS_UTIL_H
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#define LFS_UTIL_H
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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// Builtin functions, these may be replaced by more
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// efficient implementations in the system
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static inline uint32_t lfs_max(uint32_t a, uint32_t b) {
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return (a > b) ? a : b;
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}
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static inline uint32_t lfs_min(uint32_t a, uint32_t b) {
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return (a < b) ? a : b;
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}
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static inline uint32_t lfs_ctz(uint32_t a) {
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return __builtin_ctz(a);
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}
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static inline uint32_t lfs_npw2(uint32_t a) {
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return 32 - __builtin_clz(a-1);
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}
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static inline int lfs_scmp(uint32_t a, uint32_t b) {
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return (int)(unsigned)(a - b);
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}
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// CRC-32 with polynomial = 0x04c11db7
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void lfs_crc(uint32_t *crc, const void *buffer, size_t size);
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// Logging functions, these may be replaced by system-specific
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// logging functions
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#define LFS_DEBUG(fmt, ...) printf("lfs debug: " fmt "\n", __VA_ARGS__)
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#define LFS_WARN(fmt, ...) printf("lfs warn: " fmt "\n", __VA_ARGS__)
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#define LFS_ERROR(fmt, ...) printf("lfs error: " fmt "\n", __VA_ARGS__)
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#endif
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