mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 00:32:38 +01:00
3b9d6630c8
After quite a bit of prototyping, settled on the following functions: - lfs_dir_alloc - create a new dir - lfs_dir_fetch - load and check a dir pair from disk - lfs_dir_commit - save a dir pair to disk - lfs_dir_shift - shrink a dir pair to disk - lfs_dir_append - add a dir entry, creating dirs if needed - lfs_dir_remove - remove a dir entry, dropping dirs if needed Additionally, followed through with a few other tweaks
39 lines
707 B
C
39 lines
707 B
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 MIT 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 "lfs_config.h"
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// Builtin functions
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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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uint32_t lfs_crc(uint32_t crc, lfs_size_t size, const void *buffer);
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#endif
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