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Merge pull request #5503 from infinnovation/rewinddir 

FATFileSystem: provide working dir_rewind and dir_seek
pull/5539/head
Jimmy Brisson 2017-11-20 10:52:05 -06:00 committed by GitHub
parent 08f3402b7c 452e290821
commit ac891af2b2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 2 deletions
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21
features/filesystem/fat/FATFileSystem.cpp
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@ -660,7 +660,24 @@ void FATFileSystem::dir_seek(fs_dir_t dir, off_t offset) {
FATFS_DIR *dh = static_cast<FATFS_DIR*>(dir);
lock();
dh->index = offset;
if (offset < dh->index) {
f_rewinddir(dh);
}
while (dh->index < offset) {
FILINFO finfo;
FRESULT res;
#if _USE_LFN
char lfname[NAME_MAX];
finfo.lfname = lfname;
finfo.lfsize = NAME_MAX;
#endif // _USE_LFN
res = f_readdir(dh, &finfo);
if (res != FR_OK) {
break;
} else if (finfo.fname[0] == 0) {
break;
}
}
unlock();
}
@ -678,7 +695,7 @@ void FATFileSystem::dir_rewind(fs_dir_t dir) {
FATFS_DIR *dh = static_cast<FATFS_DIR*>(dir);
lock();
dh->index = 0;
f_rewinddir(dh);
unlock();
}