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Added file config structure and lfs_file_opencfg

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The optional config structure options up the possibility of adding
file-level configuration in a backwards compatible manner.

Also bumped minor version to v1.5
This commit is contained in:
Christopher Haster
2018-07-05 17:42:57 -05:00
parent 97711d78c4
commit f6e3193051
2 changed files with 41 additions and 12 deletions
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17
lfs.c
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@@ -1282,8 +1282,9 @@ static int lfs_ctz_traverse(lfs_t *lfs,
/// Top level file operations ///
int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags, void *file_buffer) {
int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags,
const struct lfs_file_config *cfg) {
// deorphan if we haven't yet, needed at most once after poweron
if ((flags & 3) != LFS_O_RDONLY && !lfs->deorphaned) {
int err = lfs_deorphan(lfs);
@@ -1323,6 +1324,7 @@ int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
}
// setup file struct
file->cfg = cfg;
file->pair[0] = cwd.pair[0];
file->pair[1] = cwd.pair[1];
file->poff = entry.off;
@@ -1341,8 +1343,8 @@ int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
// allocate buffer if needed
file->cache.block = 0xffffffff;
if (file_buffer) {
file->cache.buffer = file_buffer;
if (file->cfg && file->cfg->buffer) {
file->cache.buffer = file->cfg->buffer;
} else if (lfs->cfg->file_buffer) {
if (lfs->files) {
// already in use
@@ -1371,6 +1373,11 @@ int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
return 0;
}
int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags) {
return lfs_file_opencfg(lfs, file, path, flags, NULL);
}
int lfs_file_close(lfs_t *lfs, lfs_file_t *file) {
int err = lfs_file_sync(lfs, file);
@@ -1383,7 +1390,7 @@ int lfs_file_close(lfs_t *lfs, lfs_file_t *file) {
}
// clean up memory
if (!lfs->cfg->file_buffer) {
if (!(file->cfg && file->cfg->buffer) && !lfs->cfg->file_buffer) {
lfs_free(file->cache.buffer);
}