fs/fat: introduce new director iterators
Untangle directory traversal into a simple iterator, to replace the
existing multi-purpose do_fat_read_at() + get_dentfromdir().
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
diff --git a/include/fat.h b/include/fat.h
index b671ee8..21bb666 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -175,8 +175,15 @@
int data_begin; /* The sector of the first cluster, can be negative */
int fatbufnum; /* Used by get_fatent, init to -1 */
int rootdir_size; /* Size of root dir for non-FAT32 */
+ __u32 root_cluster; /* First cluster of root dir for FAT32 */
} fsdata;
+/* TODO clean up places that are open-coding this: */
+static inline u32 clust_to_sect(fsdata *fsdata, u32 clust)
+{
+ return fsdata->data_begin + clust * fsdata->clust_size;
+}
+
typedef int (file_detectfs_func)(void);
typedef int (file_ls_func)(const char *dir);
typedef int (file_read_func)(const char *filename, void *buffer,