[U-Boot] [PATCH v2 5/8] fs/fat: implement opendir/readdir/closedir

[Rob Clark <robdclark@gmail.com>]

Implement the readdir interface using the directory iterators.

Signed-off-by: Rob Clark <robdclark@gmail.com>
---
 fs/fat/fat.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index a50a10ba47..fe5819315b 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -14,6 +14,7 @@
 #include <config.h>
 #include <exports.h>
 #include <fat.h>
+#include <fs.h>
 #include <asm/byteorder.h>
 #include <part.h>
 #include <malloc.h>
@@ -1119,6 +1120,61 @@ int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
 	return ret;
 }
 
+typedef struct {
+	FS_DIR parent;
+	fsdata fsdata;
+	fat_itr itr;
+} fat_dir;
+
+int fat_opendir(const char *filename, FS_DIR **dirp)
+{
+	fat_dir *dir = malloc(sizeof(*dir));
+	int ret;
+
+	if (!dir)
+		return -ENOMEM;
+
+	ret = fat_itr_root(&dir->itr, &dir->fsdata);
+	if (ret)
+		goto fail;
+
+	ret = fat_itr_resolve(&dir->itr, filename, TYPE_DIR);
+	if (ret)
+		goto fail;
+
+	*dirp = (FS_DIR *)dir;
+	return 0;
+
+fail:
+	free(dir);
+	return ret;
+}
+
+int fat_readdir(FS_DIR *dirp)
+{
+	fat_dir *dir = (fat_dir *)dirp;
+	struct fs_dirent *dent = &dirp->dirent;
+
+	if (!fat_itr_next(&dir->itr))
+		return -ENOENT;
+
+	strcpy(dent->name, dir->itr.name);
+	if (fat_itr_isdir(&dir->itr)) {
+		dent->type = FS_DT_DIR;
+	} else {
+		dent->type = FS_DT_REG;
+		dent->size = FAT2CPU32(dir->itr.dent->size);
+	}
+
+	return 0;
+}
+
+void fat_closedir(FS_DIR *dirp)
+{
+	fat_dir *dir = (fat_dir *)dirp;
+	free(dir);
+}
+
 void fat_close(void)
 {
 }
-- 
2.13.0