[U-Boot] [PATCH v3 5/9] fs/fat: implement opendir/readdir/closedir

Rob Clark
2017-09-09T17:15:56Z

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Implement the readdir interface using the directory iterators.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
---
fs/fat/fat.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index bbba7947ee..82ddb7eab1 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>
@@ -1146,6 +1147,66 @@ int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
return ret;
}

+typedef struct {
+ struct fs_dir_stream parent;
+ struct fs_dirent dirent;
+ fsdata fsdata;
+ fat_itr itr;
+} fat_dir;
+
+int fat_opendir(const char *filename, struct fs_dir_stream **dirsp)
+{
+ 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;
+
+ *dirsp = (struct fs_dir_stream *)dir;
+ return 0;
+
+fail:
+ free(dir);
+ return ret;
+}
+
+int fat_readdir(struct fs_dir_stream *dirs, struct fs_dirent **dentp)
+{
+ fat_dir *dir = (fat_dir *)dirs;
+ struct fs_dirent *dent = &dir->dirent;
+
+ if (!fat_itr_next(&dir->itr))
+ return -ENOENT;
+
+ memset(dent, 0, sizeof(*dent));
+ 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);
+ }
+
+ *dentp = dent;
+
+ return 0;
+}
+
+void fat_closedir(struct fs_dir_stream *dirs)
+{
+ fat_dir *dir = (fat_dir *)dirs;
+ free(dir);
+}
+
void fat_close(void)
{
}
--
2.13.5