bloblist: add api to get blob with size

bloblist_find function only returns the pointer of blob data,
which is fine for those self-describing data like FDT.
But as a common scenario, an interface is needed to retrieve both
the pointer and the size of the blob data.

Add a few ut test cases for the new api.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/common/bloblist.c b/common/bloblist.c
index 110bb9dc44a..ab48a3cdb98 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -223,13 +223,26 @@ static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size,
 
 void *bloblist_find(uint tag, int size)
 {
+	void *blob = NULL;
+	int blob_size;
+
+	blob = bloblist_get_blob(tag, &blob_size);
+
+	if (size && size != blob_size)
+		return NULL;
+
+	return blob;
+}
+
+void *bloblist_get_blob(uint tag, int *sizep)
+{
 	struct bloblist_rec *rec;
 
 	rec = bloblist_findrec(tag);
 	if (!rec)
 		return NULL;
-	if (size && size != rec->size)
-		return NULL;
+
+	*sizep = rec->size;
 
 	return (void *)rec + rec_hdr_size(rec);
 }