[PATCH v3 2/6] bloblist: add helper functions

[Raymond Mao]

Add two helper functions for:
1. marking a blob void
2. getting blob record from a given blob data pointer.

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
Changes in v2:
- None.
Changes in v3:
- None.

 common/bloblist.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/common/bloblist.c b/common/bloblist.c
index 1c690f58b56..488908f605e 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -97,6 +97,19 @@ static inline uint rec_tag(struct bloblist_rec *rec)
 		BLOBLISTR_TAG_SHIFT;
 }
 
+static inline void void_blob(struct bloblist_rec *rec)
+{
+	if (rec_tag(rec) == BLOBLISTT_VOID)
+		return;
+	rec->tag_and_hdr_size = BLOBLISTT_VOID |
+				sizeof(*rec) << BLOBLISTR_HDR_SIZE_SHIFT;
+}
+
+static inline struct bloblist_rec *rec_from_blob(void *blob)
+{
+	return (blob - sizeof(struct bloblist_rec));
+}
+
 static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr,
 				   struct bloblist_rec *rec)
 {
-- 
2.25.1