util/blob: Add overwrite function for uint8

Overwrite function for this type  was missing and I needed it for my project.

Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Karol Herbst <[email protected]>
Signed-off-by: Mark Menzynski <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3903>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/util/blob.h b/src/util/blob.h
index 9113331254a..e1e156eb43f 100644
--- a/src/util/blob.h
+++ b/src/util/blob.h
@@ -184,6 +184,21 @@ bool
 blob_write_uint8(struct blob *blob, uint8_t value);
 
 /**
+ * Overwrite a uint8_t previously written to the blob.
+ *
+ * Writes a uint8_t value to an existing portion of the blob at an offset of
+ * \offset.  This data range must have previously been written to the blob by
+ * one of the blob_write_* calls.
+ *
+ * \return True unless the requested position or position+to_write lie outside
+ * the current blob's size.
+ */
+bool
+blob_overwrite_uint8(struct blob *blob,
+                     size_t offset,
+                     uint8_t value);
+
+/**
  * Add a uint16_t to a blob.
  *
  * \note This function will only write to a uint16_t-aligned offset from the