blobmsg: implement blobmsg_printf and blobmsg_vprintf

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/blobmsg.h b/blobmsg.h
index c4bf10d..3eeec9b 100644
--- a/blobmsg.h
+++ b/blobmsg.h
@@ -16,6 +16,7 @@
 #ifndef __BLOBMSG_H
 #define __BLOBMSG_H
 
+#include <stdarg.h>
 #include "blob.h"
 
 #define BLOBMSG_ALIGN	2
@@ -195,6 +196,11 @@ void *blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, int ma
 void *blobmsg_realloc_string_buffer(struct blob_buf *buf, int maxlen);
 void blobmsg_add_string_buffer(struct blob_buf *buf);
 
+void blobmsg_vprintf(struct blob_buf *buf, const char *name, const char *format, va_list arg);
+void blobmsg_printf(struct blob_buf *buf, const char *name, const char *format, ...)
+     __attribute__((format(printf, 3, 4)));
+
+
 /* blobmsg to json formatting */
 
 #define blobmsg_for_each_attr(pos, attr, rem) \