1 files changed, 6 insertions, 0 deletions
diff --git a/src/buffer.h b/src/buffer.h
index f9696e0..babd051 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -3,6 +3,7 @@
 
 #include <stddef.h>
 #include <stdarg.h>
+#include <string.h>
 #include <limits.h>
 #include "config.h"
 
@@ -82,6 +83,11 @@ cmark_strbuf_check_bufsize(size_t size) {
 	return (bufsize_t)size;
 }
 
+static inline bufsize_t
+cmark_strbuf_safe_strlen(const char *str) {
+	return cmark_strbuf_check_bufsize(strlen(str));
+}
+
 #ifdef __cplusplus
 }
 #endif