1 files changed, 9 insertions, 0 deletions

diff --git a/tools/lib/string.c b/tools/lib/string.c
index bd239bc1d557..8e678af1c6ee 100644
--- a/tools/lib/string.c
+++ b/tools/lib/string.c
@@ -87,3 +87,12 @@ size_t __weak strlcpy(char *dest, const char *src, size_t size)
         }
         return ret;
 }
+
+int prefixcmp(const char *str, const char *prefix)
+{
+        for (; ; str++, prefix++)
+                if (!*prefix)
+                        return 0;
+                else if (*str != *prefix)
+                        return (unsigned char)*prefix - (unsigned char)*str;
+}