1 files changed, 6 insertions, 0 deletions
diff --git a/include/util.h b/include/util.h
index 21603484bb..4ed352f0d7 100644
--- a/include/util.h
+++ b/include/util.h
@@ -124,6 +124,12 @@ void *memchr(const void *buffer, int c, size_t n);
  */
 char *strstr(const char *s1, const char *s2);
 
+/**
+ * Calculates the length of the initial segment of s which consists
+ * entirely of bytes not in reject.
+ */
+size_t strcspn(const char *s, const char *reject);
+
 size_t strlen(const char *s);
 char *strncpy(char *dest, const char *src, size_t n);
 int strncmp(const char *s1, const char *s2, size_t n);