diff --git a/util.h b/util.h
index 2deb3533..6545aa40 100644
--- a/util.h
+++ b/util.h
@@ -94,6 +94,24 @@ void pathprint(char* str, size_t size, const char* format, ...);
  */
 void pathslash(char* str, size_t size);
 
+/****************************************************************************/
+/* bit */
+
+static inline int bit_has(unsigned bit, unsigned mask)
+{
+	return (bit & mask) == mask;
+}
+
+static inline unsigned bit_set(unsigned bit, unsigned mask)
+{
+	return bit | mask;
+}
+
+static inline unsigned bit_clear(unsigned bit, unsigned mask)
+{
+	return bit & ~mask;
+}
+
 /****************************************************************************/
 /* memory */