libuuid: simplify uuid_is_null() check

There is no need to check uuid byte by byte.  Also by using size of the uuid
type magic constant can be avoided.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/libuuid/src/isnull.c b/libuuid/src/isnull.c
index 931e7e7dba2b30f801abbf045a0a763f8296fbf2..ecb44eac69a5239bea1ff325e92b353884ae91fe 100644 (file)
--- a/libuuid/src/isnull.c
+++ b/libuuid/src/isnull.c
@@ -33,16 +33,12 @@
  */
 
 #include "uuidP.h"
+#include <string.h>
 
 /* Returns 1 if the uuid is the NULL uuid */
 int uuid_is_null(const uuid_t uu)
 {
-       const unsigned char     *cp;
-       int                     i;
+       const uuid_t nil = { 0 };
 
-       for (i=0, cp = uu; i < 16; i++)
-               if (*cp++)
-                       return 0;
-       return 1;
+       return !memcmp(uu, nil, sizeof(nil));
 }
-