X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Futil.c;h=e02f59fb0a0af60d4a71b3c66d297badc86aa924;hb=2c8fcc9cd6a7bbb948f6c79879e89c7ed791c9b1;hp=5e90ecb5093c419432621c0d0b2bb3358ea66967;hpb=aad29cd1a1fb76aa68a9c404a47b66ac516149b5;p=openvswitch

diff --git a/lib/util.c b/lib/util.c
index 5e90ecb5..e02f59fb 100644
--- a/lib/util.c
+++ b/lib/util.c
@@ -696,3 +696,32 @@ ctz(uint32_t n)
 #endif
     }
 }
+
+/* Returns true if the 'n' bytes starting at 'p' are zeros. */
+bool
+is_all_zeros(const uint8_t *p, size_t n)
+{
+    size_t i;
+
+    for (i = 0; i < n; i++) {
+        if (p[i] != 0x00) {
+            return false;
+        }
+    }
+    return true;
+}
+
+/* Returns true if the 'n' bytes starting at 'p' are 0xff. */
+bool
+is_all_ones(const uint8_t *p, size_t n)
+{
+    size_t i;
+
+    for (i = 0; i < n; i++) {
+        if (p[i] != 0xff) {
+            return false;
+        }
+    }
+    return true;
+}
+