X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/c38e3ce98599a410a47dc10253faa4d5830f13b2..427c49bcad63d042b29ada2ac27e3dfc4845c779:/utilities/src/comparison.c?ds=sidebyside

diff --git a/utilities/src/comparison.c b/utilities/src/comparison.c
new file mode 100644
index 00000000..d0d287df
--- /dev/null
+++ b/utilities/src/comparison.c
@@ -0,0 +1,19 @@
+//
+//  comparison.c
+//  utilities
+//
+//  Created by Keith Henrickson on 7/1/12.
+//  Copyright (c) 2012 Apple Inc. All rights reserved.
+//
+
+#include <stdio.h>
+#include <stdint.h>
+#include "comparison.h"
+
+uint64_t constant_memcmp(const uint8_t *first, const uint8_t *second, size_t count) {
+    uint64_t error_counter = 0;
+    for (size_t counter = 0; counter < count; counter++) {
+        error_counter |= first[counter] ^ second[counter];
+    }
+    return error_counter;
+}