1 files changed, 30 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/rand_util.cc b/ipc/chromium/src/base/rand_util.cc
new file mode 100644
index 0000000000..bf14baa5d4
--- /dev/null
+++ b/ipc/chromium/src/base/rand_util.cc
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/rand_util.h"
+
+#include <math.h>
+
+#include <limits>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "mozilla/RandomNum.h"
+
+namespace base {
+
+int RandInt(int min, int max) {
+  DCHECK(min <= max);
+
+  uint64_t range = static_cast<int64_t>(max) - min + 1;
+  mozilla::Maybe<uint64_t> number = mozilla::RandomUint64();
+  MOZ_RELEASE_ASSERT(number.isSome());
+  int result = min + static_cast<int>(number.value() % range);
+  DCHECK(result >= min && result <= max);
+  return result;
+}
+
+}  // namespace base