Vendor dependencies for GCS

vendor/cloud.google.com/go/spanner/util.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package spanner
+
+// maxUint64 returns the maximum of two uint64
+func maxUint64(a, b uint64) uint64 {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+// minUint64 returns the minimum of two uint64
+func minUint64(a, b uint64) uint64 {
+	if a > b {
+		return b
+	}
+	return a
+}