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diff --git a/src/main/cpp/util/file.h b/src/main/cpp/util/file.h
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+++ b/src/main/cpp/util/file.h
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+// Copyright 2014 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.
+#ifndef DEVTOOLS_BLAZE_MAIN_UTIL_FILE_H_
+#define DEVTOOLS_BLAZE_MAIN_UTIL_FILE_H_
+
+#include <string>
+
+namespace blaze_util {
+
+using std::string;
+
+// Returns the part of the path before the final "/".  If there is a single
+// leading "/" in the path, the result will be the leading "/".  If there is
+// no "/" in the path, the result is the empty prefix of the input (i.e., "").
+string Dirname(const string &path);
+
+// Returns the part of the path after the final "/".  If there is no
+// "/" in the path, the result is the same as the input.
+string Basename(const string &path);
+
+string JoinPath(const string &path1, const string &path2);
+
+// Checks each element of the PATH variable for executable. If none is found, ""
+// is returned.  Otherwise, the full path to executable is returned. Can die if
+// looking up PATH fails.
+string Which(const string &executable);
+
+}  // namespace blaze_util
+
+#endif  // DEVTOOLS_BLAZE_MAIN_UTIL_FILE_H_