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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+// emulates google3/file/base/file.h
+
+#ifndef GOOGLE_PROTOBUF_TESTING_FILE_H__
+#define GOOGLE_PROTOBUF_TESTING_FILE_H__
+
+#include <google/protobuf/stubs/common.h>
+
+namespace google {
+namespace protobuf {
+
+const int DEFAULT_FILE_MODE = 0777;
+
+// Protocol buffer code only uses a couple static methods of File, and only
+// in tests.
+class File {
+ public:
+  // Check if the file exists.
+  static bool Exists(const string& name);
+
+  // Read an entire file to a string.  Return true if successful, false
+  // otherwise.
+  static bool ReadFileToString(const string& name, string* output);
+
+  // Same as above, but crash on failure.
+  static void ReadFileToStringOrDie(const string& name, string* output);
+
+  // Create a file and write a string to it.
+  static void WriteStringToFileOrDie(const string& contents,
+                                     const string& name);
+
+  // Create a directory.
+  static bool CreateDir(const string& name, int mode);
+
+  // Create a directory and all parent directories if necessary.
+  static bool RecursivelyCreateDir(const string& path, int mode);
+
+  // If "name" is a file, we delete it.  If it is a directory, we
+  // call DeleteRecursively() for each file or directory (other than
+  // dot and double-dot) within it, and then delete the directory itself.
+  // The "dummy" parameters have a meaning in the original version of this
+  // method but they are not used anywhere in protocol buffers.
+  static void DeleteRecursively(const string& name,
+                                void* dummy1, void* dummy2);
+
+ private:
+  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(File);
+};
+
+}  // namespace protobuf
+}  // namespace google
+
+#endif  // GOOGLE_PROTOBUF_TESTING_FILE_H__