Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/optionsfile.h

@@ -0,0 +1,49 @@
+/*
+ *  Copyright 2008 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_BASE_OPTIONSFILE_H_
+#define WEBRTC_BASE_OPTIONSFILE_H_
+
+#include <map>
+#include <string>
+
+namespace rtc {
+
+// Implements storage of simple options in a text file on disk. This is
+// cross-platform, but it is intended mostly for Linux where there is no
+// first-class options storage system.
+class OptionsFile {
+ public:
+  OptionsFile(const std::string &path);
+
+  // Loads the file from disk, overwriting the in-memory values.
+  bool Load();
+  // Saves the contents in memory, overwriting the on-disk values.
+  bool Save();
+
+  bool GetStringValue(const std::string& option, std::string* out_val) const;
+  bool GetIntValue(const std::string& option, int* out_val) const;
+  bool SetStringValue(const std::string& option, const std::string& val);
+  bool SetIntValue(const std::string& option, int val);
+  bool RemoveValue(const std::string& option);
+
+ private:
+  typedef std::map<std::string, std::string> OptionsMap;
+
+  static bool IsLegalName(const std::string &name);
+  static bool IsLegalValue(const std::string &value);
+
+  std::string path_;
+  OptionsMap options_;
+};
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_OPTIONSFILE_H_