AU: Common code to parse simple key/value store files
We use a few files, like /etc/lsb-release, that have a simple
key/value store format: each line is a key/value pair and the
key/value are separated by '='. This change make some common code to
parse (and assemble) these files, which is used in one place now but
will be used in another place soon, too.
BUG=None
TEST=attached unittests
Review URL: http://codereview.chromium.org/2105016
diff --git a/simple_key_value_store.h b/simple_key_value_store.h
new file mode 100644
index 0000000..6453eee
--- /dev/null
+++ b/simple_key_value_store.h
@@ -0,0 +1,26 @@
+// Copyright (c) 2010 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.
+
+// These functions can parse a blob of data that's formatted as a simple
+// key value store. Each key/value pair is stored on its own line and
+// separated by the first '=' on the line.
+
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_SIMPLE_KEY_VALUE_STORE_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_SIMPLE_KEY_VALUE_STORE_H__
+
+#include <map>
+#include <string>
+
+namespace chromeos_update_engine {
+namespace simple_key_value_store {
+
+// Parses a string.
+std::map<std::string, std::string> ParseString(const std::string& str);
+
+std::string AssembleString(const std::map<std::string, std::string>& data);
+
+} // namespace simple_key_value_store
+} // namespace chromeos_update_engine
+
+#endif // CHROMEOS_PLATFORM_UPDATE_ENGINE_SIMPLE_KEY_VALUE_STORE_H__