AU: Common code to parse simple key/value store files

src/platform/update_engine/simple_key_value_store.cc

Index: src/platform/update_engine/simple_key_value_store.cc
diff --git a/src/platform/update_engine/simple_key_value_store.cc b/src/platform/update_engine/simple_key_value_store.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b4961cb7497dc2db947ec4140d23389ed973d329
--- /dev/null
+++ b/src/platform/update_engine/simple_key_value_store.cc
@@ -0,0 +1,47 @@
+// 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.
+
+#include "update_engine/simple_key_value_store.h"
+#include <map>
+#include <string>
+#include <vector>
+#include "base/string_util.h"
+
+using std::map;
+using std::string;
+using std::vector;
+
+namespace chromeos_update_engine {
+namespace simple_key_value_store {
+
+// Parses a string. 
+map<std::string, std::string> ParseString(const string& str) {
+  // Split along '\n', then along '='
+  std::map<std::string, std::string> ret;
+  vector<string> lines;
+  SplitStringDontTrim(str, '\n', &lines);
+  for (vector<string>::const_iterator it = lines.begin();
+       it != lines.end(); ++it) {
+    string::size_type pos = it->find('=');
+    if (pos == string::npos)
+      continue;
+    ret[it->substr(0, pos)] = it->substr(pos + 1, it->size());

[davidjames, 2010/05/21 21:40:53]

Do you mean just it->substr(pos + 1)?

+  }
+  return ret;
+}
+
+string AssembleString(const std::map<string, string>& data) {
+  string ret;
+  for (std::map<string, string>::const_iterator it = data.begin();
+       it != data.end(); ++it) {
+    ret += it->first;
+    ret += "=";
+    ret += it->second;
+    ret += "\n";
+  }
+  return ret;
+}
+
+}  // namespace simple_key_value_store
+}  // namespace chromeos_update_engine