chromeos: Separate XML parsing code from IntrospectableClient

chrome/browser/chromeos/dbus/introspect_util.cc

Index: chrome/browser/chromeos/dbus/introspect_util.cc
diff --git a/chrome/browser/chromeos/dbus/introspect_util.cc b/chrome/browser/chromeos/dbus/introspect_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6b7dc5fa5de09cb61ceccc8b454bd1f13738f573
--- /dev/null
+++ b/chrome/browser/chromeos/dbus/introspect_util.cc
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 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 "chrome/browser/chromeos/dbus/introspect_util.h"
+
+#include "chrome/common/libxml_utils.h"
+
+namespace {
+
+// String constants used for parsing D-Bus Introspection XML data.
+const char kInterfaceNode[] = "interface";
+const char kInterfaceNameAttribute[] = "name";
+
+}
+
+namespace chromeos {
+
+std::vector<std::string> GetInterfacesFromIntrospectResult(
+    const std::string& xml_data) {
+  std::vector<std::string> interfaces;
+
+  XmlReader reader;
+  if (!reader.Load(xml_data))
+    return interfaces;
+
+  do {
+    // Skip to the next open tag, exit when done.
+    while (!reader.SkipToElement()) {
+      if (!reader.Read()) {
+        return interfaces;
+      }
+    }
+
+    // Only look at interface nodes.
+    if (reader.NodeName() != kInterfaceNode)
+      continue;
+
+    // Skip if missing the interface name.
+    std::string interface_name;
+    if (!reader.NodeAttribute(kInterfaceNameAttribute, &interface_name))
+      continue;
+
+    interfaces.push_back(interface_name);
+  } while (reader.Read());
+
+  return interfaces;
+}
+
+}