Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/jid.h

Index: webrtc/libjingle/xmpp/jid.h
diff --git a/webrtc/libjingle/xmpp/jid.h b/webrtc/libjingle/xmpp/jid.h
new file mode 100644
index 0000000000000000000000000000000000000000..83e27cc6df0071b4cb9838e58afc0c5194bf017e
--- /dev/null
+++ b/webrtc/libjingle/xmpp/jid.h
@@ -0,0 +1,80 @@
+/*
+ *  Copyright 2004 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_LIBJINGLE_XMPP_JID_H_
+#define WEBRTC_LIBJINGLE_XMPP_JID_H_
+
+#include <string>
+#include "webrtc/libjingle/xmllite/xmlconstants.h"
+
+namespace buzz {
+
+// The Jid class encapsulates and provides parsing help for Jids. A Jid
+// consists of three parts: the node, the domain and the resource, e.g.:
+//
+// node@domain/resource
+//
+// The node and resource are both optional. A valid jid is defined to have
+// a domain. A bare jid is defined to not have a resource and a full jid
+// *does* have a resource.
+class Jid {
+public:
+  explicit Jid();
+  explicit Jid(const std::string& jid_string);
+  explicit Jid(const std::string& node_name,
+               const std::string& domain_name,
+               const std::string& resource_name);
+  ~Jid();
+
+  const std::string & node() const { return node_name_; }
+  const std::string & domain() const { return domain_name_;  }
+  const std::string & resource() const { return resource_name_; }
+
+  std::string Str() const;
+  Jid BareJid() const;
+
+  bool IsEmpty() const;
+  bool IsValid() const;
+  bool IsBare() const;
+  bool IsFull() const;
+
+  bool BareEquals(const Jid& other) const;
+  void CopyFrom(const Jid& jid);
+  bool operator==(const Jid& other) const;
+  bool operator!=(const Jid& other) const { return !operator==(other); }
+
+  bool operator<(const Jid& other) const { return Compare(other) < 0; };
+  bool operator>(const Jid& other) const { return Compare(other) > 0; };
+
+  int Compare(const Jid & other) const;
+
+private:
+  void ValidateOrReset();
+
+  static std::string PrepNode(const std::string& node, bool* valid);
+  static char PrepNodeAscii(char ch, bool* valid);
+  static std::string PrepResource(const std::string& start, bool* valid);
+  static char PrepResourceAscii(char ch, bool* valid);
+  static std::string PrepDomain(const std::string& domain, bool* valid);
+  static void PrepDomain(const std::string& domain,
+                         std::string* buf, bool* valid);
+  static void PrepDomainLabel(
+      std::string::const_iterator start, std::string::const_iterator end,
+      std::string* buf, bool* valid);
+  static char PrepDomainLabelAscii(char ch, bool *valid);
+
+  std::string node_name_;
+  std::string domain_name_;
+  std::string resource_name_;
+};
+
+}
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_JID_H_