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

webrtc/libjingle/xmllite/xmlparser.h

Index: webrtc/libjingle/xmllite/xmlparser.h
diff --git a/webrtc/libjingle/xmllite/xmlparser.h b/webrtc/libjingle/xmllite/xmlparser.h
new file mode 100644
index 0000000000000000000000000000000000000000..131c585e4da1748fe79fa9486cbd45d773ab9af5
--- /dev/null
+++ b/webrtc/libjingle/xmllite/xmlparser.h
@@ -0,0 +1,103 @@
+/*
+ *  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_XMLLITE_XMLPARSER_H_
+#define WEBRTC_LIBJINGLE_XMLLITE_XMLPARSER_H_
+
+#include <string>
+
+#include "webrtc/libjingle/xmllite/xmlnsstack.h"
+#ifdef EXPAT_RELATIVE_PATH
+#include "expat.h"
+#else
+#include "third_party/expat/v2_0_1/Source/lib/expat.h"
+#endif  // EXPAT_RELATIVE_PATH
+
+struct XML_ParserStruct;
+typedef struct XML_ParserStruct* XML_Parser;
+
+namespace buzz {
+
+class XmlParseHandler;
+class XmlParseContext;
+class XmlParser;
+
+class XmlParseContext {
+public:
+  virtual ~XmlParseContext() {}
+  virtual QName ResolveQName(const char * qname, bool isAttr) = 0;
+  virtual void RaiseError(XML_Error err) = 0;
+  virtual void GetPosition(unsigned long * line, unsigned long * column,
+                           unsigned long * byte_index) = 0;
+};
+
+class XmlParseHandler {
+public:
+  virtual ~XmlParseHandler() {}
+  virtual void StartElement(XmlParseContext * pctx,
+               const char * name, const char ** atts) = 0;
+  virtual void EndElement(XmlParseContext * pctx,
+               const char * name) = 0;
+  virtual void CharacterData(XmlParseContext * pctx,
+               const char * text, int len) = 0;
+  virtual void Error(XmlParseContext * pctx,
+               XML_Error errorCode) = 0;
+};
+
+class XmlParser {
+public:
+  static void ParseXml(XmlParseHandler * pxph, std::string text);
+
+  explicit XmlParser(XmlParseHandler * pxph);
+  bool Parse(const char * data, size_t len, bool isFinal);
+  void Reset();
+  virtual ~XmlParser();
+
+  // expat callbacks
+  void ExpatStartElement(const char * name, const char ** atts);
+  void ExpatEndElement(const char * name);
+  void ExpatCharacterData(const char * text, int len);
+  void ExpatXmlDecl(const char * ver, const char * enc, int standalone);
+
+private:
+
+  class ParseContext : public XmlParseContext {
+  public:
+    ParseContext();
+    virtual ~ParseContext();
+    virtual QName ResolveQName(const char * qname, bool isAttr);
+    virtual void RaiseError(XML_Error err) { if (!raised_) raised_ = err; }
+    virtual void GetPosition(unsigned long * line, unsigned long * column,
+                             unsigned long * byte_index);
+    XML_Error RaisedError() { return raised_; }
+    void Reset();
+
+    void StartElement();
+    void EndElement();
+    void StartNamespace(const char * prefix, const char * ns);
+    void SetPosition(int line, int column, long byte_index);
+
+  private:
+    XmlnsStack xmlnsstack_;
+    XML_Error raised_;
+    XML_Size line_number_;
+    XML_Size column_number_;
+    XML_Index byte_index_;
+  };
+
+  ParseContext context_;
+  XML_Parser expat_;
+  XmlParseHandler * pxph_;
+  bool sentError_;
+};
+
+}  // namespace buzz
+
+#endif  // WEBRTC_LIBJINGLE_XMLLITE_XMLPARSER_H_