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      1 /*
      2  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include "webrtc/libjingle/xmpp/xmppstanzaparser.h"
     12 
     13 #include "webrtc/libjingle/xmllite/xmlelement.h"
     14 #include "webrtc/libjingle/xmpp/constants.h"
     15 #include "webrtc/base/common.h"
     16 #ifdef EXPAT_RELATIVE_PATH
     17 #include "expat.h"
     18 #else
     19 #include "third_party/expat/v2_0_1/Source/lib/expat.h"
     20 #endif
     21 
     22 namespace buzz {
     23 
     24 XmppStanzaParser::XmppStanzaParser(XmppStanzaParseHandler *psph) :
     25   psph_(psph),
     26   innerHandler_(this),
     27   parser_(&innerHandler_),
     28   depth_(0),
     29   builder_() {
     30 }
     31 
     32 void
     33 XmppStanzaParser::Reset() {
     34   parser_.Reset();
     35   depth_ = 0;
     36   builder_.Reset();
     37 }
     38 
     39 void
     40 XmppStanzaParser::IncomingStartElement(
     41     XmlParseContext * pctx, const char * name, const char ** atts) {
     42   if (depth_++ == 0) {
     43     XmlElement * pelStream = XmlBuilder::BuildElement(pctx, name, atts);
     44     if (pelStream == NULL) {
     45       pctx->RaiseError(XML_ERROR_SYNTAX);
     46       return;
     47     }
     48     psph_->StartStream(pelStream);
     49     delete pelStream;
     50     return;
     51   }
     52 
     53   builder_.StartElement(pctx, name, atts);
     54 }
     55 
     56 void
     57 XmppStanzaParser::IncomingCharacterData(
     58     XmlParseContext * pctx, const char * text, int len) {
     59   if (depth_ > 1) {
     60     builder_.CharacterData(pctx, text, len);
     61   }
     62 }
     63 
     64 void
     65 XmppStanzaParser::IncomingEndElement(
     66     XmlParseContext * pctx, const char * name) {
     67   if (--depth_ == 0) {
     68     psph_->EndStream();
     69     return;
     70   }
     71 
     72   builder_.EndElement(pctx, name);
     73 
     74   if (depth_ == 1) {
     75     XmlElement *element = builder_.CreateElement();
     76     psph_->Stanza(element);
     77     delete element;
     78   }
     79 }
     80 
     81 void
     82 XmppStanzaParser::IncomingError(
     83     XmlParseContext * pctx, XML_Error errCode) {
     84   RTC_UNUSED(pctx);
     85   RTC_UNUSED(errCode);
     86   psph_->XmlError();
     87 }
     88 
     89 }
     90