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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/xmllite/xmlelement.h"
     29 #include "talk/base/common.h"
     30 #include "talk/xmpp/xmppstanzaparser.h"
     31 #include "talk/xmpp/constants.h"
     32 #ifdef EXPAT_RELATIVE_PATH
     33 #include "lib/expat.h"
     34 #else
     35 #include "third_party/expat/v2_0_1/Source/lib/expat.h"
     36 #endif
     37 
     38 namespace buzz {
     39 
     40 XmppStanzaParser::XmppStanzaParser(XmppStanzaParseHandler *psph) :
     41   psph_(psph),
     42   innerHandler_(this),
     43   parser_(&innerHandler_),
     44   depth_(0),
     45   builder_() {
     46 }
     47 
     48 void
     49 XmppStanzaParser::Reset() {
     50   parser_.Reset();
     51   depth_ = 0;
     52   builder_.Reset();
     53 }
     54 
     55 void
     56 XmppStanzaParser::IncomingStartElement(
     57     XmlParseContext * pctx, const char * name, const char ** atts) {
     58   if (depth_++ == 0) {
     59     XmlElement * pelStream = XmlBuilder::BuildElement(pctx, name, atts);
     60     if (pelStream == NULL) {
     61       pctx->RaiseError(XML_ERROR_SYNTAX);
     62       return;
     63     }
     64     psph_->StartStream(pelStream);
     65     delete pelStream;
     66     return;
     67   }
     68 
     69   builder_.StartElement(pctx, name, atts);
     70 }
     71 
     72 void
     73 XmppStanzaParser::IncomingCharacterData(
     74     XmlParseContext * pctx, const char * text, int len) {
     75   if (depth_ > 1) {
     76     builder_.CharacterData(pctx, text, len);
     77   }
     78 }
     79 
     80 void
     81 XmppStanzaParser::IncomingEndElement(
     82     XmlParseContext * pctx, const char * name) {
     83   if (--depth_ == 0) {
     84     psph_->EndStream();
     85     return;
     86   }
     87 
     88   builder_.EndElement(pctx, name);
     89 
     90   if (depth_ == 1) {
     91     XmlElement *element = builder_.CreateElement();
     92     psph_->Stanza(element);
     93     delete element;
     94   }
     95 }
     96 
     97 void
     98 XmppStanzaParser::IncomingError(
     99     XmlParseContext * pctx, XML_Error errCode) {
    100   UNUSED(pctx);
    101   UNUSED(errCode);
    102   psph_->XmlError();
    103 }
    104 
    105 }
    106