Teuchos_XMLInputSource.cpp

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00001 // @HEADER
00002 // ***********************************************************************
00003 // 
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 #include "Teuchos_XMLInputSource.hpp"
00030 #include "Teuchos_TreeBuildingXMLHandler.hpp"
00031 
00032 
00033 #ifdef HAVE_TEUCHOS_EXPAT
00034 #include "Teuchos_ExpatHandlerAdapter.hpp"
00035 #define EXPAT_BUFSIZE 8192
00036 #endif
00037 
00038 #ifdef HAVE_TEUCHOS_LIBXML2
00039 #include <libxml/parser.h>
00040 #endif
00041 
00042 using namespace Teuchos;
00043 
00044 XMLObject XMLInputSource::getObject() const
00045 {
00046 #ifdef HAVE_TEUCHOS_EXPAT
00047 
00048   RefCountPtr<TreeBuildingXMLHandler> handler = rcp(new TreeBuildingXMLHandler());
00049 
00050   XML_Parser parser = XML_ParserCreate(NULL);
00051 
00052   XML_SetElementHandler(parser, expatStartElementHandler, 
00053                         expatEndElementHandler);
00054 
00055   XML_SetCharacterDataHandler(parser, expatCharacterDataHandler);
00056 
00057   XML_SetUserData(parser, (void*) &(*handler));
00058 
00059   RefCountPtr<XMLInputStream> s = stream();
00060 
00061   bool done = false;
00062   unsigned int bufsize = EXPAT_BUFSIZE;
00063   unsigned char buf[EXPAT_BUFSIZE];
00064 
00065   while (!done)
00066     {
00067       unsigned int nRead = s->readBytes(buf, bufsize);
00068       if (nRead < bufsize) 
00069         {
00070           done = true;
00071         }
00072       XML_Parse(parser, (char*) buf, bufsize, done);
00073     }
00074 
00075   return handler->getObject();
00076 
00077   
00078 #else
00079 
00080   TEST_FOR_EXCEPTION(true, logic_error, "XMLInputSource::getObject() - no XML parser installed");
00081   return XMLObject(); // -Wall
00082 #endif
00083 
00084 }
00085       
00086       

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