Teuchos - Trilinos Tools Package Version of the Day
Teuchos_XMLInputSource.cpp
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00003 //
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
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00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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00009 //
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00011 // modification, are permitted provided that the following conditions are
00012 // met:
00013 //
00014 // 1. Redistributions of source code must retain the above copyright
00015 // notice, this list of conditions and the following disclaimer.
00016 //
00017 // 2. Redistributions in binary form must reproduce the above copyright
00018 // notice, this list of conditions and the following disclaimer in the
00019 // documentation and/or other materials provided with the distribution.
00020 //
00021 // 3. Neither the name of the Corporation nor the names of the
00022 // contributors may be used to endorse or promote products derived from
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00040 // @HEADER
00041 
00042 #include "Teuchos_XMLInputSource.hpp"
00043 #include "Teuchos_TreeBuildingXMLHandler.hpp"
00044 
00045 
00046 #ifdef HAVE_TEUCHOS_EXPAT
00047 #  include "Teuchos_ExpatHandlerAdapter.hpp"
00048 #  define EXPAT_BUFSIZE 8192
00049 #else
00050 #  include "Teuchos_XMLParser.hpp"
00051 #endif
00052 
00053 using namespace Teuchos;
00054 
00055 XMLObject XMLInputSource::getObject() const
00056 {
00057 
00058 #ifdef HAVE_TEUCHOS_EXPAT
00059 
00060   RCP<TreeBuildingXMLHandler> handler = rcp(new TreeBuildingXMLHandler());
00061 
00062   XML_Parser parser = XML_ParserCreate(NULL);
00063 
00064   XML_SetElementHandler(parser, expatStartElementHandler, 
00065                         expatEndElementHandler);
00066 
00067   XML_SetCharacterDataHandler(parser, expatCharacterDataHandler);
00068 
00069   XML_SetUserData(parser, (void*) &(*handler));
00070 
00071   RCP<XMLInputStream> s = stream();
00072 
00073   bool done = false;
00074   unsigned int bufsize = EXPAT_BUFSIZE;
00075   unsigned char buf[EXPAT_BUFSIZE];
00076 
00077   while (!done)
00078     {
00079       unsigned int nRead = s->readBytes(buf, bufsize);
00080       if (nRead < bufsize) 
00081         {
00082           done = true;
00083         }
00084       XML_Parse(parser, (char*) buf, bufsize, done);
00085     }
00086 
00087   return handler->getObject();
00088   
00089 #else
00090 
00091   XMLParser parser(stream());
00092   
00093   return parser.parse();
00094 
00095 #endif
00096 
00097 }
00098       
00099       
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