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Teuchos_XMLParameterListHelpers.cpp
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00004 //                    Teuchos: Common Tools Package
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00041 
00042 
00043 #include "Teuchos_XMLParameterListHelpers.hpp"
00044 #include "Teuchos_FileInputSource.hpp"
00045 #include "Teuchos_XMLParameterListReader.hpp"
00046 #include "Teuchos_CommHelpers.hpp"
00047 
00048 
00049 void Teuchos::updateParametersFromXmlFileAndBroadcast(
00050   const std::string &xmlFileName,
00051   const Ptr<ParameterList> &paramList,
00052   const Comm<int> &comm
00053   )
00054 {
00055   if (comm.getSize()==1)
00056     updateParametersFromXmlFile(xmlFileName, paramList);
00057   else {
00058     if (comm.getRank()==0) {
00059       XMLParameterListReader xmlPLReader;
00060       xmlPLReader.setAllowsDuplicateSublists( false );
00061       FileInputSource xmlFile(xmlFileName);
00062       XMLObject xmlParams = xmlFile.getObject();
00063       std::string xmlString = toString(xmlParams);
00064       int strsize = xmlString.size();
00065       broadcast<int, int>(comm, 0, &strsize);
00066       broadcast<int, char>(comm, 0, strsize, &xmlString[0]);
00067       updateParametersFromXmlString(xmlString, paramList);
00068     }
00069     else {
00070       int strsize;
00071       broadcast<int, int>(comm, 0, &strsize);
00072       std::string xmlString;
00073       xmlString.resize(strsize);
00074       broadcast<int, char>(comm, 0, strsize, &xmlString[0]);
00075       updateParametersFromXmlString(xmlString, paramList);
00076     }
00077   }
00078 }
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