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PersistentOStream.cc
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PersistentOStream.cc
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// -*- C++ -*-
//
// PersistentOStream.cc is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the PersistentOStream class.
//
#include "PersistentOStream.h"
#include "ThePEG/Utilities/DynamicLoader.h"
#include <fstream>
// #include <pfstream.h>
namespace ThePEG {
PersistentOStream::PersistentOStream(ostream & os)
: theOStream(&os), badState(false), allocStream(false) {
init();
}
PersistentOStream::PersistentOStream(string file)
: badState(false), allocStream(true) {
// if ( file[0] == '|' )
// theOStream = new opfstream(file.substr(1).c_str());
// else if ( file.substr(file.length()-3, file.length()) == ".gz" )
// theOStream = new opfstream(string("gzip > " + file).c_str());
// else
theOStream = new ofstream(file.c_str());
if ( theOStream )
init();
else
setBadState();
}
void PersistentOStream::init() {
operator<<(string("ThePEG version 1 Database"));
operator<<(version);
operator<<(subVersion);
*this << DynamicLoader::appendedPaths();
*this << DynamicLoader::prependedPaths();
}
PersistentOStream::~PersistentOStream() {
if ( allocStream ) delete theOStream;
}
void PersistentOStream::
putObjectPart(tcBPtr obj, const ClassDescriptionBase * db) {
ClassDescriptionBase::DescriptionVector::const_iterator bit =
db->descriptions().begin();
while ( bit != db->descriptions().end() ) {
putObjectPart(obj, *bit++);
endBase();
}
db->output(obj, *this);
}
PersistentOStream &
PersistentOStream::outputPointer(tcBPtr obj) {
if ( !good() ) return *this;
if ( !obj ) return operator<<(0);
// It it's the null pointer, just print a zero.
try {
// Check if the object has been written before. In that case just write
// out it's number
ObjectMap::const_iterator oit = writtenObjects.find(obj);
if ( oit != writtenObjects.end() ) {
*this << oit->second;
return *this;
}
// This object hasn't been written before so we write it out, beginning
// with a number, then the class information, and finally let it write
// itself on the stream.
beginObject();
int oid = writtenObjects.size()+1;
writtenObjects[obj] = oid;
*this << oid;
const ClassDescriptionBase * desc = writeClassId(obj);
putObjectPart(obj, desc);
endObject();
}
catch (...) {
setBadState();
}
checkState();
return *this;
}
const ClassDescriptionBase *
PersistentOStream::writeClassId(tcBPtr obj) {
const ClassDescriptionBase * db = DescriptionList::find(typeid(*obj));
if ( !db ) {
throw MissingClass()
<< "PersistentOStream could not find the ClassDescription object "
<< "corresponding to the class " << typeid(*obj).name()
<< ". Please chack that the class has a properly instantiated "
<< "ClassDescription object." << Exception::runerror;
}
writeClassDescription(db);
return db;
}
void PersistentOStream::
writeClassDescription(const ClassDescriptionBase * db) {
// If objects of this class has been written out before, just write
// the corresponding number
ClassMap::iterator cit = writtenClasses.find(db);
if ( cit != writtenClasses.end() ) {
operator<<(cit->second);
return;
}
// This class hasn't been written before, so append it to the list of
// written classes and assign a number to it, before writing the string
// containing the information
int cid = writtenClasses.size();
writtenClasses[db] = cid;
operator<<(cid);
operator<<(db->name());
operator<<(db->version());
operator<<(DynamicLoader::dlnameversion(db->library()));
// Now write its base classes or a zero if the base class is PersistentBase.
operator<<(db->descriptions().size());
DescriptionVector::const_iterator bit = db->descriptions().begin();
while ( bit != db->descriptions().end() ) writeClassDescription(*bit++);
}
}

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