Issue Parsing File with YAML-CPP
- by Andrew
In the following code, I'm having some sort of issue getting my .yaml file parsed using parser.GetNextDocument(doc);. After much gross debugging, I've found that the (main) issue here is that my for loop is not running, due to doc.size() == 0; What am I doing wrong?
void
BookView::load()
{
aBook.clear();
QString fileName =
QFileDialog::getOpenFileName(this, tr("Load Address Book"),
"", tr("Address Book (*.yaml);;All Files (*)"));
if(fileName.isEmpty())
{
return;
}
else
{
try
{
std::ifstream fin(fileName.toStdString().c_str());
YAML::Parser parser(fin);
YAML::Node doc;
std::map< std::string, std::string > entry;
parser.GetNextDocument(doc);
std::cout << doc.size();
for( YAML::Iterator it = doc.begin(); it != doc.end(); it++ )
{
*it >> entry;
aBook.push_back(entry);
}
}
catch(YAML::ParserException &e)
{
std::cout << "YAML Exception caught: "
<< e.what()
<< std::endl;
}
}
updateLayout( Navigating );
}
The .yaml file being read was generated using yaml-cpp, so I assume it is correctly formed YAML, but just in case, here's the file anyways.
^@^@^@\230---
-
address: ******************
comment: None.
email: andrew(dot)levenson(at)gmail(dot)com
name: Andrew Levenson
phone: **********^@
Edit: By request, the emitting code:
void
BookView::save()
{
QString fileName =
QFileDialog::getSaveFileName(this, tr("Save Address Book"), "",
tr("Address Book (*.yaml);;All Files (*)"));
if (fileName.isEmpty())
{
return;
}
else
{
QFile file(fileName);
if(!file.open(QIODevice::WriteOnly))
{
QMessageBox::information(this, tr("Unable to open file"),
file.errorString());
return;
}
std::vector< std::map< std::string, std::string > >::iterator itr;
std::map< std::string, std::string >::iterator mItr;
YAML::Emitter yaml;
yaml << YAML::BeginSeq;
for( itr = aBook.begin(); itr < aBook.end(); itr++ )
{
yaml << YAML::BeginMap;
for( mItr = (*itr).begin(); mItr != (*itr).end(); mItr++ )
{
yaml << YAML::Key << (*mItr).first << YAML::Value << (*mItr).second;
}
yaml << YAML::EndMap;
}
yaml << YAML::EndSeq;
QDataStream out(&file);
out.setVersion(QDataStream::Qt_4_5);
out << yaml.c_str();
}
}
