How can I read an xml utf-16 file with QXmlStreamReader?

[SuperHannaR]

I try to find a way to read an xml file that has utf-16 encoding, apparently QIODevice can’t read utf-16 xml files, it says it’s invalid file.
After searching the internet and the t assistant I found that the only library that can set a codec in a file is QTextStream.
Then I found this: QTextCodec.
After searching a bit more on the internet I understood that I need to create an encoding function by myself that should look like this:

QByteArray myEncoderFunc( const QString &xmlfileNameSt );

And call this function like this:

xmlFile.setEncodingFunction ( myEncoderFunc ) ;

With all this information I don’t really know how do I make my file readable for QXmlStreamReader.

Can you help in this?

Thanks,
Hanna

[ChrisW67]

A file is just a stream of bytes to a QIODevice.

This code:

#include <QtCore>
#include <QDebug>
 
int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
 
    QFile in("utf16test.xml");
    in.open(QIODevice::ReadOnly);
    QXmlStreamReader xml(&in);
    while (!xml.atEnd()) {
        xml.readNextStartElement();
        qDebug() << xml.name();
    }
    if (xml.hasError()) {
         // do error handling
    }
 
    return 0;
}

#include <QtCore>
#include <QDebug>

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);

    QFile in("utf16test.xml");
    in.open(QIODevice::ReadOnly);
    QXmlStreamReader xml(&in);
    while (!xml.atEnd()) {
        xml.readNextStartElement();
        qDebug() << xml.name();
    }
    if (xml.hasError()) {
         // do error handling
    }

    return 0;
}

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handles UTF16 encoded XML files just fine here. The reader code includes detection of UTF 16 or 32, BE or LE, with or without BOM, and falls back to UTF-8 based on the first four bytes of the XML file.