asked on

QString to TCHAR in QT

Hello,
how I can copy a QString to a TCHAR value of a componet (Dll)?
In VC++ I used:

_tcsncpy(info.DeveloperID, m_strDeveloperID, 24*sizeof(TCHAR));
//info.DeveloperID = TCHAR

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How it look in QT if m_strDeveloperID is a QString?

jkr

This is quite similar to your 'TCHAT' issue, with the problem being that QString has 'std::string toStdString() const' and 'std::wstring toStdWString() const' as its members for this task. So, you either you need to provide cenvenience wrappers similar to 'tchat.h' or compile it conditionally like

#ifdef _UNICODE
_tcsncpy(info.DeveloperID, m_strDeveloperID.toStdWString().c_str(), 24*sizeof(TCHAR));
#else
_tcsncpy(info.DeveloperID, m_strDeveloperID.toStdString().c_str(), 24*sizeof(TCHAR));
#endif

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jkr

Ooops, alsmost forgot - the convenience wrapper could just be

TCHAR* QStringToTCHAR(const QString& qs) {
#ifdef _UNICODE
  return qs.toStdWString().c_str();
#else
  return qs.toStdString().c_str();
#endif
}

// ...

_tcsncpy(info.DeveloperID, QStringToTCHAR(m_strDeveloperID), 24*sizeof(TCHAR));

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jkr

And, last but not least: see the docs at http://doc.qt.io/qt-5/qstring.html

Ingo Foerster

ASKER

so _tcsncpy is allowed in QT and works on all platforms like Linux, Mac and Windows?

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jkr

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Ingo Foerster

ASKER

Great and high professional help. Many thanks to jkr.