Il 09/11/2017 10:15, Nikos Chantziaras ha scritto:
This saves an allocation, a copy and a free since I don't have to use QString::toWCharArray(). However, is this actually safe? "It seems to work," and AFAIK, QString::d->data() is already in the format and encoding Windows excepts a wchar_t* to be. Is this correct?
It is safe. QString is UTF-16 encoded (same code unit size as for wchar_t on Windows), and Windows APIs accepting wchar_t expect a NUL-terminated UTF-16 string as a wchar_t*, which is exactly what utf16() provides.
See also various of such usages into Qt itself, e.g.
https://code.woboq.org/qt5/qtbase/src/corelib/io/qfilesystemengine_win.cpp.html#387
Cheers, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (UK) Ltd., a KDAB Group company | Tel: UK +44-1625-809908 KDAB - Qt, C++ and OpenGL Experts
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