[Interest] [SOLVED] Binary file embedded in Resources to std::istream
thiago.macieira at intel.com
Mon Aug 5 21:25:13 CEST 2013
On segunda-feira, 5 de agosto de 2013 21:08:45, Rollastre Prostrit wrote:
> QByteArray bytes = f.readAll();
> char* bb = bytes.data();
> std::string str;
> for (int i=0; i<f.size(); ++i)
> str += bb[i];
> std::stringstream stream;
> stream << str;
That seems wrong or, at least, weird. You're appending byte-by-byte from the
file into the string. That can't be fast...
Doesn't std::string have a method that lets you set a full array of bytes
(pointer and size)? Or, for that matter, doesn't stringstream have it? I
confess I don't know: the lack of such convenience API is what keeps me from
using the Standard Library.
Another alternative is for you to derive from std::istream and create your own
QFile-based stream. Or a QByteArray-based one, to match std::stringstream.
At the very least, to make it more efficient, you should try to use
QFile::map(). For uncompressed resources, this will save you a memory
allocation into the QByteArray.
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
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