readBlockFrom

virtual FXuval FX::QIODevice::readBlockFrom ( char *  data, FXuval  maxlen, FXfval  pos   ) [pure virtual] Combines an at() and readBlock() together. Can be much more efficient than those two operations individually with some i/o devices, plus it's synchronous and thus threadsafe Implemented in FX::QBuffer, FX::QBZip2Device, FX::QFile, FX::QGZipDevice, FX::QIODeviceS, FX::QMemMap, and FX::QSSLDevice.

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(C) 2002-2009 Niall Douglas. Some parts (C) to assorted authors.