bool SimpleAbstractStreamReader::readFile(const QString &fileName)
{
QFile file(fileName);
if (file.open(QIODevice::ReadOnly)) {
QByteArray source = file.readAll();
file.close();
return readFromSource(QString::fromLocal8Bit(source));
}
addError(tr("Cannot find file %1.").arg(fileName));
return false;
}
size_t SeekableFilter::readData(File::Byte* buffer,size_t bufferSize)
{
/* Check if the file position needs to be moved to the read position: */
if(filePos!=readPos)
{
if(readPos>filePos)
{
/* Skip forward in buffer chain from the current position: */
currentPos+=(readPos-filePos);
/* Skip buffers until the current buffer offset is within the current buffer: */
while(currentPos>Offset(current->size))
{
/* Check if there is a next buffer: */
if(current->succ!=0)
{
/* Go to the next buffer: */
currentPos-=current->size;
current=current->succ;
}
else
{
/* Check for end-of-file: */
if(source->eof())
throw SeekError(readPos);
/* Read more data: */
readFromSource();
}
}
}
else
{
/* Skip from the beginning of the buffer chain: */
current=head;
currentPos=readPos;
/* Skip buffers until the current buffer offset is within the current buffer: */
while(currentPos>Offset(current->size))
{
/* Go to the next buffer: */
currentPos-=current->size;
current=current->succ;
}
}
/* Update the file position: */
filePos=readPos;
}
/* Check if the file position is at the end of the read data: */
if(filePos==totalReadSize)
{
/* Check for end-of-file: */
if(source->eof())
return 0;
/* Read more data: */
readFromSource();
}
/* Read from the current file position: */
if(currentPos==Offset(current->size))
{
/* Go to the next buffer: */
current=current->succ;
currentPos=0;
}
size_t copySize=current->size-size_t(currentPos);
setReadBuffer(copySize,reinterpret_cast<Byte*>(current+1)+currentPos,false);
readPos+=copySize;
filePos+=copySize;
currentPos+=copySize;
return copySize;
}
