KGzipFilter::Result KGzipFilter::uncompress_()
{
#ifndef NDEBUG
if (d->mode == 0) {
//qWarning() << "mode==0; KGzipFilter::init was not called!";
return KFilterBase::Error;
} else if (d->mode == QIODevice::WriteOnly) {
//qWarning() << "uncompress called but the filter was opened for writing!";
return KFilterBase::Error;
}
Q_ASSERT(d->mode == QIODevice::ReadOnly);
#endif
if (d->compressed) {
#ifdef DEBUG_GZIP
qDebug() << "Calling inflate with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
qDebug() << " next_in=" << d->zStream.next_in;
#endif
int result = inflate(&d->zStream, Z_SYNC_FLUSH);
#ifdef DEBUG_GZIP
qDebug() << " -> inflate returned " << result;
qDebug() << " now avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
qDebug() << " next_in=" << d->zStream.next_in;
#else
if (result != Z_OK && result != Z_STREAM_END) {
//qDebug() << "Warning: inflate() returned " << result;
}
#endif
return (result == Z_OK ? KFilterBase::Ok : (result == Z_STREAM_END ? KFilterBase::End : KFilterBase::Error));
} else {
return uncompress_noop();
}
}
KGzipFilter::Result KGzipFilter::uncompress()
{
Q_ASSERT ( d->mode == QIODevice::ReadOnly );
if ( d->compressed )
{
int result = inflate(&d->zStream, Z_SYNC_FLUSH);
return ( result == Z_OK ? KFilterBase::Ok : ( result == Z_STREAM_END ? KFilterBase::End : KFilterBase::Error ) );
} else
return uncompress_noop();
}
KGzipFilter::Result KGzipFilter::uncompress()
{
#ifndef NDEBUG
if (d->mode == 0) {
//qWarning() << "mode==0; KGzipFilter::init was not called!";
return KFilterBase::Error;
} else if (d->mode == QIODevice::WriteOnly) {
//qWarning() << "uncompress called but the filter was opened for writing!";
return KFilterBase::Error;
}
Q_ASSERT(d->mode == QIODevice::ReadOnly);
#endif
if (!d->compressed) {
return uncompress_noop();
}
#ifdef DEBUG_GZIP
qDebug() << "Calling inflate with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
qDebug() << " next_in=" << d->zStream.next_in;
#endif
while (d->zStream.avail_in > 0) {
int result = inflate(&d->zStream, Z_SYNC_FLUSH);
#ifdef DEBUG_GZIP
qDebug() << " -> inflate returned " << result;
qDebug() << " now avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
qDebug() << " next_in=" << d->zStream.next_in;
#endif
if (result == Z_OK) {
return KFilterBase::Ok;
}
// We can't handle any other results
if (result != Z_STREAM_END) {
return KFilterBase::Error;
}
// It really was the end
if (d->zStream.avail_in == 0) {
return KFilterBase::End;
}
// Store before resetting
Bytef *data = d->zStream.next_in; // This is increased appropriately by zlib beforehand
uInt size = d->zStream.avail_in;
// Reset the stream, if that fails we assume we're at the end
if (!init(d->mode)) {
return KFilterBase::End;
}
// Reset the data to where we left off
d->zStream.next_in = data;
d->zStream.avail_in = size;
}
return KFilterBase::End;
}