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/* This file is part of the KDE libraries
Copyright (C) 2007-2008 Per Øyvind Karlsen <peroyvind@mandriva.org>
Based on kbzip2filter:
Copyright (C) 2000-2005 David Faure <faure@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "kxzfilter.h"
#include <klibloader.h>
#include <config.h>
#if HAVE_XZ_SUPPORT
extern "C" {
#include <lzma.h>
}
#include <kdebug.h>
#include <tqiodevice.h>
// #define DEBUG_XZ
class KXzFilterFactory : public KLibFactory
{
public:
KXzFilterFactory() : KLibFactory() {}
virtual ~KXzFilterFactory(){}
TQObject *createObject( TQObject *, const char *, const char*, const TQStringList & )
{
return new KXzFilter;
}
};
K_EXPORT_COMPONENT_FACTORY( kxzfilter, KXzFilterFactory )
class KXzFilter::Private
{
public:
Private()
: isInitialized(false)
{
memset(&zStream, 0, sizeof(zStream));
mode = 0;
}
lzma_stream zStream;
int mode;
bool isInitialized;
};
KXzFilter::KXzFilter()
:d(new Private)
{
}
KXzFilter::~KXzFilter()
{
delete d;
}
void KXzFilter::init( int mode )
{
if (d->isInitialized) {
terminate();
}
lzma_ret result;
d->zStream.next_in = 0;
d->zStream.avail_in = 0;
if ( mode == IO_ReadOnly )
{
/* We set the memlimit for decompression to 100MiB which should be
* more than enough to be sufficient for level 9 which requires 65 MiB.
*/
result = lzma_auto_decoder(&d->zStream, 100<<20, 0);
//kdDebug(7131) << "lzma_auto_decoder returned " << result;
} else if ( mode == IO_WriteOnly ) {
result = lzma_easy_encoder(&d->zStream, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC32);
//kdDebug(7131) << "lzma_easy_encoder returned " << result;
} else
kdWarning(7131) << "Unsupported mode " << mode << ". Only IO_ReadOnly and IO_WriteOnly supported";
d->mode = mode;
d->isInitialized = true;
}
int KXzFilter::mode() const
{
return d->mode;
}
void KXzFilter::terminate()
{
if (d->mode == IO_ReadOnly || d->mode == IO_WriteOnly) {
lzma_end(&d->zStream);
} else {
kdWarning(7131) << "Unsupported mode " << d->mode << ". Only IO_ReadOnly and IO_WriteOnly supported";
}
d->isInitialized = false;
}
void KXzFilter::reset()
{
//kdDebug(7131) << "KXzFilter::reset";
// liblzma doesn't have a reset call...
terminate();
init( d->mode );
}
void KXzFilter::setOutBuffer( char * data, uint maxlen )
{
d->zStream.avail_out = maxlen;
d->zStream.next_out = (uint8_t *)data;
}
void KXzFilter::setInBuffer( const char *data, unsigned int size )
{
d->zStream.avail_in = size;
d->zStream.next_in = (uint8_t *)const_cast<char *>(data);
}
int KXzFilter::inBufferAvailable() const
{
return d->zStream.avail_in;
}
int KXzFilter::outBufferAvailable() const
{
return d->zStream.avail_out;
}
KXzFilter::Result KXzFilter::uncompress()
{
//kdDebug(7131) << "Calling lzma_code with avail_in=" << inBufferAvailable() << " avail_out =" << outBufferAvailable();
lzma_ret result = lzma_code(&d->zStream, LZMA_RUN);
if ( result != LZMA_OK )
{
kdDebug(7131) << "lzma_code returned " << result;
kdDebug(7131) << "KXzFilter::uncompress " << ( result == LZMA_STREAM_END ? END : ERROR );
}
switch (result) {
case LZMA_OK:
return OK;
case LZMA_STREAM_END:
return END;
default:
return ERROR;
}
}
KXzFilter::Result KXzFilter::compress( bool finish )
{
//kdDebug(7131) << "Calling lzma_code with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
lzma_ret result = lzma_code(&d->zStream, finish ? LZMA_FINISH : LZMA_RUN );
switch (result) {
case LZMA_OK:
return OK;
break;
case LZMA_STREAM_END:
kdDebug(7131) << " lzma_code returned " << result;
return END;
break;
default:
kdDebug(7131) << " lzma_code returned " << result;
return ERROR;
break;
}
}
#endif /* HAVE_XZ_SUPPORT */
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