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/* This file is part of the KDE libraries
Copyright (C) 2000 David Faure <faure@kde.org>
$Id$
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
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 <config.h>
#if defined( HAVE_BZIP2_SUPPORT )
// we don't need that
#define BZ_NO_STDIO
extern "C" {
#include <bzlib.h>
}
#ifdef NEED_BZ2_PREFIX
#define bzDecompressInit(x,y,z) BZ2_bzDecompressInit(x,y,z)
#define bzDecompressEnd(x) BZ2_bzDecompressEnd(x)
#define bzCompressEnd(x) BZ2_bzCompressEnd(x)
#define bzDecompress(x) BZ2_bzDecompress(x)
#define bzCompress(x,y) BZ2_bzCompress(x, y)
#define bzCompressInit(x,y,z,a) BZ2_bzCompressInit(x, y, z, a);
#endif
#include <kdebug.h>
#include <klibloader.h>
#include "kbzip2filter.h"
// For docu on this, see /usr/doc/bzip2-0.9.5d/bzip2-0.9.5d/manual_3.html
class KBzip2FilterFactory : public KLibFactory
{
public:
KBzip2FilterFactory() : KLibFactory() {}
virtual ~KBzip2FilterFactory(){}
QObject *createObject( QObject *, const char *, const char*, const QStringList & )
{
return new KBzip2Filter;
}
};
K_EXPORT_COMPONENT_FACTORY( kbzip2filter, KBzip2FilterFactory )
// Not really useful anymore
class KBzip2Filter::KBzip2FilterPrivate
{
public:
bz_stream zStream;
};
KBzip2Filter::KBzip2Filter()
{
d = new KBzip2FilterPrivate;
d->zStream.bzalloc = 0;
d->zStream.bzfree = 0;
d->zStream.opaque = 0;
m_mode = 0;
}
KBzip2Filter::~KBzip2Filter()
{
delete d;
}
void KBzip2Filter::init( int mode )
{
d->zStream.next_in = 0;
d->zStream.avail_in = 0;
if ( mode == IO_ReadOnly )
{
(void)bzDecompressInit(&d->zStream, 0, 0);
//kdDebug(7118) << "bzDecompressInit returned " << result << endl;
// No idea what to do with result :)
} else if ( mode == IO_WriteOnly ) {
(void)bzCompressInit(&d->zStream, 5, 0, 0);
//kdDebug(7118) << "bzDecompressInit returned " << result << endl;
} else
kdWarning(7118) << "Unsupported mode " << mode << ". Only IO_ReadOnly and IO_WriteOnly supported" << endl;
m_mode = mode;
}
void KBzip2Filter::terminate()
{
if ( m_mode == IO_ReadOnly )
{
int result = bzDecompressEnd(&d->zStream);
kdDebug(7118) << "bzDecompressEnd returned " << result << endl;
} else if ( m_mode == IO_WriteOnly )
{
int result = bzCompressEnd(&d->zStream);
kdDebug(7118) << "bzCompressEnd returned " << result << endl;
} else
kdWarning(7118) << "Unsupported mode " << m_mode << ". Only IO_ReadOnly and IO_WriteOnly supported" << endl;
}
void KBzip2Filter::reset()
{
kdDebug(7118) << "KBzip2Filter::reset" << endl;
// bzip2 doesn't seem to have a reset call...
terminate();
init( m_mode );
}
void KBzip2Filter::setOutBuffer( char * data, uint maxlen )
{
d->zStream.avail_out = maxlen;
d->zStream.next_out = data;
}
void KBzip2Filter::setInBuffer( const char *data, unsigned int size )
{
d->zStream.avail_in = size;
d->zStream.next_in = const_cast<char *>(data);
}
int KBzip2Filter::inBufferAvailable() const
{
return d->zStream.avail_in;
}
int KBzip2Filter::outBufferAvailable() const
{
return d->zStream.avail_out;
}
KBzip2Filter::Result KBzip2Filter::uncompress()
{
//kdDebug(7118) << "Calling bzDecompress with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable() << endl;
int result = bzDecompress(&d->zStream);
if ( result != BZ_OK )
{
kdDebug(7118) << "bzDecompress returned " << result << endl;
kdDebug(7118) << "KBzip2Filter::uncompress " << ( result == BZ_OK ? OK : ( result == BZ_STREAM_END ? END : ERROR ) ) << endl;
}
switch (result) {
case BZ_OK:
return OK;
case BZ_STREAM_END:
return END;
default:
return ERROR;
}
}
KBzip2Filter::Result KBzip2Filter::compress( bool finish )
{
//kdDebug(7118) << "Calling bzCompress with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable() << endl;
int result = bzCompress(&d->zStream, finish ? BZ_FINISH : BZ_RUN );
switch (result) {
case BZ_OK:
case BZ_FLUSH_OK:
case BZ_RUN_OK:
case BZ_FINISH_OK:
return OK;
break;
case BZ_STREAM_END:
kdDebug(7118) << " bzCompress returned " << result << endl;
return END;
break;
default:
kdDebug(7118) << " bzCompress returned " << result << endl;
return ERROR;
break;
}
}
#endif
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