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/* This file is part of the KDE libraries
SPDX-FileCopyrightText: 2000-2005 David Faure <faure@kde.org>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "kbzip2filter.h"
#include "loggingcategory.h"
#if HAVE_BZIP2_SUPPORT
// we don't need that
#define BZ_NO_STDIO
extern "C" {
#include <bzlib.h>
}
#if 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 <QDebug>
#include <QIODevice>
// For docu on this, see /usr/doc/bzip2-0.9.5d/bzip2-0.9.5d/manual_3.html
class Q_DECL_HIDDEN KBzip2Filter::Private
{
public:
Private()
: isInitialized(false)
{
memset(&zStream, 0, sizeof(zStream));
mode = 0;
}
bz_stream zStream;
int mode;
bool isInitialized;
};
KBzip2Filter::KBzip2Filter()
: d(new Private)
{
}
KBzip2Filter::~KBzip2Filter()
{
delete d;
}
bool KBzip2Filter::init(int mode)
{
if (d->isInitialized) {
terminate();
}
d->zStream.next_in = nullptr;
d->zStream.avail_in = 0;
if (mode == QIODevice::ReadOnly) {
const int result = bzDecompressInit(&d->zStream, 0, 0);
if (result != BZ_OK) {
// qCDebug(KArchiveLog) << "bzDecompressInit returned " << result;
return false;
}
} else if (mode == QIODevice::WriteOnly) {
const int result = bzCompressInit(&d->zStream, 5, 0, 0);
if (result != BZ_OK) {
// qCDebug(KArchiveLog) << "bzDecompressInit returned " << result;
return false;
}
} else {
// qCWarning(KArchiveLog) << "Unsupported mode " << mode << ". Only QIODevice::ReadOnly and QIODevice::WriteOnly supported";
return false;
}
d->mode = mode;
d->isInitialized = true;
return true;
}
int KBzip2Filter::mode() const
{
return d->mode;
}
bool KBzip2Filter::terminate()
{
if (d->mode == QIODevice::ReadOnly) {
const int result = bzDecompressEnd(&d->zStream);
if (result != BZ_OK) {
// qCDebug(KArchiveLog) << "bzDecompressEnd returned " << result;
return false;
}
} else if (d->mode == QIODevice::WriteOnly) {
const int result = bzCompressEnd(&d->zStream);
if (result != BZ_OK) {
// qCDebug(KArchiveLog) << "bzCompressEnd returned " << result;
return false;
}
} else {
// qCWarning(KArchiveLog) << "Unsupported mode " << d->mode << ". Only QIODevice::ReadOnly and QIODevice::WriteOnly supported";
return false;
}
d->isInitialized = false;
return true;
}
void KBzip2Filter::reset()
{
// bzip2 doesn't seem to have a reset call...
terminate();
init(d->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()
{
// qCDebug(KArchiveLog) << "Calling bzDecompress with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
int result = bzDecompress(&d->zStream);
if (result < BZ_OK) {
qCWarning(KArchiveLog) << "bzDecompress returned" << result;
}
switch (result) {
case BZ_OK:
return KFilterBase::Ok;
case BZ_STREAM_END:
return KFilterBase::End;
default:
return KFilterBase::Error;
}
}
KBzip2Filter::Result KBzip2Filter::compress(bool finish)
{
// qCDebug(KArchiveLog) << "Calling bzCompress with avail_in=" << inBufferAvailable() << " avail_out=" << outBufferAvailable();
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 KFilterBase::Ok;
break;
case BZ_STREAM_END:
// qCDebug(KArchiveLog) << " bzCompress returned " << result;
return KFilterBase::End;
break;
default:
// qCDebug(KArchiveLog) << " bzCompress returned " << result;
return KFilterBase::Error;
break;
}
}
#endif /* HAVE_BZIP2_SUPPORT */
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