~sithlord48/hyne/master

/****************************************************************************

 ** Hyne Final Fantasy VIII Save Editor

 ** Copyright (C) 2012-2013 Arzel Jérôme <myst6re@gmail.com>

 **

 ** This program is free software: you can redistribute it and/or modify

 ** it under the terms of the GNU General Public License as published by

 ** the Free Software Foundation, either version 3 of the License, or

 ** (at your option) any later version.

 **

 ** This program 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 General Public License for more details.

 **

 ** You should have received a copy of the GNU General Public License

 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.

 ****************************************************************************/

#include "GZIP.h"

#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0)) && (defined(Q_OS_WIN) || defined(Q_OS_MAC))

#include "zlib-1.2.7/zlib.h"

#else

#include <zlib.h>

#endif

#undef compress // conflict with GZIP::compress

#define BUF_SIZE	8192

QByteArray GZIP::decompress(const QByteArray &data, int/* decSize*/)

{

	QByteArray ungzip;

	QTemporaryFile temp;

	if(!temp.open()) {

		return QByteArray();

	}

	temp.write(data);

	temp.close();

	gzFile file = gzopen(temp.fileName().toLatin1(), "rb");

	if(!file) {

		return QByteArray();

	}

	char buffer[10000];

	int r;

	while((r = gzread(file, buffer, 10000)) > 0) {

		ungzip.append(buffer, r);

	}

	gzclose(file);

	return ungzip;

}

QByteArray GZIP::compress(const QByteArray &ungzip)

{

	QString tempPath = QDir::tempPath()+"/qt_temp.gz";

	gzFile file2 = gzopen(tempPath.toLatin1(), "wb9");

	if(!file2) {

		return QByteArray();

	}

	gzwrite(file2, ungzip.constData(), ungzip.size());

	gzclose(file2);

	QFile finalFile(tempPath);

	if(!finalFile.open(QIODevice::ReadOnly)) {

		return QByteArray();

	}

	QByteArray data = finalFile.readAll();

	finalFile.remove();

	return data;

}

bool GZIP::decompress(const QString &pathFrom, const QString &pathTo)

{

	QFile to(pathTo);

	if(!to.open(QIODevice::WriteOnly)) {

		return false;

	}

	gzFile file = gzopen(pathFrom.toLatin1(), "rb");

	if(!file) {

		return false;

	}

	char buffer[BUF_SIZE];

	int r;

	while((r = gzread(file, buffer, BUF_SIZE)) > 0) {

		to.write(buffer, r);

	}

	gzclose(file);

	to.close();

	return true;

}

bool GZIP::compress(const QString &pathFrom, const QString &pathTo)

{

	QFile from(pathFrom);

	if(!from.open(QIODevice::ReadOnly)) {

		return false;

	}

	gzFile file = gzopen(pathTo.toLatin1(), "wb9");

	if(!file) {

		return false;

	}

	char buffer[BUF_SIZE];

	int r;

	while((r = from.read(buffer, BUF_SIZE)) > 0) {

		gzwrite(file, buffer, BUF_SIZE);

	}

	gzclose(file);

	from.close();

	return true;

}