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/***************************************************************************
* Copyright (C) 2008 by Oliver Groß *
* z.o.gross@gmx.de *
* *
* 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 2 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "ccrosspackage.h"
#include "nonogramproblem.h"
#include <QDataStream>
#include <QFile>
namespace libqnono {
//public:
CCrossPackage::CCrossPackage() : m_File(NULL), m_headersOnly(false) {}
CCrossPackage::~CCrossPackage() {
close();
}
bool CCrossPackage::open() {
close();
if (m_FileName.isEmpty())
return false;
qDebug("opening file: %s", m_FileName.toAscii().data());
m_File = new QFile(m_FileName);
if (!m_File->open(QIODevice::ReadOnly)) {
delete m_File;
m_File = NULL;
return false;
}
return true;
}
void CCrossPackage::close() {
if (m_File) {
m_File->close();
delete m_File;
m_File = NULL;
}
}
bool CCrossPackage::doReadHeader() {
QDataStream in(m_File);
in.setVersion(QDataStream::Qt_4_0);
QString stringBuffer;
QSize sizeBuffer;
qDebug("reading header");
if (in.atEnd()) {
qCritical("invalid package file - no header");
close();
return false;
}
in >> stringBuffer;
if ((stringBuffer != "QCROSSPACKAGE")) {
qCritical("invalid package file - invalid header: %s", stringBuffer.toAscii().data());
close();
return false;
}
if (in.atEnd()) {
qCritical("invalid package file - no package name");
close();
return false;
}
in >> stringBuffer;
if (stringBuffer.isEmpty()) {
qCritical("invalid package file - invalid package name");
close();
return false;
}
m_Name = stringBuffer;
m_headersOnly = true;
return true;
}
bool CCrossPackage::doReadData() {
if (!m_File)
return false;
m_PictureList.clear();
QDataStream in(m_File);
in.setVersion(QDataStream::Qt_4_0);
qint32 pictureCount = 0;
if (in.atEnd()) {
qCritical("invalid package file - no picture count");
close();
return false;
}
in >> pictureCount;
int i;
for (i = 0; i < pictureCount && !in.atEnd(); i++) {
m_PictureList.append(NonogramProblem());
if (!m_PictureList.last().readFromStream(in)) {
m_PictureList.pop_back();
qCritical("invalid package file - invalid picture");
close();
return false;
}
}
if (i < pictureCount)
qWarning("damaged package file - invalid picture count");
m_headersOnly = false;
return true;
}
const NonogramProblem & CCrossPackage::getPicture(int ndx) {
loadPictures();
return m_PictureList[ndx];
}
bool CCrossPackage::loadPictures() {
if (!m_headersOnly) return true;
if (!open() || !doReadHeader() || !doReadData()) {
close();
return false;
}
close();
return true;
}
void CCrossPackage::unloadPictures() {
if (!m_PictureList.empty()) {
m_PictureList.clear();
m_headersOnly = true;
}
}
bool CCrossPackage::save() {
Q_ASSERT(!m_headersOnly);
QFile file(m_FileName);
if (!file.open(QIODevice::WriteOnly))
return false;
QDataStream out(&file);
out.setVersion(QDataStream::Qt_4_0);
out << QString("QCROSSPACKAGE");
out << m_Name;
out << (qint32)(m_PictureList.size());
foreach (const NonogramProblem & i, m_PictureList)
i.writeToStream(out);
file.close();
return true;
}
CCrossPackage * CCrossPackage::read(QString fileName) {
CCrossPackage *p = new CCrossPackage();
p->setFileName(fileName);
if (!p->open() || !p->doReadHeader() || !p->doReadData()) {
delete p;
return NULL;
}
p->close();
return p;
}
CCrossPackage * CCrossPackage::readHeader(QString fileName) {
CCrossPackage *p = new CCrossPackage();
p->setFileName(fileName);
if (!p->open() || !p->doReadHeader()) {
delete p;
return NULL;
}
p->close();
return p;
}
}