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

**

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the test suite of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include "dataparser.h"

#include <QString>

#include <QVector>

#include <QFile>

#include <QTextStream>

#include <QtDebug>

static QList<qreal> parseNumbersList(QByteArray::const_iterator &itr)

{

    QList<qreal> points;

    QByteArray temp;

    while ((*itr) == ' ')

        ++itr;

    while (((*itr) >= '0' && (*itr) <= '9') ||

           (*itr) == '-' || (*itr) == '+') {

        temp = QByteArray();

        if ((*itr) == '-')

            temp += *itr++;

        else if ((*itr) == '+')

            temp += *itr++;

        while ((*itr) >= '0' && (*itr) <= '9')

            temp += *itr++;

        if ((*itr) == '.')

            temp += *itr++;

        while ((*itr) >= '0' && (*itr) <= '9')

            temp += *itr++;

        if (( *itr) == 'e') {

            temp += *itr++;

            if ((*itr) == '-' ||

                (*itr) == '+')

                temp += *itr++;

        }

        while ((*itr) >= '0' && (*itr) <= '9')

            temp += *itr++;

        while ((*itr) == ' ')

            ++itr;

        if ((*itr) == ',')

            ++itr;

        points.append(temp.toDouble());

        //eat the rest of space

        while ((*itr) == ' ')

            ++itr;

    }

    return points;

}

static QList<QPointF> parsePoints(const QByteArray &line)

{

    QList<QPointF> res;

    QByteArray::const_iterator it = line.constBegin();

    if (*it == ',')

        ++it;

    QList<qreal> nums = parseNumbersList(it);

    QList<qreal>::const_iterator nitr;

    for (nitr = nums.begin(); nitr != nums.end(); ++nitr) {

        qreal x = *nitr; ++nitr;

        Q_ASSERT(nitr != nums.end());

        qreal y = *nitr;

        res.append(QPointF(x, y));

    }

    return res;

}

QList< QVector<QPointF> > parseData(const QByteArray &contents)

{

    QList<QByteArray> lines = contents.split('\n');

    QList<QByteArray>::const_iterator itr;

    QList< QVector<QPointF> > res;

    QVector<QPointF> current;

    for (itr = lines.begin(); itr != lines.end(); ++itr) {

        QByteArray line = (*itr).trimmed();

        if (line.isEmpty() || line.startsWith('/')) {

            if (!current.isEmpty()) {

                res.append(current);

                current = QVector<QPointF>();

            }

            continue;

        } else {

            QList<QPointF> lst = parsePoints(line);

            current << lst.toVector();

        }

    }

    return res;

}

QList< QVector<QPointF> > parseFile(const QString &fileName)

{

    QList< QVector<QPointF> > res;

    QFile file(fileName);

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

        qDebug()<<"couldn't open "<<fileName;

        return res;

    }

    QVector<QPointF> current;

    while (!file.atEnd()) {

        QByteArray line = file.readLine().trimmed();

        if (line.isEmpty() || line.startsWith('/')) {

            if (!current.isEmpty()) {

                res.append(current);

                current = QVector<QPointF>();

            }

            continue;

        } else {

            QList<QPointF> lst = parsePoints(line);

            current << lst.toVector();

        }

    }

    return res;

}