/*
Copyright 1998  Helge Deller deller@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) version 3 or any later version
accepted by the membership of KDE e.V. (or its successor approved
by the membership of KDE e.V.), which shall act as a proxy 
defined in Section 14 of version 3 of the license.

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 <unistd.h>
#include <syscall.h>
#include <stdio.h>
#include <sys/stat.h>
#include <linux/kernel.h>
#include <ctype.h>

#include <QRegExp>
#include <QFile>
#include <QHeaderView>

#include <klocale.h>
#include <kiconloader.h>
#include <kglobalsettings.h>
#include <kstandarddirs.h>
#include <kdebug.h>

#define INFO_IRQ "/proc/interrupts"
#define INFO_DMA "/proc/dma"

#define INFO_PCI "/proc/pci"

#define INFO_IOPORTS "/proc/ioports"

#define INFO_MISC "/proc/misc"

#define INFO_SCSI "/proc/scsi/scsi"

#define MAXCOLUMNWIDTH 600

bool GetInfo_ReadfromFile(QTreeWidget* tree, const char *FileName, const QChar& splitChar) {
    bool added = false;
    QFile file(FileName);

    if (!file.exists()) {
        return false;
    }

    if (!file.open(QIODevice::ReadOnly)) {
        return false;
    }
    QTextStream stream(&file);

    QString line = stream.readLine();

    while (!line.isNull()) {
        QString s1, s2;
        if (!line.isEmpty()) {
            if (!splitChar.isNull()) {
                int pos = line.indexOf(splitChar);
                s1 = line.left(pos-1).trimmed();
                s2 = line.mid(pos+1).trimmed();
            } else {
                s1 = line;
            }
        }
        QStringList list;
        list << s1 << s2;
        new QTreeWidgetItem(tree, list);
        added = true;
        line = stream.readLine();
    }

    file.close();

    return added;
}

bool GetInfo_IRQ(QTreeWidget* tree) {
    tree->setFont(KGlobalSettings::fixedFont());
    tree->setHeaderHidden(true);
    
    return GetInfo_ReadfromFile(tree, INFO_IRQ, 0);
}

bool GetInfo_DMA(QTreeWidget* tree) {
    QFile file(INFO_DMA);

    QStringList headers;
    headers << i18n("DMA-Channel") << i18n("Used By");
    tree->setHeaderLabels(headers);

    if (file.exists() && file.open(QIODevice::ReadOnly)) {
        QTextStream stream(&file);
        QString line;

        line = stream.readLine();
        while (!line.isNull()) {
            if (!line.isEmpty()) {
                QRegExp rx("^\\s*(\\S+)\\s*:\\s*(\\S+)");
                if (-1 != rx.indexIn(line)) {
                    QStringList list;
                    list << rx.cap(1) << rx.cap(2);
                    new QTreeWidgetItem(tree, list);
                }
            }
            line = stream.readLine();
        }
        file.close();
    } else {
        return false;
    }

    return true;
}

bool GetInfo_PCI(QTreeWidget* tree) {
    tree->setHeaderHidden(true);
    tree->setSortingEnabled(false);

    QByteArray lspciCmd = KStandardDirs::findRootExe("lspci").toLocal8Bit();
    if (lspciCmd.isEmpty()) {
        return false;
    }
    lspciCmd.append(" -v");

    /* try to get the output of the lspci package first */
    if (GetInfo_ReadfromPipe(tree, lspciCmd.constData(), true)) {
        return true;
    }

    /* if lspci failed, read the contents of /proc/pci */
    return GetInfo_ReadfromFile(tree, INFO_PCI, 0);
}

bool GetInfo_IO_Ports(QTreeWidget* tree) {
    QStringList headers;
    headers << i18n("I/O-Range") << i18n("Used By");
    tree->setHeaderLabels(headers);
    return GetInfo_ReadfromFile(tree, INFO_IOPORTS, ':');
}

bool GetInfo_SCSI(QTreeWidget* tree) {
    return GetInfo_ReadfromFile(tree, INFO_SCSI, 0);
}

bool GetInfo_XServer_and_Video(QTreeWidget* tree) {
    return GetInfo_XServer_Generic(tree);
}