/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the test suite of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qbic.h"+
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+
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#include "QtCore/qfile.h"+
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#include "QtCore/qdebug.h"+
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+
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void QBic::addBlacklistedClass(const QString &wildcard)+
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{+
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    blackList.append(QRegExp(wildcard, Qt::CaseSensitive, QRegExp::Wildcard));+
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}+
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+
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void QBic::removeBlacklistedClass(const QString &wildcard)+
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{+
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    blackList.removeAll(QRegExp(wildcard, Qt::CaseSensitive, QRegExp::Wildcard));+
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}+
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+
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bool QBic::isBlacklisted(const QString &className) const+
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{+
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    for (int i = 0; i < blackList.count(); ++i)+
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        if (blackList.at(i).exactMatch(className))+
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            return true;+
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    return false;+
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}+
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+
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static QStringList normalizedVTable(const QStringList &entry)+
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{+
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    QStringList normalized;+
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+
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    for (int i = 2; i < entry.count(); ++i) {+
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        const QString line = entry.at(i).simplified();+
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        bool isOk = false;+
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        int num = line.left(line.indexOf(QLatin1Char(' '))).toInt(&isOk);+
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        if (!isOk) {+
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            qWarning("unrecognized line: %s", qPrintable(line));+
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            continue;+
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        }+
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+
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        QString sym = line.mid(line.indexOf(QLatin1Char(' ')) + 1);+
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        if (sym.startsWith(QLatin1Char('('))) {+
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            if (sym.endsWith(QLatin1Char(')'))) {+
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                sym = sym.mid(sym.lastIndexOf('(') + 1);+
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                sym.chop(1);+
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            } else {+
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                sym = sym.mid(sym.lastIndexOf(QLatin1Char(')')) + 1);+
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            }+
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        } else {+
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            sym = sym.left(sym.indexOf(QLatin1Char('(')));+
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        }+
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+
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        if (sym.startsWith(QLatin1String("& ")))+
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            sym.remove(1, 1);+
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+
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        if (sym.startsWith(QLatin1String("-0")) || sym.startsWith(QLatin1String("0"))) {+
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            if (sym.endsWith('u'))+
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                sym.chop(1);+
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+
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            bool isOk = false;+
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            qint64 num = sym.toLongLong(&isOk, 16);+
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            if (!isOk) {+
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                qWarning("unrecognized token: %s", qPrintable(sym));+
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                continue;+
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            }+
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            if (sizeof(void*) == 4)+
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                sym = QString::number(int(num));+
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            else+
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                sym = QString::number(num);+
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        }+
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+
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        normalized << QString::number(num) + QLatin1Char(' ') + sym;+
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    }+
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+
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    return normalized;+
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}+
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+
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QBic::Info QBic::parseOutput(const QByteArray &ba) const+
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{+
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    Info info;+
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    const QStringList source = QString::fromLatin1(ba).split("\n\n");+
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+
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    foreach(QString str, source) {+
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        QStringList entry = str.split('\n');+
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        if (entry.count() < 2)+
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            continue;+
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        if (entry.at(0).startsWith("Class ")) {+
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            const QString className = entry.at(0).mid(6);+
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            if (isBlacklisted(className))+
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                continue;+
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            QRegExp rx("size=(\\d+)");+
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            if  (rx.indexIn(entry.at(1)) == -1) {+
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                qWarning("Could not parse class information for className %s", className.toLatin1().constData());+
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                continue;+
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            }+
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            info.classSizes[className] = rx.cap(1).toInt();+
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        } else if (entry.at(0).startsWith("Vtable for ")) {+
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            const QString className = entry.at(0).mid(11);+
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            if (isBlacklisted(className))+
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                continue;+
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            info.classVTables[className] = normalizedVTable(entry);+
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        }+
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    }+
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+
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    return info;+
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}+
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+
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QBic::Info QBic::parseFile(const QString &fileName) const+
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{+
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    QFile f(fileName);+
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    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))+
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        return Info();+
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+
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    QByteArray ba = f.readAll();+
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    f.close();+
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+
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    return parseOutput(ba);+
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}+
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+
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enum VTableDiffResult { Match, Mismatch, Reimp };+
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static VTableDiffResult diffVTableEntry(const QString &v1, const QString &v2)+
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{+
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    if (v1 == v2)+
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        return Match;+
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    if (v2.endsWith(QLatin1String("__cxa_pure_virtual")))+
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        return Reimp;+
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    if (!v1.contains(QLatin1String("::")) || !v2.contains(QLatin1String("::")))+
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        return Mismatch;+
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+
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    const QString sym1 = v1.mid(v1.lastIndexOf(QLatin1String("::")) + 2);+
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    const QString sym2 = v2.mid(v2.lastIndexOf(QLatin1String("::")) + 2);+
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+
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    if (sym1 == sym2)+
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        return Reimp;+
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+
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    return Mismatch;+
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}+
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+
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QBic::VTableDiff QBic::diffVTables(const Info &oldLib, const Info &newLib) const+
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{+
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    VTableDiff result;+
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+
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    for (QHash<QString, QStringList>::const_iterator it = newLib.classVTables.constBegin();+
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            it != newLib.classVTables.constEnd(); ++it) {+
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        if (!oldLib.classVTables.contains(it.key())) {+
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            result.addedVTables.append(it.key());+
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            continue;+
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        }+
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        const QStringList oldVTable = oldLib.classVTables.value(it.key());+
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        const QStringList vTable = it.value();+
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        if (vTable.count() != oldVTable.count()) {+
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            result.modifiedVTables.append(QPair<QString, QString>(it.key(),+
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                        QLatin1String("size mismatch")));+
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            continue;+
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        }+
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+
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        for (int i = 0; i < vTable.count(); ++i) {+
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            VTableDiffResult diffResult = diffVTableEntry(vTable.at(i), oldVTable.at(i));+
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            switch (diffResult) {+
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            case Match:+
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                // do nothing+
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                break;+
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            case Mismatch:+
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                result.modifiedVTables.append(QPair<QString, QString>(oldVTable.at(i),+
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                            vTable.at(i)));+
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                break;+
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            case Reimp:+
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                result.reimpMethods.append(QPair<QString, QString>(oldVTable.at(i), vTable.at(i)));+
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                break;+
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            }+
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        }+
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    }+
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+
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    for (QHash<QString, QStringList>::const_iterator it = oldLib.classVTables.constBegin();+
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            it != oldLib.classVTables.constEnd(); ++it) {+
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        if (!newLib.classVTables.contains(it.key()))+
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            result.removedVTables.append(it.key());+
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    }+
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+
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    return result;+
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}+
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+
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QBic::SizeDiff QBic::diffSizes(const Info &oldLib, const Info &newLib) const+
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{+
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    QBic::SizeDiff result;+
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+
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    for (QHash<QString, int>::const_iterator it = newLib.classSizes.constBegin();+
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            it != newLib.classSizes.constEnd(); ++it) {+
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        if (!oldLib.classSizes.contains(it.key())) {+
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            result.added.append(it.key());+
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            continue;+
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        }+
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        int oldSize = oldLib.classSizes.value(it.key());+
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        int newSize = it.value();+
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+
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        if (oldSize != newSize)+
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            result.mismatch.append(it.key());+
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    }+
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+
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    for (QHash<QString, int>::const_iterator it = oldLib.classSizes.constBegin();+
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            it != oldLib.classSizes.constEnd(); ++it) {+
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        if (!newLib.classSizes.contains(it.key()))+
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            result.removed.append(it.key());+
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    }+
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+
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    return result;+
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}+
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+
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