qlibraryinfo.cpp

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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdir.h"
#include "qfile.h"
#include "qconfig.h"
#include "qsettings.h"
#include "qlibraryinfo.h"
#include "qscopedpointer.h"

#if defined(QT_BUILD_QMAKE) || defined(QT_BOOTSTRAPPED)
# define BOOTSTRAPPING
#endif

#ifdef BOOTSTRAPPING
QT_BEGIN_NAMESPACE
extern QString qmake_libraryInfoFile();
QT_END_NAMESPACE
#else
# include "qcoreapplication.h"
#endif

#ifdef Q_OS_MAC
#  include "private/qcore_mac_p.h"
#endif

#ifdef QLIBRARYINFO_EPOCROOT
# include "symbian/epocroot_p.h"
#endif

#include "qconfig.cpp"

QT_BEGIN_NAMESPACE

extern void qDumpCPUFeatures(); // in qsimd.cpp

#ifndef QT_NO_SETTINGS

struct QLibrarySettings
{
    QLibrarySettings();
    QScopedPointer<QSettings> settings;
};
Q_GLOBAL_STATIC(QLibrarySettings, qt_library_settings)

class QLibraryInfoPrivate
{
public:
    static QSettings *findConfiguration();
    static void cleanup()
    {
        QLibrarySettings *ls = qt_library_settings();
        if (ls)
            ls->settings.reset(0);
    }
    static QSettings *configuration()
    {
        QLibrarySettings *ls = qt_library_settings();
        return ls ? ls->settings.data() : 0;
    }
};

QLibrarySettings::QLibrarySettings()
    : settings(QLibraryInfoPrivate::findConfiguration())
{
#ifndef BOOTSTRAPPING
    qAddPostRoutine(QLibraryInfoPrivate::cleanup);
#endif
}

QSettings *QLibraryInfoPrivate::findConfiguration()
{
    QString qtconfig = QLatin1String(":/qt/etc/qt.conf");
#ifdef BOOTSTRAPPING
    if(!QFile::exists(qtconfig))
        qtconfig = qmake_libraryInfoFile();
#else
    if (!QFile::exists(qtconfig) && QCoreApplication::instance()) {
#ifdef Q_OS_MAC
    CFBundleRef bundleRef = CFBundleGetMainBundle();
        if (bundleRef) {
        QCFType<CFURLRef> urlRef = CFBundleCopyResourceURL(bundleRef,
                                   QCFString(QLatin1String("qt.conf")),
                                   0,
                                   0);
        if (urlRef) {
            QCFString path = CFURLCopyFileSystemPath(urlRef, kCFURLPOSIXPathStyle);
        qtconfig = QDir::cleanPath(path);
        }
    }
    if (qtconfig.isEmpty())
#endif
            {
                QDir pwd(QCoreApplication::applicationDirPath());
                qtconfig = pwd.filePath(QLatin1String("qt.conf"));
        }
    }
#endif
    if (QFile::exists(qtconfig))
        return new QSettings(qtconfig, QSettings::IniFormat);
    return 0;     //no luck
}

QLibraryInfo::QLibraryInfo()
{ }

QString
QLibraryInfo::licensee()
{
    const char *str = QT_CONFIGURE_LICENSEE;
    return QString::fromLocal8Bit(str);
}

QString
QLibraryInfo::licensedProducts()
{
    const char *str = QT_CONFIGURE_LICENSED_PRODUCTS;
    return QString::fromLatin1(str);
}

QString
QLibraryInfo::buildKey()
{
    return QString::fromLatin1(QT_BUILD_KEY);
}

#ifndef QT_NO_DATESTRING
QDate
QLibraryInfo::buildDate()
{
    return QDate::fromString(QString::fromLatin1(qt_configure_installation + 12), Qt::ISODate);
}
#endif //QT_NO_DATESTRING

QString
QLibraryInfo::location(LibraryLocation loc)
{
    QString ret;
    if(!QLibraryInfoPrivate::configuration()) {
        const char *path = 0;
        switch (loc) {
#ifdef QT_CONFIGURE_PREFIX_PATH
        case PrefixPath:
            path = QT_CONFIGURE_PREFIX_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_DOCUMENTATION_PATH
        case DocumentationPath:
            path = QT_CONFIGURE_DOCUMENTATION_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_HEADERS_PATH
        case HeadersPath:
            path = QT_CONFIGURE_HEADERS_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_LIBRARIES_PATH
        case LibrariesPath:
            path = QT_CONFIGURE_LIBRARIES_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_BINARIES_PATH
        case BinariesPath:
            path = QT_CONFIGURE_BINARIES_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_PLUGINS_PATH
        case PluginsPath:
            path = QT_CONFIGURE_PLUGINS_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_IMPORTS_PATH
        case ImportsPath:
            path = QT_CONFIGURE_IMPORTS_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_DATA_PATH
        case DataPath:
            path = QT_CONFIGURE_DATA_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_TRANSLATIONS_PATH
        case TranslationsPath:
            path = QT_CONFIGURE_TRANSLATIONS_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_SETTINGS_PATH
        case SettingsPath:
            path = QT_CONFIGURE_SETTINGS_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_EXAMPLES_PATH
        case ExamplesPath:
            path = QT_CONFIGURE_EXAMPLES_PATH;
            break;
#endif
#ifdef QT_CONFIGURE_DEMOS_PATH
        case DemosPath:
            path = QT_CONFIGURE_DEMOS_PATH;
            break;
#endif
        default:
            break;
        }

        if (path)
            ret = QString::fromLocal8Bit(path);
    } else {
        QString key;
        QString defaultValue;
        switch(loc) {
        case PrefixPath:
            key = QLatin1String("Prefix");
            break;
        case DocumentationPath:
            key = QLatin1String("Documentation");
            defaultValue = QLatin1String("doc");
            break;
        case HeadersPath:
            key = QLatin1String("Headers");
            defaultValue = QLatin1String("include");
            break;
        case LibrariesPath:
            key = QLatin1String("Libraries");
            defaultValue = QLatin1String("lib");
            break;
        case BinariesPath:
            key = QLatin1String("Binaries");
            defaultValue = QLatin1String("bin");
            break;
        case PluginsPath:
            key = QLatin1String("Plugins");
            defaultValue = QLatin1String("plugins");
            break;
        case ImportsPath:
            key = QLatin1String("Imports");
            defaultValue = QLatin1String("imports");
            break;
        case DataPath:
            key = QLatin1String("Data");
            break;
        case TranslationsPath:
            key = QLatin1String("Translations");
            defaultValue = QLatin1String("translations");
            break;
        case SettingsPath:
            key = QLatin1String("Settings");
            break;
        case ExamplesPath:
            key = QLatin1String("Examples");
            break;
        case DemosPath:
            key = QLatin1String("Demos");
            break;
        default:
            break;
        }

        if(!key.isNull()) {
            QSettings *config = QLibraryInfoPrivate::configuration();
            config->beginGroup(QLatin1String("Paths"));

            QString subKey;
            {
                /*
                  find the child group whose version number is closest
                  to the library version.  for example and we have the
                  following groups:

                  Paths
                  Paths/4.0
                  Paths/4.1.2
                  Paths/4.2.5
                  Paths/5

                  if QT_VERSION is 4.0.1, then we use 'Paths/4.0'
                  if QT_VERSION is 4.1.5, then we use 'Paths/4.1.2'
                  if QT_VERSION is 4.6.3, then we use 'Paths/4.2.5'
                  if QT_VERSION is 6.0.2, then we use 'Paths/5'

                  note: any of the trailing version numbers may be
                  omitted (in which case, they default to zero),
                  i.e. 4 == 4.0.0, 4.1 == 4.1.0, and so on
                */
                enum {
                    QT_MAJOR = ((QT_VERSION >> 16) & 0xFF),
                    QT_MINOR = ((QT_VERSION >> 8) & 0xFF),
                    QT_PATCH = (QT_VERSION & 0xFF)
                };
                int maj = 0, min = 0, pat = 0;
                QStringList children = config->childGroups();
                for(int child = 0; child < children.size(); ++child) {
                    QString cver = children.at(child);
                    QStringList cver_list = cver.split(QLatin1Char('.'));
                    if(cver_list.size() > 0 && cver_list.size() < 4) {
                        bool ok;
                        int cmaj = -1, cmin = -1, cpat = -1;
                        cmaj = cver_list[0].toInt(&ok);
                        if(!ok || cmaj < 0)
                            continue;
                        if(cver_list.size() >= 2) {
                            cmin = cver_list[1].toInt(&ok);
                            if(!ok)
                                continue;
                            if(cmin < 0)
                                cmin = -1;
                        }
                        if(cver_list.size() >= 3) {
                            cpat = cver_list[2].toInt(&ok);
                            if(!ok)
                                continue;
                            if(cpat < 0)
                                cpat = -1;
                        }
                        if((cmaj >= maj && cmaj <= QT_MAJOR) &&
                           (cmin == -1 || (cmin >= min && cmin <= QT_MINOR)) &&
                           (cpat == -1 || (cpat >= pat && cpat <= QT_PATCH)) &&
                           config->contains(cver + QLatin1Char('/') + key)) {
                            subKey = cver + QLatin1Char('/');
                            maj = cmaj;
                            min = cmin;
                            pat = cpat;
                        }
                    }
                }
            }
            ret = config->value(subKey + key, defaultValue).toString();
            // expand environment variables in the form $(ENVVAR)
            int rep;
            QRegExp reg_var(QLatin1String("\\$\\(.*\\)"));
            reg_var.setMinimal(true);
            while((rep = reg_var.indexIn(ret)) != -1) {
                ret.replace(rep, reg_var.matchedLength(),
                            QString::fromLocal8Bit(qgetenv(ret.mid(rep + 2,
                                reg_var.matchedLength() - 3).toLatin1().constData()).constData()));
            }

#ifdef QLIBRARYINFO_EPOCROOT
            // $${EPOCROOT} is a special case, resolve it similarly to qmake.
            QRegExp epocrootMatcher(QLatin1String("\\$\\$\\{EPOCROOT\\}"));
            if ((rep = epocrootMatcher.indexIn(ret)) != -1)
                ret.replace(rep, epocrootMatcher.matchedLength(), qt_epocRoot());
#endif

            config->endGroup();
        }
    }

    if (QDir::isRelativePath(ret)) {
        QString baseDir;
        if (loc == PrefixPath) {
            // we make the prefix path absolute to the executable's directory
#ifdef BOOTSTRAPPING
            baseDir = QFileInfo(qmake_libraryInfoFile()).absolutePath();
#else
            if (QCoreApplication::instance()) {
#ifdef Q_OS_MAC
                CFBundleRef bundleRef = CFBundleGetMainBundle();
                if (bundleRef) {
                    QCFType<CFURLRef> urlRef = CFBundleCopyBundleURL(bundleRef);
                    if (urlRef) {
                        QCFString path = CFURLCopyFileSystemPath(urlRef, kCFURLPOSIXPathStyle);
                        return QDir::cleanPath(QString(path) + QLatin1String("/Contents/") + ret);
                    }
                }
#endif
                baseDir = QCoreApplication::applicationDirPath();
            } else {
                baseDir = QDir::currentPath();
            }
#endif
        } else {
            // we make any other path absolute to the prefix directory
            baseDir = location(PrefixPath);
        }
        ret = QDir::cleanPath(baseDir + QLatin1Char('/') + ret);
    }
    return ret;
}

#endif // QT_NO_SETTINGS

QT_END_NAMESPACE

#if defined(Q_CC_GNU) && defined(ELF_INTERPRETER)
#  include <stdio.h>
#  include <stdlib.h>

extern const char qt_core_interpreter[] __attribute__((section(".interp")))
    = ELF_INTERPRETER;

extern "C" void qt_core_boilerplate();
void qt_core_boilerplate()
{
    printf("This is the QtCore library version " QT_VERSION_STR "\n"
           "Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).\n"
           "Contact: http://www.qt-project.org/legal\n"
           "\n"
           "Build key:           " QT_BUILD_KEY "\n"
           "Compat build key:    "
#ifdef QT_BUILD_KEY_COMPAT
           "| " QT_BUILD_KEY_COMPAT " "
#endif
#ifdef QT_BUILD_KEY_COMPAT2
           "| " QT_BUILD_KEY_COMPAT2 " "
#endif
#ifdef QT_BUILD_KEY_COMPAT3
           "| " QT_BUILD_KEY_COMPAT3 " "
#endif
           "|\n"
           "Build date:          %s\n"
           "Installation prefix: %s\n"
           "Library path:        %s\n"
           "Include path:        %s\n",
           qt_configure_installation + 12,
           qt_configure_prefix_path_str + 12,
           qt_configure_libraries_path_str + 12,
           qt_configure_headers_path_str + 12);

    QT_PREPEND_NAMESPACE(qDumpCPUFeatures)();

#ifdef QT_EVAL
    extern void qt_core_eval_init(uint);
    qt_core_eval_init(1);
#endif

    exit(0);
}

#endif