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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

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

**

** This file is part of the QtCore module 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 "qdir.h"

#include "qfile.h"

#include "qconfig.h"

#include "qsettings.h"

#include "qlibraryinfo.h"

#include "qscopedpointer.h"

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

#include "qconfig.cpp"

QT_BEGIN_NAMESPACE

#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())

{

    qAddPostRoutine(QLibraryInfoPrivate::cleanup);

#endif

}

QSettings *QLibraryInfoPrivate::findConfiguration()

{

    QString qtconfig = QLatin1String(":/qt/etc/qt.conf");

    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

}

/*!

    \class QLibraryInfo

    \brief The QLibraryInfo class provides information about the Qt library.

    Many pieces of information are established when Qt is configured.

    Installation paths, license information, and even a unique build

    key. This class provides an abstraction for accessing this

    information.

    \table

    \header \o Function           \o Return value

    \row    \o buildKey()         \o A string that identifies the Qt version and

                                     the configuration. This key is used to ensure

                                     that \l{plugins} link against the same version

                                     of Qt as the application.

    \row    \o location()         \o The path to a certain Qt

                                     component (e.g., documentation, header files).

    \row    \o licensee(),

               licensedProducts() \o Licensing information.

    \endtable

    You can also use a \c qt.conf file to override the hard-coded paths

    that are compiled into the Qt library. For more information, see

    the \l {Using qt.conf} documentation.

    \sa QSysInfo, {Using qt.conf}

*/

/*! \internal

   You cannot create a QLibraryInfo, instead only the static functions are available to query

   information.

*/

QLibraryInfo::QLibraryInfo()

{ }

/*!

  Returns the person to whom this build of Qt is licensed.

  \sa licensedProducts()

*/

QString

QLibraryInfo::licensee()

{

    const char *str = QT_CONFIGURE_LICENSEE;

    return QString::fromLocal8Bit(str);

}

/*!

  Returns the products that the license for this build of Qt has access to.

  \sa licensee()

*/

QString

QLibraryInfo::licensedProducts()

{

    const char *str = QT_CONFIGURE_LICENSED_PRODUCTS;

    return QString::fromLatin1(str);

}

/*!

    Returns a unique key identifying this build of Qt and its

    configurations. This key is not globally unique, rather only useful

    for establishing of two configurations are compatible. This can be

    used to compare with the \c QT_BUILD_KEY preprocessor symbol.

    \sa location()

*/

QString

QLibraryInfo::buildKey()

{

    return QString::fromLatin1(QT_BUILD_KEY);

}

/*!

  Returns the location specified by \a loc.

*/

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_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 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()));

            }

            config->endGroup();

        }

    }

    if (QDir::isRelativePath(ret)) {

        if (loc == PrefixPath) {

            // we make the prefix path absolute to the executable's directory

            return 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(path + QLatin1String("/Contents/") + ret);

                    }

                }

#endif

                return QDir(QCoreApplication::applicationDirPath()).absoluteFilePath(ret);

            } else {

                return QDir::current().absoluteFilePath(ret);

            }

#endif

        } else {

            // we make any other path absolute to the prefix directory

            return QDir(location(PrefixPath)).absoluteFilePath(ret);

        }

    }

    return ret;

}

/*!

    \enum QLibraryInfo::LibraryLocation

    \keyword library location

    This enum type is used to specify a specific location

    specifier:

    \value PrefixPath The default prefix for all paths.

    \value DocumentationPath The location for documentation upon install.

    \value HeadersPath The location for all headers.

    \value LibrariesPath The location of installed librarires.

    \value BinariesPath The location of installed Qt binaries (tools and applications).

    \value PluginsPath The location of installed Qt plugins.

    \value DataPath The location of general Qt data.

    \value TranslationsPath The location of translation information for Qt strings.

    \value SettingsPath The location for Qt settings.

    \value ExamplesPath The location for examples upon install.

    \value DemosPath The location for demos upon install.

    \sa location()

*/

#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) 2009 Nokia Corporation and/or its subsidiary(-ies).\n"

           "Contact: Nokia Corporation (qt-info@nokia.com)\n"

           "\n"

           "Build key:           " QT_BUILD_KEY "\n"

           "Installation prefix: %s\n"

           "Library path:        %s\n"

           "Include path:        %s\n",

           qt_configure_prefix_path_str + 12,

           qt_configure_libraries_path_str + 12,

           qt_configure_headers_path_str + 12);

    exit(0);

}

#endif