Adding qmake in preperation for new build system

1 files changed, 1955 insertions, 0 deletions

diff --git a/qmake/tools/qsettings.cpp b/qmake/tools/qsettings.cpp
new file mode 100644
index 0000000..5de105c
--- a/dev/null
+++ b/qmake/tools/qsettings.cpp
@@ -0,0 +1,1955 @@
+/****************************************************************************
+** $Id$
+**
+** Implementation of QSettings class
+**
+** Created: 2000.06.26
+**
+** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** as defined by Trolltech AS of Norway and appearing in the file
+** LICENSE.QPL included in the packaging of this file.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses may use this file in accordance with the Qt Commercial License
+** Agreement provided with the Software.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
+**   information about Qt Commercial License Agreements.
+** See http://www.trolltech.com/qpl/ for QPL licensing information.
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "qplatformdefs.h"
+
+// POSIX Large File Support redefines open -> open64
+static inline int qt_open( const char *pathname, int flags, mode_t mode )
+{ return ::open( pathname, flags, mode ); }
+#if defined(open)
+# undef open
+#endif
+
+// POSIX Large File Support redefines truncate -> truncate64
+#if defined(truncate)
+# undef truncate
+#endif
+
+#include "qsettings.h"
+
+#ifndef QT_NO_SETTINGS
+
+#include "qdir.h"
+#include "qfile.h"
+#include "qfileinfo.h"
+#include "qmap.h"
+#include "qtextstream.h"
+#include "qregexp.h"
+#include <private/qsettings_p.h>
+#include <errno.h>
+
+/*!
+  \class QSettings
+  \brief The QSettings class provides persistent platform-independent application settings.
+
+  \ingroup io
+  \ingroup misc
+  \mainclass
+
+  On Unix systems, QSettings uses text files to store settings. On Windows
+  systems, QSettings uses the system registry.  On Mac OS X, QSettings will
+  behave as on Unix, and store to text files.
+
+  Each setting comprises an identifying key and the data associated with
+  the key. A key is a unicode string which consists of \e two or more
+  subkeys. A subkey is a slash, '/', followed by one or more unicode
+  characters (excluding slashes, newlines, carriage returns and equals,
+  '=', signs). The associated data, called the entry or value, may be a
+  boolean, an integer, a double, a string or a list of strings. Entry
+  strings may contain any unicode characters.
+
+  If you want to save and restore the entire desktop's settings, i.e.
+  which applications are running, use QSettings to save the settings
+  for each individual application and QSessionManager to save the
+  desktop's session.
+
+    Example settings:
+    \code
+    /MyCompany/MyApplication/background color
+    /MyCompany/MyApplication/foreground color
+    /MyCompany/MyApplication/geometry/x
+    /MyCompany/MyApplication/geometry/y
+    /MyCompany/MyApplication/geometry/width
+    /MyCompany/MyApplication/geometry/height
+    /MyCompany/MyApplication/recent files/1
+    /MyCompany/MyApplication/recent files/2
+    /MyCompany/MyApplication/recent files/3
+    \endcode
+    Each line above is a complete key, made up of subkeys.
+
+    A typical usage pattern for application startup:
+    \code
+    QSettings settings;
+    settings.insertSearchPath( QSettings::Windows, "/MyCompany" );
+    // No search path needed for Unix; see notes further on.
+    // Use default values if the keys don't exist
+    QString bgColor = settings.readEntry( "/MyApplication/background color", "white" );
+    int width = settings.readNumEntry( "/MyApplication/geometry/width", 640 );
+    // ...
+    \endcode
+
+    A typical usage pattern for application exit or 'save preferences':
+    \code
+    QSettings settings;
+    settings.insertSearchPath( QSettings::Windows, "/MyCompany" );
+    // No search path needed for Unix; see notes further on.
+    settings.writeEntry( "/MyApplication/background color", bgColor );
+    settings.writeEntry( "/MyApplication/geometry/width", width );
+    // ...
+    \endcode
+
+    You can get a list of entry-holding keys by calling entryList(), and
+    a list of key-holding keys using subkeyList().
+
+    \code
+    QStringList keys = entryList( "/MyApplication" );
+    // keys contains 'background color' and 'foreground color'.
+
+    QStringList keys = entryList( "/MyApplication/recent files" );
+    // keys contains '1', '2' and '3'.
+
+    QStringList subkeys = subkeyList( "/MyApplication" );
+    // subkeys contains 'geometry' and 'recent files'
+
+    QStringList subkeys = subkeyList( "/MyApplication/recent files" );
+    // subkeys is empty.
+    \endcode
+
+    If you wish to use a different search path call insertSearchPath()
+    as often as necessary to add your preferred paths. Call
+    removeSearchPath() to remove any unwanted paths.
+
+    Since settings for Windows are stored in the registry there are size
+    limits as follows:
+    \list
+    \i A subkey may not exceed 255 characters.
+    \i An entry's value may not exceed 16,300 characters.
+    \i All the values of a key (for example, all the 'recent files'
+    subkeys values), may not exceed 65,535 characters.
+    \endlist
+
+    These limitations are not enforced on Unix.
+
+    \section1 Notes for Unix Applications
+
+    There is no universally accepted place for storing application
+    settings under Unix. In the examples the settings file will be
+    searched for in the following directories:
+    \list 1
+    \i INSTALL/etc/settings
+    \i /opt/MyCompany/share/etc
+    \i /opt/MyCompany/share/MyApplication/etc
+    \i $HOME/.qt
+    \endlist
+    When reading settings the files are searched in the order shown
+    above, with later settings overriding earlier settings. Files for
+    which the user doesn't have read permission are ignored. When saving
+    settings QSettings works in the order shown above, writing
+    to the first settings file for which the user has write permission.
+    (\c INSTALL is the directory where Qt was installed.  This can be
+    modified by using the configure script's -prefix argument )
+
+    If you want to put the settings in a particular place in the
+    filesystem you could do this:
+    \code
+    settings.insertSearchPath( QSettings::Unix, "/opt/MyCompany/share" );
+    \endcode
+
+    But in practice you may prefer not to use a search path for Unix.
+    For example the following code:
+    \code
+    settings.writeEntry( "/MyApplication/geometry/width", width );
+    \endcode
+    will end up writing the "geometry/width" setting to the file
+    \c{$HOME/.qt/myapplicationrc} (assuming that the application is
+    being run by an ordinary user, i.e. not by root).
+
+    For cross-platform applications you should ensure that the Windows
+    size limitations are not exceeded.
+*/
+
+/*!
+    \enum QSettings::System
+
+    \value Mac Macintosh execution environments
+    \value Unix Mac OS X, Unix, Linux and Unix-like execution environments
+    \value Windows Windows execution environments
+*/
+
+/*!
+    \enum QSettings::Format
+
+    \value Native Store the settings in a platform dependent location
+    \value Ini Store the settings in a text file
+*/
+
+/*!
+    \enum QSettings::Scope
+
+    \value Global Save settings as global as possible
+    \value User Save settings in user space
+*/
+
+#if defined(Q_OS_UNIX)
+typedef int HANDLE;
+#define Q_LOCKREAD F_RDLCK
+#define Q_LOCKWRITE F_WRLCK
+/*
+  Locks the file specified by name.  The lockfile is created as a
+  hidden file in the same directory as the target file, with .lock
+  appended to the name. For example, "/etc/settings/onerc" uses a
+  lockfile named "/etc/settings/.onerc.lock".  The type argument
+  controls the type of the lock, it can be either F_RDLCK for a read
+  lock, or F_WRLCK for a write lock.
+
+  A file descriptor for the lock file is returned, and should be
+  closed with closelock() when the lock is no longer needed.
+ */
+static HANDLE openlock( const QString &name, int type )
+{
+    QFileInfo info( name );
+    // lockfile should be hidden, and never removed
+    QString lockfile = info.dirPath() + "/." + info.fileName() + ".lock";
+
+    // open the lockfile
+    HANDLE fd = qt_open( QFile::encodeName( lockfile ),
+			 O_RDWR | O_CREAT, S_IRUSR | S_IWUSR );
+
+    if ( fd < 0 ) {
+ 	// failed to open the lock file, most likely because of permissions
+	return fd;
+    }
+
+    struct flock fl;
+    fl.l_type = type;
+    fl.l_whence = SEEK_SET;
+    fl.l_start = 0;
+    fl.l_len = 0;
+    if ( fcntl( fd, F_SETLKW, &fl ) == -1 ) {
+	// the lock failed, so we should fail silently, so that people
+	// using filesystems that do not support locking don't see
+	// numerous warnings about a failed lock
+	close( fd );
+	fd = -1;
+    }
+
+    return fd;
+}
+
+/*
+  Closes the lock file specified by fd.  fd is the file descriptor
+  returned by the openlock() function.
+*/
+static void closelock( HANDLE fd )
+{
+    if ( fd < 0 ) {
+	// the lock file is not open
+	return;
+    }
+
+    struct flock fl;
+    fl.l_type = F_UNLCK;
+    fl.l_whence = SEEK_SET;
+    fl.l_start = 0;
+    fl.l_len = 0;
+    // ignore the return value, so that the unlock fails silently
+    (void) fcntl( fd, F_SETLKW, &fl );
+
+    close( fd );
+}
+#elif defined(Q_WS_WIN)
+#define Q_LOCKREAD 1
+#define Q_LOCKWRITE 2
+
+static HANDLE openlock( const QString &name, int /*type*/ )
+{
+    if ( !QFile::exists( name ) )
+	return 0;
+
+    return 0;
+
+    HANDLE fd = 0;
+
+    QT_WA( {
+	fd = CreateFileW( (TCHAR*)name.ucs2(), GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
+    } , {
+	fd = CreateFileA( name.local8Bit(), GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
+    } );
+
+    if ( !LockFile( fd, 0, 0, -1, -1 ) ) {
+#ifdef QT_CHECK_STATE
+	qWarning( "QSettings: openlock failed!" );
+#endif
+    }
+    return fd;
+}
+
+void closelock( HANDLE fd )
+{
+    if ( !fd )
+	return;
+
+    if ( !UnlockFile( fd, 0, 0, -1, -1 ) ) {
+#ifdef QT_CHECK_STATE
+	qWarning( "QSettings: closelock failed!");
+#endif
+    }
+    CloseHandle( fd );
+}
+#endif
+
+
+QSettingsGroup::QSettingsGroup()
+    : modified(FALSE)
+{
+}
+
+
+
+
+void QSettingsHeading::read(const QString &filename)
+{
+    if (! QFileInfo(filename).exists())
+	return;
+
+    HANDLE lockfd = openlock( filename, Q_LOCKREAD );
+
+    QFile file(filename);
+    if (! file.open(IO_ReadOnly)) {
+#if defined(QT_CHECK_STATE)
+	qWarning("QSettings: failed to open file '%s'", filename.latin1());
+#endif
+	return;
+    }
+
+    git = end();
+
+    QTextStream stream(&file);
+    stream.setEncoding(QTextStream::UnicodeUTF8);
+    while (! stream.atEnd())
+	parseLine(stream);
+
+    git = end();
+
+    file.close();
+
+    closelock( lockfd );
+}
+
+
+void QSettingsHeading::parseLine(QTextStream &stream)
+{
+    QString line = stream.readLine();
+    if (line.isEmpty())
+	// empty line... we'll allow it
+	return;
+
+    if (line[0] == QChar('#'))
+	// commented line
+	return;
+
+    if (line[0] == QChar('[')) {
+	QString gname = line;
+
+	gname = gname.remove(0, 1);
+	if (gname[(int)gname.length() - 1] == QChar(']'))
+	    gname = gname.remove(gname.length() - 1, 1);
+
+	git = find(gname);
+	if (git == end())
+	    git = replace(gname, QSettingsGroup());
+    } else {
+	if (git == end()) {
+#if defined(QT_CHECK_STATE)
+	    qWarning("QSettings: line '%s' out of group", line.latin1());
+#endif
+	    return;
+	}
+
+	int i = line.find('=');
+       	if (i == -1) {
+#if defined(QT_CHECK_STATE)
+	    qWarning("QSettings: malformed line '%s' in group '%s'",
+		     line.latin1(), git.key().latin1());
+#endif
+	    return;
+	} else {
+	    QString key, value;
+	    key = line.left(i);
+	    value = "";
+	    bool esc=TRUE;
+	    i++;
+	    while (esc) {
+		esc = FALSE;
+		for ( ; i < (int)line.length(); i++ ) {
+		    if ( esc ) {
+			if ( line[i] == 'n' )
+			    value.append('\n'); // escaped newline
+			else if ( line[i] == '0' )
+			    value = QString::null; // escaped empty string
+			else
+			    value.append(line[i]);
+			esc = FALSE;
+		    } else if ( line[i] == '\\' )
+			esc = TRUE;
+		    else
+			value.append(line[i]);
+		}
+		if ( esc ) {
+		    // Backwards-compatiblity...
+		    // still escaped at EOL - manually escaped "newline"
+		    if (stream.atEnd()) {
+#if defined(QT_CHECK_STATE)
+			qWarning("QSettings: reached end of file, expected continued line");
+#endif
+			break;
+		    }
+		    value.append('\n');
+		    line = stream.readLine();
+		    i = 0;
+		}
+	    }
+
+	    (*git).insert(key, value);
+	}
+    }
+}
+
+#ifdef Q_WS_WIN // for homedirpath reading from registry
+#include "qt_windows.h"
+#include "qlibrary.h"
+
+#ifndef CSIDL_APPDATA
+#define CSIDL_APPDATA                   0x001a        // <user name>\Application Data
+#endif
+#ifndef CSIDL_COMMON_APPDATA
+#define CSIDL_COMMON_APPDATA            0x0023        // All Users\Application Data
+#endif
+
+#endif
+
+QSettingsPrivate::QSettingsPrivate( QSettings::Format format )
+    : groupDirty( TRUE ), modified(FALSE), globalScope(TRUE)
+{
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( format != QSettings::Ini )
+	return;
+#endif
+
+    QString appSettings(QDir::homeDirPath() + "/.qt/");
+    QString defPath;
+#ifdef Q_WS_WIN
+#ifdef Q_OS_TEMP
+	TCHAR path[MAX_PATH];
+	SHGetSpecialFolderPath( 0, path, CSIDL_APPDATA, FALSE );
+	appSettings  = QString::fromUcs2( path );
+	SHGetSpecialFolderPath( 0, path, CSIDL_COMMON_APPDATA, FALSE );
+	defPath = QString::fromUcs2( path );
+#else
+    QLibrary library( "shell32" );
+    library.setAutoUnload( FALSE );
+    QT_WA( {
+	typedef BOOL (WINAPI*GetSpecialFolderPath)(HWND, LPTSTR, int, BOOL);
+	GetSpecialFolderPath SHGetSpecialFolderPath = (GetSpecialFolderPath)library.resolve( "SHGetSpecialFolderPathW" );
+	if ( SHGetSpecialFolderPath ) {
+	    TCHAR path[MAX_PATH];
+	    SHGetSpecialFolderPath( 0, path, CSIDL_APPDATA, FALSE );
+	    appSettings  = QString::fromUcs2( (ushort*)path );
+	    SHGetSpecialFolderPath( 0, path, CSIDL_COMMON_APPDATA, FALSE );
+	    defPath = QString::fromUcs2( (ushort*)path );
+	}
+    } , {
+	typedef BOOL (WINAPI*GetSpecialFolderPath)(HWND, char*, int, BOOL);
+	GetSpecialFolderPath SHGetSpecialFolderPath = (GetSpecialFolderPath)library.resolve( "SHGetSpecialFolderPathA" );
+	if ( SHGetSpecialFolderPath ) {
+	    char path[MAX_PATH];
+	    SHGetSpecialFolderPath( 0, path, CSIDL_APPDATA, FALSE );
+	    appSettings = QString::fromLocal8Bit( path );
+	    SHGetSpecialFolderPath( 0, path, CSIDL_COMMON_APPDATA, FALSE );
+	    defPath = QString::fromLocal8Bit( path );
+	}
+    } );
+#endif // Q_OS_TEMP
+#else
+// for now
+#define QSETTINGS_DEFAULT_PATH_SUFFIX "/etc/settings"
+
+    defPath = qInstallPath();
+    defPath += QSETTINGS_DEFAULT_PATH_SUFFIX;
+#endif
+    QDir dir(appSettings);
+    if (! dir.exists()) {
+	if (! dir.mkdir(dir.path()))
+#if defined(QT_CHECK_STATE)
+	    qWarning("QSettings: error creating %s", dir.path().latin1());
+#endif
+    }
+
+    if ( !!defPath )
+	searchPaths.append(defPath);
+    searchPaths.append(dir.path());
+}
+
+QSettingsPrivate::~QSettingsPrivate()
+{
+}
+
+QSettingsGroup QSettingsPrivate::readGroup()
+{
+    QSettingsHeading hd;
+    QSettingsGroup grp;
+
+    QMap<QString,QSettingsHeading>::Iterator headingsit = headings.find(heading);
+    if (headingsit != headings.end())
+	hd = *headingsit;
+
+    QSettingsHeading::Iterator grpit = hd.find(group);
+    if (grpit == hd.end()) {
+	QStringList::Iterator it = searchPaths.begin();
+	while (it != searchPaths.end()) {
+	    QString filebase = heading.lower().replace(QRegExp("\\s+"), "_");
+	    QString fn((*it++) + "/" + filebase + "rc");
+	    if (! hd.contains(fn + "cached")) {
+		hd.read(fn);
+		hd.insert(fn + "cached", QSettingsGroup());
+	    }
+	}
+
+	headings.replace(heading, hd);
+
+	grpit = hd.find(group);
+	if (grpit != hd.end())
+	    grp = *grpit;
+    } else if (hd.count() != 0)
+	grp = *grpit;
+
+    return grp;
+}
+
+
+void QSettingsPrivate::removeGroup(const QString &key)
+{
+    QSettingsHeading hd;
+    QSettingsGroup grp;
+    bool found = FALSE;
+
+    QMap<QString,QSettingsHeading>::Iterator headingsit = headings.find(heading);
+    if (headingsit != headings.end())
+	hd = *headingsit;
+
+    QSettingsHeading::Iterator grpit = hd.find(group);
+    if (grpit == hd.end()) {
+	QStringList::Iterator it = searchPaths.begin();
+	while (it != searchPaths.end()) {
+	    QString filebase = heading.lower().replace(QRegExp("\\s+"), "_");
+	    QString fn((*it++) + "/" + filebase + "rc");
+	    if (! hd.contains(fn + "cached")) {
+		hd.read(fn);
+		hd.insert(fn + "cached", QSettingsGroup());
+	    }
+	}
+
+	headings.replace(heading, hd);
+
+	grpit = hd.find(group);
+	if (grpit != hd.end()) {
+	    found = TRUE;
+	    grp = *grpit;
+	}
+    } else if (hd.count() != 0) {
+	found = TRUE;
+	grp = *grpit;
+    }
+
+    if (found) {
+	grp.remove(key);
+
+	if (grp.count() > 0)
+	    hd.replace(group, grp);
+	else
+	    hd.remove(group);
+
+	if (hd.count() > 0)
+	    headings.replace(heading, hd);
+	else
+	    headings.remove(heading);
+
+	modified = TRUE;
+    }
+}
+
+
+void QSettingsPrivate::writeGroup(const QString &key, const QString &value)
+{
+    QSettingsHeading hd;
+    QSettingsGroup grp;
+
+    QMap<QString,QSettingsHeading>::Iterator headingsit = headings.find(heading);
+    if (headingsit != headings.end())
+	hd = *headingsit;
+
+    QSettingsHeading::Iterator grpit = hd.find(group);
+    if (grpit == hd.end()) {
+	QStringList::Iterator it = searchPaths.begin();
+	while (it != searchPaths.end()) {
+	    QString filebase = heading.lower().replace(QRegExp("\\s+"), "_");
+	    QString fn((*it++) + "/" + filebase + "rc");
+	    if (! hd.contains(fn + "cached")) {
+		hd.read(fn);
+		hd.insert(fn + "cached", QSettingsGroup());
+	    }
+	}
+
+	headings.replace(heading, hd);
+
+	grpit = hd.find(group);
+	if (grpit != hd.end())
+	    grp = *grpit;
+    } else if (hd.count() != 0)
+	grp = *grpit;
+
+    grp.modified = TRUE;
+    grp.replace(key, value);
+    hd.replace(group, grp);
+    headings.replace(heading, hd);
+
+    modified = TRUE;
+}
+
+
+QDateTime QSettingsPrivate::modificationTime()
+{
+    QSettingsHeading hd = headings[heading];
+    QSettingsGroup grp = hd[group];
+
+    QDateTime datetime;
+
+    QStringList::Iterator it = searchPaths.begin();
+    while (it != searchPaths.end()) {
+	QFileInfo fi((*it++) + "/" + heading + "rc");
+	if (fi.exists() && fi.lastModified() > datetime)
+	    datetime = fi.lastModified();
+    }
+
+    return datetime;
+}
+
+static bool verifyKey( const QString &key )
+{
+    if ( key.isEmpty() || key[0] != '/' || key.contains( QRegExp("[=\\\\r\\\\n" ) ) )
+	return FALSE;
+    return TRUE;
+}
+
+static inline QString groupKey( const QString &group, const QString &key )
+{
+    if ( group.endsWith( "/" ) || key.startsWith( "/" ) )
+	return group + key;
+    return group + "/" + key;
+}
+
+/*!
+  Inserts \a path into the settings search path. The semantics of \a
+  path depends on the system \a s.
+
+  When \a s is \e Windows and the execution environment is \e not
+  Windows the function does nothing. Similarly when \a s is \e Unix and
+  the execution environment is \e not Unix the function does nothing.
+
+  When \a s is \e Windows, and the execution environment is Windows, the
+  search path list will be used as the first subfolder of the "Software"
+  folder in the registry.
+
+  When reading settings the folders are searched forwards from the
+  first folder (listed below) to the last, returning the first
+  settings found, and ignoring any folders for which the user doesn't 
+  have read permission.
+  \list 1
+  \i HKEY_CURRENT_USER/Software/MyCompany/MyApplication
+  \i HKEY_LOCAL_MACHINE/Software/MyCompany/MyApplication
+  \i HKEY_CURRENT_USER/Software/MyApplication
+  \i HKEY_LOCAL_MACHINE/Software/MyApplication
+  \endlist
+
+  \code
+  QSettings settings;
+  settings.insertSearchPath( QSettings::Windows, "/MyCompany" );
+  settings.writeEntry( "/MyApplication/Tip of the day", TRUE );
+  \endcode
+  The code above will write the subkey "Tip of the day" into the \e
+  first of the registry folders listed below that is found and for
+  which the user has write permission.
+  \list 1
+  \i HKEY_LOCAL_MACHINE/Software/MyCompany/MyApplication
+  \i HKEY_CURRENT_USER/Software/MyCompany/MyApplication
+  \i HKEY_LOCAL_MACHINE/Software/MyApplication
+  \i HKEY_CURRENT_USER/Software/MyApplication
+  \endlist
+  If a setting is found in the HKEY_CURRENT_USER space, this setting
+  is overwritten independently of write permissions in the 
+  HKEY_LOCAL_MACHINE space.
+
+  When \a s is \e Unix, and the execution environment is Unix, the
+  search path list will be used when trying to determine a suitable
+  filename for reading and writing settings files. By default, there are
+  two entries in the search path:
+
+  \list 1
+  \i INSTALL/etc - where \c INSTALL is the directory where Qt was installed.
+  \i $HOME/.qt/ - where \c $HOME is the user's home directory.
+  \endlist
+
+  All insertions into the search path will go before $HOME/.qt/.
+  For example:
+  \code
+  QSettings settings;
+  settings.insertSearchPath( QSettings::Unix, "/opt/MyCompany/share/etc" );
+  settings.insertSearchPath( QSettings::Unix, "/opt/MyCompany/share/MyApplication/etc" );
+  // ...
+  \endcode
+  Will result in a search path of:
+  \list 1
+  \i INSTALL/etc
+  \i /opt/MyCompany/share/etc
+  \i /opt/MyCompany/share/MyApplication/etc
+  \i $HOME/.qt
+  \endlist
+    When reading settings the files are searched in the order shown
+    above, with later settings overriding earlier settings. Files for
+    which the user doesn't have read permission are ignored. When saving
+    settings QSettings works in the order shown above, writing
+    to the first settings file for which the user has write permission.
+
+  Settings under Unix are stored in files whose names are based on the
+  first subkey of the key (not including the search path). The algorithm
+  for creating names is essentially: lowercase the first subkey, replace
+  spaces with underscores and add 'rc', e.g.
+  <tt>/MyCompany/MyApplication/background color</tt> will be stored in
+  <tt>myapplicationrc</tt> (assuming that <tt>/MyCompany</tt> is part of
+  the search path).
+
+  \sa removeSearchPath()
+
+*/
+void QSettings::insertSearchPath( System s, const QString &path)
+{
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd ) {
+	d->sysInsertSearchPath( s, path );
+	return;
+    }
+#endif
+
+    if ( !verifyKey( path ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::insertSearchPath: Invalid key: '%s'", path.isNull() ? "(null)" : path.latin1() );
+#endif
+	return;
+    }
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd && s != Unix ) {
+#else
+    if ( s != Unix ) {
+#endif
+#ifdef Q_OS_MAC
+	if(s != Mac) //mac is respected on the mac as well
+#endif
+	    return;
+    }
+
+    QStringList::Iterator it = d->searchPaths.find(d->searchPaths.last());
+    if (it != d->searchPaths.end()) {
+	d->searchPaths.insert(it, path);
+    }
+}
+
+
+/*!
+  Removes all occurrences of \a path (using exact matching) from the
+  settings search path for system \a s. Note that the default search
+  paths cannot be removed.
+
+  \sa insertSearchPath()
+*/
+void QSettings::removeSearchPath( System s, const QString &path)
+{
+    if ( !verifyKey( path ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::insertSearchPath: Invalid key: '%s'", path.isNull() ? "(null)" : path.latin1() );
+#endif
+	return;
+    }
+
+#ifdef Q_WS_WIN
+    if ( d->sysd ) {
+	d->sysRemoveSearchPath( s, path );
+	return;
+    }
+#endif
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd && s != Unix ) {
+#else
+    if ( s != Unix ) {
+#endif
+#ifdef Q_OS_MAC
+	if(s != Mac) //mac is respected on the mac as well
+#endif
+	    return;
+    }
+
+    if (path == d->searchPaths.first() || path == d->searchPaths.last())
+	return;
+
+    d->searchPaths.remove(path);
+}
+
+
+/*!
+  Creates a settings object.
+*/
+QSettings::QSettings()
+{
+    d = new QSettingsPrivate( Native );
+    Q_CHECK_PTR(d);
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    d->sysd = 0;
+    d->sysInit();
+#endif
+}
+
+/*!
+  Creates a settings object. If \a format is 'Ini' the settings will
+  be stored in a text file, using the Unix strategy (see above). If \a format
+  is 'Native', the settings will be stored in a platform specific way
+  (ie. the Windows registry).
+*/
+QSettings::QSettings( Format format )
+{
+    d = new QSettingsPrivate( format );
+    Q_CHECK_PTR(d);
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    d->sysd = 0;
+    if ( format == Native )
+	d->sysInit();
+#else
+    Q_UNUSED(format);
+#endif
+}
+
+/*!
+  Destroys the settings object.  All modifications made to the settings
+  will automatically be saved.
+
+*/
+QSettings::~QSettings()
+{
+    sync();
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	d->sysClear();
+#endif
+
+    delete d;
+}
+
+
+/*! \internal
+  Writes all modifications to the settings to disk.  If any errors are
+  encountered, this function returns FALSE, otherwise it will return TRUE.
+*/
+bool QSettings::sync()
+{
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysSync();
+#endif
+    if (! d->modified)
+	// fake success
+	return TRUE;
+
+    bool success = TRUE;
+    QMap<QString,QSettingsHeading>::Iterator it = d->headings.begin();
+
+    while (it != d->headings.end()) {
+	// determine filename
+	QSettingsHeading hd(*it);
+	QSettingsHeading::Iterator hdit = hd.begin();
+	QFile file;
+
+	QStringList::Iterator pit = d->searchPaths.begin();
+	while (pit != d->searchPaths.end()) {
+	    QString filebase = it.key().lower().replace(QRegExp("\\s+"), "_");
+	    QFileInfo di(*pit);
+	    QFileInfo fi((*pit++) + "/" + filebase + "rc");
+
+	    if ((fi.exists() && fi.isFile() && fi.isWritable()) ||
+		(! fi.exists() && di.isDir() && di.isWritable())) {
+		file.setName(fi.filePath());
+		break;
+	    }
+	}
+
+	it++;
+
+	if (file.name().isNull() || file.name().isEmpty()) {
+
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::sync: filename is null/empty");
+#endif // QT_CHECK_STATE
+
+	    success = FALSE;
+	    continue;
+	}
+
+	HANDLE lockfd = openlock( file.name(), Q_LOCKWRITE );
+
+	if (! file.open(IO_WriteOnly)) {
+
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::sync: failed to open '%s' for writing",
+		     file.name().latin1());
+#endif // QT_CHECK_STATE
+
+	    success = FALSE;
+	    continue;
+	}
+
+	// spew to file
+	QTextStream stream(&file);
+	stream.setEncoding(QTextStream::UnicodeUTF8);
+
+	while (hdit != hd.end()) {
+	    if ((*hdit).count() > 0) {
+		stream << "[" << hdit.key() << "]" << endl;
+
+		QSettingsGroup grp(*hdit);
+		QSettingsGroup::Iterator grpit = grp.begin();
+
+		while (grpit != grp.end()) {
+		    QString v = grpit.data();
+		    if ( v.isNull() ) {
+			v = "\\0"; // escape null string
+		    } else {
+			v.replace("\\", "\\\\"); // escape backslash
+			v.replace("\n", "\\n"); // escape newlines
+		    }
+
+		    stream << grpit.key() << "=" << v << endl;
+		    grpit++;
+		}
+
+		stream << endl;
+	    }
+
+	    hdit++;
+	}
+
+	if (file.status() != IO_Ok) {
+
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::sync: error at end of write");
+#endif // QT_CHECK_STATE
+
+	    success = FALSE;
+	}
+
+	file.close();
+
+	closelock( lockfd );
+    }
+
+    d->modified = FALSE;
+
+    return success;
+}
+
+
+/*!
+  \fn bool QSettings::readBoolEntry(const QString &key, bool def, bool *ok ) const
+
+  Reads the entry specified by \a key, and returns a bool, or the
+  default value, \a def, if the entry couldn't be read.
+  If \a ok is non-null, *ok is set to TRUE if the key was read, FALSE
+  otherwise.
+
+  \sa readEntry(), readNumEntry(), readDoubleEntry(), writeEntry(), removeEntry()
+*/
+
+/*!
+    \internal
+*/
+bool QSettings::readBoolEntry(const QString &key, bool def, bool *ok )
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::readBoolEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+    	if ( ok )
+	    *ok = FALSE;
+
+	return def;
+    }
+
+    QString theKey = groupKey( group(), key );
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysReadBoolEntry( theKey, def, ok );
+#endif
+
+    QString value = readEntry( theKey, ( def ? "true" : "false" ), ok );
+
+    if (value.lower() == "true")
+	return TRUE;
+    else if (value.lower() == "false")
+	return FALSE;
+    else if (value == "1")
+	return TRUE;
+    else if (value == "0")
+	return FALSE;
+
+    if (! value.isEmpty())
+	qWarning("QSettings::readBoolEntry: '%s' is not 'true' or 'false'",
+		 value.latin1());
+    if ( ok )
+	*ok = FALSE;
+    return def;
+}
+
+
+/*!
+    \fn double QSettings::readDoubleEntry(const QString &key, double def, bool *ok ) const
+
+  Reads the entry specified by \a key, and returns a double, or the
+  default value, \a def, if the entry couldn't be read.
+  If \a ok is non-null, *ok is set to TRUE if the key was read, FALSE
+  otherwise.
+
+  \sa readEntry(), readNumEntry(), readBoolEntry(), writeEntry(), removeEntry()
+*/
+
+/*!
+    \internal
+*/
+double QSettings::readDoubleEntry(const QString &key, double def, bool *ok )
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::readDoubleEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+    	if ( ok )
+	    *ok = FALSE;
+
+	return def;
+    }
+
+    QString theKey = groupKey( group(), key );
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysReadDoubleEntry( theKey, def, ok );
+#endif
+
+    QString value = readEntry( theKey, QString::number(def), ok );
+    bool conv_ok;
+    double retval = value.toDouble( &conv_ok );
+    if ( conv_ok )
+	return retval;
+    if ( ! value.isEmpty() )
+	qWarning( "QSettings::readDoubleEntry: '%s' is not a number",
+		  value.latin1() );
+    if ( ok )
+	*ok = FALSE;
+    return def;
+}
+
+
+/*!
+    \fn int QSettings::readNumEntry(const QString &key, int def, bool *ok ) const
+
+  Reads the entry specified by \a key, and returns an integer, or the
+  default value, \a def, if the entry couldn't be read.
+  If \a ok is non-null, *ok is set to TRUE if the key was read, FALSE
+  otherwise.
+
+  \sa readEntry(), readDoubleEntry(), readBoolEntry(), writeEntry(), removeEntry()
+*/
+
+/*!
+    \internal
+*/
+int QSettings::readNumEntry(const QString &key, int def, bool *ok )
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::readNumEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	if ( ok )
+	    *ok = FALSE;
+	return def;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysReadNumEntry( theKey, def, ok );
+#endif
+
+    QString value = readEntry( theKey, QString::number( def ), ok );
+    bool conv_ok;
+    int retval = value.toInt( &conv_ok );
+    if ( conv_ok )
+	return retval;
+    if ( ! value.isEmpty() )
+	qWarning( "QSettings::readNumEntry: '%s' is not a number",
+		  value.latin1() );
+    if ( ok )
+	*ok = FALSE;
+    return def;
+}
+
+
+/*!
+    \fn QString QSettings::readEntry(const QString &key, const QString &def, bool *ok ) const
+
+  Reads the entry specified by \a key, and returns a QString, or the
+  default value, \a def, if the entry couldn't be read.
+  If \a ok is non-null, *ok is set to TRUE if the key was read, FALSE
+  otherwise.
+
+  \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), writeEntry(), removeEntry()
+*/
+
+/*!
+    \internal
+*/
+QString QSettings::readEntry(const QString &key, const QString &def, bool *ok )
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::readEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	if ( ok )
+	    *ok = FALSE;
+
+	return def;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysReadEntry( theKey, def, ok );
+#endif
+
+    if ( ok ) // no, everything is not ok
+	*ok = FALSE;
+
+    QString realkey;
+
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 2) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::readEntry: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+	    if ( ok )
+		*ok = FALSE;
+	    return def;
+	}
+
+	if (list.count() == 2) {
+	    d->heading = list[0];
+	    d->group = "General";
+	    realkey = list[1];
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+
+	    // remove the group from the list
+	    list.remove(list.at(1));
+	    // remove the heading from the list
+	    list.remove(list.at(0));
+
+	    realkey = list.join("/");
+	}
+    } else
+    	realkey = theKey;
+
+    QSettingsGroup grp = d->readGroup();
+    QString retval = grp[realkey];
+    if ( retval.isNull() )
+	retval = def;
+    else if ( ok ) // everything is ok
+	*ok = TRUE;
+    return retval;
+}
+
+
+#if !defined(Q_NO_BOOL_TYPE)
+/*!
+    Writes the boolean entry \a value into key \a key. The \a key is
+    created if it doesn't exist. Any previous value is overwritten by \a
+    value.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise TRUE is returned.
+
+  \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, bool value)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::writeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysWriteEntry( theKey, value );
+#endif
+    QString s(value ? "true" : "false");
+    return writeEntry(theKey, s);
+}
+#endif
+
+
+/*!
+    \overload
+    Writes the double entry \a value into key \a key. The \a key is
+    created if it doesn't exist. Any previous value is overwritten by \a
+    value.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise TRUE is returned.
+
+  \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, double value)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::writeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysWriteEntry( theKey, value );
+#endif
+    QString s(QString::number(value));
+    return writeEntry(theKey, s);
+}
+
+
+/*!
+    \overload
+    Writes the integer entry \a value into key \a key. The \a key is
+    created if it doesn't exist. Any previous value is overwritten by \a
+    value.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise TRUE is returned.
+
+  \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, int value)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::writeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysWriteEntry( theKey, value );
+#endif
+    QString s(QString::number(value));
+    return writeEntry(theKey, s);
+}
+
+
+/*!
+    \internal
+
+  Writes the entry specified by \a key with the string-literal \a value,
+  replacing any previous setting.  If \a value is zero-length or null, the
+  entry is replaced by an empty setting.
+
+  \e NOTE: This function is provided because some compilers use the
+  writeEntry (const QString &, bool) overload for this code:
+  writeEntry ("/foo/bar", "baz")
+
+  If an error occurs, this functions returns FALSE and the object is left
+  unchanged.
+
+  \sa readEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, const char *value)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::writeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+    return writeEntry(theKey, QString(value));
+}
+
+
+/*!
+    \overload
+    Writes the string entry \a value into key \a key. The \a key is
+    created if it doesn't exist. Any previous value is overwritten by \a
+    value. If \a value is an empty string or a null string the key's
+    value will be an empty string.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise TRUE is returned.
+
+  \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, const QString &value)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::writeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysWriteEntry( theKey, value );
+#endif
+    // NOTE: we *do* allow value to be a null/empty string
+
+    QString realkey;
+
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 2) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::writeEntry: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+
+	    return FALSE;
+	}
+
+	if (list.count() == 2) {
+	    d->heading = list[0];
+	    d->group = "General";
+	    realkey = list[1];
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+
+	    // remove the group from the list
+	    list.remove(list.at(1));
+	    // remove the heading from the list
+	    list.remove(list.at(0));
+
+	    realkey = list.join("/");
+	}
+    } else
+	realkey = theKey;
+
+    d->writeGroup(realkey, value);
+    return TRUE;
+}
+
+
+/*!
+  Removes the entry specified by \a key.
+
+    Returns TRUE if the entry existed and was removed; otherwise returns FALSE.
+
+  \sa readEntry(), writeEntry()
+*/
+bool QSettings::removeEntry(const QString &key)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::removeEntry: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return FALSE;
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysRemoveEntry( theKey );
+#endif
+
+    QString realkey;
+
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 2) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::removeEntry: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+
+	    return FALSE;
+	}
+
+	if (list.count() == 2) {
+	    d->heading = list[0];
+	    d->group = "General";
+	    realkey = list[1];
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+
+	    // remove the group from the list
+	    list.remove(list.at(1));
+	    // remove the heading from the list
+	    list.remove(list.at(0));
+
+	    realkey = list.join("/");
+	}
+    } else
+	realkey = theKey;
+
+    d->removeGroup(realkey);
+    return TRUE;
+}
+
+
+/*!
+  Returns a list of the keys which contain entries under \a key. Does \e
+  not return any keys that contain keys.
+
+    Example settings:
+    \code
+    /MyCompany/MyApplication/background color
+    /MyCompany/MyApplication/foreground color
+    /MyCompany/MyApplication/geometry/x
+    /MyCompany/MyApplication/geometry/y
+    /MyCompany/MyApplication/geometry/width
+    /MyCompany/MyApplication/geometry/height
+    \endcode
+    \code
+    QStringList keys = entryList( "/MyCompany/MyApplication" );
+    \endcode
+    \c keys contains 'background color' and 'foreground color'. It does
+    not contain 'geometry' because this key contains keys not entries.
+
+    To access the geometry values could either use subkeyList() to read
+    the keys and then read each entry, or simply read each entry
+    directly by specifying its full key, e.g.
+    "/MyCompany/MyApplication/geometry/y".
+
+  \sa subkeyList()
+*/
+QStringList QSettings::entryList(const QString &key) const
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::entryList: Invalid key: %s", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return QStringList();
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysEntryList( theKey );
+#endif
+
+    QString realkey;
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 1) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::listEntries: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+
+	    return QStringList();
+	}
+
+	if (list.count() == 1) {
+	    d->heading = list[0];
+	    d->group = "General";
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+
+	    // remove the group from the list
+	    list.remove(list.at(1));
+	    // remove the heading from the list
+	    list.remove(list.at(0));
+
+	    realkey = list.join("/");
+	}
+    } else
+	realkey = theKey;
+
+    QSettingsGroup grp = d->readGroup();
+    QSettingsGroup::Iterator it = grp.begin();
+    QStringList ret;
+    QString itkey;
+    while (it != grp.end()) {
+	itkey = it.key();
+	it++;
+
+	if ( realkey.length() > 0 ) {
+	    if ( itkey.left( realkey.length() ) != realkey )
+		continue;
+	    else
+		itkey.remove( 0, realkey.length() + 1 );
+	}
+
+	if ( itkey.find( '/' ) != -1 )
+	    continue;
+
+	ret << itkey;
+    }
+
+    return ret;
+}
+
+
+/*!
+  Returns a list of the keys which contain keys under \a key. Does \e
+  not return any keys that contain entries.
+
+    Example settings:
+    \code
+    /MyCompany/MyApplication/background color
+    /MyCompany/MyApplication/foreground color
+    /MyCompany/MyApplication/geometry/x
+    /MyCompany/MyApplication/geometry/y
+    /MyCompany/MyApplication/geometry/width
+    /MyCompany/MyApplication/geometry/height
+    /MyCompany/MyApplication/recent files/1
+    /MyCompany/MyApplication/recent files/2
+    /MyCompany/MyApplication/recent files/3
+    \endcode
+    \code
+    QStringList keys = subkeyList( "/MyCompany/MyApplication" );
+    \endcode
+    \c keys contains 'geometry' and 'recent files'. It does not contain
+    'background color' or 'foreground color' because they are keys which
+    contain entries not keys. To get a list of keys that have values
+    rather than subkeys use entryList().
+
+  \sa entryList()
+*/
+QStringList QSettings::subkeyList(const QString &key) const
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::subkeyList: Invalid key: %s", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return QStringList();
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return d->sysSubkeyList( theKey );
+#endif
+
+    QString realkey;
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 1) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::subkeyList: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+
+	    return QStringList();
+	}
+
+	if (list.count() == 1) {
+	    d->heading = list[0];
+	    d->group = "General";
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+
+	    // remove the group from the list
+	    list.remove(list.at(1));
+	    // remove the heading from the list
+	    list.remove(list.at(0));
+
+	    realkey = list.join("/");
+	}
+    } else
+	realkey = theKey;
+
+    QSettingsGroup grp = d->readGroup();
+    QSettingsGroup::Iterator it = grp.begin();
+    QStringList ret;
+    QString itkey;
+    while (it != grp.end()) {
+	itkey = it.key();
+	it++;
+
+	if ( realkey.length() > 0 ) {
+	    if ( itkey.left( realkey.length() ) != realkey )
+		continue;
+	    else
+		itkey.remove( 0, realkey.length() + 1 );
+	}
+
+	int slash = itkey.find( '/' );
+	if ( slash == -1 )
+	    continue;
+	itkey.truncate( slash );
+
+	if ( ! ret.contains( itkey ) )
+	    ret << itkey;
+    }
+
+    return ret;
+}
+
+
+/*!
+    \internal
+
+  This function returns the time of last modification for \a key.
+*/
+QDateTime QSettings::lastModficationTime(const QString &key)
+{
+    if ( !verifyKey( key ) ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "QSettings::lastModficationTime: Invalid key: '%s'", key.isNull() ? "(null)" : key.latin1() );
+#endif
+	return QDateTime();
+    }
+
+    QString theKey = groupKey( group(), key );
+
+#if defined(Q_WS_WIN) || defined(Q_OS_MAC)
+    if ( d->sysd )
+	return QDateTime();
+#endif
+
+    if (theKey[0] == '/') {
+	// parse our key
+	QStringList list(QStringList::split('/', theKey));
+
+	if (list.count() < 2) {
+#ifdef QT_CHECK_STATE
+	    qWarning("QSettings::lastModficationTime: invalid key '%s'", theKey.latin1());
+#endif // QT_CHECK_STATE
+
+	    return QDateTime();
+	}
+
+	if (list.count() == 2) {
+	    d->heading = list[0];
+	    d->group = "General";
+	} else {
+	    d->heading = list[0];
+	    d->group = list[1];
+	}
+    }
+
+    return d->modificationTime();
+}
+
+
+/*!
+    \overload
+
+    Writes the string list entry \a value into key \a key. The \a key
+    is created if it doesn't exist. Any previous value is overwritten
+    by \a value. The list is stored as a sequence of strings separated
+    by \a separator, so none of the strings in the list should contain
+    the separator. If the list is empty or null the key's value will
+    be an empty string.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise returns TRUE.
+
+    \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, const QStringList &value,
+			   const QChar &separator)
+{
+    QString s(value.join(separator));
+    return writeEntry(key, s);
+}
+
+/*!
+    \overload
+
+    Writes the string list entry \a value into key \a key. The \a key
+    is created if it doesn't exist. Any previous value is overwritten
+    by \a value.
+
+    If an error occurs the settings are left unchanged and FALSE is
+    returned; otherwise returns TRUE.
+
+    \sa readListEntry(), readNumEntry(), readDoubleEntry(), readBoolEntry(), removeEntry()
+*/
+bool QSettings::writeEntry(const QString &key, const QStringList &value)
+{
+    QString s;
+    for (QStringList::ConstIterator it=value.begin(); it!=value.end(); ++it) {
+	QString el = *it;
+	if ( el.isNull() ) {
+	    el = "^0";
+	} else {
+	    el.replace("^", "^^");
+	}
+	s+=el;
+	s+="^e"; // end of element
+    }
+    return writeEntry(key, s);
+}
+
+
+/*!
+    \overload QStringList QSettings::readListEntry(const QString &key, const QChar &separator, bool *ok ) const
+
+    Reads the entry specified by \a key as a string. The \a separator
+    is used to create a QStringList by calling QStringList::split(\a
+    separator, entry). If \a ok is not 0: \a *ok is set to TRUE if the
+    key was read, otherwise \a *ok is set to FALSE.
+
+    Note that if you want to iterate over the list, you should iterate
+    over a copy, e.g.
+    \code
+    QStringList list = mySettings.readListEntry( "size", " " );
+    QStringList::Iterator it = list.begin();
+    while( it != list.end() ) {
+	myProcessing( *it );
+	++it;
+    }
+    \endcode
+
+    \sa readEntry(), readDoubleEntry(), readBoolEntry(), writeEntry(), removeEntry(), QStringList::split()
+*/
+
+/*!
+    \internal
+*/
+QStringList QSettings::readListEntry(const QString &key, const QChar &separator, bool *ok )
+{
+    QString value = readEntry( key, QString::null, ok );
+    if ( ok && !*ok )
+	return QStringList();
+
+    return QStringList::split(separator, value);
+}
+
+/*!
+    \fn QStringList QSettings::readListEntry(const QString &key, bool *ok ) const
+    Reads the entry specified by \a key as a string. If \a ok is not
+    0, \a *ok is set to TRUE if the key was read, otherwise \a *ok is
+    set to FALSE.
+
+    Note that if you want to iterate over the list, you should iterate
+    over a copy, e.g.
+    \code
+    QStringList list = mySettings.readListEntry( "recentfiles" );
+    QStringList::Iterator it = list.begin();
+    while( it != list.end() ) {
+	myProcessing( *it );
+	++it;
+    }
+    \endcode
+
+    \sa readEntry(), readDoubleEntry(), readBoolEntry(), writeEntry(), removeEntry(), QStringList::split()
+*/
+
+/*!
+    \internal
+*/
+QStringList QSettings::readListEntry(const QString &key, bool *ok )
+{
+    QString value = readEntry( key, QString::null, ok );
+    if ( ok && !*ok )
+	return QStringList();
+    QStringList l;
+    QString s;
+    bool esc=FALSE;
+    for (int i=0; i<(int)value.length(); i++) {
+	if ( esc ) {
+	    if ( value[i] == 'e' ) { // end-of-string
+		l.append(s);
+		s="";
+	    } else if ( value[i] == '0' ) { // null string
+		s=QString::null;
+	    } else {
+		s.append(value[i]);
+	    }
+	    esc=FALSE;
+	} else if ( value[i] == '^' ) {
+	    esc = TRUE;
+	} else {
+	    s.append(value[i]);
+	    if ( i == (int)value.length()-1 )
+		l.append(s);
+	}
+    }
+    return l;
+}
+
+/*!
+  Insert platform-dependent paths from platform-independent information.
+
+  The \a domain should be an Internet domain name
+  controlled by the producer of the software, eg. Trolltech products
+  use "trolltech.com".
+
+  The \a product should be the official name of the product.
+
+  The \a scope should be
+  QSettings::User for user-specific settings, or
+  QSettings::Global for system-wide settings (generally
+  these will be read-only to many users).
+*/
+
+void QSettings::setPath( const QString &domain, const QString &product, Scope scope )
+{
+//    On Windows, any trailing ".com(\..*)" is stripped from the domain. The
+//    Global scope corresponds to HKEY_LOCAL_MACHINE, and User corresponds to
+//    HKEY_CURRENT_USER. Note that on some installations, not all users can
+//    write to the Global scope. On UNIX, any trailing ".com(\..*)" is stripped
+//    from the domain. The Global scope corresponds to "/opt" (this would be
+//    configurable at library build time - eg. to "/usr/local" or "/usr"),
+//    while the User scope corresponds to $HOME/.*rc.
+//    Note that on most installations, not all users can write to the System
+//    scope.
+//    
+//    On MacOS X, if there is no "." in domain, append ".com", then reverse the
+//    order of the elements (Mac OS uses "com.apple.finder" as domain+product).
+//    The Global scope corresponds to /Library/Preferences/*.plist, while the
+//    User scope corresponds to ~/Library/Preferences/*.plist.
+//    Note that on most installations, not all users can write to the System
+//    scope.
+    QString actualSearchPath;
+    int lastDot = domain.findRev( '.' );
+
+#if defined(Q_WS_WIN)
+    actualSearchPath = "/" + domain.mid( 0, lastDot ) + "/" + product;
+    insertSearchPath( Windows, actualSearchPath );
+#elif defined(Q_WS_MAC)
+    QString topLevelDomain = domain.right( domain.length() - lastDot - 1 ) + ".";
+    if ( topLevelDomain.isEmpty() )
+	topLevelDomain = "com.";
+    actualSearchPath = "/" + topLevelDomain + domain.left( lastDot ) + product;
+    insertSearchPath( Mac, actualSearchPath );
+#else
+    actualSearchPath = "/" + domain.mid( 0, lastDot ) + "/" + product;
+    insertSearchPath( Unix, actualSearchPath );
+#endif
+
+    d->globalScope = scope == Global;
+}
+
+/*!
+    Appends \a group to the current key prefix.
+*/
+void QSettings::beginGroup( const QString &group )
+{
+    d->groupStack.push( group );
+    d->groupDirty = TRUE;
+}
+
+/*!
+    Undo previous calls to beginGroup(). Note that a single beginGroup("a/b/c") is undone
+    by a single call to endGroup().
+*/
+void QSettings::endGroup()
+{
+    d->groupStack.pop();
+    d->groupDirty = TRUE;
+}
+
+/*!
+    Set the current key prefix to the empty string.
+*/
+void QSettings::resetGroup()
+{
+    d->groupStack.clear();
+    d->groupDirty = FALSE;
+    d->groupPrefix = QString::null;
+}
+
+/*!
+    Returns the current key prefix, or a null string if there is no key prefix set.
+
+    \sa beginGroup();
+*/
+QString QSettings::group() const
+{
+    if ( d->groupDirty ) {
+	d->groupDirty = FALSE;
+	d->groupPrefix = QString::null;
+
+	QValueStack<QString>::Iterator it = d->groupStack.begin();
+	while ( it != d->groupStack.end() ) {
+	    QString group = *it;
+	    ++it;
+	    if ( group[0] != '/' )
+		group = "/" + group;
+	    d->groupPrefix += group;
+	}
+    }
+    return d->groupPrefix;
+}
+
+#endif