qfileinfo.cpp

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/****************************************************************************
** $Id: qfileinfo.cpp,v 1.2 2003/07/10 02:40:11 llornkcor Exp $
**
** Implementation of QFileInfo class
**
** Created : 950628
**
** Copyright (C) 1992-2002 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"

#include "qfileinfo.h"
#include "qdatetime.h"
#include "qdir.h"
#include "qfiledefs_p.h"
#if defined(QT_LARGEFILE_SUPPORT) && !defined(QT_ABI_QT4)
#include <limits.h>
#endif


extern bool qt_file_access( const QString& fn, int t );

QFileInfo::QFileInfo()
{
    fic   = 0;
    cache = TRUE;
#if defined(Q_OS_UNIX)
    symLink = FALSE;
#endif
}

QFileInfo::QFileInfo( const QString &file )
{
    fn    = file;
    slashify( fn );
    fic   = 0;
    cache = TRUE;
#if defined(Q_OS_UNIX)
    symLink = FALSE;
#endif
}

QFileInfo::QFileInfo( const QFile &file )
{
    fn    = file.name();
    slashify( fn );
    fic   = 0;
    cache = TRUE;
#if defined(Q_OS_UNIX)
    symLink = FALSE;
#endif
}

#ifndef QT_NO_DIR
QFileInfo::QFileInfo( const QDir &d, const QString &fileName )
{
    fn    = d.filePath( fileName );
    slashify( fn );
    fic   = 0;
    cache = TRUE;
#if defined(Q_OS_UNIX)
    symLink = FALSE;
#endif
}
#endif

QFileInfo::QFileInfo( const QFileInfo &fi )
{
    fn = fi.fn;
    if ( fi.fic ) {
        fic = new QFileInfoCache;
        *fic = *fi.fic;
    } else {
        fic = 0;
    }
    cache = fi.cache;
#if defined(Q_OS_UNIX)
    symLink = fi.symLink;
#endif
}

QFileInfo::~QFileInfo()
{
    delete fic;
}


QFileInfo &QFileInfo::operator=( const QFileInfo &fi )
{
    fn = fi.fn;
    if ( !fi.fic ) {
        delete fic;
        fic = 0;
    } else {
        if ( !fic ) {
            fic = new QFileInfoCache;
            Q_CHECK_PTR( fic );
        }
        *fic = *fi.fic;
    }
    cache = fi.cache;
#if defined(Q_OS_UNIX)
    symLink = fi.symLink;
#endif
    return *this;
}


void QFileInfo::setFile( const QString &file )
{
    fn = file;
    slashify( fn );
    delete fic;
    fic = 0;
}

void QFileInfo::setFile( const QFile &file )
{
    fn  = file.name();
    slashify( fn );
    delete fic;
    fic = 0;
}

#ifndef QT_NO_DIR
void QFileInfo::setFile( const QDir &d, const QString &fileName )
{
    fn  = d.filePath( fileName );
    slashify( fn );
    delete fic;
    fic = 0;
}
#endif

bool QFileInfo::exists() const
{
    return qt_file_access( fn, F_OK );
}

void QFileInfo::refresh() const
{
    QFileInfo *that = (QFileInfo*)this;         // Mutable function
    delete that->fic;
    that->fic = 0;
}

void QFileInfo::setCaching( bool enable )
{
    if ( cache == enable )
        return;
    cache = enable;
    if ( cache ) {
        delete fic;
        fic = 0;
    }
}


QString QFileInfo::filePath() const
{
    return fn;
}

QString QFileInfo::baseName( bool complete ) const
{
    QString tmp = fileName();
    int pos = complete ? tmp.findRev( '.' ) : tmp.find( '.' );
    if ( pos == -1 )
        return tmp;
    else
        return tmp.left( pos );
}

QString QFileInfo::extension( bool complete ) const
{
    QString s = fileName();
    int pos = complete ? s.find( '.' ) : s.findRev( '.' );
    if ( pos < 0 )
        return QString::fromLatin1( "" );
    else
        return s.right( s.length() - pos - 1 );
}

#ifndef QT_NO_DIR
QDir QFileInfo::dir( bool absPath ) const
{
    return QDir( dirPath(absPath) );
}
#endif


bool QFileInfo::isReadable() const
{
    return qt_file_access( fn, R_OK ) && permission( ReadUser );
}

bool QFileInfo::isWritable() const
{
    return qt_file_access( fn, W_OK ) && permission( WriteUser );
}

bool QFileInfo::isExecutable() const
{
    return qt_file_access( fn, X_OK ) && permission( ExeUser );
}

#ifndef Q_WS_WIN
bool QFileInfo::isHidden() const
{
    return fileName()[ 0 ] == QChar( '.' );
}
#endif

#ifndef QT_NO_DIR
bool QFileInfo::isRelative() const
{
    return QDir::isRelativePath( fn );
}

bool QFileInfo::convertToAbs()
{
    if ( isRelative() )
        fn = absFilePath();
    return QDir::isRelativePath( fn );
}
#endif

#if defined(QT_ABI_QT4)
QIODevice::Offset QFileInfo::size() const
#else
uint QFileInfo::size() const
#endif
{
    if ( !fic || !cache )
        doStat();
    if ( fic )
#if defined(QT_ABI_QT4)
        return (QIODevice::Offset)fic->st.st_size;
#elif defined(QT_LARGEFILE_SUPPORT)
        return (uint)fic->st.st_size > UINT_MAX ? UINT_MAX : (uint)fic->st.st_size;
#else
        return (uint)fic->st.st_size;
#endif
    else
        return 0;
}

QDateTime QFileInfo::created() const
{
    QDateTime dt;
    if ( !fic || !cache )
        doStat();
    if ( fic && fic->st.st_ctime != 0 ) {
        dt.setTime_t( fic->st.st_ctime );
        return dt;
    } else {
        return lastModified();
    }
}

QDateTime QFileInfo::lastModified() const
{
    QDateTime dt;
    if ( !fic || !cache )
        doStat();
    if ( fic )
        dt.setTime_t( fic->st.st_mtime );
    return dt;
}

QDateTime QFileInfo::lastRead() const
{
    QDateTime dt;
    if ( !fic || !cache )
        doStat();
    if ( fic && fic->st.st_atime != 0 ) {
        dt.setTime_t( fic->st.st_atime );
        return dt;
    } else {
        return lastModified();
    }
}

#ifndef QT_NO_DIR

QString QFileInfo::absFilePath() const
{
    QString tmp;
    if ( QDir::isRelativePath(fn)
#if defined(Q_OS_WIN32)
         && fn[1] != ':'
#endif
         ) {
        tmp = QDir::currentDirPath();
        tmp += '/';
    }
    tmp += fn;
    makeAbs( tmp );
    return QDir::cleanDirPath( tmp );
}

#endif

---