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

** 

**

** Implementation of QDirclass

**

** Created : 950628

**

** Copyright (C) 1992-2000 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 for Unix/X11 or for Qt/Embedded 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 "qglobal.h"

#include "qdir.h"

#ifndef QT_NO_DIR

#include "qfileinfo.h"

#include "qfiledefs_p.h"

#include "qregexp.h"

#include "qstringlist.h"

#include <stdlib.h>

#include <ctype.h>

extern QStringList qt_makeFilterList( const QString &filter );

extern int qt_cmp_si_sortSpec;

#if defined(Q_C_CALLBACKS)

extern "C" {

#endif

extern int qt_cmp_si( const void *, const void * );

#if defined(Q_C_CALLBACKS)

}

#endif

void QDir::slashify( QString& )

{

}

QString QDir::homeDirPath()

{

    QString d;

    d = QFile::decodeName(getenv("HOME"));

    slashify( d );

    if ( d.isNull() )

	d = rootDirPath();

    return d;

}

QString QDir::canonicalPath() const

{

    QString r;

    char cur[PATH_MAX];

    char tmp[PATH_MAX];

    if (GETCWD( cur, PATH_MAX )) {

      if ( CHDIR(QFile::encodeName(dPath)) >= 0 ) {

  	if (GETCWD( tmp, PATH_MAX )) {

  	  r = QFile::decodeName(tmp);

        }

        (void)CHDIR( cur );

      }

    }

    slashify( r );

    return r;

}

bool QDir::mkdir( const QString &dirName, bool acceptAbsPath ) const

{

    return MKDIR( QFile::encodeName(filePath(dirName,acceptAbsPath)), 0777 ) 

	== 0;

}

bool QDir::rmdir( const QString &dirName, bool acceptAbsPath ) const

{

    return RMDIR( QFile::encodeName(filePath(dirName,acceptAbsPath)) ) == 0;

}

bool QDir::isReadable() const

{

    return ACCESS( QFile::encodeName(dPath), R_OK | X_OK ) == 0;

}

bool QDir::isRoot() const

{

    return dPath == QString::fromLatin1("/");

}

bool QDir::rename( const QString &name, const QString &newName,

		   bool acceptAbsPaths	)

{

    if ( name.isEmpty() || newName.isEmpty() ) {

#if defined(CHECK_NULL)

	qWarning( "QDir::rename: Empty or null file name(s)" );

#endif

	return FALSE;

    }

    QString fn1 = filePath( name, acceptAbsPaths );

    QString fn2 = filePath( newName, acceptAbsPaths );

    return ::rename( QFile::encodeName(fn1),

		     QFile::encodeName(fn2) ) == 0;

}

bool QDir::setCurrent( const QString &path )

{

    int r;

    r = CHDIR( QFile::encodeName(path) );

    return r >= 0;

}

QString QDir::currentDirPath()

{

    QString result;

    STATBUF st;

    if ( STAT( ".", &st ) == 0 ) {

	char currentName[PATH_MAX];

	if ( GETCWD( currentName, PATH_MAX ) != 0 )

	    result = QFile::decodeName(currentName);

#if defined(DEBUG)

	if ( result.isNull() )

	    qWarning( "QDir::currentDirPath: getcwd() failed" );

#endif

    } else {

#if defined(DEBUG)

	qWarning( "QDir::currentDirPath: stat(\".\") failed" );

#endif

    }

    slashify( result );

    return result;

}

QString QDir::rootDirPath()

{

    QString d = QString::fromLatin1( "/" );

    return d;

}

bool QDir::isRelativePath( const QString &path )

{

    int len = path.length();

    if ( len == 0 )

	return TRUE;

    return path[0] != '/';

}

bool QDir::readDirEntries( const QString &nameFilter,

			   int filterSpec, int sortSpec )

{

    int i;

    if ( !fList ) {

	fList  = new QStringList;

	CHECK_PTR( fList );

	fiList = new QFileInfoList;

	CHECK_PTR( fiList );

	fiList->setAutoDelete( TRUE );

    } else {

	fList->clear();

	fiList->clear();

    }

    QStringList filters = qt_makeFilterList( nameFilter );

    bool doDirs	    = (filterSpec & Dirs)	!= 0;

    bool doFiles    = (filterSpec & Files)	!= 0;

    bool noSymLinks = (filterSpec & NoSymLinks) != 0;

    bool doReadable = (filterSpec & Readable)	!= 0;

    bool doWritable = (filterSpec & Writable)	!= 0;

    bool doExecable = (filterSpec & Executable) != 0;

    bool doHidden   = (filterSpec & Hidden)	!= 0;

#if defined(_OS_OS2EMX_)

    //QRegExp   wc( nameFilter, FALSE, TRUE );	// wild card, case insensitive

#else

    //QRegExp   wc( nameFilter, TRUE, TRUE );	// wild card, case sensitive

#endif

    QFileInfo fi;

    DIR	     *dir;

    dirent   *file;

    dir = opendir( QFile::encodeName(dPath) );

    if ( !dir ) {

#if defined(CHECK_NULL)

	qWarning( "QDir::readDirEntries: Cannot read the directory: %s",

		  QFile::encodeName(dPath).data() );

#endif

	return FALSE;

    }

    while ( (file = readdir(dir)) ) {

	QString fn = QFile::decodeName(file->d_name);

	fi.setFile( *this, fn );

	if ( !match( filters, fn ) && !(allDirs && fi.isDir()) )

	     continue;

	if  ( (doDirs && fi.isDir()) || (doFiles && fi.isFile()) ) {

	    if ( noSymLinks && fi.isSymLink() )

	        continue;

	    if ( (filterSpec & RWEMask) != 0 )

	        if ( (doReadable && !fi.isReadable()) ||

	             (doWritable && !fi.isWritable()) ||

	             (doExecable && !fi.isExecutable()) )

	            continue;

	    if ( !doHidden && fn[0] == '.' &&

	         fn != QString::fromLatin1(".")

	         && fn != QString::fromLatin1("..") )

	        continue;

	    fiList->append( new QFileInfo( fi ) );

	}

    }

    if ( closedir(dir) != 0 ) {

#if defined(CHECK_NULL)

	qWarning( "QDir::readDirEntries: Cannot close the directory: %s",

		  dPath.local8Bit().data() );

#endif

    }

    // Sort...

    if(fiList->count()) {

	QDirSortItem* si= new QDirSortItem[fiList->count()];

	QFileInfo* itm;

	i=0;

	for (itm = fiList->first(); itm; itm = fiList->next())

	    si[i++].item = itm;

	qt_cmp_si_sortSpec = sortSpec;

	qsort( si, i, sizeof(si[0]), qt_cmp_si );

	// put them back in the list

	fiList->setAutoDelete( FALSE );

	fiList->clear();

	int j;

	for ( j=0; j

	    fiList->append( si[j].item );

	    fList->append( si[j].item->fileName() );

	}

	delete [] si;

	fiList->setAutoDelete( TRUE );

    }

    if ( filterSpec == (FilterSpec)filtS && sortSpec == (SortSpec)sortS &&

	 nameFilter == nameFilt )

	dirty = FALSE;

    else

	dirty = TRUE;

    return TRUE;

}

const QFileInfoList * QDir::drives()

{

    // at most one instance of QFileInfoList is leaked, and this variable

    // points to that list

    static QFileInfoList * knownMemoryLeak = 0;

    if ( !knownMemoryLeak ) {

	knownMemoryLeak = new QFileInfoList;

	// non-win32 versions both use just one root directory

	knownMemoryLeak->append( new QFileInfo( rootDirPath() ) );

    }

    return knownMemoryLeak;

}

#endif //QT_NO_DIR