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- /*
- This file is part of the KDE libraries
- Copyright (c) 1999 Waldo Bastian <bastian@kde.org>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License version 2 as published by the Free Software Foundation.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
-
- #ifndef _KSAVEFILE_H_
- #define _KSAVEFILE_H_
-
- #include <qstring.h>
- #include <stdio.h>
- #include <errno.h>
- #include <ktempfile.h>
-
- class KSaveFilePrivate;
-
- /**
- * The KSaveFile class has been made to write out changes to an existing
- * file atomically.
- * This means that EITHER:
- * a)
- * All changes have been written successfully to the file.
- *
- * b)
- * Some error occurred, no changes have been written whatsoever and the
- * old file is still in place.
- */
- class KDECORE_EXPORT KSaveFile
- {
- public:
- /**
- * Creates a new KSaveFile with the given file name.
- * @param filename the path of the file
- * @param mode the mode of the file (see chmod(1))
- */
- KSaveFile(const QString &filename, int mode = 0666 );
-
- /**
- * The destructor closes the file.
- * You might want to call close() explicitely though, to test whether it worked.
- **/
- ~KSaveFile();
-
- /**
- * Returns the status of the file based on errno. (see errno.h)
- * 0 means OK.
- *
- * You should check the status after object creation to check
- * whether a file could be created in the first place.
- *
- * You may check the status after closing the file to verify that
- * the file has indeed been written correctly.
- * @return the errno status, 0 means ok
- **/
- int status() const
- { return mTempFile.status(); }
-
- /**
- * The name of the file as passed to the constructor.
- * @return The name of the file, or QString::null if opening the
- * file has failed
- **/
- QString name() const;
-
- /**
- * An integer file descriptor open for writing to the file.
- * @return The file descriptor, or a negative number if opening
- * the temporary file failed
- **/
- int handle() const
- { return mTempFile.handle(); }
-
- /**
- * A FILE* stream open for writing to the file.
- * @return FILE* stream open for writing to the file, or 0
- * if opening the temporary file failed
- **/
- FILE *fstream()
- { return mTempFile.fstream(); }
-
- /**
- * A QFile* open for writing to the file.
- * @return A QFile open for writing to the file, or 0 if
- * opening the temporary file failed.
- **/
- QFile *file()
- { return mTempFile.file(); }
-
- /**
- * A QTextStream* open for writing to the file.
- * @return A QTextStream that is open for writing to the file, or 0
- * if opening the temporary file failed
- **/
- QTextStream *textStream()
- { return mTempFile.textStream(); }
-
- /**
- * A QDataStream* open for writing to the file.
- * @return A QDataStream that is open for writing to the file, or 0
- * if opening the file failed
- **/
- QDataStream *dataStream()
- { return mTempFile.dataStream(); }
-
- /**
- * Aborts the write operation and removes any intermediate files
- * This implies a close.
- **/
- void abort();
-
- /**
- * Closes the file and makes the changes definitive.
- * Returns 'true' is successful, or 'false' if an error has occurred.
- * See status() for details about errors.
- * @return true if successful, or false if an error has occurred.
- **/
- bool close();
-
- /**
- * Static method to create a backup file before saving.
- * You can use this method even if you don't use KSaveFile.
- * @param filename the file to backup
- * @param backupDir optional directory where to save the backup file in.
- * If empty (the default), the backup will be in the same directory as @p filename.
- * @param backupExtension the extension to append to @p filename, "~" by default.
- * @since 3.2
- */
- static bool backupFile( const QString& filename,
- const QString& backupDir = QString::null,
- const QString& backupExtension = QString::fromLatin1( "~" ) );
-
- private:
- QString mFileName;
- KTempFile mTempFile;
-
- KSaveFilePrivate *d;
- };
-
- #endif
-