diff options
author | David Faure <faure@kde.org> | 2012-12-27 07:42:27 -0500 |
---|---|---|
committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-01-17 17:39:11 +0100 |
commit | e993df877131cfafbf1a3578dbef233a3041a82f (patch) | |
tree | 4913597e2253c029b955a7bd2e0ba1c27f43bc43 /src/corelib/io/qsavefile.h | |
parent | e3a10e15ff5a015de28528b5f73316d7aa0de116 (diff) |
Add class QSaveFile.
This QIODevice uses a temporary file for writing, so that in case of
write errors, the writing operation is canceled, without losing any
existing file. It also avoids having a partially-written file visible
by other processes, at the final destination.
Change-Id: I9482df45751cb890b1b6f1382ec2eea3eb980627
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/io/qsavefile.h')
-rw-r--r-- | src/corelib/io/qsavefile.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/corelib/io/qsavefile.h b/src/corelib/io/qsavefile.h new file mode 100644 index 0000000000..47a02a0b83 --- /dev/null +++ b/src/corelib/io/qsavefile.h @@ -0,0 +1,94 @@ +/**************************************************************************** +** +** Copyright (C) 2012 David Faure <faure@kde.org> +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QSAVEFILE_H +#define QSAVEFILE_H + +#include <QtCore/qfiledevice.h> +#include <QtCore/qstring.h> + +#ifdef open +#error qsavefile.h must be included before any header file that defines open +#endif + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + + +class QAbstractFileEngine; +class QSaveFilePrivate; + +class Q_CORE_EXPORT QSaveFile : public QFileDevice +{ + Q_OBJECT + Q_DECLARE_PRIVATE(QSaveFile) + +public: + + explicit QSaveFile(const QString &name); + explicit QSaveFile(QObject *parent = 0); + explicit QSaveFile(const QString &name, QObject *parent); + ~QSaveFile(); + + QString fileName() const Q_DECL_OVERRIDE; + void setFileName(const QString &name); + + bool open(OpenMode flags) Q_DECL_OVERRIDE; + bool commit(); + + void cancelWriting(); + +protected: + qint64 writeData(const char *data, qint64 len) Q_DECL_OVERRIDE; + +private: + void close() Q_DECL_OVERRIDE; + +private: + Q_DISABLE_COPY(QSaveFile) +}; + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QSAVEFILE_H |