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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QTEMPORARYFILE_P_H
#define QTEMPORARYFILE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qglobal.h>
#include "private/qfsfileengine_p.h"
#include "private/qfilesystemengine_p.h"
#include "private/qfile_p.h"
#include "qtemporaryfile.h"
#if defined(Q_OS_LINUX) && QT_CONFIG(linkat)
# include <fcntl.h>
# ifdef O_TMPFILE
// some early libc support had the wrong values for O_TMPFILE
// (see https://bugzilla.gnome.org/show_bug.cgi?id=769453#c18)
# if (O_TMPFILE & O_DIRECTORY) == O_DIRECTORY
# define LINUX_UNNAMED_TMPFILE
# endif
# endif
#endif
QT_BEGIN_NAMESPACE
struct QTemporaryFileName
{
QFileSystemEntry::NativePath path;
qsizetype pos;
qsizetype length;
QTemporaryFileName(const QString &templateName);
QFileSystemEntry::NativePath generateNext();
};
#ifndef QT_NO_TEMPORARYFILE
class QTemporaryFilePrivate : public QFilePrivate
{
Q_DECLARE_PUBLIC(QTemporaryFile)
public:
QTemporaryFilePrivate();
explicit QTemporaryFilePrivate(const QString &templateNameIn);
~QTemporaryFilePrivate();
QAbstractFileEngine *engine() const override;
void resetFileEngine() const;
void materializeUnnamedFile();
bool autoRemove = true;
QString templateName = defaultTemplateName();
static QString defaultTemplateName();
friend class QLockFilePrivate;
};
class QTemporaryFileEngine : public QFSFileEngine
{
Q_DECLARE_PRIVATE(QFSFileEngine)
public:
enum Flags { Win32NonShared = 0x1 };
explicit QTemporaryFileEngine(const QString *_templateName, int _flags = 0)
: templateName(*_templateName), flags(_flags)
{}
void initialize(const QString &file, quint32 mode, bool nameIsTemplate = true)
{
Q_D(QFSFileEngine);
Q_ASSERT(!isReallyOpen());
fileMode = mode;
filePathIsTemplate = filePathWasTemplate = nameIsTemplate;
if (filePathIsTemplate) {
d->fileEntry.clear();
} else {
d->fileEntry = QFileSystemEntry(file);
QFSFileEngine::setFileName(file);
}
}
~QTemporaryFileEngine();
bool isReallyOpen() const;
void setFileName(const QString &file) override;
bool open(QIODevice::OpenMode flags, std::optional<QFile::Permissions> permissions) override;
bool remove() override;
bool rename(const QString &newName) override;
bool renameOverwrite(const QString &newName) override;
bool close() override;
QString fileName(FileName file) const override;
enum MaterializationMode { Overwrite, DontOverwrite, NameIsTemplate };
bool materializeUnnamedFile(const QString &newName, MaterializationMode mode);
bool isUnnamedFile() const override final;
const QString &templateName;
quint32 fileMode = 0;
int flags = 0;
bool filePathIsTemplate = true;
bool filePathWasTemplate = true;
bool unnamedFile = false;
};
#endif // QT_NO_TEMPORARYFILE
QT_END_NAMESPACE
#endif /* QTEMPORARYFILE_P_H */
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