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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 QFSFILEENGINE_P_H
#define QFSFILEENGINE_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 "qplatformdefs.h"
#include "QtCore/private/qabstractfileengine_p.h"
#include <QtCore/private/qfilesystementry_p.h>
#include <QtCore/private/qfilesystemmetadata_p.h>
#include <qhash.h>
#include <optional>
#ifdef Q_OS_UNIX
#include <sys/types.h> // for mode_t
#endif
#ifndef QT_NO_FSFILEENGINE
QT_BEGIN_NAMESPACE
struct ProcessOpenModeResult
{
bool ok;
QIODevice::OpenMode openMode;
QString error;
};
Q_CORE_EXPORT ProcessOpenModeResult processOpenModeFlags(QIODevice::OpenMode mode);
class QFSFileEnginePrivate;
class Q_CORE_EXPORT QFSFileEngine : public QAbstractFileEngine
{
Q_DECLARE_PRIVATE(QFSFileEngine)
public:
QFSFileEngine();
explicit QFSFileEngine(const QString &file);
~QFSFileEngine();
bool open(QIODevice::OpenMode openMode, std::optional<QFile::Permissions> permissions) override;
bool open(QIODevice::OpenMode flags, FILE *fh);
bool close() override;
bool flush() override;
bool syncToDisk() override;
qint64 size() const override;
qint64 pos() const override;
bool seek(qint64) override;
bool isSequential() const override;
bool remove() override;
bool copy(const QString &newName) override;
bool rename(const QString &newName) override
{ return rename_helper(newName, Rename); }
bool renameOverwrite(const QString &newName) override
{ return rename_helper(newName, RenameOverwrite); }
bool link(const QString &newName) override;
bool mkdir(const QString &dirName, bool createParentDirectories,
std::optional<QFile::Permissions> permissions) const override;
bool rmdir(const QString &dirName, bool recurseParentDirectories) const override;
bool setSize(qint64 size) override;
bool caseSensitive() const override;
bool isRelativePath() const override;
QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const override;
FileFlags fileFlags(FileFlags type) const override;
bool setPermissions(uint perms) override;
QByteArray id() const override;
QString fileName(FileName file) const override;
uint ownerId(FileOwner) const override;
QString owner(FileOwner) const override;
bool setFileTime(const QDateTime &newDate, QFile::FileTime time) override;
QDateTime fileTime(QFile::FileTime time) const override;
void setFileName(const QString &file) override;
int handle() const override;
#ifndef QT_NO_FILESYSTEMITERATOR
IteratorUniquePtr beginEntryList(const QString &path, QDir::Filters filters,
const QStringList &filterNames) override;
#endif
qint64 read(char *data, qint64 maxlen) override;
qint64 readLine(char *data, qint64 maxlen) override;
qint64 write(const char *data, qint64 len) override;
bool cloneTo(QAbstractFileEngine *target) override;
virtual bool isUnnamedFile() const
{ return false; }
bool extension(Extension extension, const ExtensionOption *option = nullptr, ExtensionReturn *output = nullptr) override;
bool supportsExtension(Extension extension) const override;
//FS only!!
bool open(QIODevice::OpenMode flags, int fd);
bool open(QIODevice::OpenMode flags, int fd, QFile::FileHandleFlags handleFlags);
bool open(QIODevice::OpenMode flags, FILE *fh, QFile::FileHandleFlags handleFlags);
static bool setCurrentPath(const QString &path);
static QString currentPath(const QString &path = QString());
static QString homePath();
static QString rootPath();
static QString tempPath();
static QFileInfoList drives();
protected:
QFSFileEngine(QFSFileEnginePrivate &dd);
private:
enum RenameMode : int { Rename, RenameOverwrite };
bool rename_helper(const QString &newName, RenameMode mode);
};
class Q_AUTOTEST_EXPORT QFSFileEnginePrivate : public QAbstractFileEnginePrivate
{
Q_DECLARE_PUBLIC(QFSFileEngine)
public:
#ifdef Q_OS_WIN
static QString longFileName(const QString &path);
#endif
QFileSystemEntry fileEntry;
QIODevice::OpenMode openMode;
bool nativeOpen(QIODevice::OpenMode openMode, std::optional<QFile::Permissions> permissions);
bool openFh(QIODevice::OpenMode flags, FILE *fh);
bool openFd(QIODevice::OpenMode flags, int fd);
bool nativeClose();
bool closeFdFh();
bool nativeFlush();
bool nativeSyncToDisk();
bool flushFh();
qint64 nativeSize() const;
#ifndef Q_OS_WIN
qint64 sizeFdFh() const;
#endif
qint64 nativePos() const;
qint64 posFdFh() const;
bool nativeSeek(qint64);
bool seekFdFh(qint64);
qint64 nativeRead(char *data, qint64 maxlen);
qint64 readFdFh(char *data, qint64 maxlen);
qint64 nativeReadLine(char *data, qint64 maxlen);
qint64 readLineFdFh(char *data, qint64 maxlen);
qint64 nativeWrite(const char *data, qint64 len);
qint64 writeFdFh(const char *data, qint64 len);
int nativeHandle() const;
bool nativeIsSequential() const;
#ifndef Q_OS_WIN
bool isSequentialFdFh() const;
#endif
#ifdef Q_OS_WIN
bool nativeRenameOverwrite(const QString &newName);
#endif
uchar *map(qint64 offset, qint64 size, QFile::MemoryMapFlags flags);
bool unmap(uchar *ptr);
void unmapAll();
mutable QFileSystemMetaData metaData;
FILE *fh;
#ifdef Q_OS_WIN
HANDLE fileHandle;
HANDLE mapHandle;
QHash<uchar *, DWORD /* offset % AllocationGranularity */> maps;
mutable int cachedFd;
mutable DWORD fileAttrib;
#else
struct StartAndLength {
int start; // offset % PageSize
size_t length; // length + offset % PageSize
};
QHash<uchar *, StartAndLength> maps;
#endif
int fd;
enum LastIOCommand
{
IOFlushCommand,
IOReadCommand,
IOWriteCommand
};
LastIOCommand lastIOCommand;
bool lastFlushFailed;
bool closeFileHandle;
mutable uint is_sequential : 2;
mutable uint tried_stat : 1;
mutable uint need_lstat : 1;
mutable uint is_link : 1;
#if defined(Q_OS_WIN)
bool doStat(QFileSystemMetaData::MetaDataFlags flags) const;
#else
bool doStat(QFileSystemMetaData::MetaDataFlags flags = QFileSystemMetaData::PosixStatFlags) const;
#endif
bool isSymlink() const;
#if defined(Q_OS_WIN32)
int sysOpen(const QString &, int flags);
#endif
static bool openModeCanCreate(QIODevice::OpenMode openMode)
{
// WriteOnly can create, but only when ExistingOnly isn't specified.
// ReadOnly by itself never creates.
return (openMode & QFile::WriteOnly) && !(openMode & QFile::ExistingOnly);
}
protected:
QFSFileEnginePrivate();
void init();
QAbstractFileEngine::FileFlags getPermissions(QAbstractFileEngine::FileFlags type) const;
#ifdef Q_OS_UNIX
bool nativeOpenImpl(QIODevice::OpenMode openMode, mode_t mode);
#endif
};
QT_END_NAMESPACE
#endif // QT_NO_FSFILEENGINE
#endif // QFSFILEENGINE_P_H
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