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| |
| #ifndef QFILEINFO_P_H |
| #define QFILEINFO_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 "qfileinfo.h" |
| #include "qdatetime.h" |
| #include "qatomic.h" |
| #include "qshareddata.h" |
| #include "qfilesystemengine_p.h" |
| |
| #include <QtCore/private/qabstractfileengine_p.h> |
| #include <QtCore/private/qfilesystementry_p.h> |
| #include <QtCore/private/qfilesystemmetadata_p.h> |
| |
| #include <memory> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QFileInfoPrivate : public QSharedData |
| { |
| public: |
| enum { |
| // note: cachedFlags is only 30-bits wide |
| CachedFileFlags = 0x01, |
| CachedLinkTypeFlag = 0x02, |
| CachedBundleTypeFlag = 0x04, |
| CachedSize = 0x08, |
| CachedATime = 0x10, |
| CachedBTime = 0x20, |
| CachedMCTime = 0x40, |
| CachedMTime = 0x80, |
| CachedPerms = 0x100 |
| }; |
| |
| inline QFileInfoPrivate() |
| : QSharedData(), fileEngine(nullptr), |
| cachedFlags(0), |
| isDefaultConstructed(true), |
| cache_enabled(true), fileFlags(0), fileSize(0) |
| {} |
| inline QFileInfoPrivate(const QFileInfoPrivate ©) |
| : QSharedData(copy), |
| fileEntry(copy.fileEntry), |
| metaData(copy.metaData), |
| fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)), |
| cachedFlags(0), |
| #ifndef QT_NO_FSFILEENGINE |
| isDefaultConstructed(false), |
| #else |
| isDefaultConstructed(!fileEngine), |
| #endif |
| cache_enabled(copy.cache_enabled), fileFlags(0), fileSize(0) |
| {} |
| inline QFileInfoPrivate(const QString &file) |
| : fileEntry(QDir::fromNativeSeparators(file)), |
| fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)), |
| cachedFlags(0), |
| #ifndef QT_NO_FSFILEENGINE |
| isDefaultConstructed(file.isEmpty()), |
| #else |
| isDefaultConstructed(!fileEngine), |
| #endif |
| cache_enabled(true), fileFlags(0), fileSize(0) |
| { |
| } |
| |
| inline QFileInfoPrivate(const QFileSystemEntry &file, const QFileSystemMetaData &data) |
| : QSharedData(), |
| fileEntry(file), |
| metaData(data), |
| fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)), |
| cachedFlags(0), |
| isDefaultConstructed(false), |
| cache_enabled(true), fileFlags(0), fileSize(0) |
| { |
| //If the file engine is not null, this maybe a "mount point" for a custom file engine |
| //in which case we can't trust the metadata |
| if (fileEngine) |
| metaData = QFileSystemMetaData(); |
| } |
| |
| inline QFileInfoPrivate(const QFileSystemEntry &file, const QFileSystemMetaData &data, std::unique_ptr<QAbstractFileEngine> engine) |
| : fileEntry(file), |
| metaData(data), |
| fileEngine{std::move(engine)}, |
| cachedFlags(0), |
| #ifndef QT_NO_FSFILEENGINE |
| isDefaultConstructed(false), |
| #else |
| isDefaultConstructed(!fileEngine), |
| #endif |
| cache_enabled(true), fileFlags(0), fileSize(0) |
| { |
| } |
| |
| inline void clearFlags() const { |
| fileFlags = 0; |
| cachedFlags = 0; |
| if (fileEngine) |
| (void)fileEngine->fileFlags(QAbstractFileEngine::Refresh); |
| } |
| inline void clear() { |
| metaData.clear(); |
| clearFlags(); |
| for (int i = QAbstractFileEngine::NFileNames - 1 ; i >= 0 ; --i) |
| fileNames[i].clear(); |
| fileOwners[1].clear(); |
| fileOwners[0].clear(); |
| } |
| |
| uint getFileFlags(QAbstractFileEngine::FileFlags) const; |
| QDateTime &getFileTime(QAbstractFileEngine::FileTime) const; |
| QString getFileName(QAbstractFileEngine::FileName) const; |
| QString getFileOwner(QAbstractFileEngine::FileOwner own) const; |
| |
| QFileSystemEntry fileEntry; |
| mutable QFileSystemMetaData metaData; |
| |
| std::unique_ptr<QAbstractFileEngine> const fileEngine; |
| |
| mutable QString fileNames[QAbstractFileEngine::NFileNames]; |
| mutable QString fileOwners[2]; // QAbstractFileEngine::FileOwner: OwnerUser and OwnerGroup |
| mutable QDateTime fileTimes[4]; // QAbstractFileEngine::FileTime: BirthTime, MetadataChangeTime, ModificationTime, AccessTime |
| |
| mutable uint cachedFlags : 30; |
| bool const isDefaultConstructed : 1; // QFileInfo is a default constructed instance |
| bool cache_enabled : 1; |
| mutable uint fileFlags; |
| mutable qint64 fileSize; |
| inline bool getCachedFlag(uint c) const |
| { return cache_enabled ? (cachedFlags & c) : 0; } |
| inline void setCachedFlag(uint c) const |
| { if (cache_enabled) cachedFlags |= c; } |
| |
| template <typename Ret, typename FSLambda, typename EngineLambda> |
| Ret checkAttribute(Ret defaultValue, QFileSystemMetaData::MetaDataFlags fsFlags, const FSLambda &fsLambda, |
| const EngineLambda &engineLambda) const |
| { |
| if (isDefaultConstructed) |
| return defaultValue; |
| if (fileEngine) |
| return engineLambda(); |
| if (!cache_enabled || !metaData.hasFlags(fsFlags)) { |
| QFileSystemEngine::fillMetaData(fileEntry, metaData, fsFlags); |
| // ignore errors, fillMetaData will have cleared the flags |
| } |
| return fsLambda(); |
| } |
| |
| template <typename Ret, typename FSLambda, typename EngineLambda> |
| Ret checkAttribute(QFileSystemMetaData::MetaDataFlags fsFlags, const FSLambda &fsLambda, |
| const EngineLambda &engineLambda) const |
| { |
| return checkAttribute(Ret(), fsFlags, fsLambda, engineLambda); |
| } |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QFILEINFO_P_H |