src/corelib/io/qfileinfo_p.h

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  41
  42 #ifndef QFILEINFO_P_H
  43 #define QFILEINFO_P_H
  44
  45 //
  46 //  W A R N I N G
  47 //  -------------
  48 //
  49 // This file is not part of the Qt API.  It exists purely as an
  50 // implementation detail.  This header file may change from version to
  51 // version without notice, or even be removed.
  52 //
  53 // We mean it.
  54 //
  55
  56 #include "qfileinfo.h"
  57 #include "qabstractfileengine.h"
  58 #include "qdatetime.h"
  59 #include "qatomic.h"
  60
  61 QT_BEGIN_NAMESPACE
  62
  63 class QFileInfoPrivate
  64 {
  65 public:
  66     QFileInfoPrivate(const QFileInfo *copy=0);
  67     ~QFileInfoPrivate();
  68
  69     void initFileEngine(const QString &);
  70
  71     enum Access {
  72         ReadAccess,
  73         WriteAccess,
  74         ExecuteAccess
  75     };
  76     bool hasAccess(Access access) const;
  77
  78     uint getFileFlags(QAbstractFileEngine::FileFlags) const;
  79     QDateTime &getFileTime(QAbstractFileEngine::FileTime) const;
  80     QString getFileName(QAbstractFileEngine::FileName) const;
  81
  82     enum { CachedFileFlags=0x01, CachedLinkTypeFlag=0x02, CachedBundleTypeFlag=0x04,
  83            CachedMTime=0x10, CachedCTime=0x20, CachedATime=0x40,
  84            CachedSize =0x08, CachedPerms=0x80 };
  85     struct Data {
  86         inline Data()
  87             : ref(1), fileEngine(0),
  88               cachedFlags(0), cache_enabled(1), fileFlags(0), fileSize(0)
  89         {}
  90         inline Data(const Data &copy)
  91             : ref(1), fileEngine(QAbstractFileEngine::create(copy.fileName)),
  92               fileName(copy.fileName),
  93               cachedFlags(0), cache_enabled(copy.cache_enabled), fileFlags(0), fileSize(0)
  94         {}
  95         inline ~Data() { delete fileEngine; }
  96         inline void clearFlags() {
  97             fileFlags = 0;
  98             cachedFlags = 0;
  99             if (fileEngine)
 100                 (void)fileEngine->fileFlags(QAbstractFileEngine::Refresh);
 101         }
 102         inline void clear() {
 103             clearFlags();
 104             for (int i = QAbstractFileEngine::NFileNames - 1 ; i >= 0 ; --i)
 105                 fileNames[i].clear();
 106         }
 107         mutable QAtomicInt ref;
 108
 109         QAbstractFileEngine *fileEngine;
 110         mutable QString fileName;
 111         mutable QString fileNames[QAbstractFileEngine::NFileNames];
 112
 113         mutable uint cachedFlags : 31;
 114         mutable uint cache_enabled : 1;
 115         mutable uint fileFlags;
 116         mutable qint64 fileSize;
 117         mutable QDateTime fileTimes[3];
 118         inline bool getCachedFlag(uint c) const
 119         { return cache_enabled ? (cachedFlags & c) : 0; }
 120         inline void setCachedFlag(uint c)
 121         { if (cache_enabled) cachedFlags |= c; }
 122     } *data;
 123     inline void reset() {
 124         detach();
 125         data->clear();
 126     }
 127     void detach();
 128 };
 129
 130 QT_END_NAMESPACE
 131
 132 #endif // QFILEINFO_P_H