Initial community commit

Src/external_dependencies/openmpt-trunk/include/unrar/qopen.hpp

@@ -0,0 +1,61 @@
+#ifndef _RAR_QOPEN_
+#define _RAR_QOPEN_
+
+struct QuickOpenItem
+{
+  byte *Header;
+  size_t HeaderSize;
+  uint64 ArcPos;
+  QuickOpenItem *Next;
+};
+
+
+class Archive;
+class RawRead;
+
+class QuickOpen
+{
+  private:
+    void Close();
+
+
+    uint ReadBuffer();
+    bool ReadRaw(RawRead &Raw);
+    bool ReadNext();
+
+    Archive *Arc;
+    bool WriteMode;
+
+    QuickOpenItem *ListStart;
+    QuickOpenItem *ListEnd;
+    
+    byte *Buf; // Read quick open data here.
+    static const size_t MaxBufSize=0x10000; // Buf size, must be multiple of CRYPT_BLOCK_SIZE.
+    size_t CurBufSize; // Current size of buffered data in write mode.
+#ifndef RAR_NOCRYPT // For shell extension.
+    CryptData Crypt;
+#endif
+
+    bool Loaded;
+    uint64 QOHeaderPos;  // Main QO header position.
+    uint64 RawDataStart; // Start of QO data, just after the main header.
+    uint64 RawDataSize;  // Size of entire QO data.
+    uint64 RawDataPos;   // Current read position in QO data.
+    size_t ReadBufSize;  // Size of Buf data currently read from QO.
+    size_t ReadBufPos;   // Current read position in Buf data.
+    Array<byte> LastReadHeader;
+    uint64 LastReadHeaderPos;
+    uint64 SeekPos;
+    bool UnsyncSeekPos;  // QOpen SeekPos does not match an actual file pointer.
+  public:
+    QuickOpen();
+    ~QuickOpen();
+    void Init(Archive *Arc,bool WriteMode);
+    void Load(uint64 BlockPos);
+    void Unload() { Loaded=false; }
+    bool Read(void *Data,size_t Size,size_t &Result);
+    bool Seek(int64 Offset,int Method);
+    bool Tell(int64 *Pos);
+};
+
+#endif