#ifndef _RAR_DATAIO_
#define _RAR_DATAIO_

class Archive;
class CmdAdd;
class Unpack;
class ArcFileSearch;

#if 0
// We use external i/o calls for Benchmark command.
#define COMPRDATAIO_EXTIO
#endif

class ComprDataIO
{
  private:
    void ShowUnpRead(int64 ArcPos,int64 ArcSize);
    void ShowUnpWrite();


    bool UnpackFromMemory;
    size_t UnpackFromMemorySize;
    byte *UnpackFromMemoryAddr;

    bool UnpackToMemory;
    size_t UnpackToMemorySize;
    byte *UnpackToMemoryAddr;

    size_t UnpWrSize;
    byte *UnpWrAddr;

    int64 UnpPackedSize;
    int64 UnpPackedLeft;

    bool ShowProgress;
    bool TestMode;
    bool SkipUnpCRC;
    bool NoFileHeader;

    File *SrcFile;
    File *DestFile;

    CmdAdd *Command;

    FileHeader *SubHead;
    int64 *SubHeadPos;

#ifndef RAR_NOCRYPT
    CryptData *Crypt;
    CryptData *Decrypt;
#endif


    int LastPercent;

    wchar CurrentCommand;

  public:
    ComprDataIO();
    ~ComprDataIO();
    void Init();
    int UnpRead(byte *Addr,size_t Count);
    void UnpWrite(byte *Addr,size_t Count);
    void EnableShowProgress(bool Show) {ShowProgress=Show;}
    void GetUnpackedData(byte **Data,size_t *Size);
    void SetPackedSizeToRead(int64 Size) {UnpPackedSize=UnpPackedLeft=Size;}
    void SetTestMode(bool Mode) {TestMode=Mode;}
    void SetSkipUnpCRC(bool Skip) {SkipUnpCRC=Skip;}
    void SetNoFileHeader(bool Mode) {NoFileHeader=Mode;}
    void SetFiles(File *SrcFile,File *DestFile);
    void SetCommand(CmdAdd *Cmd) {Command=Cmd;}
    void SetSubHeader(FileHeader *hd,int64 *Pos) {SubHead=hd;SubHeadPos=Pos;}
    void SetEncryption(bool Encrypt,CRYPT_METHOD Method,SecPassword *Password,
         const byte *Salt,const byte *InitV,uint Lg2Cnt,byte *HashKey,byte *PswCheck);
    void SetAV15Encryption();
    void SetCmt13Encryption();
    void SetUnpackToMemory(byte *Addr,uint Size);
    void SetCurrentCommand(wchar Cmd) {CurrentCommand=Cmd;}
    void AdjustTotalArcSize(Archive *Arc);


    bool PackVolume;
    bool UnpVolume;
    bool NextVolumeMissing;
    int64 CurPackRead,CurPackWrite,CurUnpRead,CurUnpWrite;


    // Size of already processed archives.
    // Used to calculate the total operation progress.
    int64 ProcessedArcSize;

    // Last extracted archive size up to QO or RR block.
    int64 LastArcSize;

    int64 TotalArcSize;

    DataHash PackedDataHash; // Packed write and unpack read hash.
    DataHash PackHash; // Pack read hash.
    DataHash UnpHash;  // Unpack write hash.

    bool Encryption;
    bool Decryption;
};

#endif