Class CUT_FileDataSource

UTCP/include/UTDataSource.h:87–125

================================================================= CUT_FileDataSource class Data source class for CUT_Msg class based on the file =================================================================

//  Data source class for CUT_Msg class based on the file
// =================================================================
class CUT_FileDataSource : public CUT_DataSource {

protected:
    CUT_File    m_file;                     // File class
    LPSTR       m_lpszBuffer;               // File Reading buffer
    int         m_nBufferSize;              // File Reading buffer szie
    int         m_nLoadedDataSize;          // Number of bytes read into buffer
    _TCHAR      m_szFileName[MAX_PATH+1];   // File name

public:

    CUT_FileDataSource(LPCTSTR filename, int nBufferSize = 4096);
    virtual ~CUT_FileDataSource();

    // Virtual clone constructor
    virtual CUT_DataSource * clone();

    // Opens data file type == UTM_OM_READING, UTM_OM_WRITING, UTM_OM_APPEND
    virtual int     Open(OpenMsgType type);

    // Close data file
    virtual int     Close();

    // Read one line from the data file
    virtual int     ReadLine(LPSTR buffer, size_t maxsize);

    // Write one line to the data file
    virtual int     WriteLine(LPCSTR buffer);

    // Read data
    virtual int     Read(LPSTR buffer, size_t count);

    // Write data
    virtual int     Write(LPCSTR buffer, size_t count);

    // Move a current pointer to the specified location.
    virtual long    Seek(long offset, int origin);

};

// =================================================================
//  CUT_BufferDataSource class