www.pudn.com > RSImageManger.rar > FILESRC.H

/* 
/-------------------------------------------------------------------- 
| 
|      $id$ 
| 
|      Copyright (c) 1996-1998 Ulrich von Zadow 
| 
-------------------------------------------------------------------- 
*/ 
 
#ifndef INCL_FILESRC 
#define INCL_FILESRC 
 
#ifndef INCL_DATASRC 
#include "datasrc.h" 
#endif 
 
#ifdef _WINDOWS 
#define FILE_MAPPING 
#endif 
 
class IProgressNotification; 
 
//! This is a class which takes a file as a source of picture data. 
class CFileSource : public CDataSource 
{ 
 
public: 
  //! 
  CFileSource 
    ( IProgressNotification * pNotification = NULL 
    ); 
 
  //! 
  virtual ~CFileSource 
    (); 
 
  //! 
  virtual int Open 
    ( const char * pszFName 
    ); 
 
  //! 
  virtual void Close 
    (); 
 
  virtual BYTE * ReadNBytes 
    ( int n 
    ); 
 
  //! Read but don't advance file pointer. 
  virtual BYTE * GetBufferPtr 
    ( int MinBytesInBuffer 
    ); 
 
  virtual BYTE * ReadEverything 
    (); 
 
private: 
#ifdef FILE_MAPPING 
  HANDLE m_hf;    // File handle. 
  HANDLE m_hm;    // Handle to file-mapping object. 
 
#else 
  BOOL bytesAvailable 
    ( int n 
    ); 
 
  void fillBuffer 
    (); 
 
  FILE * m_pFile; 
  BYTE * m_pBuffer; 
 
  BYTE * m_pReadPos; 
  int m_BytesReadFromFile; 
#endif 
  BYTE * m_pStartData; 
  BYTE * m_pCurPos; 
}; 
 
#endif 
/* 
/-------------------------------------------------------------------- 
| 
|      $log$ 
| 
-------------------------------------------------------------------- 
*/