wefts_coffee_win.h

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/*
   wefts_coffee_win.h
   Windows implementation for cooperative file functions enlarged enviroment

   $Id: wefts_coffee_win.h,v 1.4 2004/03/13 16:46:27 jonnymind Exp $
---------------------------------------------
   Begin      : 2003-08-15 16:30
   Author     : Giancarlo Niccolai

   Last modified because:

*/

/**************************************************************************
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU Library General Public License as       *
*   published by the Free Software Foundation; either version 2.1 of the  *
*   License, or (at your option) any later version.                       *
***************************************************************************/


#ifndef WT_COFFEE_UNIX_H
#define WT_COFFEE_UNIX_H

// From MSDN, required macro to compile QueueUserAPC
#ifndef _WIN32_WINNT 
#define _WIN32_WINNT 0x0400 
#endif
#include <windows.h>

// Some versions of VC are missing this defines
#ifndef ULONG_PTR
        typedef unsigned long ULONG_PTR;
#endif

#ifndef INVALID_SET_FILE_POINTER
        #define INVALID_SET_FILE_POINTER ((DWORD)-1) 
#endif

#ifdef _MSC_VER
        #pragma warning ( disable:4355 )
#endif


#include <wefts_coffee_base.h>
#include <wefts_os_windows.h>

namespace Wefts {

class OSFileFuncWin : public OSFileFuncBase
{
protected:
   /* Unix file descriptor to the open field */
   HANDLE m_handle;
   HANDLE m_evtComplete;
   
   LARGE_INTEGER m_liSize;
   LARGE_INTEGER m_liPos;
   
   file_size_t internal_rw( void *buffer, const file_size_t len, bool rw, bool bFile );
   bool m_bOvlFiles;

public:
   OSFileFuncWin( void *descriptor = 0 );

   ~OSFileFuncWin() { CloseHandle( m_evtComplete ); }
   
   virtual CffStatus open(
      std::string filespec,             // the file name
      OpenMode openMode = OM_RO,        // open mode
      LockMode lockMode = LM_SHARED   // the file lock mode
      );

   virtual CffStatus create(
      std::string filespec,               // the file name
      CreateMode cMode = CM_ARCHIVE,            // system atrribute
      LockMode lockMode = LM_EXCLUSIVE  // the file lock mode
      );


   inline virtual void getDescriptor( void *data ) const
   {
      *static_cast<HANDLE *>(data) = m_handle;
   }

   inline virtual void setDescriptor( void *data )
   {
      m_handle = *static_cast<HANDLE *>(data);
   }

   virtual file_size_t read( void *buffer, const file_size_t len ) {
      return OSFileFuncWin::internal_rw( buffer, len, true, true );
   }

   virtual file_size_t write( void *buffer, const file_size_t len )
   {
      return OSFileFuncWin::internal_rw( buffer, len, false, true );
   }
   
   virtual file_size_t seek(
      const file_size_t position,
      const SeekWhence swFrom= SW_FROM_BEGIN
      );
   
   virtual CffStatus close();

   inline virtual void setStdIn() { 
      m_handle = GetStdHandle( STD_INPUT_HANDLE ); 
      // Consoles are unoverlayable also in XP
      if ( GetFileType( m_handle ) == FILE_TYPE_CHAR )
         m_bOvlFiles = false;
   }
      
   inline virtual void setStdOut(){ 
      m_handle = GetStdHandle( STD_OUTPUT_HANDLE ); 
     // Consoles are unoverlayable also in XP
      if ( GetFileType( m_handle ) == FILE_TYPE_CHAR )
         m_bOvlFiles = false;
   }

   inline virtual void setStdErr(){ 
      m_handle = GetStdHandle( STD_ERROR_HANDLE );
      // Consoles are unoverlayable also in XP
      if ( GetFileType( m_handle ) == FILE_TYPE_CHAR )
         m_bOvlFiles = false;
   }
};

typedef OSFileFuncWin OSFileFunc;

} // namespace

#endif

/* end of wefts_coffee_unix.h */

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