FragmentedFile.h

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//
// FragmentedFile.h
//
// Copyright (c) Shareaza Development Team, 2002-2005.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza is free software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Shareaza is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#if !defined(AFX_FRAGMENTEDFILE_H__03EF9CB6_10EC_43A5_B6E0_D74B54044B51__INCLUDED_)
#define AFX_FRAGMENTEDFILE_H__03EF9CB6_10EC_43A5_B6E0_D74B54044B51__INCLUDED_

#pragma once

#include "FileFragments.hpp"

class CTransferFile;
class CEDPartImporter;

class CFragmentedFile
{
// Construction
public:
        CFragmentedFile();
        virtual ~CFragmentedFile();

// Attributes
protected:
        CTransferFile*  m_pFile;
        QWORD                   m_nUnflushed;

private:
    FF::SimpleFragmentList m_oFList;
        
// Operations
public:
        BOOL                    Create(LPCTSTR pszFile, QWORD nLength);
        BOOL                    Open(LPCTSTR pszFile);
        BOOL                    Flush();
        void                    Close();
        void                    Clear();
        BOOL                    MakeComplete();
        void                    Serialize(CArchive& ar, int nVersion);
public:
        BOOL                    IsPositionRemaining(QWORD nOffset) const;
        BOOL                    DoesRangeOverlap(QWORD nOffset, QWORD nLength) const;
        QWORD                   GetRangeOverlap(QWORD nOffset, QWORD nLength) const;
        BOOL                    WriteRange(QWORD nOffset, LPCVOID pData, QWORD nLength);
        BOOL                    ReadRange(QWORD nOffset, LPVOID pData, QWORD nLength);
        QWORD                   InvalidateRange(QWORD nOffset, QWORD nLength);
        
// Operations
public:
        inline BOOL IsValid() const
        {
                return m_oFList.limit() > 0; // && this != NULL
        }
        
        inline BOOL IsOpen() const
        {
                return m_pFile != NULL;// && this != NULL
        }

        inline QWORD GetTotal() const
        {
                return m_oFList.limit();
        }
        
        inline QWORD GetRemaining() const
        {
                return m_oFList.sumLength();
        }
        
        inline QWORD GetCompleted() const
        {
                return m_oFList.missing();
        }
        
    const FF::SimpleFragmentList& GetEmptyFragmentList() const
    {
        return m_oFList;
    }
        
        inline QWORD GetEmptyFragmentCount() const
        {
                return m_oFList.size();
        }
        
        inline BOOL IsFlushNeeded() const
        {
                return ( m_pFile != NULL ) && ( m_nUnflushed > 0 );
        }

        friend class CEDPartImporter;
};


#endif // !defined(AFX_FRAGMENTEDFILE_H__03EF9CB6_10EC_43A5_B6E0_D74B54044B51__INCLUDED_)

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