HashDatabase.h

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//
// HashDatabase.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_HASHDATABASE_H__01733EE8_54F0_440D_BAD9_59EE0272DD1C__INCLUDED_)
#define AFX_HASHDATABASE_H__01733EE8_54F0_440D_BAD9_59EE0272DD1C__INCLUDED_

#pragma once

typedef struct
{
        DWORD nIndex;
        DWORD nOffset;
        DWORD nLength;
} HASHDB_INDEX_1000;

typedef struct
{
        DWORD nIndex;
        DWORD nType;
        DWORD nOffset;
        DWORD nLength;
} HASHDB_INDEX_1001, HASHDB_INDEX;

class CTigerTree;
class CED2K;


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

// Attributes
protected:
        CCriticalSection m_pSection;
protected:
        CString         m_sPath;
        CFile           m_pFile;
        BOOL            m_bOpen;
protected:
        DWORD                   m_nOffset;
        HASHDB_INDEX*   m_pIndex;
        DWORD                   m_nIndex;
        DWORD                   m_nBuffer;

// Operations
public:
        BOOL    Create();
        void    Close();
        BOOL    DeleteAll(DWORD nIndex);
protected:
        HASHDB_INDEX*   Lookup(DWORD nIndex, DWORD nType);
        HASHDB_INDEX*   PrepareToStore(DWORD nIndex, DWORD nType, DWORD nLength);
        BOOL                    Erase(DWORD nIndex, DWORD nType);
        void                    Commit();
public:
        BOOL    GetTiger(DWORD nIndex, CTigerTree* pTree);
        BOOL    StoreTiger(DWORD nIndex, CTigerTree* pTree);
        BOOL    DeleteTiger(DWORD nIndex);
public:
        BOOL    GetED2K(DWORD nIndex, CED2K* pSet);
        BOOL    StoreED2K(DWORD nIndex, CED2K* pSet);
        BOOL    DeleteED2K(DWORD nIndex);

};

extern CHashDatabase LibraryHashDB;

#endif // !defined(AFX_HASHDATABASE_H__01733EE8_54F0_440D_BAD9_59EE0272DD1C__INCLUDED_)

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