AsyncResolverHostsDB.h

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/*  AsyncResolver.h - simple asynchronous DNS resolver stub
    Copyright (C) 2004 Mark Weaver
    Written by Mark Weaver <mark@npsl.co.uk>

    Part of the Open-Win32 library.
    This library 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 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the
    Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA  02111-1307, USA.
*/

/* Copyright 1998 by the Massachusetts Institute of Technology.
 *
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 */

#ifndef OW32_AsyncResolverHostsDB_h
#define OW32_AsyncResolverHostsDB_h

#include <OW32/windows.h>
#include <OW32/RefCounted.h>

#include <OW32/AsyncResolverError.h>

namespace OW32
{

#ifdef _MSC_VER
#pragma warning(disable: 4251)
#endif

class OW32_LIB_EXPORT CAsyncResolverHostsDB : public CRefCounted
{
public:
    CAsyncResolverHostsDB();

    ~CAsyncResolverHostsDB();

    AsyncResolverError read(const TCHAR *hostsPath);

    AsyncResolverError nameQuery(const char *name, struct hostent **host) const;

    AsyncResolverError addrQuery(const struct in_addr *addr, struct hostent **host) const;

private:
    // prohibit copy and assignment
    CAsyncResolverHostsDB(const CAsyncResolverHostsDB &);
    CAsyncResolverHostsDB& operator=(const CAsyncResolverHostsDB &);

    struct impl;
    impl *m_impl;
};

typedef CAutoRefCountedPtr<const CAsyncResolverHostsDB> CAsyncResolverHostsDBPtr;

#ifdef _MSC_VER
#pragma warning(default: 4251)
#endif

}; // namespace OW32

#endif // OW32_AsyncResolverHostsDB_h

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