localscopeallocator.hxx

sip中的md5测试源码,可以进行md5加密认证的

#ifndef LOCALSCOPEALLOCATOR_H
#define LOCALSCOPEALLOCATOR_H

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */


static const char* const LocalScopeAllocator_v = "$Id: LocalScopeAllocator.hxx,v 1.3.24.1 2003/01/30 22:39:09 bko Exp $";

#include <cassert>

/** LocalScopeAllocator allocates memory on the heap and frees it when
 * scope ends.  It is used to provide thread-local buffers to Data.
 *
 */

class LocalScopeAllocator
{

    public:
        ///
        LocalScopeAllocator(): _memArea(0) { };
        ///
        LocalScopeAllocator(int len)
        {
            _memArea = new char[len];
            memset(_memArea, 0, len);
        } 
        ///
        LocalScopeAllocator( char**buf, int len ) 
        {
            *buf = _memArea = new char[len];
            memset(_memArea, 0, len);
        }
        ///
        virtual ~LocalScopeAllocator( )
        {
            delete [] _memArea;
        }
 
        void allocate(int len)
        {
            delete [] _memArea;
            _memArea = new char[len];
            memset(_memArea, 0, len);
        }

        operator const char*() const
        {
            return _memArea;
        }

        operator void*() const
        {
            return _memArea;
        }
    private:
        ///
        char* _memArea;
};

//LOCAL_SCOPE_ALLOCATOR_H
#endif