node_set_impl.hpp

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/*
 * 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. Neither the name of the Author nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 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
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/*
 * $Id: node_set_impl.hpp 55934 2012-10-10 15:55:27Z satskyse $
 */
 
/** @file
 * This file contains the definition of the xml::impl::nset_impl class.
**/
 
 
#ifndef _xmlwrapp_node_set_impl_hpp_
#define _xmlwrapp_node_set_impl_hpp_
 
 
// xmlwrapp includes
#include <misc/xmlwrapp/node.hpp>
 
// libxml2
#include <libxml/xpath.h>
 
namespace xml
{
    namespace impl
    {
        // Private implementation of the node_set class.
        // It holds the libxml2 pointer to the XPath query results and provides
        // the reference counting
        struct nset_impl
        {
            // XPath query results
            xmlXPathObjectPtr   results_;
 
            nset_impl(void* results);
            void inc_ref();
            void dec_ref();
            node &  get_reference(int  index);
            void set_ownership(bool  owe);
 
        protected:
            ~nset_impl();
 
        private:
            size_t  refcnt_;    // reference counter
            bool    owe_;
        };
    }
 
} // namespace xml
 
#endif