mapnik/include/coord_array.hpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

//$Id: coord_array.hpp 39 2005-04-10 20:39:53Z pavlenko $

#ifndef COORD_ARRAY_HPP
#define COORD_ARRAY_HPP

#include "coord.hpp"
#include <cassert>

namespace mapnik
{

    template <typename T>
    class coord_array 
    {   
	typedef T coord_type;
	coord_type* pt_;
	const unsigned size_;
    public:	
	coord_array(unsigned size=0)
	    : pt_(static_cast<coord_type*>(size==0?0: ::operator new (sizeof(coord_type)*size))),
	      size_(size) {}
	
	coord_array(const coord_array& rhs)
	    : pt_(static_cast<coord_type*>(rhs.size_==0?0: ::operator new (sizeof(coord_type)*rhs.size_))),
	      size_(rhs.size_) {
	    memcpy(pt_,rhs.pt_,sizeof(coord_type)*rhs.size_);
	}
	
	~coord_array() 
	{
	    ::operator delete (pt_);
	}
	
	unsigned size() const 
	{
	    return size_;
	}
	
	void set(unsigned index,double x,double y)
	{
	    assert(index<size_);
	    pt_[index].x=x;
	    pt_[index].y=y;
	}
	
	const coord_type& at(unsigned index) const 
	{
	    assert(index<size_);
	    return pt_[index];
	}
	
	const coord_type& operator[] (unsigned index) const
	{
	    assert (index<size_);
	    return pt_[index];
	}
	
	coord_type& operator[] (unsigned index)
	{
	    assert (index<size_);
	    return pt_[index];
	}
	
    private:
	coord_array& operator=(const coord_array&);
    };
}


#endif //COORD_ARRAY_HPP