StdVectorPtr.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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
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//
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//    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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_StdVector4_H__AD959187_7A1C_11D2_957C_00A0C9A4CA3E__INCLUDED_)
#define AFX_StdVector4_H__AD959187_7A1C_11D2_957C_00A0C9A4CA3E__INCLUDED_

#include <vector>
#include <stdexcept>

// same as std::vector regarding the interface, but handles pointers.
template <class T>
class StdVectorPtr
{
 public:
        StdVectorPtr(size_t capacity = 0) : data(capacity) {}
        ~StdVectorPtr() { clear(); }

        void resize(size_t newsize) 
        {
                if (newsize < size()) 
                {
                        for (size_t i = newsize; i < size(); ++i) 
                        {
                                delete data[i];
                                // set to zero, because if resize throws an exception,
                                // objects could get destructed twice
                                data[i] = 0;
                        }
                }
                data.resize(newsize);
        }
        size_t size() const { return data.size(); }
        size_t capacity() const { return data.capacity(); }
        void clear() 
        {
                for (size_t i = 0; i < size(); i++) 
                {
                        delete data[i];
                        // set to zero, because if clear throws an exception,
                        // objects could get destructed twice
                        data[i] = 0;
                }
                data.clear();
        }

        // exception safe, so first create space, then store
        void push_back(std::auto_ptr<T> ptr) 
        {
                data.push_back(0);
                data.back() = ptr.release();
        }

        T* const& operator[](size_t n) const { return data[n]; }
        T* const& at(size_t n) const { return data.at(n); }

        void reset(size_t n, T* ptr) { delete data[n]; data[n] = ptr; }
        bool empty() const { return data.empty(); }

 protected:
        std::vector<T*> data;

 private:
        StdVectorPtr(const StdVectorPtr& );
        StdVectorPtr& operator= (const StdVectorPtr& );
};


#endif // !defined(AFX_StdVector4_H__AD959187_7A1C_11D2_957C_00A0C9A4CA3E__INCLUDED_)

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