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/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program 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 (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
/**
* @author Maarten Gribnau
* @date March 8, 2001
*/
#ifndef _H_IMG_MemPtr
#define _H_IMG_MemPtr
#include <stddef.h>
/**
* A memory pointer for memory of any type.
* It can be used to avoid memory leaks when allocating memory in constructors.
* @author Maarten Gribnau
* @date March 8, 2001
*/
template <class T> class IMG_MemPtr {
public:
/** Pointer to the memory */
T* m_p;
bool m_owned;
/**
* Size exception.
* A size exception is thrown when an invalid width and/or height is passed.
*/
class Size {};
/**
* Memory exception.
* A size exception is thrown when a there is not enough memory to allocate the image.
*/
class Memory {};
/**
* Constructs a memory pointer.
* @param s requested size of the pointer
* @throw <Size> when an invalid width and/or height is passed.
* @throw <Memory> when a there is not enough memory to allocate the image.
*/
IMG_MemPtr(size_t s)
: m_p(0), m_owned(false)
{
if (s > 0) {
m_p = new T[s];
if (!m_p) {
throw Memory();
}
m_owned = true;
}
else {
throw Size();
}
}
/**
* Constructs a memory pointer from a pointer.
* @param p the pointer
* @param s requested size of the pointer
* @throw <Size> when an invalid width and/or height is passed.
*/
IMG_MemPtr(void* p, size_t s)
: m_p(0), m_owned(false)
{
if (p && (s > 0)) {
m_p = (T*)p;
}
else {
throw Size();
}
}
/**
* Destructor.
*/
~IMG_MemPtr() { if (m_p && m_owned) { delete [] m_p; m_p = 0; } }
/**
* Access to the memory.
* @return pointer to the memory
*/
operator T*() { return m_p; }
};
#endif // _H_IMG_MemPtr
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