116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
/**
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* $Id$
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*
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* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL/BL DUAL LICENSE BLOCK *****
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* @author Maarten Gribnau
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* @date March 8, 2001
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*/
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#ifndef _H_IMG_MemPtr
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#define _H_IMG_MemPtr
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#include <stddef.h>
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/**
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* A memory pointer for memory of any type.
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* It can be used to avoid memory leaks when allocating memory in constructors.
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* @author Maarten Gribnau
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* @date March 8, 2001
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*/
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template <class T> class IMG_MemPtr {
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public:
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/** Pointer to the memory */
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T* m_p;
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bool m_owned;
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/**
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* Size exception.
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* A size exception is thrown when an invalid width and/or height is passed.
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*/
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class Size {};
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/**
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* Memory exception.
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* A size exception is thrown when a there is not enough memory to allocate the image.
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*/
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class Memory {};
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/**
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* Constructs a memory pointer.
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* @param s requested size of the pointer
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* @throw <Size> when an invalid width and/or height is passed.
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* @throw <Memory> when a there is not enough memory to allocate the image.
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*/
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IMG_MemPtr(size_t s)
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: m_p(0), m_owned(false)
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{
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if (s > 0) {
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m_p = new T[s];
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if (!m_p) {
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throw Memory();
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}
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m_owned = true;
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}
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else {
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throw Size();
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}
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}
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/**
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* Constructs a memory pointer from a pointer.
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* @param p the pointer
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* @param s requested size of the pointer
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* @throw <Size> when an invalid width and/or height is passed.
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*/
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IMG_MemPtr(void* p, size_t s)
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: m_p(0), m_owned(false)
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{
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if (p && (s > 0)) {
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m_p = (T*)p;
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}
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else {
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throw Size();
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}
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}
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/**
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* Destructor.
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*/
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~IMG_MemPtr() { if (m_p && m_owned) { delete [] m_p; m_p = 0; } }
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/**
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* Access to the memory.
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* @return pointer to the memory
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*/
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operator T*() { return m_p; }
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};
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#endif // _H_IMG_MemPtr
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