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Diffstat (limited to 'intern/img/intern/IMG_MemPtr.h')
-rw-r--r-- | intern/img/intern/IMG_MemPtr.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/intern/img/intern/IMG_MemPtr.h b/intern/img/intern/IMG_MemPtr.h new file mode 100644 index 00000000000..e81a5b5c873 --- /dev/null +++ b/intern/img/intern/IMG_MemPtr.h @@ -0,0 +1,117 @@ +/** + * $Id$ + * ***** 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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