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55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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.
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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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef COMMON_HASH_PTR_H
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#define COMMON_HASH_PTR_H
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#include "common/func.h"
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namespace Common {
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/**
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* @defgroup common_hashmap_ptr Hash table pointer
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* @ingroup common_hashmap
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*
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* @brief Template for a HashMap pointer.
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*
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* @{
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*/
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/**
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* Partial specialization of the Hash functor to be able to use pointers as HashMap keys
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*/
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template<typename T>
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struct Hash<T *> {
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uint operator()(T * const &v) const {
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uint x = static_cast<uint>(reinterpret_cast<uintptr>(v));
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return x + (x >> 3);
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}
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};
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/** @} */
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} // End of namespace Common
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#endif
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