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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/* This file is part of KDevelop
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Copyright 2012 Olivier de Gaalon <olivier.jg@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef KDEVPLATFORM_KDEVHASH_H
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#define KDEVPLATFORM_KDEVHASH_H
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//Partial one at a time hash, starting with fnv prime
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class KDevHash
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{
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public:
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KDevHash() : m_hash(2166136261u) {}
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KDevHash(uint hash) : m_hash(hash) {}
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operator unsigned int()
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{
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return m_hash;
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}
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template<typename T>
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KDevHash& operator<<(T addition)
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{
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const char *_data = (const char*)&addition;
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for (unsigned int i = 0; i < sizeof(T); ++i)
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{
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m_hash += _data[i];
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m_hash += ( m_hash << 10 );
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m_hash ^= ( m_hash >> 6 );
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}
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return *this;
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}
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private:
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KDevHash(const KDevHash&);
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KDevHash operator=(const KDevHash&);
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unsigned int m_hash;
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};
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#endif //KDEVPLATFORM_KDEVHASH_H
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