hashtables.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
 * Copyright (C) 2012-2020 KiCad Developers, see AUTHORS.TXT for contributors.
 *
 * 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.
 *
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */
 
#ifndef HASHTABLES_H_
#define HASHTABLES_H_
 
#include <unordered_map>
 
#include <wx/string.h>
 
// First some utility classes and functions
 
struct iequal_to
{
    bool operator()( const char* x, const char* y ) const
    {
        return !strcmp( x, y );
    }
};
 
 
struct fnv_1a
{
    std::size_t operator()( const char* it ) const
    {
        std::size_t hash = 2166136261u;
 
        for( ; *it; ++it )
        {
            hash ^= (unsigned char) *it;
            hash *= 16777619;
        }
        return hash;
    }
};
 
 
#ifdef SWIG
#define DECL_HASH_FOR_SWIG( TypeName, KeyType, ValueType )          \
    namespace std                                                   \
    {                                                               \
        % template( TypeName ) unordered_map<KeyType, ValueType>;   \
    }                                                               \
    typedef std::unordered_map<KeyType, ValueType> TypeName;
#else
#define DECL_HASH_FOR_SWIG( TypeName, KeyType, ValueType )          \
    typedef std::unordered_map<KeyType, ValueType> TypeName;
#endif
 
 
typedef std::unordered_map< const char*, int, fnv_1a, iequal_to > KEYWORD_MAP;
 
 
#endif // HASHTABLES_H_