kicad/include/hash_eda.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 CERN
* Copyright (C) 2020-2021 KiCad Developers, see AUTHORS.txt for contributors.
*
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* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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 HASH_EDA_H_
#define HASH_EDA_H_
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/**
* @brief Hashing functions for EDA_ITEMs.
*/
#include <cstdlib>
#include <functional>
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class EDA_ITEM;
///< Enables/disables properties that will be used for calculating the hash.
///< The properties might be combined using the bitwise 'or' operator.
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enum HASH_FLAGS
{
HASH_POS = 0x01,
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///< use coordinates relative to the parent object
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REL_COORD = 0x02,
///< use coordinates relative to the shape position
REL_POS = 0x04,
HASH_ROT = 0x08,
HASH_LAYER = 0x10,
HASH_NET = 0x20,
HASH_REF = 0x40,
HASH_VALUE = 0x80,
HASH_ALL = 0xff
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};
/**
* Calculate hash of an EDA_ITEM.
*
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* @param aItem is the item for which the hash will be computed.
* @return Hash value.
*/
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std::size_t hash_fp_item( const EDA_ITEM* aItem, int aFlags = HASH_FLAGS::HASH_ALL );
#endif