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/* 
 * Copyright (c) 2015-2017, Intel Corporation
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met: 
 * 
 *  * Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 *  * Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *  * Neither the name of Intel Corporation nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE. 
 */ 
 
/** \file 
 * \brief Loose equality testing for NGHolder graphs. 
 * 
 * Loose equality check for holders' graph structure and vertex_index, 
 * vertex_char_reach and (optionally reports). 
 */ 
 
#ifndef NG_IS_EQUAL_H 
#define NG_IS_EQUAL_H 
 
#include "ue2common.h" 
 
#include <memory> 
 
namespace ue2 { 
 
class NGHolder; 
 
bool is_equal(const NGHolder &a, const NGHolder &b); 
bool is_equal(const NGHolder &a, ReportID a_r, const NGHolder &b, ReportID b_r); 
 
u64a hash_holder(const NGHolder &g); 
 
// Util Functors
struct NGHolderHasher {
    size_t operator()(const std::shared_ptr<const NGHolder> &h) const {
        return hash_holder(*h);
    }
    size_t operator()(const std::shared_ptr<NGHolder> &h) const {
        return hash_holder(*h);
    }
};

struct NGHolderEqual { 
    bool operator()(const std::shared_ptr<const NGHolder> &a, 
                    const std::shared_ptr<const NGHolder> &b) const { 
        return is_equal(*a, *b); 
    } 
}; 
 
} // namespace ue2 
 
#endif // NG_IS_EQUAL_H