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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 State numbering and late graph restructuring code.
*/
#ifndef NG_RESTRUCTURING_H
#define NG_RESTRUCTURING_H
#include "ng_holder.h"
#include "ue2common.h"
#include "util/flat_containers.h"
#include <unordered_map>
namespace ue2 {
/**
* \brief Special state index value meaning that the vertex will not
* participate in an (NFA/DFA/etc) implementation.
*/
static constexpr u32 NO_STATE = ~0;
/**
* \brief Gives each participating vertex in the graph a unique state index.
*/
std::unordered_map<NFAVertex, u32>
numberStates(NGHolder &h, const flat_set<NFAVertex> &tops);
/**
* \brief Counts the number of states (vertices with state indices) in the
* graph.
*/
u32 countStates(const std::unordered_map<NFAVertex, u32> &state_ids);
} // namespace ue2
#endif
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