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72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
/*
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* Copyright (c) 2015, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* \brief NFA graph state squashing analysis.
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*/
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#ifndef NG_SQUASH_H
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#define NG_SQUASH_H
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#include "ng_holder.h"
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#include "som/som.h"
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#include "ue2common.h"
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#include "util/ue2_containers.h"
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#include <map>
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#include <boost/dynamic_bitset.hpp>
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namespace ue2 {
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class NGHolder;
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class ReportManager;
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/** Dynamically-sized bitset, as an NFA can have an arbitrary number of states. */
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typedef boost::dynamic_bitset<> NFAStateSet;
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/**
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* Populates the squash mask for each vertex (i.e. the set of states to be left
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* on during squashing).
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*
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* The NFAStateSet in the output map is indexed by vertex_index.
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*/
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std::map<NFAVertex, NFAStateSet> findSquashers(const NGHolder &g,
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som_type som = SOM_NONE);
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/** Filters out squash states intended only for use in DFA construction. */
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void filterSquashers(const NGHolder &g,
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std::map<NFAVertex, NFAStateSet> &squash);
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/** Populates squash masks for states that can be switched off by highlander
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* (single match) reporters. */
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std::map<NFAVertex, NFAStateSet>
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findHighlanderSquashers(const NGHolder &g, const ReportManager &rm);
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} // namespace ue2
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#endif // NG_SQUASH_H
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