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82 lines
2.9 KiB
C++
82 lines
2.9 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 merging ("uncalc")
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*/
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#ifndef NG_UNCALC_COMPONENTS_H
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#define NG_UNCALC_COMPONENTS_H
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#include <map>
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#include <vector>
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#include "nfagraph/ng_graph.h"
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#include "util/ue2_containers.h"
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namespace ue2 {
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struct CompileContext;
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struct Grey;
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class NGHolder;
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class ReportManager;
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/**
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* \brief Returns the common prefix length for a pair of graphs.
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*
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* The CPL is calculated based the topological ordering given by the state
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* indices for each graph.
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*/
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u32 commonPrefixLength(const NGHolder &ga,
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const ue2::unordered_map<NFAVertex, u32> &a_state_ids,
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const NGHolder &gb,
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const ue2::unordered_map<NFAVertex, u32> &b_state_ids);
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/**
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* \brief Merge the group of graphs in \p cluster where possible.
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*
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* The (from, to) mapping of merged graphs is returned in \p merged.
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*/
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void mergeNfaCluster(const std::vector<NGHolder *> &cluster,
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const ReportManager *rm,
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std::map<NGHolder *, NGHolder *> &merged,
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const CompileContext &cc);
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/**
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* \brief Merge graph \p ga into graph \p gb.
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*
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* Returns false on failure. On success, \p gb is reduced via \ref
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* reduceImplementableGraph and renumbered.
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*/
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bool mergeNfaPair(NGHolder &ga, NGHolder &gb, const ReportManager *rm,
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const CompileContext &cc);
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} // namespace ue2
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#endif
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