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https://github.com/VectorCamp/vectorscan.git
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100 lines
3.5 KiB
C++
100 lines
3.5 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 Builder: used by Glushkov construction to construct an
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* NGWrapper from a parsed expression.
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*/
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#ifndef NG_BUILDER_H
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#define NG_BUILDER_H
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#include "ue2common.h"
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#include "parser/position.h"
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#include <memory>
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#include <boost/core/noncopyable.hpp>
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namespace ue2 {
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class CharReach;
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class NGWrapper;
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class ReportManager;
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struct CompileContext;
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class ParsedExpression;
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/** \brief Abstract builder interface. Use \ref makeNFABuilder to construct
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* one. Used by GlushkovBuildState. */
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class NFABuilder : boost::noncopyable {
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public:
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virtual ~NFABuilder();
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virtual Position makePositions(size_t nPositions) = 0;
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virtual Position getStart() const = 0;
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virtual Position getStartDotStar() const = 0;
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virtual Position getAccept() const = 0;
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virtual Position getAcceptEOD() const = 0;
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virtual bool isSpecialState(Position p) const = 0;
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virtual void setNodeReportID(Position position, int offsetAdjust) = 0;
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virtual void addCharReach(Position position, const CharReach &cr) = 0;
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/* or-in vertex assertions */
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virtual void setAssertFlag(Position position, u32 flag) = 0;
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virtual u32 getAssertFlag(Position position) = 0;
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virtual void addVertex(Position p) = 0;
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virtual void addEdge(Position start, Position end) = 0;
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virtual bool hasEdge(Position start, Position end) const = 0;
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virtual u32 numVertices() const = 0;
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virtual void cloneRegion(Position first, Position last,
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unsigned posOffset) = 0;
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/**
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* \brief Returns the built NGWrapper graph.
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* Note that this builder cannot be used after this call.
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*/
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virtual std::unique_ptr<NGWrapper> getGraph() = 0;
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};
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/** Construct a usable NFABuilder. */
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std::unique_ptr<NFABuilder> makeNFABuilder(ReportManager &rm,
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const CompileContext &cc,
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const ParsedExpression &expr);
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} // namespace ue2
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#endif
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