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https://github.com/VectorCamp/vectorscan.git
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95 lines
3.6 KiB
C++
95 lines
3.6 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 Boundary assertions (^, $, \\A, \\Z, \\z)
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*/
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#ifndef _RE_COMPONENTBOUNDARY_H_
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#define _RE_COMPONENTBOUNDARY_H_
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#include "Component.h"
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#include "position.h"
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namespace ue2 {
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/** \brief Encapsulates a line/string boundary assertion. */
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class ComponentBoundary : public Component {
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friend class DumpVisitor;
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friend class PrintVisitor;
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friend class UnsafeBoundsVisitor;
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friend class MultilineVisitor;
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public:
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enum Boundary {
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BEGIN_STRING, //!< beginning of data stream
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END_STRING, //!< end of data stream
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END_STRING_OPTIONAL_LF, //!< end of data stream with an optional
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// linefeed
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BEGIN_LINE, //!< '(^|\\n)'
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END_LINE //!< '($|\\n)'
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};
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explicit ComponentBoundary(enum Boundary bound);
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~ComponentBoundary() override;
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ComponentBoundary *clone() const override;
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Component *accept(ComponentVisitor &v) override {
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Component *c = v.visit(this);
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v.post(this);
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return c;
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}
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void accept(ConstComponentVisitor &v) const override {
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v.pre(*this);
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v.during(*this);
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v.post(*this);
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}
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std::vector<PositionInfo> first() const override;
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std::vector<PositionInfo> last() const override;
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bool empty() const override;
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bool repeatable() const override;
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void notePositions(GlushkovBuildState &bs) override;
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void buildFollowSet(GlushkovBuildState &bs,
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const std::vector<PositionInfo> &lastPos) override;
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bool checkEmbeddedStartAnchor(bool at_start) const override;
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bool checkEmbeddedEndAnchor(bool at_end) const override;
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private:
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enum Boundary m_bound; //!< \brief which assertion is that?
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Position m_newline; //!< \brief special newline state
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std::vector<PositionInfo> m_first; //!< \brief positions returned for first()
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std::vector<PositionInfo> m_last; //!< \brief positions returned for last()
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ComponentBoundary(const ComponentBoundary &other);
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};
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} // namespace ue2
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#endif
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