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https://github.com/VectorCamp/vectorscan.git
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66 lines
2.4 KiB
C++
66 lines
2.4 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 Reverse acceleration analysis.
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*/
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#ifndef NG_REVACC_H
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#define NG_REVACC_H
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#include "util/charreach.h"
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#include <vector>
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struct NFA;
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namespace ue2 {
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class NGHolder;
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#define MAX_RACCEL_OFFSET 16
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struct RevAccInfo {
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RevAccInfo(void);
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bool valid;
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std::vector<CharReach> acceptReach; /**< bytes which can appear n
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* bytes before a match */
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std::vector<CharReach> acceptEodReach; /**< bytes which can appear n
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* bytes before eod match */
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};
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void buildReverseAcceleration(struct NFA *nfa, const RevAccInfo &rev_info,
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u32 min_width, bool eod_only = false);
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void populateReverseAccelerationInfo(RevAccInfo &rai, const NGHolder &g);
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void mergeReverseAccelerationInfo(RevAccInfo &dest, const RevAccInfo &vic);
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} // namespace ue2
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#endif
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