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https://github.com/VectorCamp/vectorscan.git
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92 lines
3.0 KiB
C++
92 lines
3.0 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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#ifndef RDFA_H
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#define RDFA_H
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#include "nfa_kind.h"
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#include "ue2common.h"
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#include "util/ue2_containers.h"
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#include <array>
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#include <vector>
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namespace ue2 {
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typedef u16 dstate_id_t;
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typedef u16 symbol_t;
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static constexpr symbol_t TOP = 256;
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static constexpr symbol_t ALPHABET_SIZE = 257;
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static constexpr symbol_t N_SPECIAL_SYMBOL = 1;
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static constexpr dstate_id_t DEAD_STATE = 0;
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/** Structure representing a dfa state during construction. */
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struct dstate {
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/** Next state; indexed by remapped sym */
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std::vector<dstate_id_t> next;
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/** Set by ng_mcclellan, refined by mcclellancompile */
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dstate_id_t daddy = 0;
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/** Set by mcclellancompile, implementation state id, excludes edge
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* decorations */
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dstate_id_t impl_id = 0;
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/** Reports to fire (at any location). */
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flat_set<ReportID> reports;
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/** Reports to fire (at EOD). */
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flat_set<ReportID> reports_eod;
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explicit dstate(size_t alphabet_size) : next(alphabet_size, 0) {}
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};
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struct raw_dfa {
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nfa_kind kind;
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std::vector<dstate> states;
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dstate_id_t start_anchored = DEAD_STATE;
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dstate_id_t start_floating = DEAD_STATE;
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u16 alpha_size = 0; /* including special symbols */
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/* mapping from input symbol --> equiv class id */
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std::array<u16, ALPHABET_SIZE> alpha_remap;
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explicit raw_dfa(nfa_kind k) : kind(k) {}
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virtual ~raw_dfa();
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u16 getImplAlphaSize() const;
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virtual void stripExtraEodReports(void);
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bool hasEodReports(void) const;
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};
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}
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#endif
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