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89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
/*****************************************************************************
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* Eliot
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* Copyright (C) 2005-2007 Antoine Fraboulet
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* Authors: Antoine Fraboulet <antoine.fraboulet @@ free.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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#ifndef _DIC_AUTOMATON_H_
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#define _DIC_AUTOMATON_H_
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class AutomatonHelper;
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struct searchRegExpLists;
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class Automaton
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{
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public:
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/// Constructor
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/**
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* Build a static deterministic finite automaton from
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* "init_state", "ptl" and "PS" given by the parser
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*/
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Automaton(uint64_t init_state, int *ptl, uint64_t *PS,
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const searchRegExpLists &iList);
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/// Destructor
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~Automaton();
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/**
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* Get the number of states in the automaton.
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* @returns number of states
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*/
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int getNbStates() const { return m_nbStates; }
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/**
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* Query the id of the init state.
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* @returns init state id
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*/
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int getInitId() const { return m_init; }
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/**
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* Query the acceptor flag for the given state
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* @return true/false
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*/
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bool accept(uint64_t state) const { return m_acceptors[state]; }
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/**
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* Return the next state when the transition is taken
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* @returns next state id (1 <= id <= nstate, 0 = invalid id)
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*/
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uint64_t getNextState(uint64_t start, char l) const
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{
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return m_transitions[start][(int)l];
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}
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/**
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* Dump the automaton into a file (for debugging purposes)
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*/
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void dump(const string &iFileName) const;
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private:
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/// Number of states
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unsigned int m_nbStates;
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/// ID of the init state
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uint64_t m_init;
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/// Array of booleans, one for each state
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bool *m_acceptors;
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/// Matrix of transitions
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int **m_transitions;
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void finalize(const AutomatonHelper &a);
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};
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#endif /* _DIC_AUTOMATON_H_ */
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