ostrich.cesolver.automata.CEAutDatabase.scala Maven / Gradle / Ivy

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/**
 * This file is part of Ostrich, an SMT solver for strings.
 * Copyright (c) 2023 Denghang Hu. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of the authors nor the names of their
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package ostrich.cesolver.automata

import ostrich.OstrichStringTheory
import ostrich.automata.AutDatabase
import scala.collection.mutable.{HashMap => MHashMap}
import ap.parser.ITerm
import ostrich.automata.Automaton
import ostrich.automata.AutomataUtils

class CEAutDatabase(theory: OstrichStringTheory, minimizeAutomata: Boolean)
    extends AutDatabase(theory, minimizeAutomata) {

  import AutDatabase._
  override val regex2Aut = new Regex2CEAut(theory)

  override def id2ComplementedAutomaton(id: Int): Option[Automaton] =
    synchronized {
      (id2CompAut get id) match {
        case r @ Some(_) => r
        case None =>
          (id2Regex get id) match {
            case Some(regex) => {
              val aut =
                regex2Aut.buildComplementAut(regex)
              id2CompAut.put(id, aut)
              Some(aut)
            }
            case None =>
              None
          }
      }
    }

}