reachiter.hh

// -*- coding: utf-8 -*-
// Copyright (C) by the Spot authors, see the AUTHORS file for details.
//
// This file is part of Spot, a model checking library.
//
// Spot is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// Spot is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
#pragma once
 
#include <spot/misc/hash.hh>
#include <spot/ta/ta.hh>
#include <stack>
#include <deque>
 
namespace spot
{
  class SPOT_API ta_reachable_iterator
  {
  public:
    ta_reachable_iterator(const const_ta_ptr& a);
    virtual
    ~ta_reachable_iterator();

    void
    run();

    virtual void
    add_state(const state* s) = 0;
    virtual const state*
    next_state() = 0;

    virtual bool
    want_state(const state* s) const;

    virtual void
    start();
    virtual void
    end();

    virtual void
    process_state(const state* s, int n);
    virtual void
    process_link(int in, int out, const ta_succ_iterator* si);
 
  protected:
 
    const_ta_ptr t_automata_; 
 
    state_map<int> seen; 
  };

  class SPOT_API ta_reachable_iterator_depth_first
    : public ta_reachable_iterator
  {
  public:
    ta_reachable_iterator_depth_first(const const_ta_ptr& a);
 
    virtual void add_state(const state* s) override;
    virtual const state* next_state() override;
 
  protected:
    std::stack<const state*> todo; 
  };

  class SPOT_API ta_reachable_iterator_breadth_first
    : public ta_reachable_iterator
  {
  public:
    ta_reachable_iterator_breadth_first(const const_ta_ptr& a);
 
    virtual void add_state(const state* s) override;
    virtual const state* next_state() override;
 
  protected:
    std::deque<const state*> todo; 
  };
}