spot  2.12.1
intersect.hh
1 // -*- coding: utf-8 -*-
2 // Copyright (C) by the Spot authors, see the AUTHORS file for details.
3 //
4 // This file is part of Spot, a model checking library.
5 //
6 // Spot is free software; you can redistribute it and/or modify it
7 // under the terms of the GNU General Public License as published by
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10 //
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14 // License for more details.
15 //
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17 // along with this program. If not, see <http://www.gnu.org/licenses/>.
18 
19 #pragma once
20 
21 #include <spot/kripke/kripke.hh>
22 #include <spot/twacube/twacube.hh>
23 #include <queue>
24 
25 namespace spot
26 {
32  template<typename SuccIterator, typename State>
33  static void forward_iterators(kripkecube<State, SuccIterator>& sys,
34  twacube_ptr twa,
35  SuccIterator* it_kripke,
36  std::shared_ptr<trans_index> it_prop,
37  bool just_visited,
38  unsigned tid)
39  {
40  (void) sys; // System is useless, but the API is clearer
41  SPOT_ASSERT(!(it_prop->done() && it_kripke->done()));
42 
43  // Sometimes kripke state may have no successors.
44  if (it_kripke->done())
45  return;
46 
47  // The state has just been visited and the 2 iterators intersect.
48  // There is no need to move iterators forward.
49  SPOT_ASSERT(!(it_prop->done()));
50  if (just_visited && twa->get_cubeset()
51  .intersect(twa->trans_data(it_prop, tid).cube_,
52  it_kripke->condition()))
53  return;
54 
55  // Otherwise we have to compute the next valid successor (if it exits).
56  // This requires two loops. The most inner one is for the twacube since
57  // its costless
58  if (it_prop->done())
59  it_prop->reset();
60  else
61  it_prop->next();
62 
63  while (!it_kripke->done())
64  {
65  while (!it_prop->done())
66  {
67  if (SPOT_UNLIKELY(twa->get_cubeset()
68  .intersect(twa->trans_data(it_prop, tid).cube_,
69  it_kripke->condition())))
70  return;
71  it_prop->next();
72  }
73  it_prop->reset();
74  it_kripke->next();
75  }
76  }
77 }
Definition: automata.hh:26

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