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Introduce a translator class.

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This perform pre- and post-processings in addition to
the LTL-to-TGBA translation.

* src/tgbaalgos/translate.cc, src/tgbaalgos/translate.hh: New files.
* src/tgbaalgos/Makefile.am: Add them.
* src/tgbaalgos/postproc.hh: Make the private part protected, so
that we can inherit from that in the translator class.
* src/bin/ltl2tgba.cc: Use the translator class to hide LTL
simplification, translation, and postprocessings.
* NEWS: Mention it.
This commit is contained in:
Alexandre Duret-Lutz 2013-03-25 19:21:09 +01:00
parent 0edb2b7a17
commit c5b7e8e1da
6 changed files with 219 additions and 30 deletions
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src/tgbaalgos/translate.cc Normal file
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// -*- coding: utf-8 -*-
// Copyright (C) 2013 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
//
// 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/>.
#include "translate.hh"
#include "ltl2tgba_fm.hh"
namespace spot
{
void translator::build_simplifier(bdd_dict* dict)
{
ltl::ltl_simplifier_options options(false, false, false);
switch (level_)
{
case High:
options.containment_checks = true;
options.containment_checks_stronger = true;
// fall through
case Medium:
options.synt_impl = true;
// fall through
case Low:
options.reduce_basics = true;
options.event_univ = true;
// fall through
}
simpl_owned_ = simpl_ = new ltl::ltl_simplifier(options, dict);
}
const tgba* translator::run(const ltl::formula** f)
{
const ltl::formula* r = simpl_->simplify(*f);
(*f)->destroy();
*f = r;
// This helps ltl_to_tgba_fm() to order BDD variables in a more
// natural way (improving the degeneralization).
simpl_->clear_as_bdd_cache();
bool exprop = level_ == spot::postprocessor::High;
const tgba* aut = ltl_to_tgba_fm(r, simpl_->get_dict(), exprop);
aut = this->postprocessor::run(aut, r);
return aut;
}
const tgba* translator::run(const ltl::formula* f)
{
f->clone();
const tgba* aut = run(&f);
f->destroy();
return aut;
}
}