autfilt: new --separate-sets option

* src/twaalgos/sepsets.cc, src/twaalgos/sepsets.hh: New files.
* src/twaalgos/Makefile.am: Add them.
* src/twa/acc.hh (get_acceptance): Add a non-const version.
* src/bin/autfilt.cc: Add the --separate-sets option.
* src/tests/sepsets.test: New file.
* src/tests/Makefile.am: Add it.

src/twaalgos/sepsets.hh

@@ -0,0 +1,36 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2015 Laboratoire de Recherche et Développement
+// de l'Epita.
+//
+// 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 "twa/twagraph.hh"
+
+namespace spot
+{
+  /// \brief Whether the Inf and Fin numbers are disjoints
+  SPOT_API bool
+  has_separate_sets(const const_twa_graph_ptr& aut);
+
+  /// \brief Separate the Fin and Inf sets used by an automaton
+  ///
+  /// This makes sure that the numbers used a Fin and Inf are
+  /// disjoints.
+  SPOT_API twa_graph_ptr
+  separate_sets_here(const twa_graph_ptr& aut);
+}