Add a new type of automata: State-labeled Alternating Büchi

Automata (SABA).

* src/saba/saba.hh, src/saba/saba.cc, src/saba/sabastate.hh,
src/saba/sabasucciter.hh: New.  Interface for
SABA (State-labeled Alternating Büchi Automata).
* src/saba/explicitstateconjunction.cc,
src/saba/explicitstateconjunction.hh: New.  Default
implementation for a conjunction of states.
* src/saba/Makefile.am: New.
* src/Makefile.am, configure.ac: Adjust.
* src/sabaalgos/sabareachiter.cc,
src/sabaalgos/sabareachiter.hh: New.  Iterate over all reachable
states of a spot::saba.
* src/sabaalgos/sabadotty.cc, src/sabaalgos/sabadotty.hh: New.
Print reachable states in dot format.
* src/sabaalgos/Makefile.am: New.

src/sabaalgos/sabadotty.cc

@@ -0,0 +1,111 @@
+// Copyright (C) 2009  Laboratoire d'Informatique de Paris 6 (LIP6),
+// département Systèmes Répartis Coopératifs (SRC), Université Pierre
+// et Marie Curie.
+//
+// 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 2 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 Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#include <ostream>
+#include "saba/saba.hh"
+#include "sabadotty.hh"
+#include "tgba/bddprint.hh"
+#include "sabareachiter.hh"
+#include "misc/escape.hh"
+
+namespace spot
+{
+  namespace
+  {
+    class saba_dotty_bfs : public saba_reachable_iterator_breadth_first
+    {
+    public:
+      saba_dotty_bfs(std::ostream& os, const saba* a)
+	: saba_reachable_iterator_breadth_first(a), os_(os)
+      {
+      }
+
+      void
+      start()
+      {
+	os_ << "digraph G {" << std::endl;
+	os_ << "  0 [label=\"\", style=invis, height=0]" << std::endl;
+	os_ << "  0 -> 1;" << std::endl;
+      }
+
+      void
+      end()
+      {
+	os_ << "}" << std::endl;
+      }
+
+      void
+      process_state(const saba_state* s, int n)
+      {
+        std::string label =
+          escape_str(automata_->format_state(s))
+          + "\\n"
+          + bdd_format_accset(automata_->get_dict(),
+			      s->acceptance_conditions());
+	os_ << "  " << n << " "
+	    << "[label=\"" << label << "\"];"
+	    << std::endl;
+      }
+
+      void
+      process_state_conjunction(const saba_state*, int in,
+                                const saba_state_conjunction*,
+                                int sc_id,
+                                const saba_succ_iterator* si)
+      {
+        os_ << "  s" << in << "sc" << sc_id
+            << " [label=\"\", style=invis, height=0];" << std::endl;
+
+	std::string label =
+	  bdd_format_formula(automata_->get_dict(),
+			     si->current_condition());
+
+	os_ << "  " << in << " -> s" << in << "sc" << sc_id
+	    << " [label=\"" << label << "\", arrowhead=\"none\"];"
+	    << std::endl;
+      }
+
+      void
+      process_link(const saba_state*, int in,
+		   const saba_state*, int out,
+                   const saba_state_conjunction*,
+                   int sc_id,
+                   const saba_succ_iterator*)
+      {
+        os_ << "  s" << in << "sc" << sc_id << " -> " << out
+	    << " [label=\"\"];"
+	    << std::endl;
+      }
+
+    private:
+      std::ostream& os_;
+    };
+  }
+
+  std::ostream&
+  saba_dotty_reachable(std::ostream& os, const saba* g)
+  {
+    saba_dotty_bfs d(os, g);
+    d.run();
+    return os;
+  }
+
+}