* src/tgba/bddprint.cc (dict): Make this variable static.

(want_prom): New global static variable.
(print_handle): Honor want_prom.
(print_sat_handler, bdd_print_sat, bdd_format_sat): New functions.
(bdd_print_set, bdd_print_dot, bdd_print_table): Set want_prom.
* src/tgba/bddprint.hh (bdd_print_sat, bdd_format_sat): New functions.
* src/tgbaalgos/save.cc, src/tgbaalgos/save.hh,
src/tgbatest/readsave.cc, src/tgbatest/readsave.test: New files.
* src/tgbaalgos/Makefile.am (libtgbaalgos_la_SOURCES): Add
save.cc and save.hh.
* src/tgbatest/Makefile.am (check_PROGRAMS): Add readsave.
(readsave_SOURCES): New variable.
(TESTS): Add readsave.test.

src/tgbaalgos/Makefile.am

@@ -4,4 +4,7 @@ AM_CXXFLAGS = $(WARNING_CXXFLAGS)
 noinst_LTLIBRARIES = libtgbaalgos.la
 libtgbaalgos_la_SOURCES = \
   dotty.cc \
-  dotty.hh
+  dotty.hh \
+  save.cc \
+  save.hh
+

src/tgbaalgos/save.cc

@@ -0,0 +1,52 @@
+#include <set>
+#include "tgba/tgba.hh"
+#include "save.hh"
+#include "tgba/bddprint.hh"
+
+namespace spot
+{
+  typedef std::set<state*, state_ptr_less_than> seen_set;
+
+  /// Process successors.
+  static void
+  save_rec(std::ostream& os, const tgba& g, state* st, seen_set& m)
+  {
+    m.insert(st);
+    std::string cur = g.format_state(st);
+    tgba_succ_iterator* si = g.succ_iter(st);
+    for (si->first(); !si->done(); si->next())
+      {
+	state* s = si->current_state();
+	os << "\"" << cur << "\", \"" << g.format_state(s) << "\", ";
+
+	bdd_print_sat(os, g.get_dict(), si->current_condition()) << ", ";
+	bdd_print_sat(os, g.get_dict(), si->current_promise()) << ";"
+							       << std::endl;
+
+	// Destination already explored?
+	seen_set::iterator i = m.find(s);
+	if (i != m.end())
+	  {
+	    delete s;
+	  }
+	else
+	  {
+	    save_rec(os, g, s, m);
+	    // Do not delete S, it is used as key in M.
+	  }
+      }
+    delete si;
+  }
+
+  std::ostream&
+  tgba_save_reachable(std::ostream& os, const tgba& g)
+  {
+    seen_set m;
+    state* state = g.get_init_state();
+    save_rec(os, g, state, m);
+    // Finally delete all states used as keys in m:
+    for (seen_set::iterator i = m.begin(); i != m.end(); ++i)
+      delete *i;
+    return os;
+  }
+}

src/tgbaalgos/save.hh

@@ -0,0 +1,13 @@
+#ifndef SPOT_TGBAALGOS_SAVE_HH
+# define SPOT_TGBAALGOS_SAVE_HH
+
+#include "tgba/tgba.hh"
+#include <iostream>
+
+namespace spot
+{
+  /// \brief Save reachable states in text format.
+  std::ostream& tgba_save_reachable(std::ostream& os, const tgba& g);
+}
+
+#endif // SPOT_TGBAALGOS_SAVE_HH