Add a parser for automata in LBTT's format.

* src/tgbaalgos/lbtt.hh, src/tgbaalgos/lbtt.cc (lbtt_parse):
New function.
* src/tgba/tgbaexplicit.hh (get_acceptance_condition): Make it public.
* src/tgbatest/ltl2tgba.cc: Add a -XL option to read LBTT file.
* src/tgbatest/lbttparse.test: New file.
* src/tgbatest/Makefile.am: Add it.

src/tgbatest/lbttparse.test

@@ -0,0 +1,41 @@
+#!/bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2012 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/>.
+
+. ./defs
+
+set -e
+
+for f in 'p0 U p1 U p2' 'Gp00 | Gp13 | Gp42' '{(1;1)*}[]->p1'
+do
+  # Make sure Spot can read the LBTT it produces
+  run 0 ../ltl2tgba -t "$f" > out
+  s=`wc -l < out`
+  run 0 ../ltl2tgba -t -XL out > out2
+  s2=`wc -l < out2`
+  test "$s" -eq "$s2"
+
+  # The LBTT output use 2 lines par state, one line per transition,
+  # and one extra line for header.
+  run 0 ../ltl2tgba -ks "$f" > size
+  st=`cat size | sed -n 's/states: //p'`
+  tr=`cat size | sed -n 's/transitions: //p'`
+  l=`expr $st \* 2 + $tr + 1`
+  test "$s" -eq "$l"
+done