hoa: preliminary implementation of a parser

* src/hoaparse/Makefile.am, src/hoaparse/fmterror.cc,
src/hoaparse/hoaparse.yy, src/hoaparse/hoascan.ll,
src/hoaparse/parsedecl.hh, src/hoaparse/public.hh: New files.
* src/Makefile.am, configure.ac, README: Adjust.
* src/tgbatest/ltl2tgba.cc: Add a -XH option.
* src/tgbatest/hoaparse.test: New file.
* src/tgbatest/Makefile.am: Adjust.
* buddy/src/bddx.h: Add a bdd_from_int() function.

src/hoaparse/Makefile.am

@@ -0,0 +1,57 @@
+## -*- coding: utf-8 -*-
+## Copyright (C) 2013, 2014 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/>.
+
+AM_CPPFLAGS = -I$(srcdir)/.. -I.. $(BUDDY_CPPFLAGS) -DYY_NO_INPUT
+# Disable -Werror because too many versions of flex yield warnings.
+AM_CXXFLAGS = $(WARNING_CXXFLAGS:-Werror=)
+
+hoaparsedir = $(pkgincludedir)/hoaparse
+
+hoaparse_HEADERS = public.hh
+
+noinst_LTLIBRARIES = libhoaparse.la
+
+HOAPARSE_YY = hoaparse.yy
+FROM_HOAPARSE_YY_MAIN = hoaparse.cc
+FROM_HOAPARSE_YY_OTHERS = \
+  stack.hh \
+  hoaparse.hh
+
+FROM_HOAPARSE_YY = $(FROM_HOAPARSE_YY_MAIN) $(FROM_HOAPARSE_YY_OTHERS)
+
+BUILT_SOURCES = $(FROM_HOAPARSE_YY)
+MAINTAINERCLEANFILES = $(FROM_HOAPARSE_YY)
+
+$(FROM_HOAPARSE_YY_MAIN): $(srcdir)/$(HOAPARSE_YY)
+## We must cd into $(srcdir) first because if we tell bison to read
+## $(srcdir)/$(HOAPARSE_YY), it will also use the value of $(srcdir)/
+## in the generated include statements.
+	cd $(srcdir) && \
+	  $(BISON) -Wall -Werror --report=all $(BISON_EXTRA_FLAGS) \
+	  $(HOAPARSE_YY) -o $(FROM_HOAPARSE_YY_MAIN)
+$(FROM_HOAPARSE_YY_OTHERS): $(HOAPARSE_YY)
+	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) $(FROM_HOAPARSE_YY_MAIN)
+
+EXTRA_DIST = $(HOAPARSE_YY)
+
+libhoaparse_la_SOURCES = \
+  fmterror.cc \
+  $(FROM_HOAPARSE_YY) \
+  hoascan.ll \
+  parsedecl.hh