Implement a new compression inspired from simple-9.

* src/misc/intvcmp2.cc, src/misc/intvcmp2.hh: New files.
* src/misc/Makefile.am: Add them.
* src/tgbatest/intvcmp2.cc: New test.
* src/tgbatest/Makefile.am: Add it.
* src/tgbatest/intvcomp.test: Call it.

src/misc/intvcmp2.hh

@@ -0,0 +1,52 @@
+// Copyright (C) 2011 Laboratoire de Recherche et Developpement 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 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.
+
+#ifndef SPOT_MISC_INTVCMP2_HH
+# define SPOT_MISC_INTVCMP2_HH
+
+#include <vector>
+
+namespace spot
+{
+  /// \addtogroup misc_tools
+  /// @{
+
+  /// \brief Compress an int array of size \a n into a int array.
+  ///
+  /// The destination array should be at least \a dest_size large An
+  /// assert will be triggered if \a dest_size is too small.  On
+  /// return, \a dest_size will be set to the actually number of int
+  /// filled in \a dest
+  void
+  int_array_array_compress2(const int* array, size_t n,
+			   int* dest, size_t& dest_size);
+
+  /// \brief Uncompress an int array of size \a array_size into a int
+  ///        array of size \a size.
+  ///
+  /// \a size must be the exact expected size of uncompressed array.
+  void
+  int_array_array_decompress2(const int* array, size_t array_size,
+			     int* res, size_t size);
+
+  /// @}
+}
+
+#endif // SPOT_MISC_INTVCMP2_HH