Fix run-time computation of automata path.

* taf-kit/src/library_commands.hh (get_automata_path): Search for
vcsn- in program_name, do not assume it is at the beginning.  This
was causing trouble when Taf-Kit was run as './vcsn-char-b' for
instance, because it would then remove the first five characters
and look for a directory named '/n-char-b'.

ChangeLog

+2009-09-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
+
+	Fix run-time computation of automata path.
+
+	* taf-kit/src/library_commands.hh (get_automata_path): Search for
+	vcsn- in program_name, do not assume it is at the beginning.  This
+	was causing trouble when Taf-Kit was run as './vcsn-char-b' for
+	instance, because it would then remove the first five characters
+	and look for a directory named '/n-char-b'.
+
 2009-09-04  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
 	Fix configure-time computation of VCSN_DATA_PATH.

taf-kit/src/library_commands.hh

@@ -2,7 +2,7 @@
 //
 // Vaucanson, a generic library for finite state machines.
 //
-// Copyright (C) 2006, 2008 The Vaucanson Group.
+// Copyright (C) 2006, 2008, 2009 The Vaucanson Group.
 //
 // This program is free software; you can redistribute it and/or
 // modify it under the terms of the GNU General Public License
@@ -67,8 +67,10 @@ get_automata_path(const arguments_t& args)
 	base_path = VCSN_DATA_PATH;
 
       // Strip "vcsn-" from the program name.
-      const std::string lib_dir =
-	std::string("/automata/") + (program_name + 5);
+      const char* suffix = strrchr(program_name, '/');
+      suffix = suffix ? suffix + 6 : program_name + 5;
+
+      const std::string lib_dir = std::string("/automata/") + suffix;
 
       std::string path;