automaton_tools.hh

00001 // automaton_tools.hh: this file is part of the Vaucanson project.
00002 //
00003 // Vaucanson, a generic library for finite state machines.
00004 //
00005 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 The Vaucanson Group.
00006 //
00007 // This program is free software; you can redistribute it and/or
00008 // modify it under the terms of the GNU General Public License
00009 // as published by the Free Software Foundation; either version 2
00010 // of the License, or (at your option) any later version.
00011 //
00012 // The complete GNU General Public Licence Notice can be found as the
00013 // `COPYING' file in the root directory.
00014 //
00015 // The Vaucanson Group consists of people listed in the `AUTHORS' file.
00016 //
00017 #ifndef VCSN_TOOLS_AUTOMATON_TOOLS_HH
00018 # define VCSN_TOOLS_AUTOMATON_TOOLS_HH
00019 
00020 # include <algorithm>
00021 # include <deque>
00022 # include <vaucanson/automata/concept/automata.hh>
00023 # include <vaucanson/misc/random.hh>
00024 
00025 namespace vcsn {
00026   namespace tools {
00027 
00028     template <class Auto>
00029       std::deque<hstate_t>
00030       choose_n_states(const Auto& a, unsigned n)
00031       {
00032         std::deque<hstate_t> s;
00033         std::insert_iterator<std::deque<hstate_t> > i(s, s.begin());
00034         misc::random::sample_n(a.states().begin(),
00035             a.states().end(),
00036             i,
00037             n);
00038         return s;
00039       }
00040 
00041   } // tools
00042 } // vcsn
00043 
00044 #endif // ! VCSN_TOOLS_AUTOMATON_TOOLS_HH

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