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# characteristic.hxx

    00001 // characteristic.hxx: this file is part of the Vaucanson project.
    00002 //
    00003 // Vaucanson, a generic library for finite state machines.
    00004 //
    00005 // Copyright (C) 2011 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
    00018 # include <vaucanson/design_pattern/design_pattern.hh>
    00019 # include <vaucanson/automata/concept/automata.hh>
    00020 # include <map>
    00021
    00022 namespace vcsn
    00023 {
    00024   template<typename lhs_t, typename rhs_t>
    00025   void characteristic(lhs_t& dst, const rhs_t& from)
    00026   {
    00027     std::map<typename rhs_t::hstate_t, typename lhs_t::hstate_t> stmap;
    00028
    00029     for (typename rhs_t::state_iterator i = from.states().begin();
    00030          i != from.states().end(); ++i)
    00031       {
    00032         typename lhs_t::hstate_t s = dst.add_state();
    00033         if (from.is_final(*i))
    00034           dst.set_final(s);
    00035         if (from.is_initial(*i))
    00036           dst.set_initial(s);
    00037         stmap[*i] = s;
    00038       }
    00039
    00040     typedef typename lhs_t::semiring_elt_t semiring_elt_t;
    00041     semiring_elt_t one(dst.series().semiring().wone_);
    00042     for (typename rhs_t::transition_iterator i = from.transitions().begin();
    00043          i != from.transitions().end(); ++i)
    00044       {
    00045         typename rhs_t::series_set_elt_t label(from.series_of(*i));
    00046
    00047         int size = label.supp().size();
    00048         if (size > 0)
    00049           {
    00050             typename rhs_t::series_set_elt_t::support_t::const_iterator m =
    00051               label.supp().begin();
    00052             for (int j = 0; j < size; ++j, ++m)
    00053               {
    00054                 typename lhs_t::series_set_elt_t
    00055                   series(dst.structure().series());
    00056                 typename lhs_t::monoid_elt_t
    00057                   mv(dst.structure().series().monoid());
    00058                 mv = *m;
    00059                 series.assoc(mv, one);
    00060                 dst.add_series_transition(stmap[from.src_of(*i)],
    00061                                           stmap[from.dst_of(*i)], series);
    00062               }
    00063         }
    00064       }
    00065   }
    00066
    00067 } // ! vcsn