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# skeleton.hxx

    00001 // skeleton.hxx: 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_ALGORITHMS_INTERNAL_SKELETON_HXX
    00018 # define VCSN_ALGORITHMS_INTERNAL_SKELETON_HXX
    00019
    00020 # include <vaucanson/algorithms/internal/skeleton.hh>
    00021
    00022 namespace vcsn
    00023 {
    00024
    00025   /*------------------------.
    00026   | Skeleton Implementation |
    00027   `------------------------*/
    00028
    00029   template<typename A, typename T>
    00030   Skeleton<A, T>::Skeleton(const Element<A, T>& x) : a(x)
    00031   {
    00032
    00033     typedef Element<A, T> automaton_t;
    00034
    00035     AUTOMATON_TYPES(automaton_t);
    00036
    00037     int i, j;
    00038     std::set<htransition_t> out;
    00039     std::map<series_set_elt_t, int> Lmap;
    00040     std::map<hstate_t, int> Smap;
    00041
    00042     states.reserve(a.states().size());
    00043     transitions.reserve(a.transitions().size());
    00044     src_transitions.reserve(a.transitions().size());
    00045     dst_transitions.reserve(a.transitions().size());
    00046     transitions_labels.reserve(a.transitions().size());
    00047
    00048     // *** FIXME ***
    00049     // HOW TO INITIALIZE A VECTOR OF LISTS?
    00050     std::list<int> dummy;
    00051     delta_in.assign(a.states().size(), dummy);
    00052     delta_out.assign(a.states().size(), dummy);
    00053
    00054
    00055     // Gives each state a number. Constructs lists I and T of initial
    00056     // and final states
    00057     // Time complexity: O(n log n)
    00058     i = 0;
    00059     for_all_states(q, a)
    00060     {
    00061       states.push_back(*q);
    00062       Smap[*q] = i++;
    00063
    00064       if (a.is_initial(*q))
    00065         I.push_front(i - 1);
    00066       else
    00067         if (a.is_final(*q))
    00068           F.push_front(i - 1);
    00069     }
    00070
    00071     // Gives each transition an index (transition[i] = transition whose index is i)
    00072     // Gives each label an index in map Lmap
    00073     // Gives each transition the index of its label (transitions_labels[i] = index
    00074     // of label of transition i)
    00075     // (time complexity: O(m log s + m log n))
    00076     // Constructs vectors src_of and dst_of
    00077
    00078     // Index of the labels
    00079     i = 0;
    00080     // Index of the transitions
    00081     j = 0;
    00082     for_all_transitions(e, a)
    00083     {
    00084       transitions.push_back(*e);
    00085       src_transitions.push_back(Smap[a.src_of(*e)]);
    00086       dst_transitions.push_back(Smap[a.dst_of(*e)]);
    00087
    00088       if (Lmap.find(a.series_of(*e)) == Lmap.end())
    00089         transitions_labels.push_back(Lmap[a.series_of(*e)] = i++);
    00090       else
    00091         transitions_labels.push_back(Lmap[a.series_of(*e)]);
    00092     }
    00093
    00094     // Here, i = number of different labels
    00095
    00096     /*** FIXME ***/
    00097     // The following piece of code is intended to visit each entry of
    00098     // map Lmap and put each label in its place in vector
    00099     // labels, but it doesn't compile. The problem is then solved by
    00100     // visiting all the transitions of the automaton, what can produce
    00101     // several visits to the same label.
    00102     //
    00103     //    for (std::map<label_t, int>::iterator itr = Lmap.begin();
    00104     //         itr != Lmap.end(); itr++)
    00105     //      labels[itr->second] = itr->first;
    00106     // *** REMARK: vector labels is obsolete
    00107
    00108
    00109     // Construct the list of transitions for each label (transitions_lex indexed
    00110     // by labels, transitions_lex[i] = list of transitions with label i)
    00111
    00112     std::vector< std::list<int> > transitions_lex(i);
    00113
    00114     for (i = 0; i < static_cast<int>(a.transitions().size()); i++)
    00115       transitions_lex[transitions_labels[i]].push_front(i);
    00116
    00117     // By using vector transitions_lex, defines ingoing and outgoing transitions
    00118     // of each state in lexicographic order
    00119     for (i = 0; i < static_cast<int>(transitions_lex.capacity()); i++)
    00120       for (std::list<int>::iterator it = transitions_lex[i].begin();
    00121            it != transitions_lex[i].end(); it++)
    00122       {
    00123         delta_in[dst_transitions[*it]].push_back(*it);
    00124         delta_out[src_transitions[*it]].push_back(*it);
    00125       }
    00126
    00127   }
    00128
    00129   template<typename A, typename T>
    00130   void Skeleton<A, T>::reserve_aux_states_int()
    00131   {
    00132     aux_states_int.reserve(a.states().size());
    00133   }
    00134
    00135   template<typename A, typename T>
    00136   void Skeleton<A, T>::reserve_aux_states_bool()
    00137   {
    00138     aux_states_bool.reserve(a.states().size());
    00139   }
    00140
    00141   template<typename A, typename T>
    00142   void Skeleton<A, T>::reserve_aux_states_generic()
    00143   {
    00144     aux_states_generic.reserve(a.states().size());
    00145   }
    00146
    00147   template<typename A, typename T>
    00148   void Skeleton<A, T>::reserve_aux_transitions_int()
    00149   {
    00150     aux_transitions_int.reserve(a.transitions().size());
    00151   }
    00152
    00153   template<typename A, typename T>
    00154   void Skeleton<A, T>::reserve_aux_transitions_bool()
    00155   {
    00156     aux_transitions_bool.reserve(a.transitions().size());
    00157   }
    00158
    00159   template<typename A, typename T>
    00160   void Skeleton<A, T>::reserve_aux_transitions_generic()
    00161   {
    00162     aux_transitions_generic.reserve(a.transitions().size());
    00163   }
    00164
    00165 } // vcsn
    00166
    00167 #endif // ! VCSN_ALGORITHMS_INTERNAL_SKELETON_HXX