/* -*- mode: C -*-  */
/* 
   IGraph library.
   Copyright (C) 2011  Gabor Csardi <csardi.gabor@gmail.com>
   Rue de l'Industrie 5, 1005 Lausanne, Switzerland
   
   This program 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.
   
   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 
   02110-1301 USA

*/

#include <igraph.h>

int main() {

  igraph_real_t wv[] = { 5,5,9,9, 9,7,9,2, 3,2,2,9, 8,6,3,9, 6,7,5,6 };
  igraph_vector_t weights;
  igraph_t g;
  igraph_vector_t nrgeo;
  igraph_vector_ptr_t paths;
  igraph_vector_t to;
  int i;
  
  igraph_vector_view(&weights, wv, sizeof(wv) / sizeof(igraph_real_t));
  
  igraph_full(&g, 5, /*directed=*/ 1, /*loops=*/ 0);
  
  igraph_vector_init(&nrgeo, 0);  
  igraph_vector_ptr_init(&paths, 0);
  igraph_vector_init_seq(&to, 0, 4);

  igraph_get_all_shortest_paths_dijkstra(&g, &paths, &nrgeo, /*from=*/ 0,
					 /*to=*/ igraph_vss_all(),
					 &weights, IGRAPH_OUT);

  for (i=0; i<igraph_vector_ptr_size(&paths); i++) {
    igraph_vector_t *v=VECTOR(paths)[i];
    igraph_vector_destroy(v);
    igraph_free(v);
  }
  
  igraph_get_all_shortest_paths_dijkstra(&g, &paths, &nrgeo, /*from=*/ 1,
  					 /*to=*/ igraph_vss_vector(&to),
  					 &weights, IGRAPH_OUT);

  igraph_vector_destroy(&nrgeo);
  for (i=0; i<igraph_vector_ptr_size(&paths); i++) {
    igraph_vector_t *v=VECTOR(paths)[i];
    igraph_vector_destroy(v);
    igraph_free(v);
  }
  igraph_vector_ptr_destroy(&paths);
  igraph_vector_destroy(&to);
  igraph_destroy(&g);
  
  return 0;
}