72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* bfs.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tmaze <tmaze@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/04/18 09:25:05 by tmaze #+# #+# */
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/* Updated: 2019/04/20 18:04:48 by tmaze ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "lem_in.h"
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void bfs_init(t_lmdata *data, t_bfs *tab)
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{
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int i;
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i = 0;
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while (i < data->nb_nodes)
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{
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tab[i].queue = -1;
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tab[i].visited = 0;
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tab[i].parent = -1;
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i++;
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}
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}
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int is_in_queue(t_lmdata *data, t_bfs *tab, int node)
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{
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int i;
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i = 0;
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while (i < data->nb_nodes && tab[i].queue != node)
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i++;
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return (i < data->nb_nodes && tab[i].queue == node);
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}
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void bfs(t_lmdata *data, t_bfs *tab, int s_ind, int e_ind)
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{
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int i;
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int j;
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int used;
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t_ind *it;
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i = 0;
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bfs_init(data, tab);
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tab[i].queue = s_ind;
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while (i < data->nb_nodes && tab[i].queue != -1 && tab[e_ind].parent == -1)
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{
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tab[tab[i].queue].visited = 1;
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used = (tab[tab[i].queue].old_visited && get_node_path(data->adj[tab[tab[i].queue].parent], tab[i].queue)->weight == 1);
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it = data->adj[tab[i].queue];
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while (it)
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{
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if (it->weight > 0 && !tab[it->index].visited && (!used || (used && it->weight == 2)))
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{
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j = 0;
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while (j < data->nb_nodes && tab[j].queue != -1 && tab[j].queue != it->index)
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j++;
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if (j < data->nb_nodes && tab[j].queue == -1)
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{
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tab[j].queue = it->index;
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tab[it->index].parent = tab[i].queue;
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}
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}
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it = it->next;
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}
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i++;
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}
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}
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