173 lines
3.7 KiB
C
173 lines
3.7 KiB
C
/* ************************************************************************** */
|
|
/* */
|
|
/* ::: :::::::: */
|
|
/* edmunds_karp.c :+: :+: :+: */
|
|
/* +:+ +:+ +:+ */
|
|
/* By: tmaze <tmaze@student.42.fr> +#+ +:+ +#+ */
|
|
/* +#+#+#+#+#+ +#+ */
|
|
/* Created: 2019/03/28 16:21:19 by tmaze #+# #+# */
|
|
/* Updated: 2019/04/01 18:36:10 by tmaze ### ########.fr */
|
|
/* */
|
|
/* ************************************************************************** */
|
|
|
|
#include "lem_in.h"
|
|
|
|
int in_use(t_ind **ret, int node)
|
|
{
|
|
t_ind *it;
|
|
int i;
|
|
|
|
i = 0;
|
|
while (ret && ret[i])
|
|
{
|
|
it = ret[i];
|
|
while (it)
|
|
{
|
|
if (it->index == node)
|
|
return (1);
|
|
it = it->next;
|
|
}
|
|
i++;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void reset_node(t_lmdata *data, int node)
|
|
{
|
|
t_ind *it;
|
|
t_ind *it2;
|
|
|
|
it = data->adj[node];
|
|
while (it)
|
|
{
|
|
it->weight = 1;
|
|
it2 = data->adj[it->index];
|
|
while (it2 && it2->index != node)
|
|
it2 = it2->next;
|
|
if (it2)
|
|
it2->weight = 1;
|
|
it = it->next;
|
|
}
|
|
}
|
|
|
|
void mark_node(t_lmdata *data, int node)
|
|
{
|
|
t_ind *it;
|
|
t_ind *it2;
|
|
|
|
it = data->adj[node];
|
|
while (it)
|
|
{
|
|
it->weight = 2;
|
|
it2 = data->adj[it->index];
|
|
while (it2 && it2->index != node)
|
|
it2 = it2->next;
|
|
if (it2)
|
|
it2->weight = 0;
|
|
it = it->next;
|
|
}
|
|
}
|
|
|
|
t_ind **resolve_path(t_lmdata *data, int start_ind, int end_ind, int nb_path)
|
|
{
|
|
t_ind **ret;
|
|
t_ind *it;
|
|
int i;
|
|
int j;
|
|
|
|
ret = NULL;
|
|
i = 0;
|
|
if (nb_path > 0 && (ret = (t_ind**)ft_memalloc(sizeof(t_ind*) * (nb_path + 1)))
|
|
!= NULL)
|
|
{
|
|
ret[nb_path] = NULL;
|
|
while (i < nb_path)
|
|
{
|
|
j = end_ind;
|
|
ft_printf("===== start resolv %d =====\n", i);
|
|
it = data->adj[j];
|
|
while (j != start_ind)
|
|
{
|
|
if (in_use(ret, j))
|
|
{
|
|
lst_inddel(&(ret[i]));
|
|
j = -1;
|
|
break ;
|
|
}
|
|
if (lst_indadd(&(ret[i]), j) == NULL)
|
|
return (NULL); //protect this
|
|
it = data->adj[j];
|
|
ft_printf("===== parents of %d =====\n", j);
|
|
while (it && it->weight != 2)
|
|
{
|
|
ft_printf("index: %d\nweight: %d\n\n", it->index, it->weight);
|
|
it = it->next;
|
|
}
|
|
if (it && it->weight == 2)
|
|
{
|
|
ft_printf("parent selected: %d\n", it->index);
|
|
if (j != end_ind)
|
|
reset_node(data, j);
|
|
}
|
|
j = (j == start_ind) ? -1 : it->index;
|
|
}
|
|
if (j != -1 && lst_indadd(&(ret[i]), j) == NULL)
|
|
return (NULL); //protect this
|
|
i ++;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
t_ind **edmunds_karp(t_lmdata *data, int start_ind, int end_ind)
|
|
{
|
|
t_bfs bfs_tab[data->nb_nodes];
|
|
int i;
|
|
int nb_path;
|
|
t_ind *it;
|
|
|
|
nb_path = 0;
|
|
ft_printf("===== Init bfs =====\n");
|
|
bfs(data, bfs_tab, start_ind, end_ind);
|
|
while (bfs_tab[end_ind].parent != -1)
|
|
{
|
|
nb_path++;
|
|
i = end_ind;
|
|
while (i != -1)
|
|
{
|
|
if (i != end_ind && i != start_ind)
|
|
mark_node(data, i);
|
|
i = bfs_tab[i].parent;
|
|
}
|
|
ft_printf("===== list of adj =====\n");
|
|
i = 0;
|
|
while (i < data->nb_nodes)
|
|
{
|
|
ft_printf("===== adj of %d =====\n", i);
|
|
it = data->adj[i];
|
|
while (it)
|
|
{
|
|
ft_printf("index: %d\nweight: %d\n\n", it->index, it->weight);
|
|
it = it->next;
|
|
}
|
|
i++;
|
|
}
|
|
ft_printf("===== new bfs =====\n");
|
|
bfs(data, bfs_tab, start_ind, end_ind);
|
|
}
|
|
ft_printf("===== list of adj =====\n");
|
|
i = 0;
|
|
while (i < 7)
|
|
{
|
|
ft_printf("===== adj of %d =====\n", i);
|
|
it = data->adj[i];
|
|
while (it)
|
|
{
|
|
ft_printf("index: %d\nweight: %d\n\n", it->index, it->weight);
|
|
it = it->next;
|
|
}
|
|
i++;
|
|
}
|
|
return (resolve_path(data, start_ind, end_ind, nb_path));
|
|
}
|