static void bmz8_traverse(bmz8_config_data_t *bmz8, cmph_uint8 * used_edges, cmph_uint32 v, cmph_uint8 * unused_edge_index, cmph_uint8 * visited)
{
graph_iterator_t it = graph_neighbors_it(bmz8->graph, v);
cmph_uint32 neighbor = 0;
while((neighbor = graph_next_neighbor(bmz8->graph, &it)) != GRAPH_NO_NEIGHBOR)
{
if(GETBIT(visited,neighbor)) continue;
//DEBUGP("Visiting neighbor %u\n", neighbor);
*unused_edge_index = next_unused_edge(bmz8, used_edges, *unused_edge_index);
bmz8->g[neighbor] = (cmph_uint8)(*unused_edge_index - bmz8->g[v]);
//if (bmz8->g[neighbor] >= bmz8->m) bmz8->g[neighbor] += bmz8->m;
SETBIT(visited, neighbor);
(*unused_edge_index)++;
bmz8_traverse(bmz8, used_edges, neighbor, unused_edge_index, visited);
}
}
static void chm_traverse(chm_config_data_t *chm, cmph_uint8 *visited, cmph_uint32 v)
{
graph_iterator_t it = graph_neighbors_it(chm->graph, v);
cmph_uint32 neighbor = 0;
SETBIT(visited,v);
DEBUGP("Visiting vertex %u\n", v);
while((neighbor = graph_next_neighbor(chm->graph, &it)) != GRAPH_NO_NEIGHBOR)
{
DEBUGP("Visiting neighbor %u\n", neighbor);
if(GETBIT(visited,neighbor)) continue;
DEBUGP("Visiting neighbor %u\n", neighbor);
DEBUGP("Visiting edge %u->%u with id %u\n", v, neighbor, graph_edge_id(chm->graph, v, neighbor));
chm->g[neighbor] = graph_edge_id(chm->graph, v, neighbor) - chm->g[v];
DEBUGP("g is %u (%u - %u mod %u)\n", chm->g[neighbor], graph_edge_id(chm->graph, v, neighbor), chm->g[v], chm->m);
chm_traverse(chm, visited, neighbor);
}
}
static cmph_uint8 bmz8_traverse_critical_nodes_heuristic(bmz8_config_data_t *bmz8, cmph_uint32 v, cmph_uint8 * biggest_g_value, cmph_uint8 * biggest_edge_value, cmph_uint8 * used_edges, cmph_uint8 * visited)
{
cmph_uint8 next_g;
cmph_uint32 u;
cmph_uint32 lav;
cmph_uint8 collision;
cmph_uint8 * unused_g_values = NULL;
cmph_uint8 unused_g_values_capacity = 0;
cmph_uint8 nunused_g_values = 0;
vqueue_t * q = vqueue_new((cmph_uint32)(graph_ncritical_nodes(bmz8->graph)));
graph_iterator_t it, it1;
DEBUGP("Labelling critical vertices\n");
bmz8->g[v] = (cmph_uint8)(ceil ((double)(*biggest_edge_value)/2) - 1);
SETBIT(visited, v);
next_g = (cmph_uint8)floor((double)(*biggest_edge_value/2));
vqueue_insert(q, v);
while(!vqueue_is_empty(q))
{
v = vqueue_remove(q);
it = graph_neighbors_it(bmz8->graph, v);
while ((u = graph_next_neighbor(bmz8->graph, &it)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, u) && (!GETBIT(visited,u)))
{
cmph_uint8 next_g_index = 0;
collision = 1;
while(collision) // lookahead to resolve collisions
{
if (next_g_index < nunused_g_values)
{
next_g = unused_g_values[next_g_index++];
}
else
{
next_g = (cmph_uint8)(*biggest_g_value + 1);
next_g_index = 255;//UINT_MAX;
}
it1 = graph_neighbors_it(bmz8->graph, u);
collision = 0;
while((lav = graph_next_neighbor(bmz8->graph, &it1)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, lav) && GETBIT(visited,lav))
{
if(next_g + bmz8->g[lav] >= bmz8->m)
{
vqueue_destroy(q);
free(unused_g_values);
return 1; // restart mapping step.
}
if (GETBIT(used_edges, (next_g + bmz8->g[lav])))
{
collision = 1;
break;
}
}
}
if(collision && (next_g > *biggest_g_value)) // saving the current g value stored in next_g.
{
if(nunused_g_values == unused_g_values_capacity)
{
unused_g_values = (cmph_uint8*)realloc(unused_g_values, ((size_t)(unused_g_values_capacity + BUFSIZ))*sizeof(cmph_uint8));
unused_g_values_capacity += (cmph_uint8)BUFSIZ;
}
unused_g_values[nunused_g_values++] = next_g;
}
if (next_g > *biggest_g_value) *biggest_g_value = next_g;
}
next_g_index--;
if (next_g_index < nunused_g_values) unused_g_values[next_g_index] = unused_g_values[--nunused_g_values];
// Marking used edges...
it1 = graph_neighbors_it(bmz8->graph, u);
while((lav = graph_next_neighbor(bmz8->graph, &it1)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, lav) && GETBIT(visited, lav))
{
SETBIT(used_edges,(next_g + bmz8->g[lav]));
if(next_g + bmz8->g[lav] > *biggest_edge_value)
*biggest_edge_value = (cmph_uint8)(next_g + bmz8->g[lav]);
}
}
bmz8->g[u] = next_g; // Labelling vertex u.
SETBIT(visited, u);
vqueue_insert(q, u);
}
}
}
vqueue_destroy(q);
free(unused_g_values);
return 0;
}
static cmph_uint8 bmz8_traverse_critical_nodes(bmz8_config_data_t *bmz8, cmph_uint32 v, cmph_uint8 * biggest_g_value, cmph_uint8 * biggest_edge_value, cmph_uint8 * used_edges, cmph_uint8 * visited)
{
cmph_uint8 next_g;
cmph_uint32 u; /* Auxiliary vertex */
cmph_uint32 lav; /* lookahead vertex */
cmph_uint8 collision;
vqueue_t * q = vqueue_new((cmph_uint32)(graph_ncritical_nodes(bmz8->graph)));
graph_iterator_t it, it1;
DEBUGP("Labelling critical vertices\n");
bmz8->g[v] = (cmph_uint8)(ceil ((double)(*biggest_edge_value)/2) - 1);
SETBIT(visited, v);
next_g = (cmph_uint8)floor((double)(*biggest_edge_value/2)); /* next_g is incremented in the do..while statement*/
vqueue_insert(q, v);
while(!vqueue_is_empty(q))
{
v = vqueue_remove(q);
it = graph_neighbors_it(bmz8->graph, v);
while ((u = graph_next_neighbor(bmz8->graph, &it)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, u) && (!GETBIT(visited,u)))
{
collision = 1;
while(collision) // lookahead to resolve collisions
{
next_g = (cmph_uint8)(*biggest_g_value + 1);
it1 = graph_neighbors_it(bmz8->graph, u);
collision = 0;
while((lav = graph_next_neighbor(bmz8->graph, &it1)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, lav) && GETBIT(visited,lav))
{
if(next_g + bmz8->g[lav] >= bmz8->m)
{
vqueue_destroy(q);
return 1; // restart mapping step.
}
if (GETBIT(used_edges, (next_g + bmz8->g[lav])))
{
collision = 1;
break;
}
}
}
if (next_g > *biggest_g_value) *biggest_g_value = next_g;
}
// Marking used edges...
it1 = graph_neighbors_it(bmz8->graph, u);
while((lav = graph_next_neighbor(bmz8->graph, &it1)) != GRAPH_NO_NEIGHBOR)
{
if (graph_node_is_critical(bmz8->graph, lav) && GETBIT(visited, lav))
{
SETBIT(used_edges,(next_g + bmz8->g[lav]));
if(next_g + bmz8->g[lav] > *biggest_edge_value)
*biggest_edge_value = (cmph_uint8)(next_g + bmz8->g[lav]);
}
}
bmz8->g[u] = next_g; // Labelling vertex u.
SETBIT(visited,u);
vqueue_insert(q, u);
}
}
}
vqueue_destroy(q);
return 0;
}