int main()
{
srandom(time(0));
graph_t a;
vector_int v1;
vector_int_init_value_end(&v1, -1, 1,5, 2,5, 1,2, 2,1, 0,3, 0,2, 3,4, 3,6, 4,6, 6,4, -1,7, -1);
new_graph(&a, &v1, 0, GRAPH_DIRECTED);
print_graph_vectors(&a, stdout);
printf("ec=%d\t",graph_edges_count(&a));
printf("vc=%d\n",graph_vertices_count(&a));
int vc = graph_vertices_count(&a);
vector_int mem;
vector_int_init(&mem, vc);
vector_int_fill(&mem, -1);
vector_int cs;
vector_int_init(&cs, 0);
int cc;
graph_clusters_strong(&a,&mem,&cs,&cc);
printf("mem:");
print_vector_int(&mem, stdout);
printf("<<<combine vertices\n");
graph_t b;
graph_combine_vertices(&a, &mem, &b);
print_graph_vectors(&b, stdout);
printf("ec=%d\t",graph_edges_count(&b));
printf("vc=%d\n",graph_vertices_count(&b));
double re;
printf(">>>>randomly attack\n");
re = graph_fault_propagation(&b, 0.3, 0.2, GRAPH_ATK_RANDOM);
printf("random re=%f\n",re);
printf(">>>>outgoing based attack\n");
re = graph_fault_propagation(&b, 0.3, 0.2, GRAPH_ATK_OUTGOING);
printf("outgoing re=%f\n",re);
printf(">>>>incoming based attack\n");
re = graph_fault_propagation(&b, 0.3, 0.2, GRAPH_ATK_INCOMING);
printf("incoming re=%f\n",re);
vector_int inf;
vector_int_init(&inf, 0);
int cascading_nodes_count = graph_cascading_nodes_count(&b, &inf, 0.3, 0.2, GRAPH_ATK_RANDOM);
assert(cascading_nodes_count == vector_int_sum(&inf));
vector_int_destroy(&inf);
vector_int_destroy(&mem);
vector_int_destroy(&cs);
vector_int_destroy(&v1);
graph_destroy(&b);
graph_destroy(&a);
return 0;
}
/*
* graph_combine_vertices
*/
int graph_combine_vertices(const graph_t *graph, const vector_int *membership, graph_t *res)
{
int ec = graph_edges_count(graph);
vector_int new_edges;
vector_int_init(&new_edges, 2 * ec);
int from, to, nef, net;
int eid = 0;
for (int i = 0; i < ec; i++) {
graph_edge(graph, i, &from, &to);
nef = VECTOR(*membership)[from];
net = VECTOR(*membership)[to];
if (nef == net || nef < 0 || net < 0) continue;
VECTOR(new_edges)[2*eid+0] = nef;
VECTOR(new_edges)[2*eid+1] = net;
eid++;
}
eid--;
vector_int_resize(&new_edges, 2 * eid);
new_graph(res, &new_edges, 0, graph->directed);
graph_remove_multi_edges(res);
return 0;
}
/*
* graph_remove_multi_edges
*/
void graph_remove_multi_edges(graph_t *graph)
{
int ec = graph_edges_count(graph);
int vc = graph_vertices_count(graph);
/* mark the edges needed to be removed */
int *mark = Calloc(ec, int);
assert(0 != mark);
int to,_to,e;
vector_int eids;
vector_int_init(&eids, 0);
for (int i = 0; i < vc; i++) {
_graph_edges_to(graph, &eids, i);
for (int j = 1; j < vector_int_size(&eids); j++) {
_to = GRAPH_TO(graph, VECTOR(eids)[j-1]);
to = GRAPH_TO(graph, VECTOR(eids)[j]);
e = VECTOR(eids)[j];
if (_to == to)
mark[e] = 1;
}
}
vector_int_clear(&eids);
for (int i = 0; i < ec; i++) {
if (mark[i] != 0)
vector_int_push_back(&eids, i);
}
graph_del_edges(graph, graph_ess_vector(&eids));
vector_int_destroy(&eids);
Free(mark);
}
/*
* graph_has_multiple
*/
int graph_has_multiple(const graph_t *graph)
{
int vc = graph_vertices_count(graph);
int ec = graph_edges_count(graph);
int dflag = graph_is_directed(graph);
if (vc == 0 || ec == 0)
return 0;
vector_int neis;
vector_int_init(&neis, 0);
int found = 0, n;
for (int i = 0; i < vc && !found; i++) {
graph_neighbors(graph, &neis, i, GRAPH_OUT);
n = vector_int_size(&neis);
for (int j = 1; j < n; j++) {
if (VECTOR(neis)[j-1] == VECTOR(neis)[j]) {
if (dflag)
/* Directed, so this is a real multiple edge */
return 1;
else if (VECTOR(neis)[j-1] != i)
/* Undirected, but not a loop edge */
return 1;
else if (j < n-1 && VECTOR(neis)[j] == VECTOR(neis)[j+1])
/* Undirected, loop edge, multiple times */
return 1;
}
}
}
return 0;
}
unsigned int graph_connected_components(graph_t g) {
unsigned int classes_count = 0, n, m, left, right;
union_find_t uf;
edge_t *edges;
n = graph_vertices_count(g);
m = graph_edges_count(g);
uf = union_find_create(n);
edges = graph_edges(g);
for (unsigned int i = 0; i < m; i++) {
left = vertex_label(edge_left_vertex(edges[i]));
right = vertex_label(edge_right_vertex(edges[i]));
left = union_find_find(uf, left);
right = union_find_find(uf, right);
if (!union_find_connected(uf, left, right)) {
union_find_union(uf, left, right);
}
edges[i] = edge_destroy(edges[i]);
}
free(edges);
classes_count = union_find_count(uf);
uf = union_find_destroy(uf);
return (classes_count);
}
/*
* graph_del_edges - delete the edges
*/
int graph_del_edges(graph_t *graph, graph_es_t eids)
{
int ec = graph_edges_count(graph);
int vc = graph_vertices_count(graph);
/* mark the edges needed to be removed */
int *mark = Calloc(ec, int);
assert(0 != mark);
graph_eit_t eit;
graph_eit_create(graph, eids, &eit);
int edges_to_remove = 0;
for (GRAPH_EIT_RESET(eit); !GRAPH_EIT_END(eit); GRAPH_EIT_NEXT(eit)) {
int e = GRAPH_EIT_GET(eit);
if (0 == mark[e]) {
edges_to_remove++;
mark[e]++;
}
}
int remaining_edges = ec - edges_to_remove;
/* We don't need the iterator any more */
graph_eit_destroy(&eit);
/* We build some new vectors to store the remaining edges */
vector_int newfrom, newto, newoi, newii;
vector_int_init(&newfrom, remaining_edges);
vector_int_init(&newto, remaining_edges);
vector_int_init(&newoi, remaining_edges);
vector_int_init(&newii, remaining_edges);
/* Actually remove the edges, move from pos i to pos j in newfrom/newto */
for (int i = 0, j = 0; j < remaining_edges; i++) {
if (0 == mark[i]) {
VECTOR(newfrom)[j] = VECTOR(graph->from)[i];
VECTOR(newto)[j] = VECTOR(graph->to)[i];
j++;
}
}
vector_int_order_inc2(&newfrom, &newto, &newoi, graph->n);
vector_int_order_inc2(&newto, &newfrom, &newii, graph->n);
/* attributes */
/* os & is */
vector_int_scan_tie(&(graph->os), &newfrom, &newoi, graph->n);
vector_int_scan_tie(&(graph->is), &newto, &newii, graph->n);
/* Ok, we've all memory needed, free the old structure */
vector_int_destroy(&graph->from);
vector_int_destroy(&graph->to);
vector_int_destroy(&graph->oi);
vector_int_destroy(&graph->ii);
graph->from = newfrom;
graph->to = newto;
graph->oi = newoi;
graph->ii = newii;
Free(mark);
return 0;
}
unsigned int mst_total_weight(graph_t mst) {
unsigned int result = 0, num_edges;
edge_t *edges;
num_edges = graph_edges_count(mst);
edges = graph_edges(mst);
for (unsigned int i = 0; i < num_edges; i++) {
if (edge_is_primary(edges[i])) {
result += edge_weight(edges[i]);
}
edges[i] = edge_destroy(edges[i]);
}
free(edges);
return result;
}
/*
* graph_add_vertices
*
* @graph: target
* @nv: number of vertices
* @attr: the attributes of the new vertices
*/
int graph_add_vertices(graph_t *graph, int nv, void *attr)
{
assert(0 <= nv);
vector_int_resize(&(graph->os), graph->n + nv + 1);
vector_int_resize(&(graph->is), graph->n + nv + 1);
int ec = graph_edges_count(graph);
for (int i = graph->n + 1; i < graph->n + nv + 1; i++) {
VECTOR(graph->os)[i] = ec;
VECTOR(graph->is)[i] = ec;
}
graph->n += nv;
/* attribute -mark-gyc-*/
return 0;
}
/*
* graph_add_edges
*/
int graph_add_edges(graph_t *graph, vector_int *edges, void *attr)
{
assert(0 == vector_int_size(edges) % 2);
assert(1 == vector_int_isininterval(edges, 0, graph_vertices_count(graph)-1));
int ec = graph_edges_count(graph);
int ec_to_add = vector_int_size(edges) / 2;
/* from & to */
vector_int_reserve(&(graph->from), ec + ec_to_add);
vector_int_reserve(&(graph->to), ec + ec_to_add);
int i = 0;
int directed = graph->directed;
while (i < ec_to_add * 2) {
if (directed || VECTOR(*edges)[i] > VECTOR(*edges)[i+1]) {
vector_int_push_back(&(graph->from), VECTOR(*edges)[i++]);
vector_int_push_back(&(graph->to), VECTOR(*edges)[i++]);
} else {
vector_int_push_back(&(graph->to), VECTOR(*edges)[i++]);
vector_int_push_back(&(graph->from), VECTOR(*edges)[i++]);
}
}
/* oi & ii */
vector_int newoi, newii;
vector_int_init(&newoi, ec + ec_to_add);
vector_int_init(&newii, ec + ec_to_add);
vector_int_order_inc2(&(graph->from), &(graph->to), &newoi, graph->n);
vector_int_order_inc2(&(graph->to), &(graph->from), &newii, graph->n);
/* attributes */
/* os & is */
vector_int_scan_tie(&(graph->os), &(graph->from), &newoi, graph->n);
vector_int_scan_tie(&(graph->is), &(graph->to), &newii, graph->n);
/* everything went fine */
vector_int_destroy(&(graph->oi));
vector_int_destroy(&(graph->ii));
graph->oi = newoi;
graph->ii = newii;
return 0;
}
graph_t kruskal(graph_t graph) {
graph_t result = graph_empty(graph_vertices_count(graph));
unsigned int L, R, num_edges = graph_edges_count(graph);
vertex_t l = NULL, r = NULL;
pqueue_t Q = pqueue_empty(num_edges);
union_find_t C = union_find_create(graph_vertices_count(graph));
edge_t E = NULL, *edges = graph_edges(graph);
for (unsigned int i = 0; i < num_edges; i++) {
pqueue_enqueue(Q, edges[i]);
}
free(edges);
edges = NULL;
while (!pqueue_is_empty(Q) && union_find_count(C) > 1) {
E = edge_copy(pqueue_fst(Q));
l = edge_left_vertex(E);
r = edge_right_vertex(E);
L = union_find_find(C, vertex_label(l));
R = union_find_find(C, vertex_label(r));
if (L != R) {
union_find_union(C, L, R);
E = edge_set_primary(E, true);
} else {
E = edge_set_primary(E, false);
}
result = graph_add_edge(result, E);
pqueue_dequeue(Q);
}
while (!pqueue_is_empty(Q)) {
E = edge_copy(pqueue_fst(Q));
pqueue_dequeue(Q);
E = edge_set_primary(E, false);
result = graph_add_edge(result, E);
}
Q = pqueue_destroy(Q);
C = union_find_destroy(C);
return result;
}
unsigned int mst_total_weight(graph_t mst) {
/* Returns the sum of the weights of all the primary
* edges of the given graph.
*/
unsigned int sum, m;
edge_t *edges;
edges = graph_edges(mst);
sum = 0;
m = graph_edges_count(mst);
for (unsigned int i = 0; i < m; i++) {
if (edge_is_primary(edges[i])) {
sum += edge_weight(edges[i]);
}
edges[i] = edge_destroy(edges[i]);
}
free(edges);
return (sum);
}
int graph_subgraph(const graph_t *graph, graph_t *subgraph, graph_vs_t vids)
{
int vc = graph_vertices_count(graph);
int ec = graph_edges_count(graph);
vector_int vss;
vector_int_init(&vss, vc);
vector_int_fill(&vss, -1);
int i,j,u,v;
graph_vit_t vit;
graph_vit_create(graph, vids, &vit);
int nvc = GRAPH_VIT_SIZE(vit);
for (GRAPH_VIT_RESET(vit), i=0; !GRAPH_VIT_END(vit); GRAPH_VIT_NEXT(vit), i++) {
int vid = GRAPH_VIT_GET(vit);
VECTOR(vss)[vid] = i;
}
graph_vit_destroy(&vit);
int nec = 0;
vector_int new_edges;
vector_int_init(&new_edges, 2 * ec);
for (int eid = 0; eid < ec; eid++) {
graph_edge(graph, eid, &i, &j);
u = VECTOR(vss)[i];
v = VECTOR(vss)[j];
if (-1 == u || -1 == v)
continue;
VECTOR(new_edges)[2*nec+0] = u;
VECTOR(new_edges)[2*nec+1] = v;
nec++;
}
vector_int_resize(&new_edges, 2 * nec);
new_graph(subgraph, &new_edges, nvc, graph_is_directed(graph));
vector_int_destroy(&new_edges);
vector_int_destroy(&vss);
return 0;
}
int main()
{
int vc = 9334;
int ec = 26841;
vector_int edges;
vector_int_init(&edges, ec * 2);
srand((int)time(0));
int src = -1, dst = -1;
for (int i = 0, ei = 0; i < ec; i++,ei+=2) {
src = (int)(rand() % vc);
dst = (int)(rand() % vc);
while (src == dst) {
src = (int)(rand() % vc);
dst = (int)(rand() % vc);
}
VECTOR(edges)[ei] = src;
VECTOR(edges)[ei+1] = dst;
}
graph_t a;
new_graph(&a, &edges, vc, 1);
assert(vc == graph_vertices_count(&a));
assert(ec == graph_edges_count(&a));
printf("reciprocal = %f \n", graph_reciprocal(&a));
int min, max, sum;
double ave;
graph_degree_minmax_avesum(&a, &min, &max, &ave, &sum, GRAPH_OUT, GRAPH_NO_LOOPS);
printf("minout=%d\nmaxout=%d\n\n",min,max);
printf("sum=%d\nave=%f\n\n\n",sum,ave);
graph_degree_minmax_avesum(&a, &min, &max, &ave, &sum, GRAPH_IN, GRAPH_NO_LOOPS);
printf("minin=%d\nmaxin=%d\n\n\n",min,max);
printf("sum=%d\nave=%f\n\n\n",sum,ave);
FILE * f = fopen("a.sif","w");
print_edge(&edges, f);
fclose(f);
//print_graph_ct(&a, GRAPH_OUT, stdout);
}
bool graph_has_cycle(graph_t g) {
bool has_secondary_edge;
edge_t *edges;
unsigned int i, m;
edges = graph_edges(g);
has_secondary_edge = false;
i = 0;
m = graph_edges_count(g);
while (!has_secondary_edge && i < m) {
has_secondary_edge = !edge_is_primary(edges[i]);
edges[i] = edge_destroy(edges[i]);
i += 1;
}
while (i < m) {
edges[i] = edge_destroy(edges[i]);
i += 1;
}
free(edges);
return (has_secondary_edge);
}
graph_t kruskal(graph_t graph) {
/* Computes a MST of the given graph.
*
* This function returns a copy of the input graph in which
* only the edges of the MST are marked as primary. The
* remaining edges are marked as secondary.
*
* The input graph does not change.
*
*/
graph_t mst;
union_find_t uf;
pqueue_t pq;
edge_t *edges;
edge_t e;
unsigned int left, right, n, m;
/* Inicialización */
n = graph_vertices_count(graph);
m = graph_edges_count(graph);
mst = graph_empty(n);
uf = union_find_create(n);
pq = pqueue_empty(m);
/* Llenar `pq` */
edges = graph_edges(graph);
for (unsigned int j = 0; j < m; j++) {
pqueue_enqueue(pq, edges[j]);
}
/* Ahora las aristas están en `pq` */
free(edges);
edges = NULL;
/* Principal */
while (!pqueue_is_empty(pq) && union_find_count(uf) > 1) {
e = edge_copy(pqueue_fst(pq));
left = vertex_label(edge_left_vertex(e));
right = vertex_label(edge_right_vertex(e));
left = union_find_find(uf, left);
right = union_find_find(uf, right);
if (!union_find_connected(uf, left, right)) {
e = edge_set_primary(e, true);
union_find_union(uf, left, right);
} else {
e = edge_set_primary(e, false);
}
mst = graph_add_edge(mst, e);
pqueue_dequeue(pq);
}
/* Agregar aristas restantes como secundarias */
while (!pqueue_is_empty(pq)) {
e = edge_copy(pqueue_fst(pq));
e = edge_set_primary(e, false);
mst = graph_add_edge(mst, e);
pqueue_dequeue(pq);
}
/* Destroy */
uf = union_find_destroy(uf);
pq = pqueue_destroy(pq);
return (mst);
}