Function Graph_LabelNode

src/graph/graph.c:710–742

label node with each label in 'lbls'

// label node with each label in 'lbls'
void Graph_LabelNode
(
	Graph *g,       // graph to operate on
	NodeID id,      // node ID to update
	LabelID *lbls,  // set to labels to associate with node
	uint lbl_count  // number of labels
) {
	// validations
	ASSERT(g != NULL);
	ASSERT(lbls != NULL);
	ASSERT(lbl_count > 0);
	ASSERT(id != INVALID_ENTITY_ID);

	GrB_Info info;
	UNUSED(info);

	RG_Matrix nl = Graph_GetNodeLabelMatrix(g);
	for(uint i = 0; i < lbl_count; i++) {
		LabelID l = lbls[i];
		RG_Matrix L = Graph_GetLabelMatrix(g, l);

		// set matrix at position [id, id]
		info = RG_Matrix_setElement_BOOL(L, id, id);
		ASSERT(info == GrB_SUCCESS);

		// map this label in this node's set of labels
		info = RG_Matrix_setElement_BOOL(nl, id, l);
		ASSERT(info == GrB_SUCCESS);

		// update labels statistics
		GraphStatistics_IncNodeCount(&g->stats, l, 1);
	}
}

// return true if node is labeled as 'l'
bool Graph_IsNodeLabeled