Function Graph_GetNodeLabels

src/graph/graph.c:1051–1087

populate array of node's label IDs, return number of labels on node

// populate array of node's label IDs, return number of labels on node
uint Graph_GetNodeLabels
(
	const Graph *g,   // graph the node belongs to
	const Node *n,    // node to extract labels from
	LabelID *labels,  // array to populate with labels
	uint label_count  // size of labels array
) {
	// validate inputs
	ASSERT(g      != NULL);
	ASSERT(n      != NULL);
	ASSERT(labels != NULL);

	GrB_Info res;
	UNUSED(res);

	// GrB_Col_extract will iterate over the range of the output size
	RG_Matrix M = Graph_GetNodeLabelMatrix(g);

	EntityID id = ENTITY_GET_ID(n);
	RG_MatrixTupleIter iter = {0};
	res = RG_MatrixTupleIter_AttachRange(&iter, M, id, id);
	ASSERT(res == GrB_SUCCESS);

	uint i = 0;

	for(; i < label_count; i++) {
		GrB_Index col;
		res = RG_MatrixTupleIter_next_BOOL(&iter, NULL, &col, NULL);
		labels[i] = col;

		if(res == GxB_EXHAUSTED) break;
	}

	RG_MatrixTupleIter_detach(&iter);

	return i;
}

// removes edges from Graph and updates graph relevant matrices
void Graph_DeleteEdges