Function Serializer_Graph_SetNodeLabels

src/serializers/graph_extensions.c:96–128

computes NodeLabelMarix out of label matrices NodeLabelMatrix[:i] = diag(LabelMatrix[i]) must be called once after all virtual keys loaded for perf

// NodeLabelMatrix[:i] = diag(LabelMatrix[i])
// must be called once after all virtual keys loaded for perf
void Serializer_Graph_SetNodeLabels
(
	Graph *g
) {
	ASSERT(g);

	GrB_Vector v;
	int node_count           = Graph_RequiredMatrixDim(g);
	int label_count          = Graph_LabelTypeCount(g);
	RG_Matrix node_labels    = Graph_GetNodeLabelMatrix(g);
	GrB_Matrix node_labels_m = RG_MATRIX_M(node_labels);

#if RG_DEBUG
	GrB_Index nvals;
	RG_Matrix_nvals(&nvals, node_labels);
	ASSERT(nvals == 0);
#endif

	GrB_Vector_new(&v, GrB_BOOL, node_count);

	for(int i = 0; i < label_count; i++) {
		RG_Matrix  M  =  Graph_GetLabelMatrix(g, i);
		GrB_Matrix m  =  RG_MATRIX_M(M);

		GxB_Vector_diag(v, m, 0, NULL);

		GxB_Row_subassign(node_labels_m, NULL, NULL, v, i, GrB_ALL, 0, NULL);
	}

	GrB_transpose(node_labels_m, NULL, NULL, node_labels_m, NULL);

	GrB_Vector_free(&v);
}

// optimized version of Graph_FormConnection
// used only when matrix doesn't contains multi edge values