3.8. igraph_get_subisomorphisms_vf2 — Return all subgraph isomorphic mappings

int igraph_get_subisomorphisms_vf2(const igraph_t *graph1,
				   const igraph_t *graph2,
				   igraph_vector_ptr_t *maps);

This function collects all isomorphic mappings of graph2 to a subgraph of graph1. It uses the igraph_subisomorphic_function_vf2() function.

Arguments:

`graph1`:	The first input graph, may be directed or undirected. This is supposed to be the larger graph.
`graph2`:	The second input graph, it must have the same directedness as `graph1`. This is supposed to be the smaller graph.
`maps`:	Pointer vector. On return it contains pointers to igraph_vector_t objects, each vector is an isomorphic mapping of `graph2` to a subgraph of `graph1`. Please note that you need to 1) Destroy the vectors via `igraph_vector_destroy()`, 2) free them via `free()` and then 3) call `igraph_vector_ptr_destroy()` on the pointer vector to deallocate all memory when `maps` is no longer needed.

Returns:

Error code.

Time complexity: exponential.