[igraph] Selecting edges in C

[Matthew Walker]

Hi,

I am a bit stumped.  I would like to select all edges that go from a set 
of vertices to given a vertex.  In R, I can do it with:

edges <- E(graph)[ vertices_in_set %->% given_vertex]

Can you tell me what functions I can use to do the same in C?  I found 
igraph_es_fromto(), but it has not yet been implemented.  I have tried 
to understand the R code in iterators.R but I haven't been very successful.

Can someone show me what I'm missing?

Thanks in advance!

Matthew