Intersection of line and face when parallel

Hi there,

acting in a 2D environment I need to check if a given edge passes through a face.
I also need to differentiate these cases:

a) the edge crosses the face -> this means a hit
b) the edge is only touching the face's boundary (e.g. it is contained in the boundary wire) -> this means not hit

I am working with IntCurvesFace_ShapeIntersector but it gives no intersections. I also tried setting the boundary parameter to +/-INF (see https://www.opencascade.com/content/line-face-intersection).
Could it be a problem that the face and the edge are parallel in my 2d world?

Thanks for your help, Elio