Function tskit::bindings::tsk_tree_get_depth

pub unsafe extern "C" fn tsk_tree_get_depth(
    self_: *const tsk_tree_t,
    u: tsk_id_t,
    ret_depth: *mut c_int
) -> c_int

@brief Return number of nodes on the path from the specified node to root.

@rst Return the number of nodes on the path from u to root, not including u. The depth of a root is therefore zero.

As a special case, the depth of the :ref:virtual root <sec_data_model_tree_roots> is defined as -1. @endrst

@param self A pointer to a tsk_tree_t object. @param u The tree node. @param ret_depth An int pointer to store the returned node depth. @return 0 on success or a negative value on failure.