Function split_qname3 

pub unsafe fn split_qname3(name: *const xmlChar, len: *mut c_int) -> c_int

Split a QName returning the prefix length (upstream tree.c xmlSplitQName3): returns the length of the prefix (before ‘:’), or 0 when there is no prefix. name must not start with ‘:’.

Safety

• name must be a valid null-terminated string or NULL.