// Subtract returns a - b.
//
func (context *Context) Subtract(a Quad, b Quad) (r Quad) {
var result C.Ret_decQuad_t
assert_sane(context)
result = C.mdq_subtract(a.val, b.val, context.set)
context.set = result.set
return Quad{val: result.val}
}
// Sub returns a - b.
//
func (a Quad) Sub(b Quad) Quad {
return Quad(C.mdq_subtract(C.struct_Quad(a), C.struct_Quad(b)))
}