center api?

w,h = term.getSize()
term.clear()
term.setCursorPos(1,1)
function printCenter(line)
        local width = string.len(line)
        if width < w then
                local x,y = term.getCursorPos()
                term.setCursorPos(w/2 - width/2,y)
        end
        print(line)
end