FD_LIB

fd_lib = {
    FD_CLR = function (fd, set)
        for i = 0, set.fd_count do
            if set.fd_array[i] == fd then
                while i < set.fd_count-1
                    set.fd_array[i] = set.fd_array[i + 1]
                    i = i + 1
                end
                set.fd_count = set.fd_count - 1
                break
            end
        end
    end,
    FD_SET = function (fd, set)
        local Index
        for i = 0, set.fd_count do
            if set.fd_array[i] == fd then
                Index = i
                break
            end
        end

        if Index = set.fd_count then
            if set.fd_count < 64 then
                set.fd_array[i] = fd
                set.fd_count = set.fd_count + 1
            end
        end
    end,
    FD_ZERO = function (set)
        set.fd_count = 0
    end,
    FD_ISSET = sock.__WSAFDIsSet,
}