Re: Sockets, Streams, and Element_Arrays: Much confusion

[Simon Wright <simon@pushface.org>]

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> Well decoding NTP query from Stream_Element_Array takes 2 statements
> (extracting two big-endian 32-bit numbers). You can check the
> implementation here:
>
> http://www.dmitry-kazakov.de/ada/components.htm#17.17
>
> which is under-zero brained (:-)) compared to dealing with definition
> of record layout and bit orders you suggest.

It's obviously OK to use just the fields of interest in the received
packet.

But this strikes me as something I would have questioned at review:

      Data     : Stream_Element_Array (1..NTP_Packet_Size) :=
                    (  1  => 2#1110_0011#, -- LI, Version, Mode
                       2  => 0,            -- Stratum, or type of clock
                       3  => 0,            -- Polling Interval
                       4  => 16#EC#,       -- Peer Clock Precision
                       13 => 49,
                       14 => 16#4E#,
                       15 => 49,
                       16 => 52,
                       others => 0
                    );