Re: Creating several types from a base type and conversion

[Simon Wright <simon@pushface.org>]

AdaMagica <christ-usch.grein@t-online.de> writes:

> Am Sonntag, 19. Januar 2020 10:37:21 UTC+1 schrieb Simon Wright:
>> representation clauses where endianness is involved are a lot more
>> confusing than shifts and masks.
>
> See https://en.wikibooks.org/wiki/Ada_Programming/Attributes/%27Bit_Order
>
> This is a complete description of how far we can get with endian
> independence in current Ada. Ada 202x won't change anything in this
> respect.

The description is still, I feel, confusing.

That said, I found this incantation (for an SNTP packet, which is
transmitted in network byte order) works a treat on this LE machine. I
don't have a BE machine to check it on (but the original code was used
on both BE and LE machines).

   end record
     with
       Bit_Order => System.High_Order_First,
       Scalar_Storage_Order => System.High_Order_First,
       Size => 48 * 8;