Re: Does Ada support endiannes?

[Gautier write-only <gautier_niouzes@hotmail.com>]

On 14 déc, 17:16, Gerd <Gerd...@t-online.de> wrote:
> Are you sure the "/" and mod would work correct?
>
> Assume, that the Value 16#000000FF# shall be converted to
> 16#FF000000#.
>
> Native : Integer := 16#000000FF#;
>
> Remote : Integer;
>
> Remote := 16#01000000# * ()Native mod 16#000000FF#); -- overflow!
>
> PS: The task is to exchange Integer Values between an Motorola 68k and
> an Intel x86.

Then you will use modular types, and with a definite size.
  Native: Unsigned_32;
  Remote: Unsigned_32;
They never overflow.
But typically (as you can see in Zip-Ada [1]) you won't presume
anything about the native endianness.
The "/" and "mod" (or faster: "Shift_Right" and "and") will do the job
automatically for you.
So your code will work on Intel, PowerPC, 68K - whatever - and
communicate with a remote hardware or media with a specific
endianness.

[1] http://unzip-ada.sf.net/za_html/zip-headers__adb.htm#32_12
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