"Kenneth Brody" <kenbrody@spamcop.net> a écrit dans le message de news:
470BBAEF.94FC0D04@spamcop.net...
> user923005 wrote:
> [...]
>> 20.9: How can I determine whether a machine's byte order is big-
>> endian
>> or little-endian?
>>
>> A: One way is to use a pointer:
>>
>> int x = 1;
>> if(*(char *)&x == 1)
>> printf("little-endian\n");
>> else printf("big-endian\n");
>>
>> It's also possible to use a union.
>>
>> See also question 10.16.
>>
>> References: H&S Sec. 6.1.2 pp. 163-4.
>
> I supposed that, techincally, the answer is incomplete at best.
> What happens on sizeof(char)==sizeof(int) systems? (And, on such
> systems, is "endianness" even relevent?)
>
> Then there are systems with some horrible mixed-endianned storage,
> where the 32-bit value 0x11223344 would be stored: 22 11 44 33.
> (Or is it 33 44 11 22?)

None still in production. You are refering to some PDP systems from more
than 30 years ago.

--
Chqrlie.

"Charlie Gordon" <news@chqrlie.org> writes:
> "Kenneth Brody" <kenbrody@spamcop.net> a écrit dans le message de news:
> 470BBAEF.94FC0D04@spamcop.net...
[...]
>> Then there are systems with some horrible mixed-endianned storage,
>> where the 32-bit value 0x11223344 would be stored: 22 11 44 33.
>> (Or is it 33 44 11 22?)
>
> None still in production. You are refering to some PDP systems from more
> than 30 years ago.

I'll bet there are still a few PDP-11s in production use.

--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

"Keith Thompson" <kst-u@mib.org> a écrit dans le message de news:
ln7ilh1sl0.fsf@nuthaus.mib.org...
> "Charlie Gordon" <news@chqrlie.org> writes:
>> "Kenneth Brody" <kenbrody@spamcop.net> a écrit dans le message de news:
>> 470BBAEF.94FC0D04@spamcop.net...
> [...]
>>> Then there are systems with some horrible mixed-endianned storage,
>>> where the 32-bit value 0x11223344 would be stored: 22 11 44 33.
>>> (Or is it 33 44 11 22?)
>>
>> None still in production. You are refering to some PDP systems from more
>> than 30 years ago.
>
> I'll bet there are still a few PDP-11s in production use.

Sorry, I meant none still being produced (manufactured) today.
PDP-11s in working order are worth some money for museums and collectors ;-)

--
Chqrlie.