On Sat, 14 Jun 2025 13:57:56 GMT
scott@slp53.sl.home (Scott Lurndal) wrote:

Bonita Montero <Bonita.Montero@gmail.com> writes:

Am 10.06.2025 um 15:01 schrieb Tim Rentsch:

Consider the following program:

#include <stdio.h>
#include <string.h>

typedef unsigned long long ULL;
ULL hello = ((((0ULL +'o' <<8) +'l' <<8) +'l' <<8) +'e' <<8) +
'h';

int
main(){
printf( "length is %zu\n", strlen( (char*)&hello ) );
return 0;
}

On a little endian machine (with CHAR_BIT == 8) this program works,
and TTBOMK conforms to both the letter and the spirit of the C
standard, without any undefined behavior (on that platform). Yet
there are no arrays in sight, and certainly no array objects.

There are not much remaining big-endian architectures today.

Ethernet is big-endian at the byte level and little-endian
at the bit level.

802.3 frames are big-endian, because of Length field.
Several orders of magnitude more popular Ethernet II frames are
endian-neutral.


--- MBSE BBS v1.1.1 (Linux-x86_64)
* Origin: A noiseless patient Spider (3:633/280.2@fidonet)

Am 14.06.2025 um 15:57 schrieb Scott Lurndal:

Bonita Montero <Bonita.Montero@gmail.com> writes:

Am 10.06.2025 um 15:01 schrieb Tim Rentsch:

Consider the following program:

#include <stdio.h>
#include <string.h>

typedef unsigned long long ULL;
ULL hello = ((((0ULL +'o' <<8) +'l' <<8) +'l' <<8) +'e' <<8) + 'h'; >>>
int
main(){
printf( "length is %zu\n", strlen( (char*)&hello ) );
return 0;
}

On a little endian machine (with CHAR_BIT == 8) this program works,
and TTBOMK conforms to both the letter and the spirit of the C
standard, without any undefined behavior (on that platform). Yet
there are no arrays in sight, and certainly no array objects.

There are not much remaining big-endian architectures today.

Ethernet is big-endian at the byte level and little-endian
at the bit level.

However, little-endian is simply the smarter concept.

--- MBSE BBS v1.1.1 (Linux-x86_64)
* Origin: A noiseless patient Spider (3:633/280.2@fidonet)