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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: encapsulating directory operations
Date: Tue, 10 Jun 2025 03:21:52 -0700
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Kaz Kylheku <643-408-1753@kylheku.com> writes:

> On 2025-06-08, Scott Lurndal <scott@slp53.sl.home> wrote:
>
>> Muttley@DastardlyHQ.org writes:
>>
>>> On Sun, 8 Jun 2025 17:02:08 +0200
>>> Bonita Montero <Bonita.Montero@gmail.com> wibbled:
>>>
>>>> Am 08.06.2025 um 10:55 schrieb Muttley@DastardlyHQ.org:
>>>>
>>>>> You can of course use setjmp & longjmp in C but depending on how
>>>>> many levels up you jump they could be more trouble than they're
>>>>> worth.  I think I've only ever used them once.
>>>>
>>>> That's makes a lot of work and it's really ugly.  And you need
>>>> global jump_buf-s for that.

Nonsense.

[...]

> setjmp and longjmp have a clearly defined implementation model
> (obviously not in ISO C, but so in implementation practice).

What I think you mean is that setjmp/longjmp have a natural and
straightforward implementation strategy that works on many
hardware platforms and in many C implementations.  That strategy
is not ubiquitous, and TTBOMK is not defined anywhere except
implicitly by the code that implements it.  Described perhaps,
but that isn't the same as a definition.