Re: Writing own source disk

From	Ben Bacarisse <ben@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: Writing own source disk
Date	2024-06-03 12:58 +0100
Organization	A noiseless patient Spider
Message-ID	<87bk4ime5r.fsf@bsb.me.uk> (permalink)
References	<v3hmha$3banl$1@dont-email.me> <87sexvm1lr.fsf@bsb.me.uk> <v3iu4n$3i607$1@dont-email.me> <87mso2mky5.fsf@bsb.me.uk> <v3k49t$3rdhi$1@dont-email.me>

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bart <bc@freeuk.com> writes:

> On 03/06/2024 10:31, Ben Bacarisse wrote:
>> bart <bc@freeuk.com> writes:
>> 
>>> On 02/06/2024 23:17, Ben Bacarisse wrote:
>>>> Malcolm McLean <malcolm.arthur.mclean@gmail.com> writes:
>>>>
>>>>> Writing a prgram which writes its own source to standard output is a
>>>>> standard programming problem. It's called a quine.
>>>> A quine must also not process any input.
>>>
>>> No input at compile-time or runtime?
>> The program isn't running at compile time.
>> 
>>> A compiler necessarily has to have the source code of the program as input,
>>> so what are the limitations?
>> The compiler can do what it likes!
>> 
>>> A C program can use #include; does that extend
>>> to directives like #embed, or is that considered cheating?
>> There's nothing wrong with using either, but a C quine that uses #embed
>> relies on knowing the name of the file in which it is stored.
>
> I assume you can use __FILE__ with #embed? (I can do that with my version
> of it).
>
> Then it doesn't need to know the actual name of the file.

I don't know if that is guaranteed by the standard as I've not really
looked at C23, but if is it, that would be a way to write a (rather
boring) quine in C23.

>>  It is a
>> "fixed point of the execution environment", but it's probably the least
>> interesting C quine possible -- much like
>>    1
>> is a quine in languages that evaluate and print an expression.
>
> Not really.

What part are you objecting to?  That the above (a C quine using #embed)
in not a fixed point of the execution environment?  That it's not an
uninteresting quine?  Or that it's not "much like" self-evaluating
expression quines?

You said "not really" in reply to a moderately complex paragraph.

> I've just added this line:
>
>   puts(strinclude(__FILE__));

I think I'm missing your point.  That does input at run-time (if my
guess about strinclude is correct).

-- 
Ben.

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Thread

Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-02 12:54 +0100
  Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-02 23:17 +0100
    Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-03 00:09 +0100
      Re: Writing own source disk Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-02 23:19 +0000
      Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 13:11 +0100
        Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-04 00:41 +0100
          Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-04 14:40 +0100
            Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-04 19:45 +0100
              Re: Writing own source disk scott@slp53.sl.home (Scott Lurndal) - 2024-06-04 19:23 +0000
            Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-04 20:57 +0100
              Re: Writing own source disk Mikko <mikko.levanto@iki.fi> - 2024-06-05 11:13 +0300
                Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-05 09:23 +0100
    Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-03 00:10 +0100
      Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-03 05:16 +0100
      Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-03 05:19 +0100
      Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 10:31 +0100
        Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-03 11:01 +0100
          Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 12:58 +0100
            Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-03 13:37 +0100
              Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-03 14:50 +0100
              Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 14:55 +0100
                Re: Writing own source disk bart <bc@freeuk.com> - 2024-06-03 15:34 +0100
                Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 19:36 +0100
              Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-04 00:35 +0100
          Re: Writing own source disk Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-03 17:33 -0700
            Re: Writing own source disk Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-03 17:35 -0700
              Re: Writing own source disk David Brown <david.brown@hesbynett.no> - 2024-06-04 09:30 +0200
              Re: Writing own source disk Mikko <mikko.levanto@iki.fi> - 2024-06-05 11:19 +0300
                Re: Writing own source disk Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-05 08:29 +0000
                Re: Writing own source disk Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-05 11:10 -0700
                Re: Writing own source disk scott@slp53.sl.home (Scott Lurndal) - 2024-06-05 18:23 +0000
                Re: Writing own source disk Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-05 11:26 -0700
                Re: Writing own source disk David Brown <david.brown@hesbynett.no> - 2024-06-05 21:27 +0200
        Re: Writing own source disk Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-03 23:56 +0000
          Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-04 12:10 +0100
  Re: Writing own source disk Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-02 23:18 +0000
  Re: Writing own source disk Michael S <already5chosen@yahoo.com> - 2024-06-03 16:04 +0300
    Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-03 14:47 +0100
      Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-04 01:18 +0100
        Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-04 14:33 +0100
          Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-04 19:41 +0100
            Re: Writing own source disk Richard Harnden <richard.nospam@gmail.invalid> - 2024-06-04 21:04 +0100
            Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-06 18:00 +0100
              Re: Writing own source disk Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-06-06 20:24 +0100
                Re: Writing own source disk Ben Bacarisse <ben@bsb.me.uk> - 2024-06-07 20:04 +0100

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