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Re: Command line globber/tokenizer library for C?

From Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups comp.lang.c
Subject Re: Command line globber/tokenizer library for C?
Date 2024-09-18 06:01 -0700
Organization A noiseless patient Spider
Message-ID <86wmj986aa.fsf@linuxsc.com> (permalink)
References (12 earlier) <20240915122211.000058b1@yahoo.com> <vcd05n$q3mn$1@paganini.bofh.team> <20240918024611.000002f3@yahoo.com> <vcd5jk$3oe5h$1@dont-email.me> <20240918114305.00002317@yahoo.com>

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Michael S <already5chosen@yahoo.com> writes:

[...]

> Since I am not accustomed to the functional programming style, for
> me even a boring variant [not shown] is way too entertaining.  I
> prefer mundane (untested, could be buggy):
>
> static
> const char* collect_word(const char *s) {
>   _Bool w = 0;
>   char c;
>   while ((c = *s) != 0) {
>     if (!w && is_space(c))
>       break;
>     if (c == '"')
>       w = !w;
>     ++s;
>   }
>   return s;
> }
>
> void words_do(const char *s, Gopher go ){
>   char c;
>   while ((c = *s) != 0) {
>     if (is_space(c)) {
>       ++s;
>     } else {
>       const char *r = s;
>       s = collect_word(s);
>       go->f(go, r, s);
>     }
>   }
> }

If writing in an imperative-rather-than-functional style, I would
likely gravitate toward something like this:


   static  const char *process_word( const char *, Gopher );

   void
   words_do( const char *s, Gopher go ){
      char   c;

      while(  c = *s++  ){
         if( ! is_space(c) )  s = process_word( s-1, go );
      }
   }

   const char *
   process_word( const char *r, Gopher go ){
      const char *s = r;
      _Bool       q = 0;

      do  q ^= *s++ == '"';  while(  *s && (q || !is_space(*s))  );

      return   go->f( go, r, s ),   s;
   }


which seems to result in slightly better generated code than my
functional version, in a few spot checks using gcc or clang
under various -O settings (-Os, -O2, -O3).

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Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-10 19:01 +0000
  Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-10 20:58 +0000
    Re: Command line globber/tokenizer library for C? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-09-10 14:12 -0700
  Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-10 23:05 +0200
    Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-10 22:11 +0000
  Re: Command line globber/tokenizer library for C? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-09-10 14:37 -0700
    Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-10 22:13 +0000
  Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-11 01:56 +0000
    Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-11 02:54 +0000
  Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-11 14:17 +0200
    Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-11 12:22 +0000
      Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-11 14:28 +0200
        Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-11 12:44 +0000
    Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-11 13:42 +0100
    Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-11 14:59 +0000
      Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-11 20:14 +0200
        Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-11 18:17 +0000
        Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-11 18:49 +0000
          Re: Command line globber/tokenizer library for C? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-09-11 14:43 -0700
            Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-12 03:06 +0000
              Re: Command line globber/tokenizer library for C? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-09-11 20:37 -0700
                Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-12 03:56 +0000
                Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 13:22 +0000
                Re: Command line globber/tokenizer library for C? ted@loft.tnolan.com (Ted Nolan <tednolan>) - 2024-09-12 13:50 +0000
                Columbia (Was: Command line globber/tokenizer library for C?) gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 14:06 +0000
                Re: Columbia (Was: Command line globber/tokenizer library for C?) Michael S <already5chosen@yahoo.com> - 2024-09-12 17:20 +0300
                Re: Columbia (Was: Command line globber/tokenizer library for C?) David Brown <david.brown@hesbynett.no> - 2024-09-12 16:43 +0200
                Re: Columbia (Was: Command line globber/tokenizer library for C?) Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-12 22:07 +0000
              Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-12 04:14 +0000
              Re: Command line globber/tokenizer library for C? Ben Bacarisse <ben@bsb.me.uk> - 2024-09-12 10:43 +0100
        Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-11 21:19 +0100
          Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 04:22 +0200
            Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-12 12:29 +0100
              Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 12:13 +0000
                Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 14:24 +0200
                Other programming languages (Was: Command line globber/tokenizer library for C?) gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 13:20 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 16:01 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 14:07 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 16:14 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 17:40 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 17:48 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 17:59 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-12 22:32 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-09-12 18:50 -0400
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 01:37 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Michael S <already5chosen@yahoo.com> - 2024-09-13 11:30 +0300
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-13 04:06 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 02:58 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-13 14:31 +0200
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Kaz Kylheku <643-408-1753@kylheku.com> - 2024-09-13 04:18 +0000
                Re: Other programming languages (Was: Command line globber/tokenizer library for C?) Kaz Kylheku <643-408-1753@kylheku.com> - 2024-09-13 03:38 +0000
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 16:00 +0200
              Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 14:20 +0200
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-12 14:44 +0100
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-12 15:16 +0100
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 16:23 +0200
                Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 17:46 +0200
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-12 17:15 +0100
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 18:26 +0200
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-12 18:16 +0300
                Re: Command line globber/tokenizer library for C? scott@slp53.sl.home (Scott Lurndal) - 2024-09-12 15:37 +0000
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-12 18:49 +0300
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-12 17:28 +0100
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 19:02 +0200
                Re: Command line globber/tokenizer library for C? gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 17:39 +0000
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-12 22:38 +0300
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-13 07:28 +0200
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-13 11:38 +0300
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-13 14:12 +0200
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-13 15:25 +0300
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-13 15:20 +0200
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 22:24 +0000
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-14 01:42 +0200
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-14 01:41 +0000
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-13 09:05 -0700
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-15 12:22 +0300
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-16 00:52 -0700
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-16 12:23 +0300
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-17 03:12 -0700
                Re: Command line globber/tokenizer library for C? antispam@fricas.org - 2024-09-17 22:34 +0000
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-17 16:33 -0700
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-18 02:46 +0300
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-18 01:07 +0100
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-18 11:43 +0300
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-18 10:49 +0100
                Re: Command line globber/tokenizer library for C? David Brown <david.brown@hesbynett.no> - 2024-09-18 12:44 +0200
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-18 06:01 -0700
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-17 18:31 -0700
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-18 11:03 +0300
                Re: Command line globber/tokenizer library for C? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-18 05:09 -0700
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-18 02:20 +0000
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-18 11:05 +0300
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 16:04 +0200
                Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 17:30 +0200
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 17:47 +0200
                Re: Command line globber/tokenizer library for C? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-09-12 17:56 +0200
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 18:09 +0200
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 02:43 +0000
                Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-13 07:27 +0200
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 06:49 +0000
                Re: Command line globber/tokenizer library for C? Michael S <already5chosen@yahoo.com> - 2024-09-13 11:49 +0300
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-13 22:04 +0000
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-13 23:48 +0100
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-14 01:41 +0000
                Re: Command line globber/tokenizer library for C? Bart <bc@freeuk.com> - 2024-09-14 10:58 +0100
                Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-14 22:37 +0000
              Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 15:58 +0200
  Re: Command line globber/tokenizer library for C? Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 17:08 +0200
    More OT BS (Was: Command line globber/tokenizer library for C?) gazelle@shell.xmission.com (Kenny McCormack) - 2024-09-12 15:23 +0000
      Re: More OT BS (Was: Command line globber/tokenizer library for C?) Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-12 17:24 +0200
    Re: Command line globber/tokenizer library for C? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-12 22:09 +0000

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