Groups | Search | Server Info | Login | Register
Groups > comp.unix.shell > #25951
| From | Rainer Weikusat <rweikusat@talktalk.net> |
|---|---|
| Newsgroups | comp.unix.shell, comp.unix.programmer, comp.lang.misc |
| Subject | Re: Command Languages Versus Programming Languages |
| Date | 2024-11-22 18:59 +0000 |
| Message-ID | <87cyinrt5s.fsf@doppelsaurus.mobileactivedefense.com> (permalink) |
| References | (2 earlier) <vhngoi$2p6$1@reader2.panix.com> <874j40sk01.fsf@doppelsaurus.mobileactivedefense.com> <vhq11q$nq7$1@reader2.panix.com> <877c8vtgx6.fsf@doppelsaurus.mobileactivedefense.com> <sS30P.4663$YSkc.427@fx40.iad> |
Cross-posted to 3 groups.
scott@slp53.sl.home (Scott Lurndal) writes:
> Rainer Weikusat <rweikusat@talktalk.net> writes:
[...]
>>Something which would match [0-9]+ in its first argument (if any) would
>>be:
>>
>>#include "string.h"
>>#include "stdlib.h"
>>
>>int main(int argc, char **argv)
>>{
>> char *p;
>> unsigned c;
>>
>> p = argv[1];
>> if (!p) exit(1);
>> while (c = *p, c && c - '0' > 10) ++p;
>> if (!c) exit(1);
>> return 0;
>>}
>>
>>but that's 14 lines of text, 13 of which have absolutely no relation to
>>the problem of recognizing a digit.
>
> Personally, I'd use:
>
> $ cat /tmp/a.c
> #include <stdint.h>
> #include <string.h>
>
> int
> main(int argc, const char **argv)
> {
> char *cp;
> uint64_t value;
>
> if (argc < 2) return 1;
>
> value = strtoull(argv[1], &cp, 10);
> if ((cp == argv[1])
> || (*cp != '\0')) {
> return 1;
> }
> return 0;
> }
This will accept a string of digits whose numerical value is <=
ULLONG_MAX, ie, it's basically ^[0-9]+$ with unobvious length and
content limits.
return !strstr(argv[1], "0123456789");
would be a better approximation, just a much more complicated algorithm
than necessary. Even in strictly conforming ISO-C "digitness" of a
character can be determined by a simple calculation instead of some kind
of search loop.
Back to comp.unix.shell | Previous | Next — Previous in thread | Next in thread | Find similar
Re: Command Languages Versus Programming Languages Bozo User <anthk@disroot.org> - 2024-09-30 20:04 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-30 21:04 +0000
Re: Command Languages Versus Programming Languages usuario <anthk@disroot.org> - 2024-10-01 20:18 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-02 07:10 +0000
Re: Command Languages Versus Programming Languages usuario <anthk@disroot.org> - 2024-10-02 12:52 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-02 16:00 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-09 22:25 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-10 08:38 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-10 16:09 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-10 15:34 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-10 17:55 +0100
Re: Command Languages Versus Programming Languages Kaz Kylheku <643-408-1753@kylheku.com> - 2024-10-10 19:14 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-10 21:31 +0100
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-11 00:09 +0100
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-11 15:47 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-11 15:15 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-11 15:45 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-11 15:59 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-11 16:28 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-12 08:39 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-12 13:53 +0000
Re: Command Languages Versus Programming Languages Muttley@dastardlyhq.com - 2024-10-12 14:50 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-10-12 15:32 +0000
Re: Command Languages Versus Programming Languages Muttley@dastardlyhq.com - 2024-10-12 15:51 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-12 16:36 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 08:18 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 13:43 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 14:54 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 15:30 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 16:02 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 20:15 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-14 08:25 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-14 13:38 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-14 14:47 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-10-14 14:53 +0000
Re: Command Languages Versus Programming Languages David Brown <david.brown@hesbynett.no> - 2024-10-14 17:27 +0200
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-13 21:09 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-13 21:08 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-10-13 15:08 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 15:52 +0000
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-13 17:20 +0100
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 20:29 +0000
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-14 01:20 +0100
Re: On overly rigid definitions (was Re: Command Languages Versus Programming Languages) cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-14 00:58 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-10-13 15:02 +0000
Re: Command Languages Versus Programming Languages Kaz Kylheku <643-408-1753@kylheku.com> - 2024-10-13 16:31 +0000
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-13 20:06 +0100
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-10-13 20:30 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-10-11 16:37 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-11 19:01 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-12 08:40 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-11 20:58 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-12 08:42 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-12 14:37 +0100
Re: Command Languages Versus Programming Languages Christian Weisgerber <naddy@mips.inka.de> - 2024-10-12 17:49 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 08:20 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-13 21:25 +0100
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-12 20:50 +0100
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-12 21:25 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 08:22 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-13 20:33 +0000
Re: Command Languages Versus Programming Languages Bart <bc@freeuk.com> - 2024-10-11 00:07 +0100
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-11 16:15 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-11 08:17 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-11 19:37 +0100
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-11 01:33 +0000
Re: Command Languages Versus Programming Languages Eric Pozharski <apple.universe@posteo.net> - 2024-10-12 16:39 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-13 08:19 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-10-13 14:55 +0200
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-13 21:33 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-14 08:28 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-14 11:38 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-14 11:05 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-10-14 16:04 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-10-14 15:39 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-13 20:34 +0000
Re: Command Languages Versus Programming Languages Sebastian <sebastian@here.com.invalid> - 2024-11-11 07:31 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-11 10:06 +0000
Re: Command Languages Versus Programming Languages Wolfgang Agnes <wagnes@jemoni.to> - 2024-11-11 08:28 -0300
Re: Command Languages Versus Programming Languages Muttley@dastardlyhq.com - 2024-11-11 16:21 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-11 20:55 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-12 10:14 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-12 09:21 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-12 10:31 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-12 09:53 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-12 15:05 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-12 15:09 +0000
Re: Command Languages Versus Programming Languages Wolfgang Agnes <wagnes@jemoni.to> - 2024-11-12 13:47 -0300
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-11 21:24 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-12 10:23 +0100
Re: Command Languages Versus Programming Languages Wolfgang Agnes <wagnes@jemoni.to> - 2024-11-12 13:50 -0300
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-12 20:29 +0000
Re: Command Languages Versus Programming Languages merlyn@stonehenge.com (Randal L. Schwartz) - 2024-11-19 18:43 -0800
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-20 04:34 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-20 08:21 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-20 11:51 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-20 11:30 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-20 16:38 +0100
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-20 16:38 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-20 17:54 +0000
Re: Command Languages Versus Programming Languages John Ames <commodorejohn@gmail.com> - 2024-11-20 10:03 -0800
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-21 08:18 +0000
Re: Command Languages Versus Programming Languages John Ames <commodorejohn@gmail.com> - 2024-11-21 07:56 -0800
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-21 14:13 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-21 16:06 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-21 08:13 +0000
Re: Command Languages Versus Programming Languages John Ames <commodorejohn@gmail.com> - 2024-11-21 07:58 -0800
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-20 17:50 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-21 14:40 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-21 15:07 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 13:30 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 15:41 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 15:52 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 17:18 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 17:35 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 17:43 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 17:43 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 17:17 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 17:48 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 18:12 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 18:48 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 19:05 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 19:24 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 19:46 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-11-22 18:14 +0000
Re: Command Languages Versus Programming Languages scott@slp53.sl.home (Scott Lurndal) - 2024-11-22 18:22 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 18:30 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 18:59 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 19:15 +0000
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 19:26 +0000
Re: Command Languages Versus Programming Languages cross@spitfire.i.gajendra.net (Dan Cross) - 2024-11-22 19:51 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-22 12:14 +0100
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-22 11:56 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-22 20:33 +0100
Re: Command Languages Versus Programming Languages Kaz Kylheku <643-408-1753@kylheku.com> - 2024-11-21 19:12 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-22 10:09 +0000
Re: Command Languages Versus Programming Languages Kaz Kylheku <643-408-1753@kylheku.com> - 2024-11-22 18:18 +0000
Re: Command Languages Versus Programming Languages Muttley@dastardlyhq.com - 2024-11-23 11:40 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-22 12:17 +0100
Re: Command Languages Versus Programming Languages Kaz Kylheku <643-408-1753@kylheku.com> - 2024-11-22 18:19 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-22 20:20 +0100
Re: Command Languages Versus Programming Languages Ed Morton <mortonspam@gmail.com> - 2024-11-20 05:46 -0600
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-20 12:27 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-20 21:43 +0000
Re: Command Languages Versus Programming Languages Muttley@DastartdlyHQ.org - 2024-11-21 08:15 +0000
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-21 22:05 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-22 12:47 +0100
Re: Command Languages Versus Programming Languages Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-22 20:41 +0000
Re: Command Languages Versus Programming Languages Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-11-20 16:53 +0100
Re: Command Languages Versus Programming Languages Ed Morton <mortonspam@gmail.com> - 2024-11-23 18:17 -0600
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-20 12:21 +0000
Re: Command Languages Versus Programming Languages merlyn@stonehenge.com (Randal L. Schwartz) - 2024-11-21 05:38 -0800
Re: Command Languages Versus Programming Languages Rainer Weikusat <rweikusat@talktalk.net> - 2024-11-21 17:01 +0000
csiph-web