Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #102715 > unrolled thread

Finding the position of a character in a string.

Back to article view | Back to comp.lang.c

Contents

  Finding the position of a character in a string. janus <emekamicro@gmail.com> - 2017-01-29 10:10 -0800
    Re: Finding the position of a character in a string. fir <profesor.fir@gmail.com> - 2017-01-29 10:27 -0800
      Re: Finding the position of a character in a string. Chad <cdalten@gmail.com> - 2017-01-29 12:07 -0800
    Re: Finding the position of a character in a string. Ike Naar <ike@iceland.freeshell.org> - 2017-01-29 21:49 +0000

#102715 — Finding the position of a character in a string.

Hello All,

Is there  a standard function for finding character index Or a better way that what I have below?

	 char *sop = "+-*/()=,.#<>[];";
	 char *chpos = strchr(sop, ch);
	 int idx = chpos == NULL ? -1 : chpos - sop;

Regards, Janus

[toc] | [next] | [standalone]

#102718

W dniu niedziela, 29 stycznia 2017 19:11:03 UTC+1 użytkownik janus napisał:
> Hello All,
> 
> Is there  a standard function for finding character index Or a better way that what I have below?
> 
> 	 char *sop = "+-*/()=,.#<>[];";
> 	 char *chpos = strchr(sop, ch);
> 	 int idx = chpos == NULL ? -1 : chpos - sop;
> 

im not a fan of this kind simple standard functions,
write yourself one and done

main reason is that say standard external reference is better then nonstandard reference, but no external reference is best to me (of those mentioned)

you could also craft such functions more coherent to 
your style etc 
(one could mention though that i voted for max/min 
being in stdlib but that was purely intrinsical one
and such should be supported (more by compiler than external lib)

some could also say that such functions could be intrinsinked and well optimised but except hotspots it dont quite matter (i also doubt if they would be really well optimised, in many cases back in history it showed to
be weak with that)

[i would very like (as i said) to get rid of all clib references (except sane intrinsics) in my framework but im 
just to lazy for that at the moment]

[toc] | [prev] | [next] | [standalone]

#102725

Yes. Read Knuth.

[toc] | [prev] | [next] | [standalone]

#102732

On 2017-01-29, janus <emekamicro@gmail.com> wrote:
> Is there  a standard function for finding character index Or a better way that what I have below?
>
> 	 char *sop = "+-*/()=,.#<>[];";
> 	 char *chpos = strchr(sop, ch);
> 	 int idx = chpos == NULL ? -1 : chpos - sop;

strspn / strcspn ?

[toc] | [prev] | [standalone]

Back to top | Article view | comp.lang.c

csiph-web