On 2026-02-18T23:21:34+0100, Alejandro Colomar wrote:
> Hi Crystal,
>
> On 2026-02-18T21:58:24+0000, Crystal Kolipe via Mutt-dev wrote:
> > On Wed, Feb 18, 2026 at 03:29:57PM +0100, Alejandro Colomar via Mutt-dev
> > wrote:
> > > BTW, with the macros shown above, one could implement:
> > >
> > > #define streq(a,b) (strcmp(a,b) == 0)
> > >
> > > #define isspace_c(c) (!streq(strchrnul(MUTT_CTYPE_SPACE_C,
> > > c), ""))
> > > #define isspace_rfc5322_fws(c)
> > > (!streq(strchrnul(MUTT_CTYPE_RFC5322_FWS, c), ""))
> > >
> > > Although, in general, using the strspn(3) family of functions directly
> > > seems more ergonomic.
> >
> > Note that strchrnul() is not available natively on OpenBSD.
>
> D'oh! Well, I guess we could add it as a fallback there.
> I hope POSIX takes this API eventually.
>
> Here's a naive definition:
>
> char *
> strchrnul(const char *s, int c)
> {
> char *p;
>
> p = strchr(s, c);
> if (p == NULL)
> return (char *) s + strlen(s);
> return p;
This can be compacted into a one-liner:
return strchr(s, c) ?: (char *) s + strlen(s);
All compilers that I know, support '?:'. It will be discussed for
standardization next month.
> }
>
> Here's another one, which might be more or less readable:
>
> char *
> strchrnul(const char *s, int c)
> {
> char r[2] = {c, '\0'};
>
> return (char *) s + strcspn(s, r);
> }
>
> Disclaimer: I haven't tested these yet.
>
>
> Have a lovely night!
> Alex
>
> --
> <https://www.alejandro-colomar.es>
--
<https://www.alejandro-colomar.es>
signature.asc
Description: PGP signature
