On 2026-02-19T01:53:01+0100, Alejandro Colomar wrote:
> 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);
And avoiding the cast:
#define strnul(s) strchr(s, '\0')
char *
strchrnul(const char *s, int c)
{
return strchr(s, c) ?: strnul(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>
--
<https://www.alejandro-colomar.es>
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