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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c
Subject: Re: Something like string-streams existing in "C"?
Date: Fri, 20 Dec 2024 12:38:40 +0200
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On Thu, 19 Dec 2024 22:06:09 -0000 (UTC)
Kaz Kylheku <643-408-1753@kylheku.com> wrote:

> On 2024-12-19, Michael S <already5chosen@yahoo.com> wrote:
> > On Thu, 19 Dec 2024 19:47:28 -0000 (UTC)
> > Kaz Kylheku <643-408-1753@kylheku.com> wrote:
> > =20
> >> On 2024-12-19, BlueManedHawk <bluemanedhawk@invalid.invalid>
> >> wrote: =20
> >> > The =E2=80=98asprintf=E2=80=99 subroutine is standardized by POSIX.1=
-2024,
> >> > meaning that you can use it now and blame somebody else if it
> >> > doesn't work. If you    =20
> >>=20
> >> Regardless of how it is made visible, you can detect it via a
> >> compile test in a configure script, and provide your own if it
> >> wasn't found:
> >>=20
> >> #if !HAVE_ASPRINTF
> >>=20
> >> int asprintf(char **out, const char *fmt, ...)
> >> {
> >>   ... // more or less trivial to implement using malloc, realloc
> >> and vsprintf =20
> >
> > Don't you mean, vsnprintf ? =20
>=20
> That detail will become obvious when you try to implement it.
>=20

It sounds like Janis would prefer different API.

struct string_buffer {
  char* ptr;
  size_t len;
  size_t cap;
};
int append_printf(struct string_buffer*, , const char *fmt, ...);

Implementation is as trivial as asprintf.