ref: 1d1c8b7f5320788f9c0d9736b4519e1b8e33853d
dir: /sys/src/libc/fmt/runevseprint.c/
#include <u.h>
#include <libc.h>
Rune*
runevseprint(Rune *buf, Rune *e, char *fmt, va_list args)
{
Fmt f;
if(e <= buf)
return nil;
f.runes = 1;
f.start = buf;
f.to = buf;
f.stop = e - 1;
f.flush = nil;
f.farg = nil;
f.nfmt = 0;
f.args = args;
dofmt(&f, fmt);
*(Rune*)f.to = '\0';
return f.to;
}