ref: ae0d5a79909f7779bb0ba3d5bdfd0d9cdd959f2f
dir: /sys/src/cmd/unix/drawterm/libc/runestrrchr.c/
#include <u.h>
#include <libc.h>
Rune*
runestrrchr(Rune *s, Rune c)
{
Rune *r;
if(c == 0)
return runestrchr(s, 0);
r = 0;
while(s = runestrchr(s, c))
r = s++;
return r;
}