ref: 49f55fb7903b4e43de866ccf978b5a3d6985dfa4
dir: /sys/src/libc/port/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;
}