ref: bf2a6f786502026ce4229bc84a6a22e5e55a7c13
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; }