ref: f2a9244e2d5cf7011c07e5a3ea34c1fa032cae5c
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; }