ref: c31d542ae4bfebfe4d44b0b4003ae9c9dc613b51 dir: /lib/c/strrchr.c/
#include <string.h> #undef strrchr char * strrchr(const char *s, int c) { const char *t = s; while (*t) ++t; while (t > s && *t != c) --t; return (*t == c) ? (char *)t : NULL; }