ref: 81b6d6367c1c9c957ca910e5f8b5fb70adfa9c21 dir: /lib/c/src/strchr.c/
#include <string.h> #undef strchr char * strchr(const char *s, int c) { while (*s && *s != c) ++s; return (*s == c) ? (char *)s : NULL; }