ref: 5fffd4ac0ac75d6ba1d8e978a9c618ede9e5f2e5 dir: /lib/c/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; }