ref: 4c00c4e8204f98a5859ef6c0bfe8d2e4d6f168d2 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; }