ref: 7d06d1d348ce9fb9dc585d81f146e12193be85e4
dir: /src/libc/string/memchr.c/
#include <string.h> #undef memchr void * memchr(const void *s, int c, size_t n) { unsigned char *bp = (unsigned char *) s; while (n > 0 && *bp++ != c) --n; return (n == 0) ? NULL : bp-1; }