OFF32B            32 pack.c         #   define OFF32(p) OFF32B(p)
OFF32B           644 pack.c         		rb_str_buf_cat(res, OFF32B(&l), NATINT_LEN(long,4));
OFF32B           1375 pack.c         		memcpy(OFF32B(&tmp), s, NATINT_LEN(unsigned long,4));