initialize_copy

static VALUE
rb_stat_init_copy(VALUE copy, VALUE orig)
{
    struct stat *nst;

    if (!OBJ_INIT_COPY(copy, orig)) return copy;
    if (DATA_PTR(copy)) {
        xfree(DATA_PTR(copy));
        DATA_PTR(copy) = 0;
    }
    if (DATA_PTR(orig)) {
        nst = ALLOC(struct stat);
        *nst = *(struct stat*)DATA_PTR(orig);
        DATA_PTR(copy) = nst;
    }

    return copy;
}