void cv_vector_insert_block(cv_vector hwv, size_t pos, cv_iterator begin, cv_iterator end)
{
    if (cv_vector_empty(hwv)) 
        CV_Error(STS_NULL_PTR, "cv_vector is a null pointer");
    // 判断 pos 是否越界 < 0 || > cv_size
    if (pos < 0 || pos > hwv->cv_size)
        CV_Error(STS_BAD_ARG, "param is bad");
    // 计算新尺寸
    size_t new_size = hwv->cv_size + ((char*)end - (char*)begin) / hwv->elem_size;
    // 计算并调节新容量
    while (hwv->cv_capacity < new_size)
        hwv->cv_capacity <<= EXPANED_VAL;
    adjust_capacity(hwv, hwv->cv_capacity);
    // pos 是不是末尾元素 = cv_size
    if (pos == hwv->cv_size) {
        memcpy((char*)hwv->data + pos * hwv->elem_size, begin, (char*)end - (char*)begin);
    } else {
        cv_iterator src = cv_vector_index_to_iter(hwv, pos);
        size_t bytes = ((char*)end - (char*)begin);
        cv_iterator dst = (char*)src + bytes;
        memmove(dst, src, bytes);
        memcpy(src, begin, bytes);
    }
    // 更新尺寸
    hwv->cv_size = new_size;
}