如何使用 boost::asio:write 调用发送 ICU UnicodeString？

发布于 2024-11-06 09:17:24 字数 692 浏览 4 评论 0原文

我目前正在使用 ICU 库来处理 Unicode 数据，并尝试通过套接字发送 UnicodeString。目前正在查看使用基本时间服务器的示例：

boost::asio::async_write(socket_, boost::asio::buffer(message_),
    boost::bind(&tcp_connection::handle_write, shared_from_this(),
    boost::asio::placeholders::error,
    boost::asio::placeholders::bytes_transferred)
);

现在，我查看了各种函数签名，看起来 boost::asio::buffer 可以采取boost::asio::const_buffer，但我不确定在给定 UnicodeString 的情况下如何进行转换。我应该如何转换为 const_buffer，或者是否有其他方法可以做到这一点？提前感谢您的所有回复。

原文

I'm currently using the ICU library to handle Unicode data, and am trying to send a UnicodeString over a socket. Currently looking at the example using a basic time server:

Daytime.3 - An asynchronous TCP daytime server

boost::asio::async_write(socket_, boost::asio::buffer(message_),
    boost::bind(&tcp_connection::handle_write, shared_from_this(),
    boost::asio::placeholders::error,
    boost::asio::placeholders::bytes_transferred)
);

Now, I've looked over various function signatures and it looks as though boost::asio::buffer can take a boost::asio::const_buffer, but I'm not sure on how the conversion to it works given a UnicodeString. How should I go about converting to const_buffer, or is there another way I should be going about doing this? Thank you ahead of time for all responses.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

佞臣 2024-11-13 09:17:24

假设您想使用 UnicodeString 的默认内部编码发送数据（而不是强制使用 UTF-8 或 UTF-32），则以下内容应该有效：

// given UnicodeString ustr
boost::asio::const_buffer(ustr.getBuffer(), ustr.length() * sizeof(UChar));

请参阅 UnicodeString::getBuffer() 和 UnicodeString: :length() 了解更多信息。

编辑（回应评论）：要发送标准化的UTF-32数据，请尝试这样的操作（添加错误处理并根据需要延长对象生命周期）：

UErrorCode err = U_ZERO_ERROR;
int32_t const size = ustr.toUTF32(0, 0, err);
err = U_ZERO_ERROR;
std::vector<UChar32> databuf(size);
ustr.toUTF32(&databuf[0], size, err);
boost::asio::const_buffer(&databuf[0], databuf.size() * sizeof(UChar32));

Assuming you want to send the data using UnicodeString's default internal encoding (instead of forcing e.g. UTF-8 or UTF-32), then the following should work:

// given UnicodeString ustr
boost::asio::const_buffer(ustr.getBuffer(), ustr.length() * sizeof(UChar));

See UnicodeString::getBuffer() and UnicodeString::length() for more information.

EDIT (in response to comment): To send normalized UTF-32 data, try something like this (adding error handling and extending object lifetime as necessary):

UErrorCode err = U_ZERO_ERROR;
int32_t const size = ustr.toUTF32(0, 0, err);
err = U_ZERO_ERROR;
std::vector<UChar32> databuf(size);
ustr.toUTF32(&databuf[0], size, err);
boost::asio::const_buffer(&databuf[0], databuf.size() * sizeof(UChar32));

回复收藏 0 原文

~没有更多了~