std :: string.c_str（）使用什么编码？ [英] What encoding does std::string.c_str() use?

问题描述

我试图将C ++ std :: string 转换为UTF-8或 std :: wstring 丢失信息（考虑包含非ASCII字符的字符串）。

I am trying to convert a C++ std::string to UTF-8 or std::wstring without losing information (consider a string that contains non-ASCII characters).

根据 http://forums.sun.com/thread.jspa?threadID=486770&forumID=31 ：

如果std :: string有非ASCII字符，你必须提供一个函数，从你的编码转换为UTF-8 [...]

If the std::string has non-ASCII characters, you must provide a function that converts from your encoding to UTF-8 [...]

std :: string.c_str（）使用什么编码？如何以跨平台方式将其转换为UTF-8或 std :: wstring ？

What encoding does std::string.c_str() use? How can I convert it to UTF-8 or std::wstring in a cross-platform fashion?

推荐答案

std :: string 本身不使用编码 - 它会返回你放入的字节。例如，这些字节可能使用ISO-8859-1编码...或任何其他，真的：关于编码的信息只是不是 - 你必须知道字节来自哪里！

std::string per se uses no encoding -- it will return the bytes you put in it. For example, those bytes might be using ISO-8859-1 encoding... or any other, really: the information about the encoding is just not there -- you have to know where the bytes were coming from!

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