如何比较utf8字符串如波斯语在c ++中？ [英] how can I compare utf8 string such as persian words in c++?

问题描述

我想比较波斯语中的字符串（utf8）。我知道我必须使用一些东西像Lگل，它必须保存在wchar_t *或wstring。问题是当我通过比较函数compare（）字符串我没有得到正确的结果。

I want to compare strings in Persian (utf8). I know I must use some thing like L"گل" and it must be saved in wchar_t * or wstring. the question is when I compare by the function compare() strings I dont get the right result.

推荐答案

想要比较是在一个特定的，明确的编码已经，然后不使用 wchar_t ，不要使用 L文字 - 这些不是用于Unicode，而是用于实现定义的不透明编码 < a>。

If the strings that you want to compare are in a specific, definite encoding already, then don't use wchar_t and don't use L"" literals -- those are not for Unicode, but for implementation-defined, opaque encodings only.

如果您的字符串是UTF-8，请使用 char 的字符串。如果你想将它们转换为原始的Unicode代码点（UCS-4 / UTF-32），或者如果你已经有这些形式，它们存储在 uint32_t

If your strings are in UTF-8, use a string of chars. If you want to convert them to raw Unicode codepoints (UCS-4/UTF-32), or if you already have them in that form, store them in a string of uint32_ts, or char32_ts if you have a modern compiler.

如果你有C ++ 11，你的文字可以 char str8 [] = u8گل; 或 char32_t str32 [] = Uگل; 。 有关详情，请参阅此主题。

If you have C++11, your literal can be char str8[] = u8"گل"; or char32_t str32[] = U"گل";. See this topic for some more on this.

如果要与命令行参数或环境交互，请使用 iconv（）将WCHAR转换为UTF-32或UTF -8。

If you want to interact with command line arguments or the environment, use iconv() to convert from WCHAR to UTF-32 or UTF-8.

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