获得一个UTF-8 EN codeD的std ::字符串的实际长度? [英] Getting the actual length of a UTF-8 encoded std::string?
问题描述
我的std :: string是UTF-8 EN codeD如此明显,str.length()返回错误的结果。
我发现这个信息,但我不知道我怎么可以用它来做到这一点:
下面的字节序列 用于重新present一个字符。该 序列是 使用取决于字符的UCS code号:
00000000 - 0x0000007F: 0xxxxxxx 0x00000080 - 0x000007FF: 110xxxxx 10xxxxxx 0x00000800 - 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx 0x00010000在 - 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
我如何能找到一个UTF-8 EN codeD的std ::字符串的实际长度?谢谢
其中一个项目我贡献了一个小功能,做的是:
<一个href="http://openlierox.git.sourceforge.net/git/gitweb.cgi?p=openlierox/openlierox;a=blob;f=include/Uni$c$c.h;h=a523b464fc65a7ad875e683cd830b41c9a01934a;hb=HEAD">http://openlierox.git.sourceforge.net/git/gitweb.cgi?p=openlierox/openlierox;a=blob;f=include/Uni$c$c.h;h=a523b464fc65a7ad875e683cd830b41c9a01934a;hb=HEAD
查找 Utf8StringSize
。它依赖于相同的头文件中的另一个微小的作用。
my std::string is utf-8 encoded so obviously, str.length() returns the wrong result.
I found this information but I'm not sure how I can use it to do this:
The following byte sequences are used to represent a character. The sequence to be used depends on the UCS code number of the character:
0x00000000 - 0x0000007F: 0xxxxxxx 0x00000080 - 0x000007FF: 110xxxxx 10xxxxxx 0x00000800 - 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx 0x00010000 - 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
How can I find the actual length of a UTF-8 encoded std::string? Thanks
One of the projects I contribute to has a small function that does that:
Look for Utf8StringSize
. It depends on another tiny function in the same header file.
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