Re: [Boost-users] string_algo and utf8 locales

From: Pavol Droba (droba_at_[hidden])
Date: 2006-08-02 15:10:19

Hi,

To be honest, I haven't tried to use string_algo with encodings
that use variable number of bytes per character.
All algorithms work in character-wise manner, so utf enconding
might not work.

Internaly std::tolower(Ch, Loc) is used to do the conversion.
Try to see if this function works for you. If it doesn't give
the required results, algorithms in the string_algo will
not work either.

Regards,
Pavol.

Maik Beckmann wrote:
> Hello list, this is my first post to you :)
> 
> I've got a problem with handling locales and string_algo. 
> As an example I want so make this string
>         "hää?"
> uppercase (->"HÄÄ?") by using this piece of code:
> 
> <code>
>         #include <iostream>
>         #include <locale>
>         #include <string>
>         #include <boost/algorithm/string.hpp>
>         
>         
>         using namespace std;
>         using namespace boost;
>         
>         int main(int argc, char** argv) {
>         
>             string loc_name = "de_DE.utf8";
>         
>             string str("hää?");
>             str = to_upper_copy(str,locale(loc_name.c_str()));
>         
>             // ...should give "HÄÄ?"
>             cout << str << endl;
>             // but prints "Hää?"
>         
>             return 0;
>         }
> </code>
> 
> As you see I'm trying to use locales, but it doesn't work. What is my
> mistake??
> 
> Thanks in advance, Maik
> 
> PS:
> - I'm using gentoo-linux with gcc-4.1.1
> - My locales list:
>         LANG=de_DE.utf8
>         LC_CTYPE="de_DE.utf8"
>         LC_NUMERIC="de_DE.utf8"
>         LC_TIME="de_DE.utf8"
>         LC_COLLATE="de_DE.utf8"
>         LC_MONETARY="de_DE.utf8"
>         LC_MESSAGES="de_DE.utf8"
>         LC_PAPER="de_DE.utf8"
>         LC_NAME="de_DE.utf8"
>         LC_ADDRESS="de_DE.utf8"
>         LC_TELEPHONE="de_DE.utf8"
>         LC_MEASUREMENT="de_DE.utf8"
>         LC_IDENTIFICATION="de_DE.utf8"
>         LC_ALL=de_DE.utf8
>         
> 
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