Re: [Boost-users] string_algo and utf8 locales

I'm not sure if you find a std-verion, that will work with utf-8 here. I have checked the standard and case conversion that is present in locales is definitely not able to perform case conversion on variable-size encodings. Even the batch version is defined in terms of per-character conversion. Unless I'm missing something, standard is quite restrictive here. Regards, Pavol Maik Beckmann wrote:

Thank you for the hint. I will google for it and try get the std-versions to work on utf8 or ucs4 (maybe I have to use ICU oder can use glib(mm) ).

Regards, Maik

...

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:

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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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