Re: [Jsoncpp-devel] jsoncpp unicode

[Stephan B. <sg...@go...>]

On Mon, Apr 19, 2010 at 4:37 PM, <ma...@al...> wrote:

>  I decided to use jsoncpp in my application, but faced an issue !
>
> The application uses std:wstring for JSON message values due to unicode
> maintenance,
>
> but I don’t see how I can form JSON message through Json::Value.
>
> So, why it doesn’t support std::wstring and how it could be solved ?
>

std::wstring uses an unspecified character size and (AFAIK) byte ordering.
e.g. gcc's wstring uses 4-byte characters. i recently implemented a
conversion from wstring to std::basic_string<uint16_t> for use with utf8cpp,
and it looks like this:

ValueType == basic_string<uint16_t>

    void Utf16String::init( wchar_t const * v, size_t len )
    {
        size_t const sl = (v&&len) ? len : 0;
        if( ! sl )
        {
            this->init( ValueType(), 0 );
            return;
        }
        ValueType vec;
        vec.reserve( sl );
        vec.assign( v, v+sl );
        this->init( vec, 0);
    }

    Utf16String::Utf16String( std::wstring const & v )
    {
        this->init( v.empty() ? 0 : v.c_str(), v.size() );
    }

however, i don't know if that will work as-is for both big- and
little-endian.

i hope this helps a little bit.

-- 
----- stephan beal
http://wanderinghorse.net/home/stephan/