Re: [xml] Charset trouble

["Peter Jacobi" <pj walter-graphtek com>]

Hi Abylai,

"Abylai Ospan" <aospan netup ru> wrote:

> I have problem with charsets again ;-(
> I'm add in c++
> sub_subtree = xmlNewChild(subtree, NULL,(xmlChar*)
> "param_value",(xmlChar*)mstring.c_str());
>
> but following error ocure when mstring in KOI8-R charset:
>
> output conversion failed due to conv error
> Bytes: 0xC0 0xE1 0xFB 0xEB

As Daniel already pointed out, you have to convert to UTF-8 yourself.
This is totally independent on the output encoding you specify.

As you are on C++, there is a painless, stylistically pleasant
way to never forget the conversion: Put it in the stdcpp string to
char const* conversions.

I don't know if one of the publicly available libxml C++ does
this already, but I use it myself and I suspect others as
well.

Something along the lines of:

typedef xmlChar const *pxmlChar;
class XmlChar: public string {
        static char const runtimecharset [];
public:
        XmlChar (string const &s):  {
                convert (s, runtimecharset, *this, "UTF-8");
        }
        operator  pxmlChar () const {return (pxmlChar) c_string ();}
};

Usage:
sub_subtree = xmlNewChild (subtree, NULL,
        XmlChar ("param_value"), XmlChar (mstring)
);

Regards,
Peter Jacobi