wchar_t * locale_to_wchar(char * str)
{
    wchar_t * ptr;
    size_t s;

    /* first arg == NULL means ‘calculate needed space’ */
    s = mbstowcs(NULL, str, 0);

    /* a size of -1 is triggered by an error in encoding; never
*        happen in ISO-8859-* locales, but possible in UTF-8 */
    if(s == -1)
        return(NULL);

    /* malloc the necessary space */
    if((ptr = (wchar_t *)malloc((s + 1) * sizeof(wchar_t))) == NULL)
        return(NULL);
        printf(„%dn”,s);

    /* really do it */
    mbstowcs(ptr, str, 100);

    /* ensure NULL-termination */
    ptr[s] = L”;
  /* remember to free() ptr when done */
    return(ptr);
}

void main () {
        char *str;
        wchar_t *uni;

        setlocale(LC_ALL, „hu_HU”);
        str=malloc(300);
        str=”ödön”;
        uni=locale_to_wchar(str);
        if (uni==NULL) { printf(„nulln”); } else {printf(„%sn”,uni);}
}