UTF-8 in XMLWriter

[VaKa78]

Hello to everyone!

To quickly add UTF-8 support in XmlStream Class (inside XmlWriter.h) I overload << operator for _tstring:

XmlStream& operator<<(const _tstring& value) 
{
    return PutUtf8String( value );
}

XmlStream& operator<<(_tstring& value) 
{
    return PutUtf8String ( value );
}

And add following function:

XmlStream& PutUtf8String (const _tstring& value) 
{
    //calc block size to be returned
    int len = MultiByteToWideChar(CP_ACP, NULL, value.c_str(), value.size(), NULL, 0);

    //malloc and fill the returned block
    wchar_t* szUnicode = new wchar_t[len+1];

    MultiByteToWideChar(CP_ACP, NULL, value.c_str(), value.size(), szUnicode, len);
    szUnicode[len] = 0;
    std::wstring tempVal = szUnicode;
    delete[] szUnicode;

    int nInputLen = tempVal.length();
    int nChars = WideCharToMultiByte(CP_UTF8, 0, tempVal.c_str(), nInputLen, NULL, 0, NULL, NULL); 
    if (nChars)
    {
        char* pszUTF8 = new char[nChars+1];
        nChars = WideCharToMultiByte(CP_UTF8, 0, tempVal.c_str(), nInputLen, pszUTF8, nChars, NULL, NULL);
        if (nChars)
        {
            pszUTF8[nChars] = '\0';

          if (stateTagName == state)
             tagName << pszUTF8;
          s << pszUTF8;
        }
        delete [] pszUTF8;
    }
    return *this;
}

Now three provided test works with UTF (at least Russian text displayed as typed)
Yes, it quick and dirty, but it works ;)

[FinnG]

WideCharToMultiByte might not work because i use unicode, std::wofstream << std::string is the problem.
Instead, i figure it out using boost.

if you have built "boost filesystem",
then you only have to modify xmlwriter.h:
add

#include <boost/filesystem/detail/utf8_codecvt_facet.hpp>

and, line 38
s.imbue(std::locale("C"));
modify it to

s.imbue(std::locale(std::locale(), new boost::filesystem::detail::utf8_codecvt_facet));

done.
however, if you have not built boost filesystem and you won't plan to,
then steps are more complicated as below.

.............................................................................
insert code below to xmlwriter.h, line 8

#define BOOST_UTF8_BEGIN_NAMESPACE namespace name_it {
#define BOOST_UTF8_DECL
#define BOOST_UTF8_END_NAMESPACE }
#include <boost/detail/utf8_codecvt_facet.hpp>
#undef BOOST_UTF8_END_NAMESPACE
#undef BOOST_UTF8_DECL
#undef BOOST_UTF8_BEGIN_NAMESPACE

xmlwriter.h, line 38, delete or comment it, as
// s.imbue(std::locale("C"));
and insert code below

s.imbue(std::locale(std::locale(), new name_it::utf8_codecvt_facet));

insert code below to Workbook.cpp, line 54

#define BOOST_UTF8_BEGIN_NAMESPACE namespace name_it {
#define BOOST_UTF8_DECL
#define BOOST_UTF8_END_NAMESPACE }
#include <boost/detail/utf8_codecvt_facet.ipp>
#undef BOOST_UTF8_END_NAMESPACE
#undef BOOST_UTF8_DECL
#undef BOOST_UTF8_BEGIN_NAMESPACE

....................................................................................................
done, try it with
SimpleXlsx::CWorkbook book;
SimpleXlsx::CWorksheet &sheet = book.AddSheet(L"檊");
SimpleXlsx::CellDataStr cds;
cds.value = L"檊";
sheet.BeginRow();
sheet.AddCell(cds);
sheet.EndRow();
It works.
Remarks:
SimpleXlsx version 0.20
Visual Studio 2010 Express, Win32, unicode, boost_1_58_0