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How would someone use Window's UTF16LE unicode aware APIs with Perl's ASCII until infected with UTF8 string system in XS? I looked for examples of MultiByteToWideChar in perl's source.
1. in win32/win32.c#l815 in perl.git and MultiByteToWideChar was set up with "CP_ACP ANSI code page" always.
2. In cpan/Win32/Win32.xs#l161 in perl.git, the SV is checked for utf8 flag, if so its converted as CP_UTF8, otherwise, CP_ACP.
3. or better to force all SVs to utf8 using perl api before MultiByteToWideChar then with CP_UTF8 like in
4. Or is it best to leave is to the caller to UTF16LE encode their scalars using Encode and pass "binary garbage" scalars to XS, then nothing but a SvPV, and cast the PV */char * to a wchar_t * the way its done in Win32API::File?
5. use mbstowcs instead of MultiByteToWideChar? mbstowcs uses null string end marking, not exactly safe
6. so far all examples of MultiByteToWideChar, the flags parameter has been zero, except for, where its MB_PRECOMPOSED for ascii and 0 for utf8. Whats the correct handling for the flags parameter of MultiByteToWideChar?

In reply to Re: Directory operations and Unicode by patcat88
in thread Directory operations and Unicode by nikosv

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