Re: wide char string literals to Glib ustring

[Armin Burgmeier <armin arbur net>]

On Sat, 2007-12-08 at 07:03 -0500, Onur Tugcu wrote:
> Hi,
> I'm writing my strings hardcoded into the program, so I want to make
> use of string literals in C++.

I think the easiest thing to do is not to use wchar_t at all but
directly encode the string literals in UTF-8.

> When I use gtkmm with vc++ 2005, sizeof(wchar_t) is 2.
> So I assumed utf-16 encoding and wrote:
> 
> Glib::ustring w2ustring(std::wstring const &w)
> {
>   gunichar2 const* utf16= reinterpret_cast<gunichar2 const*>(w.c_str());
>   gchar* utf8= g_utf16_to_utf8(utf16, -1, 0, 0, 0);
>   Glib::ustring u(utf8); g_free(utf8);
>   return u;
> }
> 
> Which seems to work great like
> Glib::ustring u(w2ustring(L"üö"));
> 
> But on linux with a unicode terminal,
> 
> I can just set
> std::locale::global(std::locale("en_US.UTF-8"));
> Glib::ustring u(Glib::locale_to_utf8("üö"));
> 
> And the code up there doesn't work (wchar_t is actually 4 bytes)
> And even the ucs4 output warnings and the resulting ustring is garbage
> or I get a segfault.
> So no utf16 to utf8 or ucs4 to utf8 conversions.
> 
> Shall I use two separate codes for these platforms?
> Is there a unified solution?

Armin