[fpc-devel] twide3.pp on windows
daniel.mantione at freepascal.org
Mon Jul 16 20:49:59 CEST 2007
Op Mon, 16 Jul 2007, schreef Yury Sidorov:
> From: "Daniël Mantione" <daniel.mantione at freepascal.org>
> > Op Mon, 16 Jul 2007, schreef Yury Sidorov:
> > > The code page (locale) is set in Control Panel for whole user
> > > session (or
> > > whole system).
> > > It is not possible to set utf8 as locale.
> > I know. How do you set it to a specific locale for the current
> > application?
> widestring to ansistring conversion is performed using WideCharToMultiByte.
> Currently it is done using ANSI code page specified in Control Panel.
> There is no per application code page setting in Windows.
There must be, because the CRT unit currently seems to do such vodoo
(which is questionable behaviour by the way).
> > > We can create flag in System unit which control how
> > > widestring<->ansistring
> > > should be performed to enable utf8 on Windows.
> > No, you cannot (at least not with full functionality), since uppercasing
> > and compare operations on UTF-8 ansistrings you need a Unicode library,
> > which Windows does only provide in UTF-16 flavour.
> WideCharToMultiByte can convert from widestring to utf8 if corresponding flag
> is specified. This flag is available in Windows 98/Me, Windows NT 4.0 and
> MultiByteToWideChar do reverse conversion.
> This functions already used in System unit for Windows.
Yes, but how would you implement ansiuppercase and friends when utf8 flag
is set to true?
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