Re: form_driver and wide-char

[Brian Tan]

Thomas Dickey wrote:
> On Wed, 6 Dec 2006, Brian Tan wrote:
>
> > Thomas Dickey wrote:
> > > On Wed, 6 Dec 2006, Brian Tan wrote:
> > >
> > > > Hi
> > > >
> > > > I am trying to use form_driver with utf8 Chinese input. It seems 
> > > > that form_driver (FC6 ncurses-devel-5.5-24.20060715 FC6) not 
> > > > supporting wide-char
> > >
> > > The rpm spec file says it builds libncurses and libncursesw,
> > > and the corresponding libform, libformw, etc.
> > >
> > > You should link against -lformw -lncursesw, etc
> >
> > Yes, as mentioned in my email, program is linked against formw and 
> > ncursesw. form_driver ignores any non-ascii char. Is there a "w" 
> > equivalent of form_driver (like get_wch vs getch) that I can use ?
>
> sorry - I misread the email. form_driver() only knows how to read bytes.
>
> I hadn't really considered that, since most of the internals of 
> form_driver() are also using bytes rather than wide characters.
>
> It might be nice to have an alternate interface, but I was more
> interested in making the form_driver() interface work properly.
>
> Reading your email more closely, I'm not sure whether you are reporting
> a problem with set_field_buffer() or with form_driver() - or both.
I am working on "internationalising" an existing 4GL compiler, and got 
stuck with form_driver for input. As form_driver not accepting 
non-Ascii, I was thinking of a bypass; using form_driver for Ascii and 
accessing field buffer directly for widechar.

I guess I am reporting problem with

1. field_buffer(); it does not return mbs correctly. For example, wchar 
0x597d -> mbs e5a5bd written with set_field_buffer(), screen form 
updates and shows “好 " (with trailing space due to strlen=3, I think) 
but field_buffer() returns c3a5c2a5c2bd, making further wchar entry not 
possible, unless I keep track of field buffer independently.

2. form_driver; for not accepting wchar or mbs :)

Thank You
Brian


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