Re: [Vala] embedding c code snippet in vala source.

[Alexey Lubimov <avl l14 ru>]

Jürg Billeter пишет:
> On Fri, 2008-08-22 at 05:09 -0400, Yu Feng wrote:
>   
> > On Fri, 2008-08-22 at 10:44 +0200, Jürg Billeter wrote:
> >     
> > > Maybe I'm just missing an interesting use case, however, I currently
> > > fail to see where the snippet approach makes it more comfortable to
> > > write or use bindings. Can you provide examples where you think that it
> > > makes more sense to handle it in a snippet instead of the compiler code?
> > > I'm not convinced by the g_strv_length example as this would clutter the
> > > bindings too much, in my opinion.
> > >       
> > Again it is for rare cases. I am thinking hard to make the snipples
> > working well, and I'll collect more cases later. I don't expect there to
> > be much though. Should it be much fewer than [NoArrayLength] stuff.
> >     
>
> Ok, as you agree that the null-terminated arrays should be handled, your
> g_strv_length example is not a real use case for the snippet support.
> Can you provide a concrete example where you think it makes more sense
> to use a CCode snippet than anything else?
>
>   
Another case - utf8-compatible replacement for g_strndup()

You can see 15 bugs in vala-0.3.5 sources only...

[avl localhost vala-0.3.5]$ find -name "*.vala" | xargs grep -E '\.ndup' 
| wc -l
15
[avl localhost vala-0.3.5]$ find -name "*.vala" | xargs grep -E '\.ndup'
./vala/valastringliteral.vala:        var noquotes = value.offset 
(1).ndup ((uint) (value.len () - 2));
./vala/valaparser.vala:        return ((string) 
tokens[last_index].begin.pos).ndup ((tokens[last_index].end.pos - 
tokens[last_index].begin.pos));
./vala/valageniescanner.vala:            push_comment (((string) 
begin).ndup ((long) (current - begin)), line == 1);
./vala/valageniescanner.vala:            push_comment (((string) 
begin).ndup ((long) (current - begin)), begin_line == 1);
./vala/valaintegerliteral.vala:            number = number.ndup 
(number.size () - 1);
./vala/valaintegerliteral.vala:            number = number.ndup 
(number.size () - 1);
./vala/valagenieparser.vala:        return ((string) 
tokens[last_index].begin.pos).ndup ((tokens[last_index].end.pos - 
tokens[last_index].begin.pos));
./vala/valagenieparser.vala:                                var st =  
s_exp.value.ndup (len-1);
./vala/valascanner.vala:            push_comment (((string) begin).ndup 
((long) (current - begin)), line == 1);
./vala/valascanner.vala:            push_comment (((string) begin).ndup 
((long) (current - begin)), begin_line == 1);
./vapigen/valagidlparser.vala:        string metadata_filename = 
"%s.metadata".printf (source_file.filename.ndup 
(source_file.filename.size () - ".gi".size ()));
./vapigen/valagidlparser.vala:                    common_prefix = 
common_prefix.ndup (common_prefix.size () - 1);
./vapigen/valagidlparser.vala:                    common_prefix = 
common_prefix.ndup (common_prefix.size () - 1);
./vapigen/valagidlparser.vala:                common_prefix = 
common_prefix.ndup (common_prefix.size () - 1);
./vapigen/valagidlparser.vala:        return s.offset (1).ndup (s.size 
() - 2);



glib not have g_utf8_strndup(), but have g_utf8_strncpy()

We must wrapped this function.

1) Create own  separate library for 3 lines C-code only? Develop, create 
projects, maintain, build rpms and srpms for various distros and arch)?

2) Create C-file and include via extern in all own vala projects?


> > BTW: I found a way to kill the vast number static wrappers in DBus
> > dynamic methods. File a new bug?
> >     
>
> Sure.
>
> Cheers,
> Jürg
>
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