Re: [nft PATCH RFC] libnftables: Implement JSON output support

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On Wed, Jan 17, 2018 at 07:45:04PM +0100, Pablo Neira Ayuso wrote:
[...]
> > On Wed, Jan 17, 2018 at 01:50:26PM +0100, Pablo Neira Ayuso wrote:
> > > On Wed, Jan 17, 2018 at 01:44:06PM +0100, Pablo Neira Ayuso wrote:
> > > > On Wed, Jan 17, 2018 at 12:51:40PM +0100, Phil Sutter wrote:
> > > [...]
> > > > 
> > > > > * There is quite some code-duplication involved given that this
> > > > >   introduces an alternative function for almost any function in the
> > > > >   affected code path.
> > > > 
> > > > You mean, a new callback for each expr/datatype? We should not expose
> > > > bitwise/byteorder and such, it's too low level.
> > > 
> > > I'd rather see you map the abstract syntax tree that is represented
> > > through parser_bison.y to your json representation. I think this patch
> > > is mapping the tree that we obtain after the evaluation phase, which
> > > comes with low level expressions such as bitwise/byteorder.
> > 
> > I don't get your point here, either: Not sure what this has to do with
> > parser_bison.y - my patch handles output only for now, I didn't bother
> > with input yet. Or am I on the completely wrong track now?
> 
> Sorry, I was refering about the input support.

Ah, I see. For input, I did consider using bison BTW, but doubt it will
lead to less code than implementing everything with libjansson. And yes,
this will then be on the same level as parser_bison.y, so what is parsed
will then be fed to cmd_evaluate().

Cheers, Phil
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