[Qemu-devel] Re: [PATCH 2/6] json-lexer: Handle missing escapes

[Anthony Liguori]

On 05/20/2010 10:16 AM, Paolo Bonzini wrote:
> On 05/20/2010 03:44 PM, Luiz Capitulino wrote:
> >   I think there's another issue in the handling of strings.
> >
> >   The spec says that valid unescaped chars are in the following range:
> >
> >      unescaped = %x20-21 / %x23-5B / %x5D-10FFFF

That's a spec bug IMHO.  Tab is %x09.  Surely you can include tabs in 
strings.  Any parser that didn't accept that would be broken.

> >   But we do:
> >
> >      [IN_DQ_STRING] = {
> >          [1 ... 0xFF] = IN_DQ_STRING,
> >          ['\\'] = IN_DQ_STRING_ESCAPE,
> >          ['"'] = IN_DONE_STRING,
> >      },
> >
> >   Shouldn't we cover 0x20 .. 0xFF instead?
>
> If it's the lexer, isn't just it being liberal in what it accepts?

I believe the parser correctly rejects invalid UTF-8 sequences.

Regards,

Anthony Liguori

> paolo