[antlr-interest] Re: Binary files with byte counts

ericch2003 eric.chastan at netcelo.com
Mon Nov 25 04:23:50 PST 2002


Hello,

I have the same problem, did you find that predicates are the better
way to manage it ?
Can someone explain me how to use the predicates in this case ?


Thanks in advance .

Eric.



--- In antlr-interest at y..., Jonathan Sergent <sergent at xxx.xxx.xxxx wrote:
> /// Doug Erickson <doug.erickson at P...>:
>  ] If I understand your question correctly, the following solution
is one
>  ] way to do it.  I have a file format that has chunks of variable
length
>  ] of unparsed binary data embedded in parsed text.  In the lexer, I
create
>  ] special tokens that hold the binary data, and syntactic predicates to
>  ] count the bytes as I add it to the buffer.  Maybe it's hunky, but it
>  ] works, so it looks pretty good to me.
> 
> Oops.  Yeah.  I didn't think about semantic predicates inside loops
> to terminate them.  But this seems like what I want.  I'll fiddle with
> it some.
> 
> If other people have ideas, send to me, and I will summarize to the
> list (along with whatever sort of solution I find).
> 
> Thanks.
> 
> 
> -- 
> Jonathan Sergent / sergent at E... / (650) 786-3952


 

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