Ethereal-dev: Re: [Ethereal-dev] Case insensitive header field dfilter?

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Tue, 14 Oct 2003 10:43:34 -0700
On Tue, Oct 14, 2003 at 10:48:32AM +0200, Biot Olivier wrote:
> I'd like to enable case-insensitive filtering for header fields. Basically,
> I have a header field which is either encoded in textual or in binary form.
> I would like to allow the user to filter based on the presence of a given
> header by typing something like:
> 	wsp.header.name == 'vary'
> where the expression should match 'Vary', 'vary' and 'vArY'. Defining the
> header as a FT_STRING[Z] only allows for case-sensitive filtering.
> 
> Is this possible already,

No.

> or should we define new FT_STRING[Z] type(s)? --> FT_STRING[Z]_I?

That would be one possiblity, but that'd prevent people from doing
case-sensitive filtering on those strings (which they might want to do
for some reason), and it wouldn't allow people to do case-*in*sensitive
filtering on FT_STRING[Z] fields.

The right thing to do there might be to have a new operator for doing
case-insensitive string comparison.