On Feb 10, 2004, at 1:05 PM, Olivier Biot wrote:
I am afraid that adding this to Ethereal today will require serious work and probably we'll need *ugh* global variables to implement this,
"This" meaning "make the Apply button active only if the filter is syntactically valid"?
BTW, note that the on-the-fly syntax checking we're now doing could cause problems if the expression you're constructing is, for example
ip.addr == {hostname}
as it will, I assume, try compiling the current expression for each character you type or other change you make, and that involves doing a host-name-to-address lookup, and that could be *really* slow if a name server isn't responding.
| You can tell whether a filter was empty by checking whether | "dfilter_compile()" supplied a non-null "dfilter_t" pointer - if the | pointer it supplied was null, the filter was empty.
You'll want to add a method gboolean dfilter_equal(dfilter_t **dfp_a, dfilter_t **dfp_b) to epan/dfilter.[ch] which would compare the byte code of both compiled display filters and return true if both programs are identical.
Yes. I think Ulf was questioning whether we'd want to do so *now*, as the intent is to produce the next release this week, I think.
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