Re: psql patch

On Thu, Mar 20, 2003 at 05:13:05PM -0500, Bruce Momjian wrote:
>
> I have applied the following patch to fix a bug in the new psql patch.
> It wasn't handling multi-line /* */ comments properly. Jeroen, would
> you review the change. The rest of the changes look very good.

Yes, come to think of it I can see now that it also wouldn't deal
with special sequences like '--' or unmatched quotes and parentheses
very well either. Nor did the original version, from the looks of
it, so I'd like to suggest moving the whole "if (in_xcomment)" clause
up a little in the else-if chain, to just below the "if (in_quote)"
one. That would make the thing ignore all special sequences except
'*/' when inside an xcomment, and all sequences inside a quote
(except a closing quote, of course). Plus, just in case any
legitimate expression could give rise to the sequence "*/" ouside
of an xcomment, that would also be handled properly.

BTW your version could be simplified a little:

/* [ "if (in_quote)" clause here ] */

/* end of extended comment? */
else if (in_xcomment)
{
if ((line[i] == '*') &&
(line[i + thislen] == '/') &&
!--in_xcomment)
ADVANCE_1;
}

/* start of extended comment? */
/* [ '/*' clause here ] */

Lessee... I hope this says it all, but if you like I can submit
a patch to today's CVS version.

Jeroen