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freetds - RE: [freetds] some small patches...

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  • From: "Lowden, James K" <LowdenJK AT bernstein.com>
  • To: "'FreeTDS Development Group'" <freetds AT lists.ibiblio.org>
  • Subject: RE: [freetds] some small patches...
  • Date: Tue, 15 Apr 2003 10:40:46 -0400

> From: Thompson, Bill D (London) [mailto:ThompBil AT exchange.uk.ml.com]
> Sent: April 15, 2003 8:38 AM
>
> As I am about to go into production with freetds in the next
> few weeks, I
> don't want to take the latest snapshot with all the charset
> stuff

Good news, bad news, eh?

I'm applying these, but I have a couple of questions.

> + case SYBDATETIME:
> + memset(varaddr, '\0', 8);
> + break;

Fine.

> void
> dbexit()
...
Fine.

> void tds_free_context(TDSCONTEXT *context)
> {
> if (context && context->locale) {

tds_free_locale() returns immediately if its argument is NULL. No need to
check it here. IMO the rule should be that the tds_free* functions can be
passed null pointers harmlessly.

> tds_free_locale(context->locale);
> context->locale = NULL;
> }
> if (context)
> TDS_ZERO_FREE(context);
> }

Does "free(NULL)" cause a problem with your libraries? It's not supposed
to; you should be able to free a null pointer without penalty. If that *is*
a problem, we should change TDS_ZERO_FREE() to avoid it, add a note to our
CodingStyle or something, to let people (like me) know they can't rely on
it.

This could be simplified to:

void
tds_free_context(TDSCONTEXT *context)
{
tds_free_locale(context->locale);
TDS_ZERO_FREE(context);
}

Does that work for you?

> void tds_free_locale(TDSLOCALE *locale)
...
Already dealt with, per your prior message.

Regards,

--jkl


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