From: | Ludek Finstrle <luf(at)pzkagis(dot)cz> |
---|---|
To: | Hiroshi Inoue <inoue(at)tpf(dot)co(dot)jp> |
Cc: | pgsql-odbc(at)postgresql(dot)org |
Subject: | Re: Patch for snprintf problem (bug #1000650) 3-rd try |
Date: | 2006-06-09 12:13:23 |
Message-ID: | 20060609121323.GA17258@soptik.pzkagis.cz |
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Thread: | |
Lists: | pgsql-odbc |
> > > buf = "text";
> > > snprintf(buf,size,"%s append",buf);
> > >
> > > buf = "text append" on Windows (MS VC compiler)
> > > buf = " append" on linux (gcc compiler)
> > >
> > > I solve it this way (main idea):
> > > snprintf(buf + strlen(buf), " append");
> >
> > Hmm bad news.
> > If so, it may be better to use the sequence like the following for example.
> >
> > char *query_ptr;
> > size_t bufsize_res;
> > int slen;
> >
> > /* Initialize */
> > query_ptr = columns_query;
> > bufsize_res = sizeof(columns_query);
> >
> > if (..)
> > {
> > if ((slen = snprintf(query_ptr, bufsize_res, .., )) <= 0)
> > {
> > .. error_handling ..
> > }
> > query_ptr += slen;
> > bufsize_res -= slen;
> > }
> >
> > ...
>
> I'm not sure. There are a lot of strcat, my_strcat, schema_strcat calls
> between snprintf. There is only one place where snprintf could be called
> after another snprintf.
I change the snprintf_addlen to snprintf_len as you mentioned.
Third try of patch attached.
Comments are welcome
Luf
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