Re: Patch for snprintf problem (bug #1000650) 3-rd try

> > > 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