Re: Patch for snprintf problem (bug #1000650)

> > 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.
BTW it's something what snprintf_addlen is doing. Or am I miss something?

I do the patch with minimal changes in mind. In my opinion strcat
may be faster in joining more char *.

Regards,

Luf