In our compilers, varargs functions use "normal" promotion and
non-varargs functions use "best fit". Of course, leaving out a prototype
is bad.

-Rich

On Wed, 09 Feb 2000, Michael Richardson wrote:
>>>>>> "Paul" == Paul Sander <paul@wakawaka.com> writes:
>    Paul> The %m$nd format has to do with the XPG4 standard, as defined by The Open
>    Paul> Group (formerly X/Open and OSF, I believe).  It allows the rearrangement of
>    Paul> the arguments with regard to localization.
>
>  My understanding is that this only works if you can guarantee that all
>arguments are of the same size, which is not the case in ANSI C anymore since 
>you don't have to do default promotion rules.
>  I wonder how they get it to work?
>
>
>    Paul> An example of this usage would be localizing the display of a date.  To
>    Paul> show a date in American format, you could use something like this:
>
>    Paul>  sprintf( c_datestring, "%2$02d/%1$02d/%3$04d",
>    Paul> 	(int)tmdate.tm_mday, (int)tmdate.tm_mon+1,
>    Paul> 	(int)tmdate.tm_year+1900 );
>
>    Paul> But the European format reverses the month and day, like this:
>
>    Paul>  sprintf( c_datestring, "%1$02d/%2$02d/%3$04d",
>    Paul> 	(int)tmdate.tm_mday, (int)tmdate.tm_mon+1,
>    Paul> 	(int)tmdate.tm_year+1900 );
>
>    Paul> The value of this becomes apparent when the format string itself is
>    Paul> read from a message catalog.
>
>    Paul> You can find details on www.opengroup.org and searching for sprintf in
>    Paul> "The Single Unix Specification" (which you must hunt for, and register
>    Paul> to read for free).
>
>    Paul> --- Forwarded mail from wulf@ping.net.au
>
>    Paul> does anyone know the following construct? It was found in anteater
>    Paul> which segfaults at that point.
>
>    Paul> [...]
>    Paul>  sprintf( c_datestring, "year %1$02d, day %2$02d, month %3$04d",
>    Paul> 	(int)tmdate.tm_mday, (int)tmdate.tm_mon+1,
>    Paul> 	(int)tmdate.tm_year+1900 );
>    Paul>   string newdate = c_datestring;
>    Paul>   return newdate;
>
>    Paul> I've expanded the format string which is constructed earlier
>    Paul> in the code. I've never seen the use of a "%1$02d" format string nor have I
>    Paul> found any references in books and manuals. When changed to 
>    Paul> "%02d" the program runs fine and displays the correct date format.
>
>    Paul> Is there a new stdlib with extentions of the current format string? I am 
>    Paul> using egcs-1.1.1 and standard libraries as shipped with NetBSD-1.4.1.
>
>    Paul> --- End of forwarded message from wulf@ping.net.au
--
Richard Pennington		Introl Corporation, Milwaukee, WI USA
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