🚀 go-pugleaf

In article <4kr74a$k8o@solutions.solon.com>,
Sean 'Captain Napalm' Conner <spc@gate.net> wrote:
>>%# would be a poor choice; the conversion func for %# is one which returns
>>a magic cookie to set the alternate format flag.  :)

>  Oh.  Ah.  Well.  What IS available?

Whatever you want; it's just that if you change %#, you change the behavior
of existing legal programs.

>  Well, why not change the approach?  The current printf() will accept a
>line such as:

>		printf("%*s",someint,somestring);

>  To allow variable widths to be specified.  Why not extend that and pass in
>the function pointers?  Something like:

>		printf("%p@",myfunctptr,myptrtype);

>  Where '@' specifies a format function, and the letter before it declares
>the type using a single letter specification:

>		c	- char
>		s	- short
>		i	- int
>		l	- long
>		f	- float
>		d	- double

>  With the following modifiers:

>		p	- pointer (if alone, void *)
>		u	- unsigned

>  Less chance of clashes, and more flexible I feel.

Well, that would break existing code, of course; you can actually
do something similar;
	int funcconv(va_list *ap, char *into, int len, fmtspec *fs) {
		fmtconv fc;

		fc = va_arg(*ap, fmtconv);
		return fc(ap, into, len, fs);
	}

And just bind this to whatever character you want.  (In my sample
implementation, it's %<.)

-s
-- 
Peter Seebach - seebs@solon.com - Copyright 1996 Peter Seebach.
C/Unix wizard -- C/Unix questions? Send mail for help.  No, really!
FUCK the communications decency act.  Goddamned government.  [literally.]
The *other* C FAQ - http://www.solon.com/~seebs/c/c-iaq.html