linux-kernel - Re: [PATCH 1/3] add binary printf

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Message-ID: <20090226185635.GA12895@elte.hu>
Date:	Thu, 26 Feb 2009 19:56:35 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 1/3] add binary printf


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> Instead of calling the in/out helper from the decoder, why not 
> calling the decoder from these three functions and let them 
> take the appropriate actions for each decoded format token?
> 
> Naive example:
> 
> bstr_printf() {
> 	while (decode_format(...))
> 		if (type == number)
> 			read_number_from_buf()
> 			str = number(....)
> 		....
> }
> 
> vsnprintf {
> 	while (decode_format(...))
> 		if (type == number)
> 			var_arg(...)
> 			str = number(....)
> 		....
> }
> 
> vbin_printf {
> 	while (decode_format(...))
> 		if (type == number)
> 			var_arg(...)
> 			write_number_to_buffer()
> 		...
> }
> 
> And the standard in/out pieces can be invoked through helpers.

ok, that looks rather clean too. And maybe vsnprintf() and 
bstr_printf() could be further unified?

I guess it depends on how it all looks like in the end. Only one 
way to find out ...

	Ingo
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