linux-kernel - Re: sscanf: implement basic character sets

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Message-ID: <20160307231220.GC12689@packer-debian-8-amd64.digitalocean.com>
Date:	Mon, 7 Mar 2016 18:12:20 -0500
From:	Jessica Yu <jeyu@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org
Subject: Re: sscanf: implement basic character sets

+++ Jessica Yu [26/02/16 15:28 -0500]:
>+++ Jessica Yu [26/02/16 15:20 -0500]:
>>Implement basic character sets for the '%[' conversion specifier.
>>
>>The '%[' conversion specifier matches a nonempty sequence of characters
>>from the specified set of accepted (or with '^', rejected) characters
>>between the brackets. The substring matched is to be made up of characters
>>in (or not in) the set. This is useful for matching substrings that are
>>delimited by something other than spaces.
>>
>>This implementation differs from its glibc counterpart in the following ways:
>>(1) No support for character ranges (e.g., 'a-z' or '0-9')
>>(2) The hyphen '-' is not a special character
>>(3) The closing bracket ']' cannot be matched
>>(4) No support (yet) for discarding matching input ('%*[')
>>
>>Signed-off-by: Jessica Yu <jeyu@...hat.com>
>
>Since this version is largely based on Rasmus' sample bitmap code
>(with only very minor tweaks), what is the best way to provide
>attribution in this case? A Suggested-by: tag or another
>Signed-off-by: tag (since actual code is involved)?

Andrew, friendly ping on this patch and question? :-)

Thanks,
Jessica