linux-kernel - Re: [PATCH] kernel-doc: handle spaces in array size

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Date:	Fri, 6 Apr 2007 21:24:48 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Randy Dunlap <randy.dunlap@...cle.com>
cc:	lkml <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH] kernel-doc: handle spaces in array size


On Apr 6 2007 11:47, Randy Dunlap wrote:
>
>Unfortunately, kernel-doc has problems with a struct field like this:
>	uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
>
>simply due to the spaces around the "+" sign, so drop all spaces inside
>[...] so that parsing is done correctly (in some sense).
>
>@@ -1452,6 +1452,12 @@ sub create_parameterlist($$$) {
> 	    $arg =~ s/\s*:\s*/:/g;
> 	    $arg =~ s/\s*\[/\[/g;
> 
>+	    # no spaces inside [array size expression];
>+	    # messes up split/pop/shift/unshift below;
>+	    while ($arg =~ m/\[.*\s.*\]/) {
>+		$arg =~ s/\[(.*)\s(.*)\]/\[$1$2\]/;
>+	    }
>+
> 	    my @args = split('\s*,\s*', $arg);
> 	    if ($args[0] =~ m/\*/) {
> 		$args[0] =~ s/(\*+)\s*/ $1/;

	while($arg =~ s/\[(.*)\s+(.*)\]/[$1$2]/) {
	}

should do it, and saves us the pre-matching. (Also note the + at \s)
(No need to escape [ and ] in the target pattern.)

I can also offer this gem which should do it the most saving way by
matching the inside of [] exactly once, and otherwise
matching/replacing only on \s:

	$arg =~ s{\[(.*)\]}{($_=$1)=~s/\s+//g;"[$_]"}e;

(I already hear everyone screaming... ;-)


Jan
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