linux-kernel - [PATCH 13/17] checkpatch: suspect indent -- skip over preprocessor, label and blank lines

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Date:	Mon, 11 Aug 2008 21:13:08 +0100
From:	Andy Whitcroft <apw@...dowen.org>
To:	Andrew Morton <akpm@...l.org>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	Joel Schopp <jschopp@...tin.ibm.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Andy Whitcroft <apw@...dowen.org>
Subject: [PATCH 13/17] checkpatch: suspect indent -- skip over preprocessor, label and blank lines

We should skip over and check the lines which follow preprocessor
statements, labels, and blank lines.  These all have legitimate reasons
to be indented differently.

Signed-off-by: Andy Whitcroft <apw@...dowen.org>
---
 scripts/checkpatch.pl |   27 ++++++++++++++++-----------
 1 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e3ae79a..6ddae89 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1434,7 +1434,7 @@ sub process {
 			if ($s =~ s/^\s*\\//) {
 				$continuation = 1;
 			}
-			if ($s =~ s/^\s*\n//) {
+			if ($s =~ s/^\s*?\n//) {
 				$check = 1;
 				$cond_lines++;
 			}
@@ -1446,15 +1446,20 @@ sub process {
 				$check = 0;
 			}
 
-			# Ignore the current line if its is a preprocessor
-			# line.
-			if ($s =~ /^\s*#\s*/) {
-				$check = 0;
-			}
+			my $cond_ptr = -1;
+			while ($cond_ptr != $cond_lines) {
+				$cond_ptr = $cond_lines;
 
-			# Ignore the current line if it is label.
-			if ($s =~ /^\s*$Ident\s*:/) {
-				$check = 0;
+				# Ignore:
+				#  1) blank lines, they should be at 0,
+				#  2) preprocessor lines, and
+				#  3) labels.
+				if ($s =~ /^\s*?\n/ ||
+				    $s =~ /^\s*#\s*?/ ||
+				    $s =~ /^\s*$Ident\s*:/) {
+					$s =~ s/^.*?\n//;
+					$cond_lines++;
+				}
 			}
 
 			my (undef, $sindent) = line_stats("+" . $s);
@@ -1470,7 +1475,7 @@ sub process {
 				$stat_real = "[...]\n$stat_real";
 			}
 
-			##print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
+			#print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
 
 			if ($check && (($sindent % 8) != 0 ||
 			    ($sindent <= $indent && $s ne ''))) {
-- 
1.6.0.rc1.258.g80295

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