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authorAndy Whitcroft <apw@canonical.com>2009-01-07 01:41:27 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 02:59:17 +0300
commit4635f4fbaf51555509c747eed02a7e7a580ae1e1 (patch)
treed3d9d3d26b1c7d302c1200110c5d51b5340183f6 /scripts/checkpatch.pl
parent8b1b33786b06a222cf3430b1bf942a3681532104 (diff)
downloadlinux-4635f4fbaf51555509c747eed02a7e7a580ae1e1.tar.xz
checkpatch: track #ifdef/#else/#endif when tracking blocks
When picking up a complete statement or block for analysis we cannot simply track open/close/etc parenthesis we must take into account preprocessor section boundaries. Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/checkpatch.pl')
-rwxr-xr-xscripts/checkpatch.pl22
1 files changed, 22 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 67b0c9faa32d..906624c0e9e6 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -405,6 +405,7 @@ sub ctx_statement_block {
my $type = '';
my $level = 0;
+ my @stack = ([$type, $level]);
my $p;
my $c;
my $len = 0;
@@ -436,6 +437,16 @@ sub ctx_statement_block {
$remainder = substr($blk, $off);
#warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
+
+ # Handle nested #if/#else.
+ if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
+ push(@stack, [ $type, $level ]);
+ } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
+ ($type, $level) = @{$stack[$#stack - 1]};
+ } elsif ($remainder =~ /^#\s*endif\b/) {
+ ($type, $level) = @{pop(@stack)};
+ }
+
# Statement ends at the ';' or a close '}' at the
# outermost level.
if ($level == 0 && $c eq ';') {
@@ -582,11 +593,22 @@ sub ctx_block_get {
my @res = ();
my $level = 0;
+ my @stack = ($level);
for ($line = $start; $remain > 0; $line++) {
next if ($rawlines[$line] =~ /^-/);
$remain--;
$blk .= $rawlines[$line];
+
+ # Handle nested #if/#else.
+ if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
+ push(@stack, $level);
+ } elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
+ $level = $stack[$#stack - 1];
+ } elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
+ $level = pop(@stack);
+ }
+
foreach my $c (split(//, $rawlines[$line])) {
##print "C<$c>L<$level><$open$close>O<$off>\n";
if ($off > 0) {