isort: Comment and improve code

1 files changed, 16 insertions, 3 deletions

diff --git a/isort b/isort
index 27a589d..af7828e 100755
--- a/isort
+++ b/isort
@@ -2,7 +2,20 @@
 
 # isort -- sort C variable declarations separated by commas
 
-s/([^,]*?)(\S+[,;])/$2/; $prefix = $1;
-s/;$/,/; @words = sort split /\s+/;
+# Extract words, save prefix.
+s/([^,]*?)(\S+[,;])/$2/;
+$prefix = $1;
+
+# Ensure all words end with comma.
+$semicolon = s/;$/,/;
+
+# Sort words.
+@words = sort {
+	($x = $a) =~ s/^\*//;
+	($y = $b) =~ s/^\*//;
+	$x cmp $y
+} split /\s+/;
+
+# Join words, add prefix and semicolon.
 $_ = $prefix . (join ' ', @words) . "\n";
-s/,$/;/;
+s/,$/;/ if $semicolon;