From e4ef2cb4fff5ee825b00deaafcdfc39447d6adfe Mon Sep 17 00:00:00 2001
From: Sandro Cazzaniga <kharec@mageia.org>
Date: Tue, 25 Sep 2012 09:53:36 +0000
Subject: tidying the code

---
 pm/MGATools/iso.pm | 87 ++++++++++++++++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 36 deletions(-)

diff --git a/pm/MGATools/iso.pm b/pm/MGATools/iso.pm
index 8fe13e5..24d91b4 100644
--- a/pm/MGATools/iso.pm
+++ b/pm/MGATools/iso.pm
@@ -5,12 +5,12 @@ use Digest::MD5;
 
 require Exporter;
 use URPM;
-our @ISA = qw(Exporter);;
+our @ISA    = qw(Exporter);
 our @EXPORT = qw(include_md5);
-our ($INFO_OFFSET, $SIZE_OFFSET, $SKIP);
+our ( $INFO_OFFSET, $SIZE_OFFSET, $SKIP );
 $INFO_OFFSET = 883;
 $SIZE_OFFSET = 84;
-$SKIP = 15;
+$SKIP        = 15;
 
 =head1 NAME
 
@@ -52,37 +52,51 @@ md5 code highly inspired from Redhat anaconda md5 in ISO code
 
 =cut
 
-
 # function copied from Mkcd::Tools
 # TODO must add some check of maximum authorized size
 sub include_md5 {
-    my ($iso, $write, $verbose) = @_;
-    my $ISO; 
+    my ( $iso, $write, $verbose ) = @_;
+    my $ISO;
     if ($write) {
-	open $ISO, "+<$iso" or return "ERROR include_md5: unable to open $iso ($!)\n";	
-    } else {
-	open $ISO, $iso or return "ERROR include_md5: unable to open $iso ($!)\n";	
+        open $ISO, "+<$iso"
+          or return "ERROR include_md5: unable to open $iso ($!)\n";
+    }
+    else {
+        open $ISO, $iso
+          or return "ERROR include_md5: unable to open $iso ($!)\n";
     }
     binmode $ISO;
-    my $offset = 16*2048;
+    my $offset = 16 * 2048;
+
     # blank header
     seek $ISO, $offset, 0;
-    my ($buf, $msg);
+    my ( $buf, $msg );
     while (1) {
-	read $ISO,$buf,2048;
-	my $c = ord $buf;
-	last if $c == 1;
-	return "ERROR include_md5: could not find primary volume descriptor\n" if $c == 255;
-	$offset += 2048
+        read $ISO, $buf, 2048;
+        my $c = ord $buf;
+        last if $c == 1;
+        return "ERROR include_md5: could not find primary volume descriptor\n"
+          if $c == 255;
+        $offset += 2048;
     }
-    my $size = ((ord substr $buf, $SIZE_OFFSET, 1) * 0x1000000 + 
-                (ord substr $buf, $SIZE_OFFSET + 1, 1) * 0x10000 + 
-		(ord substr $buf, $SIZE_OFFSET + 2, 1) * 0x100 + 
-		(ord substr $buf, $SIZE_OFFSET + 3, 1)) * 2048;
-    my ($system, $volume, $publisher, $prep, $app) = map { $a = $_ ; $a =~ s/^\s*//; $a =~ s/\s*$//; $a } (substr($buf, 8, 22), substr($buf, 30, 40), substr($buf, 318, 128), substr($buf, 446, 32), substr($buf, 574, 128)); 
-    print "include_md5:\nSystem: \t$system\nVolume: \t$volume\nPublisher: \t$publisher\nData preparer: \t$prep\nApplication: \t$app\nISO size: \t$size\n" if $verbose;
+    my $size =
+      ( ( ord substr $buf, $SIZE_OFFSET, 1 ) * 0x1000000 +
+          ( ord substr $buf, $SIZE_OFFSET + 1, 1 ) * 0x10000 +
+          ( ord substr $buf, $SIZE_OFFSET + 2, 1 ) * 0x100 +
+          ( ord substr $buf, $SIZE_OFFSET + 3, 1 ) ) * 2048;
+    my ( $system, $volume, $publisher, $prep, $app ) =
+      map { $a = $_; $a =~ s/^\s*//; $a =~ s/\s*$//; $a } (
+        substr( $buf, 8,   22 ),
+        substr( $buf, 30,  40 ),
+        substr( $buf, 318, 128 ),
+        substr( $buf, 446, 32 ),
+        substr( $buf, 574, 128 )
+      );
+    print
+"include_md5:\nSystem: \t$system\nVolume: \t$volume\nPublisher: \t$publisher\nData preparer: \t$prep\nApplication: \t$app\nISO size: \t$size\n"
+      if $verbose;
     seek $ISO, $offset + $INFO_OFFSET, 0;
-    read $ISO, $buf,512;
+    read $ISO, $buf, 512;
     my ($md5sum) = $buf =~ /.md5 = (\S+)/;
     $msg .= "include_md5: previous data $buf\n";
     seek $ISO, 0, 0;
@@ -91,33 +105,34 @@ sub include_md5 {
     $md5->add($buf);
     seek $ISO, 512, 1;
     $read += 512;
-    $|=1;
-    my $val = int $size/2048/100;
+    $| = 1;
+    my $val = int $size / 2048 / 100;
     $verbose and print "\rReading: 0 %";
-    my ($i, $j);
-    # skip last $SKIP bytes that sometimes are not correctly burned by some drives
+    my ( $i, $j );
+
+  # skip last $SKIP bytes that sometimes are not correctly burned by some drives
     my $n = 1;
-    while ($n && $read < $size - $SKIP * 2048) {
-	$n = read $ISO, $buf,2048;
-	print "\rReading: ", $j++, " %" if ($verbose && !($i++ % $val));
-	$md5->add($buf);
-	$read += $n;
+    while ( $n && $read < $size - $SKIP * 2048 ) {
+        $n = read $ISO, $buf, 2048;
+        print "\rReading: ", $j++, " %" if ( $verbose && !( $i++ % $val ) );
+        $md5->add($buf);
+        $read += $n;
     }
     print "\n";
     my $digest = $md5->hexdigest;
     $msg .= "include_md5: computed md5 $digest\n";
     my $res = $md5sum eq $digest;
     if ($md5sum) {
-	$msg .= "include_md5: previous md5 $md5sum\ninclude_md5: md5sum check ";
-	$msg .= $res ? "OK\n" : "FAILED\n"
+        $msg .= "include_md5: previous md5 $md5sum\ninclude_md5: md5sum check ";
+        $msg .= $res ? "OK\n" : "FAILED\n";
     }
     print $msg if $verbose;
     $write or return $res;
     seek $ISO, $offset + $INFO_OFFSET, 0;
     my $str = substr "$volume.md5 = $digest", 0, 512;
     my $l = length $str;
-    print $ISO ($l > 512 ? substr $str, -1, 512 : $str . ' ' x (512 - $l));
-    close $ISO
+    print $ISO ( $l > 512 ? substr $str, -1, 512 : $str . ' ' x ( 512 - $l ) );
+    close $ISO;
 }
 
 1
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