#!/usr/bin/perl
#
#*******************************************************************************
#
#Copyright (c) 2009, Perforce Software, Inc.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
# 1.  Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 
# 2.  Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL PERFORCE SOFTWARE, INC. BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#*******************************************************************************
#
#Author: Stephen Moon
#
#Date: August 6, 2010 
#Program: Lines add, deleted, and changed between two difference releases 
#
#*******************************************************************************

use warnings;
use strict;

sub main() {

my $argc = @ARGV;

if($argc != 2) { die "Usage: codeChange.pl <branch_one> <branch_two>\n"; }

my $p4 = "p4 -p public.perforce.com:1666 -u smoon";

open(OUT,">codeChange.txt") or die "Unable to open codeChange.txt\n";

my ($lineAddCt,$lineAddRange) = (0,0);
my ($lineDelCt,$lineDelRange) = (0,0);
my ($lineChgCt,$lineChgRange) = (0,0);
foreach(`$p4 diff2 $ARGV[0] $ARGV[1]`) {

#lines added
   if(/^\d+a\d+$/) {
      print OUT "NAN: $_";
      $lineAddCt++;
   }
   
   if(/^\d+a(\d+),(\d+)$/) {
      $lineAddRange = $2 - $1;
      $lineAddCt = $lineAddCt + $lineAddRange;
      print OUT "NANcN: $_";
   }
   
   #lines deleted
   if(/^\d+d\d+$/) {
      print OUT "NDN: $_";
      $lineDelCt++;
   }
   
   if(/^(\d+),(\d+)d\d+$/) {
      $lineDelRange = $2 - $1;
      $lineDelCt = $lineDelCt + $lineDelRange;
      print OUT "NcNDN: $_";
   }
   
   #lines changed
   if(/^\d+c\d+$/) {
      print OUT "NCN: $_";
      $lineChgCt++;
   }
   
   if(/^(\d+),(\d+)c\d+$/) {
      $lineChgRange = $2 - $1;
      $lineChgCt = $lineDelCt + $lineChgRange;
      print OUT "NcNCN: $_";
   }
   
   if(/^\d+c(\d+),(\d+)$/) {
      $lineChgRange = $2 - $1;
      $lineChgCt = $lineDelCt + $lineChgRange;
      print OUT "NCNcN: $_";
   }
   
   if(/^(\d+),(\d+)c(\d+),(\d+)$/) {
      $lineChgRange = ($4 - $3) - ($2 - $1);
      $lineChgCt = $lineDelCt + abs($lineChgRange);
      print OUT "NcNCNcN: $_";
   }

}#end of foreach loop


print "Lines added are: " . $lineAddCt . "\n";
print "Lines deleted are: " . $lineDelCt . "\n";
print "Lines changed are: " . $lineChgCt . "\n";

close(OUT);
}

&main();