#! /usr/bin/perl -w 
use strict;

=head1 Notices

Originally developed for Perforce by VIZIM (www.vizim.com)

Copyright (c) 2014 Perforce Software, Inc. and VIZIM Worldwide, Inc.
All rights reserved.

Please see LICENSE.txt in top-level folder of this distribution for
license information

=cut

use v5.14.0;   # Earliest version testing was performed against

my $APPNAME = 'ctrlList.pl';
my $APPWHAT = 'ctrl file item lister; version 1.03';
my $APPNOTICES = "Copyright (c) 2014 Perforce Software, Inc. and VIZIM Worldwide, Inc.
All rights reserved.
See LICENSE.txt for license information.";

=head1 ctrl file item lister

Tool to list items from a ctrl file.

Primary use is creating control files for import recovery.
Secondary uses include breaking a large control file into smaller units and
to isolate a single entry from a larger ctrl file for analysis.

By default, a TFSCONTROL header tag is copied to the output.
Copy of this tag can be suppressed with the -n option.

=cut

if( defined $ARGV[0] && (uc $ARGV[0] eq '-V') ) {
  print "$APPWHAT\n";
  exit(0);
}

if( ! defined $ARGV[0]
    || $ARGV[0] =~ m!^\-+[h\?]! ) {
  print "$APPWHAT
$APPNOTICES

Usage:

$APPNAME -V
$APPNAME [-h|-?]
$APPNAME [-n] CTRL first [last]

  -n - no listing of TFSCONTROL tag\n";
  exit( 0 );
}

my $listHeader = 1;
if( $ARGV[0] =~ m!^\-+[n]! ) {
  $listHeader = 0;
  shift @ARGV;
}

my $fileName = $ARGV[0];
die "ctrl file $fileName does not exist" unless -e $fileName;
shift @ARGV;

my $first = $ARGV[0];
shift @ARGV;

my $last = $first;
$last = $ARGV[0]
  if defined $ARGV[0];

my $hCtrl;
open $hCtrl, '<', $fileName or die "Can't open $fileName - $!";

my $list = 0;
while(<$hCtrl>) {
  if( m!^\<TFSCONTROL! && $listHeader ) {
    print $_;
  } elsif( m!^\<CC seq\=\"(\d+)\"! ) {
    last if $1 > $last;
    $list = $1 >= $first && $1 <= $last;
  }
  print $_ if $list;
  $list = 0
    if m!^\<CS !;
}
close $hCtrl;