#!/usr/local/bin/perl -w
#
# Copyright (C) 1998, 1999, 2000  Internet Software Consortium.
# 
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
# 
# THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
# ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
# CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
# DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
# PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
# SOFTWARE.

%file_types = ();
%file_years = ();

open(COPYRIGHTS, "<util/copyrights") || die "can't open copyrights: $!";
while (<COPYRIGHTS>) {
    chomp;
    ($file, $type, $years) = split;
    $file_types{$file} = $type;
    $file_years{$file} = $years;
}
close(COPYRIGHTS);

($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time());
$year += 1900;

open(FILES, "<util/files") || die "can't open files: $!";
while (<FILES>) {
    chomp;
    if (!$file_types{$_}) {
	if ($_ =~ /\.[chy]$/) {
	    $file_types{$_} = "C";
	} elsif ($_ =~ /\/Makefile\.in$/) {
	    $file_types{$_} = "MAKE";
	} elsif ($_ =~ /\/\.cvsignore$/) {
	    $file_types{$_} = "X";
	} else {
	    $file_types{$_} = "?";
	}
        ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,
	 $blksize,$blocks)
	    = stat($_);
	($sec,$min,$hour,$mday,$mon,$c_year,$wday,$yday,$isdst) =
	    localtime($ctime);
	($sec,$min,$hour,$mday,$mon,$m_year,$wday,$yday,$isdst) =
	    localtime($mtime);
	$c_year += 1900;
	$m_year += 1900;
	if ($m_year != $year || $c_year != $year) {
	    print "$_: must set copyright year(s) manually\n";
	    $file_years{$_} = "????";
	} else {
	    $file_years{$_} = "$year";
	}
	# keep perl from issuing warnings about "used only once"
	$dev = $ino = $mode = $nlink = $uid = $gid = $rdev = $size = 0;
	$atime = $blksize = $blocks = 0;
    } else {
	if ($file_types{$_} eq "X" || $file_years{$_} eq "????") {
	    next;
	}
	@years = split(/,/, $file_years{$_});
	$has_current = 0;
	foreach $fyear (@years) {
	    if ($fyear == $year) {
		$has_current = 1;
	    }
	}
	if (!$has_current) {
	    ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,
	     $blksize,$blocks)
		= stat($_);
	    ($sec,$min,$hour,$mday,$mon,$m_year,$wday,$yday,$isdst) =
		localtime($mtime);
	    $m_year += 1900;
	    if ($m_year == $year) {
		$file_years{$_} .= ",$year";
	    }
	}
    }
}
close(FILES);

open(NEWCOPYRIGHTS, ">util/newcopyrights") ||
    die "can't open newcopyrights: $!";
foreach $file (sort(keys(%file_types))) {
    print NEWCOPYRIGHTS "$file";
    $len = length($file);
    if ($len >= 48) {
	$tabs = 1;
    } else {
	$needed = int (48 - $len);
	$tabs = int ($needed / 8);
	if ($needed % 8 != 0) {
	    $tabs++;
	}
    }
    for ($i = 0; $i < $tabs; $i++) {
	printf NEWCOPYRIGHTS "\t";
    }
    printf NEWCOPYRIGHTS "%s\t%s\n", $file_types{$file}, $file_years{$file};
}
close(NEWCOPYRIGHTS);