#!/usr/bin/ruby

# Copyright (C) 2004 Iowa State University

# This file is part of JML

# JML is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# JML is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with JML; see the file COPYING.  If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

(STDERR.puts "usage: fix-copyright.rb yyyy filename..."; exit 1) if ARGV.size < 2

Copyright2Dig =  /(Copyright.*)(\d\d\d\d)[^0-9]*(\d\d)([^0-9].*Iowa State University)/
CopyrightRE = /(Copyright.*)(\d\d\d\d)(.*Iowa State University)/

# RegExp that matches a CVS Id entry for a file that has been updated in
# the given year:
Updated = "\\$(Id|Date).*\\b" + ARGV[0] + "\\/\\d\\d\\/\\d\\d.*\\$"
def updated(lines)
  lines.each do |l|
    return true if l =~ Updated
  end
  false
end


ARGV[1,ARGV.length-1].each do |a|
  f = File.open a
  contents = f.readlines
  f.close
  if updated(contents)
    output = File.new(a,"w")
    contents.each do |l|
      if (not Copyright2Dig =~ l and CopyrightRE =~ l) 
	l2 = $` + $1 + ARGV[0] + $3 + $'
        output.puts l2
	puts "Updated " + a if not l == l2
      else
        output.puts l
      end
    end
    output.close
  end
end