#!/usr/bin/perl
# 
# Copyright © 2015-2025 by Vincent Slyngstad
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS LISTED ABOVE BE LIABLE
# FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
# CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# 
# Except as contained in this notice, the names of the authors above
# shall not be used in advertising or otherwise to promote the sale, use
# or other dealings in this Software without prior written authorization
# from those authors.

#
# Repair line endings. PDP-8 text files should end in CR-LF.
#

foreach $f (@ARGV) {
  open(INPUT, $f) || die "$f: $!";
  $txt = "";
  $ok = 1;
  while (<INPUT>) {
    if (s/\r(.)/^M\1/g) {
      warn "$f: $_";
      $ok = 0;
    } elsif (s/\010/^H/g) {
      warn "$f: $_";
      $ok = 0;
    } elsif (!/\r$/) {
      warn "$f: $_" if $ok;
      s/$/\r/;
      $ok = 0;
    }
    $txt .= $_;
  }
  next if $ok;
  die "$f.new: exists" if -f "$f.new";
  open(OUTPUT, ">$f.new") || die "$f.new: $!";
  warn "writing $f.new\n" if -f "$f.new";
  print OUTPUT $txt;
}