#!/usr/bin/perl
# 
# Copyright © 2015-2020 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.

#
# Convert a text version of a .BN file into a -pb.od file

# Basically, it's just a "text" file with the standard
# 3 bytes in 2 words format.

@todo = @ARGV;
foreach $f (@todo) {
  $of = $f; $of =~ y/A-Z/a-z/;
  $of =~ s/\.htm$//;
  $of =~ s/-bn$/-pb.od/;
  if (-f $of) {
    warn "Skipping $of: exists\n";
    next;
  }
  open(OUTPUT, ">$of") || die "$of: $!";
  print "Writing $of\n";
  open(INPUT, $f) || die "$f: $!";
  $eof = 0;
  while (<INPUT>) {
    # The lines we care about have an octal offset, colon, then 16 values.
    if (s/^(\d+): //) {
      # Pick up the words, two at a time.
      while (s/^(\d+)\s+(\d+)\s+//) {
        @w = (oct($1), oct($2)); 
        push(@w, (($w[0]&07400)>>4) + ($w[1]>>8));
        $w[0] &= 0377;
        $w[1] &= 0377;
        # Now output 3 bytes, or until \0232 is found.
        $eof = 1 if $w[0] == 0232;
        printf OUTPUT "%04o\n", $w[0] unless $eof;
        $eof = 1 if $w[1] == 0232;
        printf OUTPUT "%04o\n", $w[1] unless $eof;
        $eof = 1 if $w[2] == 0232;
        printf OUTPUT "%04o\n", $w[2] unless $eof;
      }
    }
  }
  close(OUTPUT) || die "$of: $!";
}
exit 0;