tools/sgf2gtp.pl

   1 #!/usr/bin/perl -l
   2 # This is a naive Perl script that will convert SGF files to GTP
   3 # format so that you can feed them to Pachi, insert genmove at
   4 # the right places etc. Might not work on obscure SGF files,
   5 # and of course there must be no variations.
   6 #
   7 # When called with a filename argument, it will create the output
   8 # file with .gtp extension instead of .sgf.
   9
  10 use warnings;
  11
  12 if ($ARGV[0]) {
  13         open STDIN, "$ARGV[0]" or die "$ARGV[0]: $!";
  14         my $ofile = $ARGV[0]; $ofile =~ s/sgf$//i; $ofile .= 'gtp';
  15         open STDOUT, ">$ofile" or die "$ofile: $!";
  16 }
  17
  18 local $/ = undef; my $sgf = <>;
  19 my $size = ($sgf =~ /SZ\[(\d+)\]/)[0];
  20 $size ||= 19;
  21 $sgf =~ s/\bC\[.*?\]//gs; # no comments
  22 #$sgf =~ s/\).*//gs; # cut at end of principal branch
  23
  24 print "boardsize " . $size;
  25 print "clear_board";
  26 if ($sgf =~ s/\bKM\[([\d.]+)\]//gs) {
  27         print "komi $1";
  28 }
  29 if ($sgf =~ s/\bHA\[(\d+)\]//gs and $1 > 0) {
  30         print "fixed_handicap $1";
  31 }
  32
  33 my $abcd = "abcdefghijklmnopqrstuvwxyz";
  34
  35 my @m = split /;/, $sgf;
  36 foreach (@m) {
  37         /^([BW])\[\]/ and print "play $1 pass";
  38         /^([BW])\[(\w\w)\]/ or next;
  39         my ($color, $coord) = ($1, $2);
  40         my ($x, $y) = split //, $coord;
  41         ($x ge 'i') and $x++;
  42         $y = $size - index($abcd, $y);
  43         print "play $color $x$y";
  44 }