X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=opening-stats.pl;h=def0f8f67fb40626b1928f0e6ff189ee25366974;hb=74f1261e4067cbc1b743b329ed2d419aee735cbf;hp=1c17f50af253431e7baeb3e38163a5ed20bbc15a;hpb=2a322a4ad576d87535ce8a479f7a516da9457e80;p=remoteglot-book

diff --git a/opening-stats.pl b/opening-stats.pl
index 1c17f50..def0f8f 100755
--- a/opening-stats.pl
+++ b/opening-stats.pl
@@ -5,10 +5,33 @@ use CGI;
 use JSON::XS;
 use lib '..';
 use Position;
+use IPC::Open2;
 
 my $cgi = CGI->new;
 my $fen = $ARGV[0];
+my $filter_prev_pos_hash = $ARGV[1] // 0;
+my ($chld_out, $chld_in);
+my $pid = IPC::Open2::open2($chld_out, $chld_in, "./binlookup", "./open.mtbl", "40");
+
+# Root position.
 my $pos = Position->from_fen($fen);
-my $hex = unpack('H*', $pos->bitpacked_fen);
-system("./binlookup", "./open.mtbl", "40", $hex);
+my $bpfen_hex = unpack('H*', $pos->bitpacked_fen);
+my $prev_pos_hash_hex = unpack('H*', pack('S', $filter_prev_pos_hash));
+print $chld_in $bpfen_hex, "\n", $prev_pos_hash_hex, "\n";
+
+chomp (my $line = <$chld_out>);  # Root position hash.
+print $line, "\n";
+
+chomp ($line = <$chld_out>);  # Actual stats.
+print $line, "\n";
+my ($white, $draw, $black, $computer, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo, $timestamp, $pgn_file_number, $pgn_start_position, @moves) = split / /, $line;
 
+# Explore one move out.
+for my $move (@moves) {
+	my ($np, $uci_move) = $pos->make_pretty_move($move);
+	my $hex = unpack('H*', $np->bitpacked_fen);
+	print $chld_in $hex, "\n\n";
+	my $line = <$chld_out>;  # Ignore position hash.
+	$line = <$chld_out>;
+	print "$move $line";
+}