X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=Position.pm;h=272cadb78d2124275556e16df5bc7403b19cbe6d;hp=807b0035876e3a261dae1f2e0097c371d7160953;hb=65aa4e3d31851a0b504f55ec9907b4fe4f9f8966;hpb=d40118a8adcb0da790ab1087296287e7eeab7c2c;ds=sidebyside

diff --git a/Position.pm b/Position.pm
index 807b003..272cadb 100644
--- a/Position.pm
+++ b/Position.pm
@@ -97,6 +97,35 @@ sub fen {
 	return $fen;
 }
 
+# Returns a compact bit string describing the same data as fen(),
+# except for the half-move and full-move clock.
+sub bitpacked_fen {
+	my $pos = shift;
+	my $board = $pos->{'board'}->bitpacked_fen();
+
+	my $bits = "";
+	if ($pos->{'toplay'} eq 'W') {
+		$bits .= "0";
+	} else {
+		$bits .= "1";
+	}
+
+	$bits .= $pos->{'white_castle_k'};
+	$bits .= $pos->{'white_castle_q'};
+	$bits .= $pos->{'black_castle_k'};
+	$bits .= $pos->{'black_castle_q'};
+
+	my $col = $pos->{'ep_file_num'};
+	if ($col == -1) {
+		$bits .= "0";
+	} else {
+		$bits .= "1";
+		$bits .= (qw(000 001 010 011 100 101 110 111))[$col];
+	}
+
+	return $board . pack('b*', $bits);
+}
+
 sub to_json_hash {
 	my $pos = shift;
 	my $json = { %$pos, fen => $pos->fen() };
@@ -128,7 +157,7 @@ sub num_pieces {
 
 # Returns a new Position object.
 sub make_move {
-        my ($pos, $from_row, $from_col, $to_row, $to_col, $promo) = @_;
+        my ($pos, $from_row, $from_col, $to_row, $to_col, $promo, $pretty_move) = @_;
 
 	my $from_square = _pos_to_square($from_row, $from_col);
 	my $to_square = _pos_to_square($to_row, $to_col);
@@ -182,8 +211,12 @@ sub make_move {
 	}
 	$np->{'player_w'} = $pos->{'player_w'};
 	$np->{'player_b'} = $pos->{'player_b'};
-	my ($move, $nb) = $pos->{'board'}->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
-	$np->{'last_move'} = $move;
+	if (defined($pretty_move)) {
+		$np->{'last_move'} = $pretty_move;
+	} else {
+		my ($move, $nb) = $pos->{'board'}->prettyprint_move($from_row, $from_col, $to_row, $to_col, $promo);
+		$np->{'last_move'} = $move;
+	}
 	$np->{'last_move_uci'} = Board::move_to_uci_notation($from_row, $from_col, $to_row, $to_col, $promo);
 
 	return bless $np;