From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sat, 6 Jan 2018 11:18:09 +0000 (+0100)
Subject: Remove bitpacked_fen, which is only really in use for the book (which is forked off... 
X-Git-Url: https://git.sesse.net/?p=remoteglot;a=commitdiff_plain;h=064c1bd8e1689b614d75e005e5379fe4806ba15b

Remove bitpacked_fen, which is only really in use for the book (which is forked off for now).
---

diff --git a/Board.pm b/Board.pm
index 3e0fd33..6df8eca 100644
--- a/Board.pm
+++ b/Board.pm
@@ -233,42 +233,6 @@ sub fen {
 # Returns a compact bit string describing the same data as fen().
 # This is encoded using a Huffman-like encoding, and should be
 # typically about 1/3 the number of bytes.
-sub bitpacked_fen {
-	my ($board) = @_;
-	my $bits = "";
-
-	for my $row (0..7) {
-		for my $col (0..7) {
-			my $piece = $board->[$row][$col];
-			if ($piece eq '-') {
-				$bits .= "0";
-				next;
-			}
-
-			my $color = (lc($piece) eq $piece) ? 0 : 1;
-			$bits .= "1" . $color;
-
-			if (lc($piece) eq 'p') {
-				$bits .= "0";
-			} elsif (lc($piece) eq 'n') {
-				$bits .= "100";
-			} elsif (lc($piece) eq 'b') {
-				$bits .= "101";
-			} elsif (lc($piece) eq 'r') {
-				$bits .= "1110";
-			} elsif (lc($piece) eq 'q') {
-				$bits .= "11110";
-			} elsif (lc($piece) eq 'k') {
-				$bits .= "11111";
-			} else {
-				die "Unknown piece $piece";
-			}
-		}
-	}
-
-	return pack('b*', $bits);
-}
-
 sub can_reach {
 	my ($board, $piece, $from_row, $from_col, $to_row, $to_col) = @_;
 	
diff --git a/Position.pm b/Position.pm
index c3dbcca..39b89ac 100644
--- a/Position.pm
+++ b/Position.pm
@@ -132,35 +132,6 @@ 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() };