From: Steinar H. Gunderson <sesse@debian.org>
Date: Sat, 30 Jun 2007 15:33:39 +0000 (+0200)
Subject: Fix so the prettyprinter understands en passant.
X-Git-Url: https://git.sesse.net/?p=remoteglot;a=commitdiff_plain;h=78c65f48f5141bf44b473cf3fb793671c8415539

Fix so the prettyprinter understands en passant.
---

diff --git a/remoteglot.pl b/remoteglot.pl
index 1bdfea0..9aaa43d 100755
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -254,6 +254,8 @@ sub prettyprint_pv {
 	if (scalar @pvs == 0 || !defined($pvs[0])) {
 		return ();
 	}
+	
+	my @nb = @$board;
 
 	my $pv = shift @pvs;
 	my $from_col = ord(substr($pv, 0, 1)) - ord('a');
@@ -270,8 +272,6 @@ sub prettyprint_pv {
 
 	# white short castling
 	if ($pv eq 'e1g1' && $piece eq 'K') {
-		my @nb = @$board;
-
 		# king
 		substr($nb[7], 4, 1, '-');
 		substr($nb[7], 6, 1, $piece);
@@ -285,8 +285,6 @@ sub prettyprint_pv {
 
 	# white long castling
 	if ($pv eq 'e1c1' && $piece eq 'K') {
-		my @nb = @$board;
-
 		# king
 		substr($nb[7], 4, 1, '-');
 		substr($nb[7], 2, 1, $piece);
@@ -300,8 +298,6 @@ sub prettyprint_pv {
 
 	# black short castling
 	if ($pv eq 'e8g8' && $piece eq 'k') {
-		my @nb = @$board;
-
 		# king
 		substr($nb[0], 4, 1, '-');
 		substr($nb[0], 6, 1, $piece);
@@ -315,8 +311,6 @@ sub prettyprint_pv {
 
 	# black long castling
 	if ($pv eq 'e8c8' && $piece eq 'k') {
-		my @nb = @$board;
-
 		# king
 		substr($nb[0], 4, 1, '-');
 		substr($nb[0], 2, 1, $piece);
@@ -331,8 +325,17 @@ sub prettyprint_pv {
 	# check if the from-piece is a pawn
 	if (lc($piece) eq 'p') {
 		# attack?
-		if (substr($board->[$to_row], $to_col, 1) ne '-') {
+		if ($from_col != $to_col) {
 			$pretty = substr($pv, 0, 1) . 'x' . substr($pv, 2, 2);
+
+			# en passant?
+			if (substr($board->[$to_row], $to_col, 1) eq '-') {
+				if ($piece eq 'p') {
+					substr($nb[$to_row + 1], $to_col, 1, '-');
+				} else {
+					substr($nb[$to_row - 1], $to_col, 1, '-');
+				}
+			}
 		} else {
 			$pretty = substr($pv, 2, 2);
 
@@ -394,7 +397,6 @@ sub prettyprint_pv {
 	}
 
 	# update the board
-	my @nb = @$board;
 	substr($nb[$from_row], $from_col, 1, '-');
 	substr($nb[$to_row], $to_col, 1, $piece);