From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Sun, 15 Feb 2015 22:12:14 +0000 (+0100)
Subject: Fix promotion sweep of black Pawns in Shogi
X-Git-Url: http://winboard.nl/cgi-bin?p=xboard.git;a=commitdiff_plain;h=2fbce24cf46beda8a9049be879d5b82981ddf82d

Fix promotion sweep of black Pawns in Shogi

The wrap-around when we run past white King should not be done in
toggle mode, where it is guaranteed we won't run out of range.
---

diff --git a/backend.c b/backend.c
index 5b66016..4974fed 100644
--- a/backend.c
+++ b/backend.c
@@ -5399,8 +5399,8 @@ Sweep (int step)
 	if(step && !(toggleFlag && Partner(&promoSweep))) promoSweep -= step;
 	if(promoSweep == EmptySquare) promoSweep = BlackPawn; // wrap
 	else if((int)promoSweep == -1) promoSweep = WhiteKing;
-	else if(promoSweep == BlackPawn && step < 0) promoSweep = WhitePawn;
-	else if(promoSweep == WhiteKing && step > 0) promoSweep = BlackKing;
+	else if(promoSweep == BlackPawn && step < 0 && !toggleFlag) promoSweep = WhitePawn;
+	else if(promoSweep == WhiteKing && step > 0 && !toggleFlag) promoSweep = BlackKing;
 	if(!step) step = -1;
     } while(PieceToChar(promoSweep) == '.' || PieceToChar(promoSweep) == '~' || promoSweep == pawn ||
 	    !toggleFlag && PieceToChar(promoSweep) == '+' || // skip promoted versions of other