From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Wed, 27 Jan 2010 12:34:55 +0000 (+0100)
Subject: Small fix in editing castling rights
X-Git-Tag: gtk-20100206~3
X-Git-Url: http://winboard.nl/cgi-bin?p=xboard.git;a=commitdiff_plain;h=14ae6044530978bb1bf5ff45cc14376b3832c457

Small fix in editing castling rights

If there is no King with rights, the e-file is used to decide if a Rook
with rights is the K-side or Q-side Rook. This at least works with
corner Rooks, to avoid disappearence of Rook-rights on repetitive
editing of a position through intermediates with no King-rights.
---

diff --git a/backend.c b/backend.c
index 2c245d6..cfc9b6f 100644
--- a/backend.c
+++ b/backend.c
@@ -12023,11 +12023,13 @@ EditPositionDone(Boolean fakeRights)
       kf = NoRights; err = 0;
       for(f=BOARD_RGHT-1; f>=0; f--)
 	if(rightsBoard[0][f] == 2) { if(kf != NoRights) err=10; boards[0][CASTLING][2] = kf = f; }
+      if(kf == NoRights) kf = 4;
       for(f=BOARD_RGHT-1; f>=0; f--)
 	if(rightsBoard[0][f] == 1) { err++; boards[0][CASTLING][f<kf] = f; }
       kf = NoRights; err = 0;
       for(f=BOARD_RGHT-1; f>=0; f--)
 	if(rightsBoard[BOARD_HEIGHT-1][f] == 2) { if(kf != NoRights) err=10; boards[0][CASTLING][5] = kf = f; }
+      if(kf == NoRights) kf = 4;
       for(f=BOARD_RGHT-1; f>=0; f--)
 	if(rightsBoard[BOARD_HEIGHT-1][f] == 1) { err++; boards[0][CASTLING][3+(f<kf)] = f; }
       if(err + 2 > nrCastlingRights) DisplayError("unclear castling rights", 0);