From a8b93f610b613be51a65986431e70c92625e340f Mon Sep 17 00:00:00 2001
From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Sun, 3 Jan 2016 12:38:18 +0100
Subject: [PATCH] Let parsing of O-O castlings pay attention to castling rank

The parser assumed O-O and O-O-O castlings would always take place
on the back rank, even when the newly introduced castlingRank array
specified differently.
---
 parser.c |    8 ++++----
 parser.h |    2 ++
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/parser.c b/parser.c
index 91c8edd..7235cae 100644
--- a/parser.c
+++ b/parser.c
@@ -619,12 +619,12 @@ badMove:// we failed to find algebraic move
 		if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
 
 		if (wom) {
-		    rf = 0;
-		    rt = 0;
+		    rf = castlingRank[0];
+		    rt = castlingRank[0];
 		    king = WhiteKing;
 		} else {
-	            rf = BOARD_HEIGHT-1;
-        	    rt = BOARD_HEIGHT-1;
+	            rf = castlingRank[3];
+        	    rt = castlingRank[3];
 		    king = BlackKing;
 		}
 		ff = (BOARD_WIDTH-1)>>1; // this would be d-file
diff --git a/parser.h b/parser.h
index cd52f6b..2147f3c 100644
--- a/parser.h
+++ b/parser.h
@@ -63,3 +63,5 @@ extern char *yy_text;  /* Needed because yytext can be either a char[]
 			  or a (non-constant) char* */
 extern int yyoffset P((void));
 extern signed char initialRights[BOARD_FILES];
+extern signed char  castlingRank[BOARD_FILES];
+
-- 
1.7.0.4