# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1395505387 -3600
# Node ID 1347e4dabac0ab3a9567064ff4e8a919c6ab8eb2
# Parent  4e4f156bba58fe4de1626f35f34645690da76654
prepared code base for implementing rules

diff -r 4e4f156bba58 -r 1347e4dabac0 Makefile
--- a/Makefile	Sat Mar 22 16:25:49 2014 +0100
+++ b/Makefile	Sat Mar 22 17:23:07 2014 +0100
@@ -30,11 +30,15 @@
 
 all: clean compile
 	
-compile: build
+compile: build build/rules
 	cd src; $(MAKE)
 
 build:
 	$(MKDIR) build
+
+build/rules:
+	$(MKDIR) build/rules
 	
 clean:
 	$(RM) -f -R build
+	$(RM) -f -R build/rules
diff -r 4e4f156bba58 -r 1347e4dabac0 src/Makefile
--- a/src/Makefile	Sat Mar 22 16:25:49 2014 +0100
+++ b/src/Makefile	Sat Mar 22 17:23:07 2014 +0100
@@ -35,6 +35,13 @@
 SRC += client.c
 SRC += game.c
 
+SRC += rules/pawn.c
+SRC += rules/rook.c
+SRC += rules/knight.c
+SRC += rules/bishop.c
+SRC += rules/queen.c
+SRC += rules/king.c
+
 OBJ = $(SRC:%.c=../build/%$(OBJ_EXT))
 
 all: $(OBJ)
diff -r 4e4f156bba58 -r 1347e4dabac0 src/game.c
--- a/src/game.c	Sat Mar 22 16:25:49 2014 +0100
+++ b/src/game.c	Sat Mar 22 17:23:07 2014 +0100
@@ -29,6 +29,7 @@
 
 #include "game.h"
 #include "input.h"
+#include "rules/rules.h"
 #include <ncurses.h>
 #include <string.h>
 
@@ -91,16 +92,39 @@
 }
 
 static _Bool validate_move(Board board, uint8_t mycolor, Move *move) {
-    _Bool result = TRUE;
+    _Bool result;
     
     /* does piece exist */
-    result &= board[move->fromrow][move->fromfile] == move->piece;
+    result = board[move->fromrow][move->fromfile] == move->piece;
     
-    /* does move comply to rules */
-    // TODO: make it so
-    
-    /* is piece blocked */
-    // TODO: make it so
+    switch (move->piece & PIECE_MASK) {
+    case PAWN:
+        result = result && pawn_chkrules(board, move);
+        result = result && !pawn_isblocked(board, move);
+        break;
+    case ROOK:
+        result = result && rook_chkrules(board, move);
+        result = result && !rook_isblocked(board, move);
+        break;
+    case KNIGHT:
+        result = result && knight_chkrules(board, move);
+        result = result && !knight_isblocked(board, move);
+        break;
+    case BISHOP:
+        result = result && bishop_chkrules(board, move);
+        result = result && !bishop_isblocked(board, move);
+        break;
+    case QUEEN:
+        result = result && queen_chkrules(board, move);
+        result = result && !queen_isblocked(board, move);
+        break;
+    case KING:
+        result = result && king_chkrules(board, move);
+        result = result && !king_isblocked(board, move);
+        break;
+    default:
+        result = FALSE;
+    }
     
     /* is piece pinned */
     // TODO: make it so
@@ -122,28 +146,17 @@
     if (len == 2) {
         /* pawn move (e.g. "e4") */
         if (isfile(mstr[0]) && isrow(mstr[1])) {
-            move->piece = PAWN;
-            move->fromfile = move->tofile = fileidx(mstr[0]);
+            move->piece = PAWN|mycolor;
+            move->tofile = fileidx(mstr[0]);
             move->torow = rowidx(mstr[1]);
-            move->fromrow = rowidx(mstr[1]) + (mycolor == WHITE ? -1 : 1);
-            if (move->fromrow > 6) {
+            if (!pawn_getlocation(board, move)) {
                 move->piece = 0;
-            } else {
-                /* advanced first move */
-                if (move->fromrow == (mycolor == WHITE ? 2 : 5) &&
-                    board[move->fromrow][move->fromfile] != (mycolor|PAWN)) {
-                    
-                    move->fromrow += (mycolor == WHITE ? -1 : 1);
-                    if (move->fromrow > 6) {
-                        move->piece = 0;
-                    }
-                }
             }
         }
     } else if (len == 3) {
         if (strcmp(mstr, "O-O") == 0) {
             /* king side castling */
-            move->piece = KING;
+            move->piece = KING|mycolor;
             move->fromfile = fileidx('e');
             move->tofile = fileidx('g');
             move->fromrow = move->torow = mycolor == WHITE ? 0 : 7;
@@ -159,7 +172,7 @@
     } else if (len == 5) {
         if (strcmp(mstr, "O-O-O") == 0) {
             /* queen side castling "O-O-O" */
-            move->piece = KING;
+            move->piece = KING|mycolor;
             move->fromfile = fileidx('e');
             move->tofile = fileidx('c');
             move->fromrow = move->torow = mycolor == WHITE ? 0 : 7;
@@ -174,12 +187,7 @@
         /* long notation capture (e.g. "Nc5xf3") */
     }
     
-    if (move->piece) {
-        move->piece |= mycolor;
-        return TRUE;
-    } else {
-        return FALSE;
-    }
+    return move->piece != 0;
 }
 
 static int sendmove(Board board, uint8_t mycolor, int opponent) {
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/bishop.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/bishop.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,45 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "bishop.h"
+
+_Bool bishop_chkrules(Board board, Move* move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool bishop_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool bishop_getlocation(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/bishop.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/bishop.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,48 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef BISHOP_H
+#define	BISHOP_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool bishop_chkrules(Board board, Move *move);
+_Bool bishop_isblocked(Board board, Move *move);
+_Bool bishop_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* BISHOP_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/king.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/king.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,45 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "king.h"
+
+_Bool king_chkrules(Board board, Move* move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool king_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool king_getlocation(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/king.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/king.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,49 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#ifndef KING_H
+#define	KING_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool king_chkrules(Board board, Move *move);
+_Bool king_isblocked(Board board, Move *move);
+_Bool king_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* KING_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/knight.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/knight.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,45 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "knight.h"
+
+_Bool knight_chkrules(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool knight_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool knight_getlocation(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/knight.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/knight.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,48 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef KNIGHT_H
+#define	KNIGHT_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool knight_chkrules(Board board, Move *move);
+_Bool knight_isblocked(Board board, Move *move);
+_Bool knight_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* KNIGHT_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/pawn.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/pawn.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,61 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "pawn.h"
+
+_Bool pawn_chkrules(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool pawn_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool pawn_getlocation(Board board, Move *move) {
+    int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1);
+    
+    move->fromfile = move->tofile;
+    move->fromrow = move->torow + d;
+    if (move->fromrow > 6) {
+        return FALSE;
+    } else {
+        /* advanced first move */
+        if (move->fromrow == (d < 0 ? 2 : 5) &&
+            board[move->fromrow][move->fromfile] != move->piece) {
+
+            move->fromrow += d;
+            if (move->fromrow > 6) {
+                return FALSE;
+            }
+        }
+    }
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/pawn.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/pawn.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,48 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef PAWN_H
+#define	PAWN_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool pawn_chkrules(Board board, Move *move);
+_Bool pawn_isblocked(Board board, Move *move);
+_Bool pawn_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* PAWN_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/queen.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/queen.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,45 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "queen.h"
+
+_Bool queen_chkrules(Board board, Move* move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool queen_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool queen_getlocation(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/queen.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/queen.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,48 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef QUEEN_H
+#define	QUEEN_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool queen_chkrules(Board board, Move *move);
+_Bool queen_isblocked(Board board, Move *move);
+_Bool queen_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* QUEEN_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/rook.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/rook.c	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,45 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "rook.h"
+
+_Bool rook_chkrules(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
+
+_Bool rook_isblocked(Board board, Move *move) {
+    // TODO: implement
+    return FALSE;
+}
+
+_Bool rook_getlocation(Board board, Move *move) {
+    // TODO: implement
+    return TRUE;
+}
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/rook.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/rook.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,48 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef ROOK_H
+#define	ROOK_H
+
+#include "../game.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+_Bool rook_chkrules(Board board, Move *move);
+_Bool rook_isblocked(Board board, Move *move);
+_Bool rook_getlocation(Board board, Move *move);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* ROOK_H */
+
diff -r 4e4f156bba58 -r 1347e4dabac0 src/rules/rules.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/rules/rules.h	Sat Mar 22 17:23:07 2014 +0100
@@ -0,0 +1,41 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef RULES_H
+#define	RULES_H
+
+#include "pawn.h"
+#include "rook.h"
+#include "knight.h"
+#include "bishop.h"
+#include "queen.h"
+#include "king.h"
+
+#endif	/* RULES_H */
+