in fremantle additional software shall be in /home/opt/ where there is more space

[mancala] / src / mancala.c

diff --git a/src/mancala.c b/src/mancala.c
index c464f19..951bf37 100644 (file)
--- a/src/mancala.c
+++ b/src/mancala.c
@@ -6,6 +6,20 @@
  *  $Revision: 1.4.2.1 $
  *  $Date: 2003/12/29 05:49:52 $
  *
+ *  Copyright (C) 2003, 2004 Kevin Riggle
+ *  Copyright (C) 2009 Reto Zingg
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2, or (at your option) any
+ *  later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details, a copy of which may be found in
+ *  the file COPYING provided in the main directory of this release.
+ *
  */
 
 #include <stdlib.h>
@@ -59,40 +73,42 @@ int move(int *activeBoard, int *passiveBoard, int move) {
 
   currentPosition = activeBoard + move;
 
-  /* Pick up the stones. */
   stones = *(activeBoard + move);
-  *(activeBoard + move) = 0;
-
-  /* Loop for each stone. */
-  for (; stones>0; stones--) { 
-
-    /* Move to the next board location. */
-    if (currentPosition == activeBoard)
-      currentPosition = passiveBoard + BOARD_MAX;
-    else if (currentPosition == passiveBoard + 1)
-      currentPosition = activeBoard + BOARD_MAX;
-    else
-      currentPosition--;
-
-    /* Drop a stone. */
-    (*currentPosition)++;
-
+  if (stones > 0){
+      /* Pick up the stones. */
+      *(activeBoard + move) = 0;
+
+      /* Loop for each stone. */
+      for (; stones>0; stones--) {
+              /* Move to the next board location. */
+              if (currentPosition == activeBoard)
+                      currentPosition = passiveBoard + BOARD_MAX;
+              else if (currentPosition == passiveBoard + 1)
+                      currentPosition = activeBoard + BOARD_MAX;
+              else
+                      currentPosition--;
+              /* Drop a stone. */
+              (*currentPosition)++;
+      }
+      
+      /* If the last stone lands on an empty hole... */
+      if (*currentPosition == 1 && activeBoard < currentPosition && 
+              currentPosition <= (activeBoard + BOARD_MAX)) {
+              /* ...calculate the position of the opposite hole... */
+              int oppHole = (BOARD_MAX + 1) - (currentPosition - activeBoard);
+              /* ...and make the capture. */
+              *activeBoard = *activeBoard + *(passiveBoard + oppHole);
+              printf("Captured %d stones.\n", *(passiveBoard + oppHole));
+              *(passiveBoard + oppHole) = 0;
+      }
+      
+      return currentPosition - activeBoard;
   }
-
-  /* If the last stone lands on an empty hole... */
-  if (*currentPosition == 1 && activeBoard < currentPosition && 
-      currentPosition <= (activeBoard + BOARD_MAX)) {
-
-    /* ...calculate the position of the opposite hole... */
-    int oppHole = (BOARD_MAX + 1) - (currentPosition - activeBoard);
-
-    /* ...and make the capture. */
-    *activeBoard = *activeBoard + *(passiveBoard + oppHole);
-    printf("Captured %d stones.\n", *(passiveBoard + oppHole));
-    *(passiveBoard + oppHole) = 0;
+  else{
+      printf("move from empty hole...\n");
+      /* return 0 so human can make a move again */
+      return 0;
   }
-
-  return currentPosition - activeBoard;
    
 }