+/*
+ * Copyright © 2006 Carl Worth
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA."
+ */
+
+#include "word-game.h"
+
+#include <string.h>
+
+static char tile_distribution[BAG_SIZE+1] =
+"AAAAAAAAABBCCDDDDEEEEEEEEEEEEFFGGGHHIIIIIIIIIJKLLLL"
+"MMNNNNNNOOOOOOOOPPQRRRRRRSSSSTTTTTTUUUUVVWWXYYZ??";
+
+static int
+rand_within (int num_values)
+{
+ return (int) ((double) num_values * (rand() / (RAND_MAX + 1.0)));
+}
+
+static void
+shuffle (char *array, int length)
+{
+ int i, r, tmp;
+
+ for (i = 0; i < length; i++)
+ {
+ r = i + rand_within (length - i);
+ tmp = array[i];
+ array[i] = array[r];
+ array[r] = tmp;
+ }
+}
+
+void
+bag_init (bag_t *bag)
+{
+ memcpy (bag->tiles, tile_distribution, BAG_SIZE);
+}
+
+void
+bag_shuffle (bag_t *bag)
+{
+ shuffle (bag->tiles, BAG_SIZE);
+}
+