1 files changed, 63 insertions, 0 deletions
diff --git a/ksokoban/MapDelta.cpp b/ksokoban/MapDelta.cpp
new file mode 100644
index 00000000..bbf16ff4
--- /dev/null
+++ b/ksokoban/MapDelta.cpp
@@ -0,0 +1,63 @@
+/*
+ *  ksokoban - a Sokoban game for KDE
+ *  Copyright (C) 1998  Anders Widell  <d95-awi@nada.kth.se>
+ *
+ *  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 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <string.h>
+
+#include "MapDelta.h"
+
+
+MapDelta::MapDelta (Map *m) {
+  source_ = m;
+  ended_ = true;
+  start ();
+}
+
+void
+MapDelta::start () {
+  assert (ended_);
+  ((Map &) *this) = *source_;
+
+#if 0
+  memcpy (map_, source_->currentMap_, (MAX_Y+3)*(MAX_X+3)*sizeof (int));
+  for (int y=1; y<MAX_Y+2; y++) {
+    for (int x=1; x<MAX_X+2; x++) {
+      map_[y][x] = source_->currentMap_[y][x];
+    }
+  }
+  xpos_ = source_->xpos_;
+  ypos_ = source_->ypos_;
+#endif
+
+  ended_ = false;
+}
+
+void
+MapDelta::end () {
+  assert (!ended_);
+  for (int y=0; y<=MAX_Y; y++) {
+    for (int x=0; x<=MAX_X; x++) {
+      map (x, y, map (x, y) != source_->map (x, y));
+    }
+  }
+  if (xpos_ != source_->xpos_ || ypos_ != source_->ypos_) {
+    map (xpos_, ypos_, 1);
+    map (source_->xpos_, source_->ypos_, 1);
+  }
+  ended_ = true;
+}