1 files changed, 77 insertions, 0 deletions
diff --git a/src/net/ea/protocol.cpp b/src/net/ea/protocol.cpp
new file mode 100644
index 00000000..69d69901
--- /dev/null
+++ b/src/net/ea/protocol.cpp
@@ -0,0 +1,77 @@
+/*
+ *  The Mana World
+ *  Copyright (C) 2004  The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  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
+ *  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 "protocol.h"
+
+#define LOBYTE(w)  ((unsigned char)(w))
+#define HIBYTE(w)  ((unsigned char)(((unsigned short)(w)) >> 8))
+
+void set_coordinates(char *data,
+                     unsigned short x,
+                     unsigned short y,
+                     unsigned char direction)
+{
+    short temp;
+    temp = x;
+    temp <<= 6;
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 2;
+    data[0] = HIBYTE(temp);
+    data[1] = (unsigned char)(temp);
+    temp = y;
+    temp <<= 4;
+    data[1] |= HIBYTE(temp);
+    data[2] = LOBYTE(temp);
+
+    // Translate direction to eAthena format
+    switch (direction)
+    {
+        case 1:
+            direction = 0;
+            break;
+        case 3:
+            direction = 1;
+            break;
+        case 2:
+            direction = 2;
+            break;
+        case 6:
+            direction = 3;
+            break;
+        case 4:
+            direction = 4;
+            break;
+        case 12:
+            direction = 5;
+            break;
+        case 8:
+            direction = 6;
+            break;
+        case 9:
+            direction = 7;
+            break;
+        default:
+            // OOPSIE! Impossible or unknown
+            direction = (unsigned char)-1;
+    }
+    data[2] |= direction;
+}