1 files changed, 91 insertions, 0 deletions
diff --git a/src/scripting/luautil.cpp b/src/scripting/luautil.cpp
new file mode 100644
index 00000000..a18b710f
--- /dev/null
+++ b/src/scripting/luautil.cpp
@@ -0,0 +1,91 @@
+/*
+ *  The Mana World Server
+ *  Copyright 2007 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "luautil.hpp"
+
+#include "game-server/character.hpp"
+#include "game-server/npc.hpp"
+
+#include "utils/logger.h"
+
+
+void raiseScriptError(lua_State *s, const char *format, ...)
+{
+    va_list args;
+    va_start(args, format);
+    char message[1024];
+    vsprintf(message, format, args);
+    va_end( args );
+
+    LOG_WARN("Lua script error: "<<message);
+    luaL_error(s, message);
+}
+
+/* Functions below are unsafe, as they assume the script has passed pointers
+   to objects which have not yet been destroyed. If the script never keeps
+   pointers around, there will be no problem. In order to be safe, the engine
+   should replace pointers by local identifiers and store them in a map. By
+   listening to the death of objects, it could keep track of pointers still
+   valid in the map.
+   TODO: do it. */
+
+NPC *getNPC(lua_State *s, int p)
+{
+    if (!lua_islightuserdata(s, p)) return NULL;
+    Thing *t = static_cast<Thing *>(lua_touserdata(s, p));
+    if (t->getType() != OBJECT_NPC) return NULL;
+    return static_cast<NPC *>(t);
+}
+
+Character *getCharacter(lua_State *s, int p)
+{
+    if (!lua_islightuserdata(s, p)) return NULL;
+    Thing *t = static_cast<Thing *>(lua_touserdata(s, p));
+    if (t->getType() != OBJECT_CHARACTER) return NULL;
+    return static_cast<Character *>(t);
+}
+
+Being *getBeing(lua_State *s, int p)
+{
+    if (!lua_islightuserdata(s, p)) return NULL;
+    Thing *t = static_cast<Thing *>(lua_touserdata(s, p));
+    return static_cast<Being *>(t);
+}
+
+void push(lua_State *s, int val)
+{
+    lua_pushinteger(s, val);
+}
+
+void push(lua_State *s, const std::string &val)
+{
+    lua_pushstring(s, val.c_str());
+}
+
+void push(lua_State *s, Thing* val)
+{
+    lua_pushlightuserdata(s, val);
+}
+
+void push(lua_State *s, double val)
+{
+    lua_pushnumber(s, val);
+}