From 14584f69e69ced03446dac6d30d033f63b4dc5a6 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Mon, 2 Jul 2012 11:21:21 +0000
Subject: Added the cWorld::DoWithPlayer() function and exported it in the Lua
 API. Removed the obsolete cWorld::GetPlayer() function.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@639 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/ManualBindings.cpp | 92 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

(limited to 'source/ManualBindings.cpp')

diff --git a/source/ManualBindings.cpp b/source/ManualBindings.cpp
index 92414d897..722e71a54 100644
--- a/source/ManualBindings.cpp
+++ b/source/ManualBindings.cpp
@@ -17,6 +17,9 @@
 #include "md5/md5.h"
 
 
+
+
+
 static bool report_errors(lua_State* lua, int status)
 {
 	if ( status!=0 )
@@ -30,6 +33,9 @@ static bool report_errors(lua_State* lua, int status)
 }
 
 
+
+
+
 /****************************
  * Lua bound functions with special return types
  **/
@@ -102,6 +108,91 @@ static int tolua_LOGERROR(lua_State* tolua_S)
 
 
 
+static int tolua_cWorld_DoWithPlayer(lua_State * tolua_S)
+{
+	int NumArgs = lua_gettop(tolua_S) - 1;  /* This includes 'self' */
+	if ((NumArgs != 2) && (NumArgs != 3))
+	{
+		LOGWARN("Error in function call 'cWorld:DoWithPlayer()': Requires 2 or 3 arguments, got %i", NumArgs );
+		return 0;
+	}
+	
+	cWorld * self = (cWorld *)  tolua_tousertype(tolua_S, 1, 0);
+
+	const char * PlayerName = tolua_tocppstring(tolua_S, 2, "");
+	if ((PlayerName == NULL) || (PlayerName[0] == 0))
+	{
+		LOGWARN("Error in function call 'cWorld:DoWithPlayer()': Expected a non-empty string for parameter #1");
+		return 0;
+	}
+	if (!lua_isfunction( tolua_S, 3))
+	{
+		LOGWARN("Error in function call 'cWorld:DoWithPlayer()': Expected a function for parameter #2");
+		return 0;
+	}
+	
+	/* luaL_ref gets reference to value on top of the stack, the table is the last argument and therefore on the top */
+	int TableRef = LUA_REFNIL;
+	if (NumArgs == 3)
+	{
+		TableRef = luaL_ref(tolua_S, LUA_REGISTRYINDEX);
+		if (TableRef == LUA_REFNIL)
+		{
+			LOGWARN("Error in function call 'cWorld:DoWithPlayer()': Could not get value reference of parameter #3");
+			return 0;
+		}
+	}
+	
+	/* table value is popped, and now function is on top of the stack */
+	int FuncRef = luaL_ref(tolua_S, LUA_REGISTRYINDEX);
+	if (FuncRef == LUA_REFNIL)
+	{
+		LOGWARN("Error in function call 'cWorld:DoWithPlayer()': Could not get function reference of parameter #2");
+		return 0;
+	}
+	
+	class cLuaCallback : public cItemCallback<cPlayer>
+	{
+	public:
+		cLuaCallback(lua_State* a_LuaState, int a_FuncRef, int a_TableRef)
+			: LuaState( a_LuaState )
+			, FuncRef( a_FuncRef )
+			, TableRef( a_TableRef )
+		{}
+		
+	private:
+		virtual bool Item(cPlayer * a_Item) override
+		{
+			lua_rawgeti( LuaState, LUA_REGISTRYINDEX, FuncRef);  /* Push function reference */
+			tolua_pushusertype(LuaState, a_Item, "cPlayer");
+			if (TableRef != LUA_REFNIL)
+			{
+				lua_rawgeti( LuaState, LUA_REGISTRYINDEX, TableRef);  /* Push table reference */
+			}
+			
+			int s = lua_pcall(LuaState, (TableRef == LUA_REFNIL ? 1 : 2), 1, 0);
+			report_errors(LuaState, s);
+			return true;
+		}
+		lua_State * LuaState;
+		int FuncRef;
+		int TableRef;
+	} Callback(tolua_S, FuncRef, TableRef);
+	
+	bool bRetVal = self->DoWithPlayer(PlayerName, Callback);
+	
+	/* Unreference the values again, so the LUA_REGISTRYINDEX can make place for other references */
+	luaL_unref(tolua_S, LUA_REGISTRYINDEX, TableRef);
+	luaL_unref(tolua_S, LUA_REGISTRYINDEX, FuncRef);
+	
+	/* Push return value on stack */
+	tolua_pushboolean(tolua_S, bRetVal );
+	return 1;
+}
+
+
+
+
 #define DEFINE_LUA_FOREACHINCHUNK(CONTAINER,ITEM,FOREACH,FNNAME) \
 static int FNNAME(lua_State * tolua_S) \
 { \
@@ -601,6 +692,7 @@ void ManualBindings::Bind( lua_State* tolua_S )
 			tolua_function(tolua_S, "ForEachEntityInChunk",  tolua_cWorld_ForEachEntityInChunk);
 			tolua_function(tolua_S, "ForEachChestInChunk",   tolua_cWorld_ForEachChestInChunk);
 			tolua_function(tolua_S, "ForEachFurnaceInChunk", tolua_cWorld_ForEachFurnaceInChunk);
+			tolua_function(tolua_S, "DoWithPlayer", tolua_cWorld_DoWithPlayer);
 		tolua_endmodule(tolua_S);
 		
 		tolua_beginmodule(tolua_S, "cPlugin");
-- 
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