From 4e34e438f12abb31f2409ce9d50df8acc2128555 Mon Sep 17 00:00:00 2001
From: faketruth <faketruth@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 26 Jan 2012 20:39:46 +0000
Subject: Working on a new plugin design with Lua. While retaining backwards
 compatibility of course... In this new design a plugin consists of a folder
 with Lua files, this should enable plugin developers to keep things separate
 and have more overview.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@172 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/cPlugin_NewLua.cpp | 121 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 source/cPlugin_NewLua.cpp

(limited to 'source/cPlugin_NewLua.cpp')

diff --git a/source/cPlugin_NewLua.cpp b/source/cPlugin_NewLua.cpp
new file mode 100644
index 000000000..90647e011
--- /dev/null
+++ b/source/cPlugin_NewLua.cpp
@@ -0,0 +1,121 @@
+#define LUA_USE_POSIX
+#include "cPlugin_NewLua.h"
+#include "cMCLogger.h"
+
+extern "C"
+{
+#include "lualib.h"
+}
+
+#include "tolua++.h"
+#include "Bindings.h"
+#include "ManualBindings.h"
+
+extern bool report_errors(lua_State* lua, int status);
+
+cPlugin_NewLua::cPlugin_NewLua( const char* a_PluginName )
+	: m_LuaState( 0 )
+{
+	m_Directory = a_PluginName;
+}
+
+cPlugin_NewLua::~cPlugin_NewLua()
+{
+	if( m_LuaState )
+	{
+		lua_close( m_LuaState );
+		m_LuaState = 0;
+	}
+}
+
+bool cPlugin_NewLua::Initialize()
+{
+	if( !m_LuaState ) 
+	{	
+		m_LuaState = lua_open();
+		luaL_openlibs( m_LuaState );
+		tolua_AllToLua_open(m_LuaState);
+		ManualBindings::Bind( m_LuaState );
+	}
+
+	std::string PluginFiles[] = {	 std::string("Plugins/") + m_Directory + "/tick.lua"
+									,std::string("Plugins/") + m_Directory + "/main.lua" };
+
+
+	// Load all files for this plugin, and execute them
+	for( int i = 0; i < 2; ++i )
+	{
+		int s = luaL_loadfile(m_LuaState, PluginFiles[i].c_str() );
+		if( report_errors( m_LuaState, s ) )
+		{
+			LOGERROR("Can't load plugin %s because of an error in file %s", m_Directory.c_str(), PluginFiles[i].c_str() );
+			lua_close( m_LuaState );
+			m_LuaState = 0;
+			return false;
+		}
+
+		s = lua_pcall(m_LuaState, 0, LUA_MULTRET, 0);
+		if( report_errors( m_LuaState, s ) )
+		{
+			LOGERROR("Error in plugin %s in file %s", m_Directory.c_str(), PluginFiles[i].c_str() );
+			lua_close( m_LuaState );
+			m_LuaState = 0;
+			return false;
+		}
+	}
+
+
+	// Call intialize function
+	lua_getglobal(m_LuaState, "Initialize");
+	if(!lua_isfunction(m_LuaState,-1))
+	{
+		LOGWARN("Error in plugin %s: Could not find function Initialize()", m_Directory.c_str() );
+		lua_pop(m_LuaState,1);
+		lua_close( m_LuaState );
+		m_LuaState = 0;
+		return false;
+	}
+
+	tolua_pushusertype(m_LuaState, this, "cPlugin_NewLua");
+
+	// do the call (1 arguments, 1 result)
+	int s = lua_pcall(m_LuaState, 1, 1, 0);
+	if( report_errors( m_LuaState, s ) ) 
+	{
+		LOGWARN("Error in plugin %s calling function Initialize()", m_Directory.c_str() );
+		lua_close( m_LuaState );
+		m_LuaState = 0;
+		return false;
+	}
+
+	if( !lua_isboolean( m_LuaState, -1 ) )
+	{
+		LOGWARN("Error in plugin %s Initialize() must return a boolean value!", m_Directory.c_str() );
+		lua_close( m_LuaState );
+		m_LuaState = 0;
+		return false;
+	}
+
+	bool bSuccess = (tolua_toboolean( m_LuaState, -1, 0) > 0);
+	return bSuccess;
+}
+
+void cPlugin_NewLua::Tick(float a_Dt)
+{
+	lua_getglobal(m_LuaState, "Tick");
+	if(!lua_isfunction(m_LuaState,-1))
+	{
+		LOGWARN("Error in plugin %s: Could not find function Tick()", m_Directory.c_str() );
+		lua_pop(m_LuaState,1);
+		return;
+	}
+
+	tolua_pushnumber( m_LuaState, a_Dt );
+
+	// do the call (1 arguments, 0 result)/
+	int s = lua_pcall(m_LuaState, 1, 0, 0);
+	if( report_errors( m_LuaState, s ) )
+	{
+		LOGWARN("Error in plugin %s calling function Tick()", m_Directory.c_str() );
+	}
+}
\ No newline at end of file
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