Merge pull request #455 from giom/master

Lua AddSearchPath issue #647

cocos2dx/include/CCScriptSupport.h

@@ -65,6 +65,8 @@ public:
 
 	// execute a schedule function
 	virtual bool executeSchedule(const char* pszFuncName, ccTime t) = 0;
+    // add a search path  
+    virtual bool addSearchPath(const char* pszPath) = 0;
 };
 
 /**

lua/cocos2dx_support/LuaEngine.cpp

@@ -81,3 +81,9 @@ bool LuaEngine::executeSchedule(const char* pszFuncName, ccTime t)
 {
 	return CCLuaScriptModule::sharedLuaScriptModule()->executeSchedule(pszFuncName, t);
 }
+
+bool LuaEngine::addSearchPath(const char* pszPath)
+{
+	return CCLuaScriptModule::sharedLuaScriptModule()->addSearchPath(pszPath);
+}
+

lua/cocos2dx_support/LuaEngine.h

@@ -49,6 +49,8 @@ public:
 
 	// execute a schedule function
 	virtual bool executeSchedule(const char* pszFuncName, cocos2d::ccTime t);
+    // add a search path  
+    virtual bool addSearchPath(const char* pszPath);
 };
 
 #endif // __LUA_ENGINE_H__

lua/cocos2dx_support/LuaEngineImpl.cpp

@@ -100,6 +100,23 @@ CCLuaScriptModule::~CCLuaScriptModule()
 
 }
 
+
+/*************************************************************************
+    Add a path to find lua files in (equivalent to LUA_PATH)
+ *************************************************************************/
+bool CCLuaScriptModule::addSearchPath(const std::string& path)
+{
+    lua_getglobal( d_state, "package" );
+    lua_getfield( d_state, -1, "path" ); // get field "path" from table at top of stack (-1)
+    const char* cur_path =  lua_tostring( d_state, -1 ); // grab path string from top of stack
+    lua_pop( d_state, 1 ); // get rid of the string on the stack we just pushed on line 5
+    lua_pushfstring(d_state, "%s;%s/?.lua", cur_path, path.c_str());
+    lua_setfield( d_state, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
+    lua_pop( d_state, 1 ); // get rid of package table from top of stack
+    return 0; // all done!
+}
+
+
 /*************************************************************************
 	Execute script file
 *************************************************************************/

lua/cocos2dx_support/LuaEngineImpl.h

@@ -60,7 +60,15 @@ public:
      @brief Destructor for LuaScriptModule class.
 	*/
 	virtual ~CCLuaScriptModule();
-
+    
+	/*************************************************************************
+        Seting Functions
+     *************************************************************************/
+    /**
+     @brief Add a path to find lua files in
+     @param path to be added to the Lua path
+    */
+    bool addSearchPath(const std::string& path);
 
 	/*************************************************************************
 		Script Execution Functions