1 files changed, 90 insertions, 0 deletions

diff --git a/source/LuaState.h b/source/LuaState.h
new file mode 100644
index 000000000..10ff53911
--- /dev/null
+++ b/source/LuaState.h
@@ -0,0 +1,90 @@
+
+// LuaState.h
+
+// Declares the cLuaState class representing the wrapper over lua_State *, provides associated helper functions
+
+
+
+
+
+#pragma once
+
+
+
+
+
+// fwd: lua.h
+struct lua_State;
+
+
+
+
+
+class cLuaState
+{
+public:
+	/** Creates a new instance. The LuaState is not initialized.
+	a_SubsystemName is used for reporting problems in the console, it is "plugin %s" for plugins, 
+	or "LuaScript" for the cLuaScript template
+	*/
+	cLuaState(const AString & a_SubsystemName);
+	
+	~cLuaState();
+	
+	operator lua_State * (void) { return m_LuaState; }
+	
+	/// Creates the m_LuaState, if not closed already
+	void Create(void);
+	
+	/// Closes the m_LuaState, if not closed already
+	void Close(void);
+	
+	/// Returns true if the m_LuaState is valid
+	bool IsValid(void) const { return (m_LuaState != NULL); }
+	
+	/** Loads the specified file
+	Returns false and logs a warning to the console if not successful (but the LuaState is kept open).
+	m_SubsystemName is displayed in the warning log message.
+	*/
+	bool LoadFile(const AString & a_FileName);
+	
+	/** Pushes the function of the specified name onto the stack.
+	Returns true if successful.
+	If a_ShouldLogFail is true, logs a warning on failure (incl. m_SubsystemName)
+	*/
+	bool PushFunction(const char * a_FunctionName, bool a_ShouldLogFailure = true);
+	
+	/** Pushes a function that has been saved into the global registry, identified by a_FnRef.
+	Returns true if successful. Logs a warning on failure
+	*/
+	bool PushFunctionFromRegistry(int a_FnRef);
+	
+	/// Pushes a string vector, as a table, onto the stack
+	void PushStringVector(const AStringVector & a_Vector);
+	
+	/**
+	Calls the function that has been pushed onto the stack by PushFunction.
+	Returns true if successful, logs a warning on failure.
+	a_FunctionName is used only for the warning log message, the function
+	to be called must be pushed by PushFunction() beforehand.
+	*/
+	bool CallFunction(int a_NumArgs, int a_NumResults, const char * a_FunctionName);
+
+	/// If the status is nonzero, prints the text on the top of Lua stack and returns true
+	bool ReportErrors(int status);
+	
+	/// If the status is nonzero, prints the text on the top of Lua stack and returns true
+	static bool ReportErrors(lua_State * a_LuaState, int status);
+	
+protected:
+	lua_State * m_LuaState;
+	
+	/** The subsystem name is used for reporting errors to the console, it is either "plugin %s" or "LuaScript"
+	whatever is given to the constructor
+	*/
+	AString m_SubsystemName;
+} ;
+
+
+
+