public ObjectTranslator (Lua interpreter, LuaCore.lua_State luaState)
{
this.interpreter = interpreter;
typeChecker = new CheckType (this);
metaFunctions = new MetaFunctions (this);
assemblies = new List<Assembly> ();
importTypeFunction = new LuaCore.lua_CFunction (ObjectTranslator.importType);
loadAssemblyFunction = new LuaCore.lua_CFunction (ObjectTranslator.loadAssembly);
registerTableFunction = new LuaCore.lua_CFunction (ObjectTranslator.registerTable);
unregisterTableFunction = new LuaCore.lua_CFunction (ObjectTranslator.unregisterTable);
getMethodSigFunction = new LuaCore.lua_CFunction (ObjectTranslator.getMethodSignature);
getConstructorSigFunction = new LuaCore.lua_CFunction (ObjectTranslator.getConstructorSignature);
createLuaObjectList (luaState);
createIndexingMetaFunction (luaState);
createBaseClassMetatable (luaState);
createClassMetatable (luaState);
createFunctionMetatable (luaState);
setGlobalFunctions (luaState);
}
private int registerTableInternal (LuaCore.lua_State luaState)
{
if (LuaLib.lua_type (luaState, 1) == LuaTypes.Table) {
var luaTable = getTable (luaState, 1);
string superclassName = LuaLib.lua_tostring (luaState, 2).ToString ();
if (!superclassName.IsNull ()) {
var klass = FindType (superclassName);
if (!klass.IsNull ()) {
// Creates and pushes the object in the stack, setting
// it as the metatable of the first argument
object obj = CodeGeneration.Instance.GetClassInstance (klass, luaTable);
pushObject (luaState, obj, "luaNet_metatable");
LuaLib.lua_newtable (luaState);
LuaLib.lua_pushstring (luaState, "__index");
LuaLib.lua_pushvalue (luaState, -3);
LuaLib.lua_settable (luaState, -3);
LuaLib.lua_pushstring (luaState, "__newindex");
LuaLib.lua_pushvalue (luaState, -3);
LuaLib.lua_settable (luaState, -3);
LuaLib.lua_setmetatable (luaState, 1);
// Pushes the object again, this time as the base field
// of the table and with the luaNet_searchbase metatable
LuaLib.lua_pushstring (luaState, "base");
int index = addObject (obj);
pushNewObject (luaState, obj, index, "luaNet_searchbase");
LuaLib.lua_rawset (luaState, 1);
} else
throwError (luaState, "register_table: can not find superclass '" + superclassName + "'");
} else
throwError (luaState, "register_table: superclass name can not be null");
} else
throwError (luaState, "register_table: first arg is not a table");
return 0;
}
static int PanicCallback (LuaCore.lua_State luaState)
{
string reason = string.Format ("unprotected error in call to Lua API ({0})", LuaLib.lua_tostring (luaState, -1));
throw new LuaException (reason);
}
internal void pushCSFunction (LuaCore.lua_CFunction function)
{
translator.pushFunction (luaState, function);
}
private static void DebugHookCallback (LuaCore.lua_State luaState, LuaCore.lua_Debug luaDebug)
{
var translator = ObjectTranslatorPool.Instance.Find (luaState);
var lua = translator.Interpreter;
lua.DebugHookCallbackInternal (luaState, luaDebug);
}
/*
* Pushes the object into the Lua stack according to its type.
*/
internal void push (LuaCore.lua_State luaState, object o)
{
if (o.IsNull ())
LuaLib.lua_pushnil (luaState);
else if (o is sbyte || o is byte || o is short || o is ushort ||
o is int || o is uint || o is long || o is float ||
o is ulong || o is decimal || o is double) {
double d = Convert.ToDouble (o);
LuaLib.lua_pushnumber (luaState, d);
} else if (o is char) {
double d = (char)o;
LuaLib.lua_pushnumber (luaState, d);
} else if (o is string) {
string str = (string)o;
LuaLib.lua_pushstring (luaState, str);
} else if (o is bool) {
bool b = (bool)o;
LuaLib.lua_pushboolean (luaState, b);
} else if (IsILua (o))
(((ILuaGeneratedType)o).LuaInterfaceGetLuaTable ()).push (luaState);
else if (o is LuaTable)
((LuaTable)o).push (luaState);
else if (o is LuaCore.lua_CFunction)
pushFunction (luaState, (LuaCore.lua_CFunction)o);
else if (o is LuaFunction)
((LuaFunction)o).push (luaState);
else
pushObject (luaState, o, "luaNet_metatable");
}
/*
* Pushes the entire array into the Lua stack and returns the number
* of elements pushed.
*/
internal int returnValues (LuaCore.lua_State luaState, object[] returnValues)
{
if (LuaLib.lua_checkstack (luaState, returnValues.Length + 5)) {
for (int i = 0; i < returnValues.Length; i++)
push (luaState, returnValues [i]);
return returnValues.Length;
} else
return 0;
}
/*
* Pushes a type reference into the stack
*/
internal void pushType (LuaCore.lua_State luaState, Type t)
{
pushObject (luaState, new ProxyType (t), "luaNet_class");
}
/*
* Pushes a delegate into the stack
*/
internal void pushFunction (LuaCore.lua_State luaState, LuaCore.lua_CFunction func)
{
pushObject (luaState, func, "luaNet_function");
}
private static int getConstructorSignature (LuaCore.lua_State luaState)
{
var translator = ObjectTranslatorPool.Instance.Find (luaState);
return translator.getConstructorSignatureInternal (luaState);
}
private int getConstructorSignatureInternal (LuaCore.lua_State luaState)
{
IReflect klass = null;
int udata = LuaLib.luanet_checkudata (luaState, 1, "luaNet_class");
if (udata != -1)
klass = (IReflect)objects [udata];
if (klass.IsNull ())
throwError (luaState, "get_constructor_bysig: first arg is invalid type reference");
var signature = new Type[LuaLib.lua_gettop (luaState) - 1];
for (int i = 0; i < signature.Length; i++)
signature [i] = FindType (LuaLib.lua_tostring (luaState, i + 2).ToString ());
try {
ConstructorInfo constructor = klass.UnderlyingSystemType.GetConstructor (signature);
pushFunction (luaState, new LuaCore.lua_CFunction ((new LuaMethodWrapper (this, null, klass, constructor)).invokeFunction));
} catch (Exception e) {
throwError (luaState, e);
LuaLib.lua_pushnil (luaState);
}
return 1;
}
private int getMethodSignatureInternal (LuaCore.lua_State luaState)
{
IReflect klass;
object target;
int udata = LuaLib.luanet_checkudata (luaState, 1, "luaNet_class");
if (udata != -1) {
klass = (IReflect)objects [udata];
target = null;
} else {
target = getRawNetObject (luaState, 1);
if (target.IsNull ()) {
throwError (luaState, "get_method_bysig: first arg is not type or object reference");
LuaLib.lua_pushnil (luaState);
return 1;
}
klass = target.GetType ();
}
string methodName = LuaLib.lua_tostring (luaState, 2).ToString ();
var signature = new Type[LuaLib.lua_gettop (luaState) - 2];
for (int i = 0; i < signature.Length; i++)
signature [i] = FindType (LuaLib.lua_tostring (luaState, i + 3).ToString ());
try {
//CP: Added ignore case
var method = klass.GetMethod (methodName, BindingFlags.Public | BindingFlags.Static |
BindingFlags.Instance | BindingFlags.FlattenHierarchy | BindingFlags.IgnoreCase, null, signature, null);
pushFunction (luaState, new LuaCore.lua_CFunction ((new LuaMethodWrapper (this, target, klass, method)).invokeFunction));
} catch (Exception e) {
throwError (luaState, e);
LuaLib.lua_pushnil (luaState);
}
return 1;
}
private int unregisterTableInternal (LuaCore.lua_State luaState)
{
try {
if (LuaLib.lua_getmetatable (luaState, 1) != 0) {
LuaLib.lua_pushstring (luaState, "__index");
LuaLib.lua_gettable (luaState, -2);
object obj = getRawNetObject (luaState, -1);
if (obj.IsNull ())
throwError (luaState, "unregister_table: arg is not valid table");
var luaTableField = obj.GetType ().GetField ("__luaInterface_luaTable");
if (luaTableField.IsNull ())
throwError (luaState, "unregister_table: arg is not valid table");
luaTableField.SetValue (obj, null);
LuaLib.lua_pushnil (luaState);
LuaLib.lua_setmetatable (luaState, 1);
LuaLib.lua_pushstring (luaState, "base");
LuaLib.lua_pushnil (luaState);
LuaLib.lua_settable (luaState, 1);
} else
throwError (luaState, "unregister_table: arg is not valid table");
} catch (Exception e) {
throwError (luaState, e.Message);
}
return 0;
}
private static int unregisterTable (LuaCore.lua_State luaState)
{
var translator = ObjectTranslatorPool.Instance.Find (luaState);
return translator.unregisterTableInternal (luaState);
}
/*
* Gets the CLR object in the index positon of the Lua stack. Returns
* delegates as Lua functions.
*/
internal object getNetObject (LuaCore.lua_State luaState, int index)
{
int idx = LuaLib.luanet_tonetobject (luaState, index);
return idx != -1 ? objects [idx] : null;
}
/*
* Pushes a CLR object into the Lua stack as an userdata
* with the provided metatable
*/
internal void pushObject (LuaCore.lua_State luaState, object o, string metatable)
{
int index = -1;
// Pushes nil
if (o.IsNull ()) {
LuaLib.lua_pushnil (luaState);
return;
}
// Object already in the list of Lua objects? Push the stored reference.
bool found = objectsBackMap.TryGetValue (o, out index);
if (found) {
LuaLib.luaL_getmetatable (luaState, "luaNet_objects");
LuaLib.lua_rawgeti (luaState, -1, index);
// Note: starting with lua5.1 the garbage collector may remove weak reference items (such as our luaNet_objects values) when the initial GC sweep
// occurs, but the actual call of the __gc finalizer for that object may not happen until a little while later. During that window we might call
// this routine and find the element missing from luaNet_objects, but collectObject() has not yet been called. In that case, we go ahead and call collect
// object here
// did we find a non nil object in our table? if not, we need to call collect object
var type = LuaLib.lua_type (luaState, -1);
if (type != LuaTypes.Nil) {
LuaLib.lua_remove (luaState, -2); // drop the metatable - we're going to leave our object on the stack
return;
}
// MetaFunctions.dumpStack(this, luaState);
LuaLib.lua_remove (luaState, -1); // remove the nil object value
LuaLib.lua_remove (luaState, -1); // remove the metatable
collectObject (o, index); // Remove from both our tables and fall out to get a new ID
}
index = addObject (o);
pushNewObject (luaState, o, index, metatable);
}
/*
* Gets the CLR object in the index position of the Lua stack. Returns
* delegates as is.
*/
internal object getRawNetObject (LuaCore.lua_State luaState, int index)
{
int udata = LuaLib.luanet_rawnetobj (luaState, index);
return udata != -1 ? objects [udata] : null;
}
/*
* Pushes a new object into the Lua stack with the provided
* metatable
*/
private void pushNewObject (LuaCore.lua_State luaState, object o, int index, string metatable)
{
if (metatable == "luaNet_metatable") {
// Gets or creates the metatable for the object's type
LuaLib.luaL_getmetatable (luaState, o.GetType ().AssemblyQualifiedName);
if (LuaLib.lua_isnil (luaState, -1)) {
LuaLib.lua_settop (luaState, -2);
LuaLib.luaL_newmetatable (luaState, o.GetType ().AssemblyQualifiedName);
LuaLib.lua_pushstring (luaState, "cache");
LuaLib.lua_newtable (luaState);
LuaLib.lua_rawset (luaState, -3);
LuaLib.lua_pushlightuserdata (luaState, LuaLib.luanet_gettag ());
LuaLib.lua_pushnumber (luaState, 1);
LuaLib.lua_rawset (luaState, -3);
LuaLib.lua_pushstring (luaState, "__index");
LuaLib.lua_pushstring (luaState, "luaNet_indexfunction");
LuaLib.lua_rawget (luaState, (int)LuaIndexes.Registry);
LuaLib.lua_rawset (luaState, -3);
LuaLib.lua_pushstring (luaState, "__gc");
LuaLib.lua_pushstdcallcfunction (luaState, metaFunctions.gcFunction);
LuaLib.lua_rawset (luaState, -3);
LuaLib.lua_pushstring (luaState, "__tostring");
LuaLib.lua_pushstdcallcfunction (luaState, metaFunctions.toStringFunction);
LuaLib.lua_rawset (luaState, -3);
LuaLib.lua_pushstring (luaState, "__newindex");
LuaLib.lua_pushstdcallcfunction (luaState, metaFunctions.newindexFunction);
LuaLib.lua_rawset (luaState, -3);
}
} else
LuaLib.luaL_getmetatable (luaState, metatable);
// Stores the object index in the Lua list and pushes the
// index into the Lua stack
LuaLib.luaL_getmetatable (luaState, "luaNet_objects");
LuaLib.luanet_newudata (luaState, index);
LuaLib.lua_pushvalue (luaState, -3);
LuaLib.lua_remove (luaState, -4);
LuaLib.lua_setmetatable (luaState, -2);
LuaLib.lua_pushvalue (luaState, -1);
LuaLib.lua_rawseti (luaState, -3, index);
LuaLib.lua_remove (luaState, -2);
}
/*
* Gets the values from the provided index to
* the top of the stack and returns them in an array.
*/
internal object[] popValues (LuaCore.lua_State luaState, int oldTop)
{
int newTop = LuaLib.lua_gettop (luaState);
if (oldTop == newTop)
return null;
else {
var returnValues = new List<object> ();
for (int i = oldTop+1; i <= newTop; i++)
returnValues.Add (getObject (luaState, i));
LuaLib.lua_settop (luaState, oldTop);
return returnValues.ToArray ();
}
}
/*
* Gets an object from the Lua stack with the desired type, if it matches, otherwise
* returns null.
*/
internal object getAsType (LuaCore.lua_State luaState, int stackPos, Type paramType)
{
var extractor = typeChecker.checkType (luaState, stackPos, paramType);
return !extractor.IsNull () ? extractor (luaState, stackPos) : null;
}
/*
* Gets the values from the provided index to
* the top of the stack and returns them in an array, casting
* them to the provided types.
*/
internal object[] popValues (LuaCore.lua_State luaState, int oldTop, Type[] popTypes)
{
int newTop = LuaLib.lua_gettop (luaState);
if (oldTop == newTop)
return null;
else {
int iTypes;
var returnValues = new List<object> ();
if (popTypes [0] == typeof(void))
iTypes = 1;
else
iTypes = 0;
for (int i = oldTop+1; i <= newTop; i++) {
returnValues.Add (getAsType (luaState, i, popTypes [iTypes]));
iTypes++;
}
LuaLib.lua_settop (luaState, oldTop);
return returnValues.ToArray ();
}
}
/*
* Gets an object from the Lua stack according to its Lua type.
*/
internal object getObject (LuaCore.lua_State luaState, int index)
{
var type = LuaLib.lua_type (luaState, index);
switch (type) {
case LuaTypes.Number:
{
return LuaLib.lua_tonumber (luaState, index);
}
case LuaTypes.String:
{
return LuaLib.lua_tostring (luaState, index);
}
case LuaTypes.Boolean:
{
return LuaLib.lua_toboolean (luaState, index);
}
case LuaTypes.Table:
{
return getTable (luaState, index);
}
case LuaTypes.Function:
{
return getFunction (luaState, index);
}
case LuaTypes.UserData:
{
int udata = LuaLib.luanet_tonetobject (luaState, index);
return udata != -1 ? objects [udata] : getUserData (luaState, index);
}
default:
return null;
}
}
/*
* Checks if the method matches the arguments in the Lua stack, getting
* the arguments if it does.
*/
internal bool matchParameters (LuaCore.lua_State luaState, MethodBase method, ref MethodCache methodCache)
{
return metaFunctions.matchParameters (luaState, method, ref methodCache);
}
/*
* Gets the table in the index positon of the Lua stack.
*/
internal LuaTable getTable (LuaCore.lua_State luaState, int index)
{
LuaLib.lua_pushvalue (luaState, index);
return new LuaTable (LuaLib.lua_ref (luaState, 1), interpreter);
}
private void DebugHookCallbackInternal (LuaCore.lua_State luaState, LuaCore.lua_Debug luaDebug)
{
try {
var temp = DebugHook;
if (!temp.IsNull ())
temp (this, new DebugHookEventArgs (luaDebug));
} catch (Exception ex) {
OnHookException (new HookExceptionEventArgs (ex));
}
}
/*
* Gets the userdata in the index positon of the Lua stack.
*/
internal LuaUserData getUserData (LuaCore.lua_State luaState, int index)
{
LuaLib.lua_pushvalue (luaState, index);
return new LuaUserData (LuaLib.lua_ref (luaState, 1), interpreter);
}
/*
* CAUTION: NLua.Lua instances can't share the same lua state!
*/
public Lua (LuaCore.lua_State lState)
{
LuaLib.lua_pushstring (lState, "LUAINTERFACE LOADED");
LuaLib.lua_gettable (lState, (int)LuaIndexes.Registry);
if (LuaLib.lua_toboolean (lState, -1)) {
LuaLib.lua_settop (lState, -2);
throw new LuaException ("There is already a NLua.Lua instance associated with this Lua state");
} else {
LuaLib.lua_settop (lState, -2);
LuaLib.lua_pushstring (lState, "LUAINTERFACE LOADED");
LuaLib.lua_pushboolean (lState, true);
LuaLib.lua_settable (lState, (int)LuaIndexes.Registry);
luaState = lState;
LuaLib.lua_pushvalue (lState, (int)LuaIndexes.Globals);
LuaLib.lua_getglobal (lState, "luanet");
LuaLib.lua_pushstring (lState, "getmetatable");
LuaLib.lua_getglobal (lState, "getmetatable");
LuaLib.lua_settable (lState, -3);
LuaLib.lua_replace (lState, (int)LuaIndexes.Globals);
translator = new ObjectTranslator (this, luaState);
ObjectTranslatorPool.Instance.Add (luaState, translator);
LuaLib.lua_replace (lState, (int)LuaIndexes.Globals);
LuaLib.luaL_dostring (lState, Lua.init_luanet); // steffenj: lua_dostring renamed to luaL_dostring
}
_StatePassed = true;
}
/*
* Gets the function in the index positon of the Lua stack.
*/
internal LuaFunction getFunction (LuaCore.lua_State luaState, int index)
{
LuaLib.lua_pushvalue (luaState, index);
return new LuaFunction (LuaLib.lua_ref (luaState, 1), interpreter);
}
/// <summary>
/// Sets local (see lua docs)
/// </summary>
/// <param name = "luaDebug">lua debug structure</param>
/// <param name = "n">see lua docs</param>
/// <returns>see lua docs</returns>
/// <author>Reinhard Ostermeier</author>
public string SetLocal (LuaCore.lua_Debug luaDebug, int n)
{
return LuaCore.lua_setlocal (luaState, luaDebug, n).ToString ();
}
private int importTypeInternal (LuaCore.lua_State luaState)
{
string className = LuaLib.lua_tostring (luaState, 1).ToString ();
var klass = FindType (className);
if (!klass.IsNull ())
pushType (luaState, klass);
else
LuaLib.lua_pushnil (luaState);
return 1;
}
