/*
* Creates a new table as a global variable or as a field
* inside an existing table
*/
public void NewTable(string fullPath)
{
string[] path = fullPath.Split(new char[] { '.' });
int oldTop = LuaLib.lua_gettop(luaState);
if (path.Length == 1)
{
LuaLib.lua_newtable(luaState);
LuaLib.lua_setglobal(luaState, fullPath);
}
else
{
LuaLib.lua_getglobal(luaState, path[0]);
for (int i = 1; i < path.Length - 1; i++)
{
LuaLib.lua_pushstring(luaState, path[i]);
LuaLib.lua_gettable(luaState, -2);
}
LuaLib.lua_pushstring(luaState, path[path.Length - 1]);
LuaLib.lua_newtable(luaState);
LuaLib.lua_settable(luaState, -3);
}
LuaLib.lua_settop(luaState, oldTop);
}
/*
* Registers the indexing function of CLR objects
* passed to Lua
*/
private void createIndexingMetaFunction(LuaCore.lua_State luaState)
{
LuaLib.lua_pushstring(luaState, "luaNet_indexfunction");
LuaLib.luaL_dostring(luaState, MetaFunctions.luaIndexFunction); // steffenj: lua_dostring renamed to luaL_dostring
//LuaLib.lua_pushstdcallcfunction(luaState, indexFunction);
LuaLib.lua_rawset(luaState, (int)LuaIndexes.Registry);
}
/*
* CAUTION: LuaInterface.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 LuaInterface.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);
LuaLib.lua_replace(lState, (int)LuaIndexes.Globals);
LuaLib.luaL_dostring(lState, Lua.init_luanet); // steffenj: lua_dostring renamed to luaL_dostring
}
_StatePassed = true;
}
public Lua()
{
luaState = LuaLib.luaL_newstate(); // steffenj: Lua 5.1.1 API change (lua_open is gone)
//LuaLib.luaopen_base(luaState); // steffenj: luaopen_* no longer used
LuaLib.luaL_openlibs(luaState); // steffenj: Lua 5.1.1 API change (luaopen_base is gone, just open all libs right here)
LuaLib.lua_pushstring(luaState, "LUAINTERFACE LOADED");
LuaLib.lua_pushboolean(luaState, true);
LuaLib.lua_settable(luaState, (int)LuaIndexes.Registry);
LuaLib.lua_newtable(luaState);
LuaLib.lua_setglobal(luaState, "luanet");
LuaLib.lua_pushvalue(luaState, (int)LuaIndexes.Globals);
LuaLib.lua_getglobal(luaState, "luanet");
LuaLib.lua_pushstring(luaState, "getmetatable");
LuaLib.lua_getglobal(luaState, "getmetatable");
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_replace(luaState, (int)LuaIndexes.Globals);
translator = new ObjectTranslator(this, luaState);
LuaLib.lua_replace(luaState, (int)LuaIndexes.Globals);
LuaLib.luaL_dostring(luaState, Lua.init_luanet); // steffenj: lua_dostring renamed to luaL_dostring
// We need to keep this in a managed reference so the delegate doesn't get garbage collected
panicCallback = new LuaCore.lua_CFunction(PanicCallback);
LuaLib.lua_atpanic(luaState, panicCallback);
//LuaLib.lua_atlock(luaState, lockCallback = new LuaCore.lua_CFunction(LockCallback));
//LuaLib.lua_atunlock(luaState, unlockCallback = new LuaCore.lua_CFunction(UnlockCallback));
}
/*
* Sets up the list of objects in the Lua side
*/
private void createLuaObjectList(LuaCore.lua_State luaState)
{
LuaLib.lua_pushstring(luaState, "luaNet_objects");
LuaLib.lua_newtable(luaState);
LuaLib.lua_newtable(luaState);
LuaLib.lua_pushstring(luaState, "__mode");
LuaLib.lua_pushstring(luaState, "v");
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_setmetatable(luaState, -2);
LuaLib.lua_settable(luaState, (int)LuaIndexes.Registry);
}
/*
* Creates the metatable for delegates
*/
private void createFunctionMetatable(LuaCore.lua_State luaState)
{
LuaLib.luaL_newmetatable(luaState, "luaNet_function");
LuaLib.lua_pushstring(luaState, "__gc");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.gcFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__call");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.execDelegateFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_settop(luaState, -2);
}
/*
* Navigates a table to set the value of one of its fields
*/
internal void setObject(string[] remainingPath, object val)
{
for (int i = 0; i < remainingPath.Length - 1; i++)
{
LuaLib.lua_pushstring(luaState, remainingPath[i]);
LuaLib.lua_gettable(luaState, -2);
}
LuaLib.lua_pushstring(luaState, remainingPath[remainingPath.Length - 1]);
translator.push(luaState, val);
LuaLib.lua_settable(luaState, -3);
}
/*
* Gets a field of the table corresponding to the provided reference
* using rawget (do not use metatables)
*/
internal object rawGetObject(int reference, string field)
{
int oldTop = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, reference);
LuaLib.lua_pushstring(luaState, field);
LuaLib.lua_rawget(luaState, -2);
object obj = translator.getObject(luaState, -1);
LuaLib.lua_settop(luaState, oldTop);
return(obj);
}
/*
* 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).__luaInterface_getLuaTable()).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");
}
}
/*
* Implementation of make_object. Registers a table (first
* argument in the stack) as an object subclassing the
* type passed as second argument in the stack.
*/
private int registerTable(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);
}
/*
* 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);
}
/*
* Creates the metatable for superclasses (the base
* field of registered tables)
*/
private void createBaseClassMetatable(LuaCore.lua_State luaState)
{
LuaLib.luaL_newmetatable(luaState, "luaNet_searchbase");
LuaLib.lua_pushstring(luaState, "__gc");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.gcFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__tostring");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.toStringFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__index");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.baseIndexFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__newindex");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.newindexFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_settop(luaState, -2);
}
/*
* Navigates a table in the top of the stack, returning
* the value of the specified field
*/
internal object getObject(string[] remainingPath)
{
object returnValue = null;
for (int i = 0; i < remainingPath.Length; i++)
{
LuaLib.lua_pushstring(luaState, remainingPath[i]);
LuaLib.lua_gettable(luaState, -2);
returnValue = translator.getObject(luaState, -1);
if (returnValue.IsNull())
{
break;
}
}
return(returnValue);
}
/*
* Creates the metatable for type references
*/
private void createClassMetatable(LuaCore.lua_State luaState)
{
LuaLib.luaL_newmetatable(luaState, "luaNet_class");
LuaLib.lua_pushstring(luaState, "__gc");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.gcFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__tostring");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.toStringFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__index");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.classIndexFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__newindex");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.classNewindexFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_pushstring(luaState, "__call");
LuaLib.lua_pushstdcallcfunction(luaState, metaFunctions.callConstructorFunction);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_settop(luaState, -2);
}
/*
* Implementation of free_object. Clears the metatable and the
* base field, freeing the created object for garbage-collection
*/
private int unregisterTable(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);
}
