/*
* Implementation of get_constructor_bysig. Returns nil
* if no matching constructor is found.
*/
private int getConstructorSignature(KopiLua.LuaState luaState)
{
IReflect klass = null;
int udata = LuaDll.luanet_checkudata(luaState, 1, "luaNet_class");
if (udata != -1)
{
klass = (IReflect)objects[udata];
}
if (klass == null)
{
throwError(luaState, "get_constructor_bysig: first arg is invalid type reference");
}
Type[] signature = new Type[LuaDll.lua_gettop(luaState) - 1];
for (int i = 0; i < signature.Length; i++)
{
signature[i] = FindType(LuaDll.lua_tostring(luaState, i + 2));
}
try
{
ConstructorInfo constructor = klass.UnderlyingSystemType.GetConstructor(signature);
pushFunction(luaState, new KopiLua.LuaNativeFunction((new LuaMethodWrapper(this, null, klass, constructor)).call));
}
catch (Exception e)
{
throwError(luaState, e);
LuaDll.lua_pushnil(luaState);
}
return(1);
}
public void lua_registerTest()
{
bool wasCalled = false;
LuaDll.lua_CFunction testFunctionDelegate = delegate(lua_State state)
{
wasCalled = true;
LuaDll.lua_pushstring(state, "Success!");
return(1);
};
// Create a new state
var L = LuaDll.luaL_newstate();
// Register the given function by name
LuaDll.lua_register(L, "test_function", testFunctionDelegate);
// Call the function by name
var result = LuaDll.luaL_dostring(L, "return test_function()");
Assert.AreEqual(0, result);
Assert.IsTrue(wasCalled);
// Check that the function returned the same string.
var resultIndex = LuaDll.lua_gettop(L);
var resultString = LuaDll.lua_tostring(L, resultIndex);
Assert.AreEqual("Success!", resultString);
}
/*
* __index metafunction of base classes (the base field of Lua tables).
* Adds a prefix to the method name to call the base version of the method.
*/
private int getBaseMethod(KopiLua.LuaState luaState)
{
object obj = translator.getRawNetObject(luaState, 1);
if (obj == null)
{
translator.throwError(luaState, "trying to index an invalid object reference");
LuaDll.lua_pushnil(luaState);
LuaDll.lua_pushboolean(luaState, false);
return(2);
}
string methodName = LuaDll.lua_tostring(luaState, 2);
if (methodName == null)
{
LuaDll.lua_pushnil(luaState);
LuaDll.lua_pushboolean(luaState, false);
return(2);
}
getMember(luaState, obj.GetType(), obj, "__luaInterface_base_" + methodName, BindingFlags.Instance);
LuaDll.lua_settop(luaState, -2);
if (LuaDll.lua_type(luaState, -1) == LuaTypes.LUA_TNIL)
{
LuaDll.lua_settop(luaState, -2);
return(getMember(luaState, obj.GetType(), obj, methodName, BindingFlags.Instance));
}
LuaDll.lua_pushboolean(luaState, false);
return(2);
}
public Lua()
{
luaState = LuaDll.luaL_newstate(); // steffenj: Lua 5.1.1 API change (lua_open is gone)
//LuaDLL.luaopen_base(luaState); // steffenj: luaopen_* no longer used
LuaDll.luaL_openlibs(luaState); // steffenj: Lua 5.1.1 API change (luaopen_base is gone, just open all libs right here)
LuaDll.lua_pushstring(luaState, "LUAINTERFACE LOADED");
LuaDll.lua_pushboolean(luaState, true);
LuaDll.lua_settable(luaState, (int)LuaIndexes.LUA_REGISTRYINDEX);
LuaDll.lua_newtable(luaState);
LuaDll.lua_setglobal(luaState, "luanet");
LuaDll.lua_pushvalue(luaState, (int)LuaIndexes.LUA_GLOBALSINDEX);
LuaDll.lua_getglobal(luaState, "luanet");
LuaDll.lua_pushstring(luaState, "getmetatable");
LuaDll.lua_getglobal(luaState, "getmetatable");
LuaDll.lua_settable(luaState, -3);
LuaDll.lua_replace(luaState, (int)LuaIndexes.LUA_GLOBALSINDEX);
translator = new ObjectTranslator(this, luaState);
LuaDll.lua_replace(luaState, (int)LuaIndexes.LUA_GLOBALSINDEX);
LuaDll.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 KopiLua.LuaNativeFunction(PanicCallback);
LuaDll.lua_atpanic(luaState, panicCallback);
// LuaDLL.lua_atlock(luaState, lockCallback = new KopiLua.LuaNativeFunction(LockCallback));
// LuaDLL.lua_atunlock(luaState, unlockCallback = new KopiLua.LuaNativeFunction(UnlockCallback));
}
/*
* 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(KopiLua.LuaState luaState, int oldTop, Type[] popTypes)
{
int newTop = LuaDll.lua_gettop(luaState);
if (oldTop == newTop)
{
return(null);
}
else
{
int iTypes;
ArrayList returnValues = new ArrayList();
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++;
}
LuaDll.lua_settop(luaState, oldTop);
return(returnValues.ToArray());
}
}
/*
* __index metafunction of type references, works on static members.
*/
private int getClassMethod(KopiLua.LuaState luaState)
{
IReflect klass;
object obj = translator.getRawNetObject(luaState, 1);
if (obj == null || !(obj is IReflect))
{
translator.throwError(luaState, "trying to index an invalid type reference");
LuaDll.lua_pushnil(luaState);
return(1);
}
else
{
klass = (IReflect)obj;
}
if (LuaDll.lua_isnumber(luaState, 2))
{
int size = (int)LuaDll.lua_tonumber(luaState, 2);
translator.push(luaState, Array.CreateInstance(klass.UnderlyingSystemType, size));
return(1);
}
else
{
string methodName = LuaDll.lua_tostring(luaState, 2);
if (methodName == null)
{
LuaDll.lua_pushnil(luaState);
return(1);
}
else
{
return(getMember(luaState, klass, null, methodName, BindingFlags.FlattenHierarchy | BindingFlags.Static));
}
}
}
/*
* Calls the object as a function with the provided arguments and
* casting returned values to the types in returnTypes before returning
* them in an array
*/
internal object[] callFunction(object function, object[] args, Type[] returnTypes)
{
int nArgs = 0;
int oldTop = LuaDll.lua_gettop(luaState);
if (!LuaDll.lua_checkstack(luaState, args.Length + 6))
{
throw new LuaException("Lua stack overflow");
}
translator.push(luaState, function);
if (args != null)
{
nArgs = args.Length;
for (int i = 0; i < args.Length; i++)
{
translator.push(luaState, args[i]);
}
}
int error = LuaDll.lua_pcall(luaState, nArgs, -1, 0);
if (error != 0)
{
ThrowExceptionFromError(oldTop);
}
if (returnTypes != null)
{
return(translator.popValues(luaState, oldTop, returnTypes));
}
else
{
return(translator.popValues(luaState, oldTop));
}
}
/*
* CAUTION: LuaInterface.Lua instances can't share the same lua state!
*/
public Lua(KopiLua.LuaState lState)
{
LuaDll.lua_pushstring(lState, "LUAINTERFACE LOADED");
LuaDll.lua_gettable(lState, (int)LuaIndexes.LUA_REGISTRYINDEX);
if (LuaDll.lua_toboolean(lState, -1))
{
LuaDll.lua_settop(lState, -2);
throw new LuaException("There is already a LuaInterface.Lua instance associated with this Lua state");
}
else
{
LuaDll.lua_settop(lState, -2);
LuaDll.lua_pushstring(lState, "LUAINTERFACE LOADED");
LuaDll.lua_pushboolean(lState, true);
LuaDll.lua_settable(lState, (int)LuaIndexes.LUA_REGISTRYINDEX);
this.luaState = lState;
LuaDll.lua_pushvalue(lState, (int)LuaIndexes.LUA_GLOBALSINDEX);
LuaDll.lua_getglobal(lState, "luanet");
LuaDll.lua_pushstring(lState, "getmetatable");
LuaDll.lua_getglobal(lState, "getmetatable");
LuaDll.lua_settable(lState, -3);
LuaDll.lua_replace(lState, (int)LuaIndexes.LUA_GLOBALSINDEX);
translator = new ObjectTranslator(this, this.luaState);
LuaDll.lua_replace(lState, (int)LuaIndexes.LUA_GLOBALSINDEX);
LuaDll.luaL_dostring(lState, Lua.init_luanet); // steffenj: lua_dostring renamed to luaL_dostring
}
}
/*
* Registers the indexing function of CLR objects
* passed to Lua
*/
private void createIndexingMetaFunction(KopiLua.LuaState luaState)
{
LuaDll.lua_pushstring(luaState, "luaNet_indexfunction");
LuaDll.luaL_dostring(luaState, MetaFunctions.luaIndexFunction); // steffenj: lua_dostring renamed to luaL_dostring
//LuaDLL.lua_pushstdcallcfunction(luaState,indexFunction);
LuaDll.lua_rawset(luaState, (int)LuaIndexes.LUA_REGISTRYINDEX);
}
/*
* Sets a field of the table or userdata corresponding the the provided reference
* to the provided value
*/
internal void setObject(int reference, string field, object val)
{
int oldTop = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, reference);
setObject(field.Split(new char[] { '.' }), val);
LuaDll.lua_settop(luaState, oldTop);
}
private object getAsUlong(KopiLua.LuaState luaState, int stackPos)
{
ulong retVal = (ulong)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
private object getAsByte(KopiLua.LuaState luaState, int stackPos)
{
byte retVal = (byte)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
private object getAsString(KopiLua.LuaState luaState, int stackPos)
{
string retVal = LuaDll.lua_tostring(luaState, stackPos);
if (retVal == "" && !LuaDll.lua_isstring(luaState, stackPos))
{
return(null);
}
return(retVal);
}
private object getAsFloat(KopiLua.LuaState luaState, int stackPos)
{
float retVal = (float)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
/*
* Gets a field of the table or userdata corresponding to the provided reference
*/
internal object getObject(int reference, string field)
{
int oldTop = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, reference);
object returnValue = getObject(field.Split(new char[] { '.' }));
LuaDll.lua_settop(luaState, oldTop);
return(returnValue);
}
private object getAsChar(KopiLua.LuaState luaState, int stackPos)
{
char retVal = (char)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
/*
* Sets a numeric field of the table or userdata corresponding the the provided reference
* to the provided value
*/
internal void setObject(int reference, object field, object val)
{
int oldTop = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, reference);
translator.push(luaState, field);
translator.push(luaState, val);
LuaDll.lua_settable(luaState, -3);
LuaDll.lua_settop(luaState, oldTop);
}
private object getAsDecimal(KopiLua.LuaState luaState, int stackPos)
{
decimal retVal = (decimal)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
private object getAsDouble(KopiLua.LuaState luaState, int stackPos)
{
double retVal = LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
private object getAsUshort(KopiLua.Lua.lua_State luaState, int stackPos)
{
ushort retVal = (ushort)LuaDll.lua_tonumber(luaState, stackPos);
if (retVal == 0 && !LuaDll.lua_isnumber(luaState, stackPos))
{
return(null);
}
return(retVal);
}
/*
* Gets the CLR object in the index positon of the Lua stack. Returns
* delegates as is.
*/
internal object getRawNetObject(KopiLua.LuaState luaState, int index)
{
int udata = LuaDll.luanet_rawnetobj(luaState, index);
if (udata != -1)
{
return(objects[udata]);
}
return(null);
}
/*
* 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++)
{
LuaDll.lua_pushstring(luaState, remainingPath[i]);
LuaDll.lua_gettable(luaState, -2);
}
LuaDll.lua_pushstring(luaState, remainingPath[remainingPath.Length - 1]);
translator.push(luaState, val);
LuaDll.lua_settable(luaState, -3);
}
/*
* Compares the two values referenced by ref1 and ref2 for equality
*/
internal bool compareRef(int ref1, int ref2)
{
int top = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, ref1);
LuaDll.lua_getref(luaState, ref2);
int equal = LuaDll.lua_equal(luaState, -1, -2);
LuaDll.lua_settop(luaState, top);
return(equal != 0);
}
/*
* Sets up the list of objects in the Lua side
*/
private void createLuaObjectList(KopiLua.LuaState luaState)
{
LuaDll.lua_pushstring(luaState, "luaNet_objects");
LuaDll.lua_newtable(luaState);
LuaDll.lua_newtable(luaState);
LuaDll.lua_pushstring(luaState, "__mode");
LuaDll.lua_pushstring(luaState, "v");
LuaDll.lua_settable(luaState, -3);
LuaDll.lua_setmetatable(luaState, -2);
LuaDll.lua_settable(luaState, (int)LuaIndexes.LUA_REGISTRYINDEX);
}
/*
* Pushes the function into the Lua stack
*/
internal void push(KopiLua.LuaState luaState)
{
if (reference != 0)
{
LuaDll.lua_getref(luaState, reference);
}
else
{
interpreter.pushCSFunction(function);
}
}
/*
* Creates the metatable for delegates
*/
private void createFunctionMetatable(KopiLua.LuaState luaState)
{
LuaDll.luaL_newmetatable(luaState, "luaNet_function");
LuaDll.lua_pushstring(luaState, "__gc");
LuaDll.lua_pushstdcallcfunction(luaState, metaFunctions.gcFunction);
LuaDll.lua_settable(luaState, -3);
LuaDll.lua_pushstring(luaState, "__call");
LuaDll.lua_pushstdcallcfunction(luaState, metaFunctions.execDelegateFunction);
LuaDll.lua_settable(luaState, -3);
LuaDll.lua_settop(luaState, -2);
}
/*
* 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 = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, reference);
LuaDll.lua_pushstring(luaState, field);
LuaDll.lua_rawget(luaState, -2);
object obj = translator.getObject(luaState, -1);
LuaDll.lua_settop(luaState, oldTop);
return(obj);
}
/*
* Gets a numeric field of the table or userdata corresponding the the provided reference
*/
internal object getObject(int reference, object field)
{
int oldTop = LuaDll.lua_gettop(luaState);
LuaDll.lua_getref(luaState, reference);
translator.push(luaState, field);
LuaDll.lua_gettable(luaState, -2);
object returnValue = translator.getObject(luaState, -1);
LuaDll.lua_settop(luaState, oldTop);
return(returnValue);
}
/*
* Gets the CLR object in the index positon of the Lua stack. Returns
* delegates as Lua functions.
*/
internal object getNetObject(KopiLua.LuaState luaState, int index)
{
int idx = LuaDll.luanet_tonetobject(luaState, index);
if (idx != -1)
{
return(objects[idx]);
}
else
{
return(null);
}
}
/*
* __tostring metafunction of CLR objects.
*/
private int toString(KopiLua.LuaState luaState)
{
object obj = translator.getRawNetObject(luaState, 1);
if (obj != null)
{
translator.push(luaState, obj.ToString() + ": " + obj.GetHashCode());
}
else
{
LuaDll.lua_pushnil(luaState);
}
return(1);
}
