/*
* Implementation of get_constructor_bysig. Returns nil
* if no matching constructor is found.
*/
private int getConstructorSignature(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)).call));
}
catch (Exception e)
{
throwError(luaState, e);
LuaLib.lua_pushnil(luaState);
}
return(1);
}
/*
* 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);
}
/*
* 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 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++;
}
LuaLib.lua_settop(luaState, oldTop);
return(returnValues.ToArray());
}
}
/*
* Excutes a Lua file and returns all the chunk's return
* values in an array
*/
public object[] DoFile(string fileName)
{
int oldTop = LuaLib.lua_gettop(luaState);
if (LuaLib.luaL_loadfile(luaState, fileName) == 0)
{
executing = true;
try
{
if (LuaLib.lua_pcall(luaState, 0, -1, 0) == 0)
{
return(translator.popValues(luaState, oldTop));
}
else
{
ThrowExceptionFromError(oldTop);
}
}
finally
{
executing = false;
}
}
else
{
ThrowExceptionFromError(oldTop);
}
return(null); // Never reached - keeps compiler happy
}
/*
* 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 = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, reference);
setObject(field.Split(new char[] { '.' }), val);
LuaLib.lua_settop(luaState, oldTop);
}
/*
* Indexer for global variables from the LuaInterpreter
* Supports navigation of tables by using . operator
*/
public object this[string fullPath]
{
get
{
object returnValue = null;
int oldTop = LuaLib.lua_gettop(luaState);
string[] path = fullPath.Split(new char[] { '.' });
LuaLib.lua_getglobal(luaState, path[0]);
returnValue = translator.getObject(luaState, -1);
if (path.Length > 1)
{
string[] remainingPath = new string[path.Length - 1];
Array.Copy(path, 1, remainingPath, 0, path.Length - 1);
returnValue = getObject(remainingPath);
}
LuaLib.lua_settop(luaState, oldTop);
return(returnValue);
}
set
{
int oldTop = LuaLib.lua_gettop(luaState);
string[] path = fullPath.Split(new char[] { '.' });
if (path.Length == 1)
{
translator.push(luaState, value);
LuaLib.lua_setglobal(luaState, fullPath);
}
else
{
LuaLib.lua_getglobal(luaState, path[0]);
string[] remainingPath = new string[path.Length - 1];
Array.Copy(path, 1, remainingPath, 0, path.Length - 1);
setObject(remainingPath, value);
}
LuaLib.lua_settop(luaState, oldTop);
// Globals auto-complete
if (value.IsNull())
{
// Remove now obsolete entries
globals.Remove(fullPath);
}
else
{
// Add new entries
if (!globals.Contains(fullPath))
{
registerGlobal(fullPath, value.GetType(), 0);
}
}
}
}
/*
* 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 = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, reference);
translator.push(luaState, field);
translator.push(luaState, val);
LuaLib.lua_settable(luaState, -3);
LuaLib.lua_settop(luaState, oldTop);
}
/*
* Gets a field of the table or userdata corresponding to the provided reference
*/
internal object getObject(int reference, string field)
{
int oldTop = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, reference);
object returnValue = getObject(field.Split(new char[] { '.' }));
LuaLib.lua_settop(luaState, oldTop);
return(returnValue);
}
/*
* Compares the two values referenced by ref1 and ref2 for equality
*/
internal bool compareRef(int ref1, int ref2)
{
int top = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, ref1);
LuaLib.lua_getref(luaState, ref2);
int equal = LuaLib.lua_equal(luaState, -1, -2);
LuaLib.lua_settop(luaState, top);
return(equal != 0);
}
/*
* Gets a numeric field of the table or userdata corresponding the the provided reference
*/
internal object getObject(int reference, object field)
{
int oldTop = LuaLib.lua_gettop(luaState);
LuaLib.lua_getref(luaState, reference);
translator.push(luaState, field);
LuaLib.lua_gettable(luaState, -2);
object returnValue = translator.getObject(luaState, -1);
LuaLib.lua_settop(luaState, oldTop);
return(returnValue);
}
/*
* 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);
}
/*
* Registers an object's method as a Lua function (global or table field)
* The method may have any signature
*/
public LuaFunction RegisterFunction(string path, object target, MethodBase function /*MethodInfo function*/) //CP: Fix for struct constructor by Alexander Kappner (link: http://luaforge.net/forum/forum.php?thread_id = 2859&forum_id = 145)
{
// We leave nothing on the stack when we are done
int oldTop = LuaLib.lua_gettop(luaState);
var wrapper = new LuaMethodWrapper(translator, target, function.DeclaringType, function);
translator.push(luaState, new LuaCore.lua_CFunction(wrapper.call));
this[path] = translator.getObject(luaState, -1);
var f = GetFunction(path);
LuaLib.lua_settop(luaState, oldTop);
return(f);
}
/// <summary>
///
/// </summary>
/// <param name = "fileName"></param>
/// <returns></returns>
public LuaFunction LoadFile(string fileName)
{
int oldTop = LuaLib.lua_gettop(luaState);
if (LuaLib.luaL_loadfile(luaState, fileName) != 0)
{
ThrowExceptionFromError(oldTop);
}
var result = translator.getFunction(luaState, -1);
translator.popValues(luaState, oldTop);
return(result);
}
/*
* Implementation of get_method_bysig. Returns nil
* if no matching method is not found.
*/
private int getMethodSignature(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)).call));
}
catch (Exception e)
{
throwError(luaState, e);
LuaLib.lua_pushnil(luaState);
}
return(1);
}
public ListDictionary GetTableDict(LuaTable table)
{
var dict = new ListDictionary();
int oldTop = LuaLib.lua_gettop(luaState);
translator.push(luaState, table);
LuaLib.lua_pushnil(luaState);
while (LuaLib.lua_next(luaState, -2) != 0)
{
dict[translator.getObject(luaState, -2)] = translator.getObject(luaState, -1);
LuaLib.lua_settop(luaState, -2);
}
LuaLib.lua_settop(luaState, oldTop);
return(dict);
}
/// <summary>
/// Debug tool to dump the lua stack
/// </summary>
/// FIXME, move somewhere else
public static void dumpStack(ObjectTranslator translator, LuaCore.lua_State luaState)
{
int depth = LuaLib.lua_gettop(luaState);
Debug.WriteLine("lua stack depth: " + depth);
for (int i = 1; i <= depth; i++)
{
var type = LuaLib.lua_type(luaState, i);
// we dump stacks when deep in calls, calling typename while the stack is in flux can fail sometimes, so manually check for key types
string typestr = (type == LuaTypes.Table) ? "table" : LuaLib.lua_typename(luaState, type);
string strrep = LuaLib.lua_tostring(luaState, i).ToString();
if (type == LuaTypes.UserData)
{
object obj = translator.getRawNetObject(luaState, i);
strrep = obj.ToString();
}
}
}
/*
* 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 ArrayList();
for (int i = oldTop + 1; i <= newTop; i++)
{
returnValues.Add(getObject(luaState, i));
}
LuaLib.lua_settop(luaState, oldTop);
return(returnValues.ToArray());
}
}
/*
* 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 = LuaLib.lua_gettop(luaState);
if (!LuaLib.lua_checkstack(luaState, args.Length + 6))
{
throw new LuaException("Lua stack overflow");
}
translator.push(luaState, function);
if (!args.IsNull())
{
nArgs = args.Length;
for (int i = 0; i < args.Length; i++)
{
translator.push(luaState, args[i]);
}
}
executing = true;
try
{
int error = LuaLib.lua_pcall(luaState, nArgs, -1, 0);
if (error != 0)
{
ThrowExceptionFromError(oldTop);
}
}
finally
{
executing = false;
}
return(!returnTypes.IsNull() ? translator.popValues(luaState, oldTop, returnTypes) : translator.popValues(luaState, oldTop));
}
/*
* Passes errors (argument e) to the Lua interpreter
*/
internal void throwError(LuaCore.lua_State luaState, object e)
{
// We use this to remove anything pushed by luaL_where
int oldTop = LuaLib.lua_gettop(luaState);
// Stack frame #1 is our C# wrapper, so not very interesting to the user
// Stack frame #2 must be the lua code that called us, so that's what we want to use
LuaLib.luaL_where(luaState, 1);
var curlev = popValues(luaState, oldTop);
// Determine the position in the script where the exception was triggered
string errLocation = string.Empty;
if (curlev.Length > 0)
{
errLocation = curlev[0].ToString();
}
string message = e as string;
if (!message.IsNull())
{
// Wrap Lua error (just a string) and store the error location
e = new LuaScriptException(message, errLocation);
}
else
{
var ex = e as Exception;
if (!ex.IsNull())
{
// Wrap generic .NET exception as an InnerException and store the error location
e = new LuaScriptException(ex, errLocation);
}
}
push(luaState, e);
LuaLib.lua_error(luaState);
}
/// <summary>
///
/// </summary>
/// <param name = "chunk"></param>
/// <param name = "name"></param>
/// <returns></returns>
public LuaFunction LoadString(string chunk, string name)
{
int oldTop = LuaLib.lua_gettop(luaState);
executing = true;
try
{
if (LuaLib.luaL_loadbuffer(luaState, chunk, name) != 0)
{
ThrowExceptionFromError(oldTop);
}
}
finally
{
executing = false;
}
var result = translator.getFunction(luaState, -1);
translator.popValues(luaState, oldTop);
return(result);
}
/*
* Matches a method against its arguments in the Lua stack. Returns
* if the match was succesful. It it was also returns the information
* necessary to invoke the method.
*/
internal bool matchParameters(LuaCore.lua_State luaState, MethodBase method, ref MethodCache methodCache)
{
ExtractValue extractValue;
bool isMethod = true;
var paramInfo = method.GetParameters();
int currentLuaParam = 1;
int nLuaParams = LuaLib.lua_gettop(luaState);
var paramList = new ArrayList();
var outList = new List <int>();
var argTypes = new List <MethodArgs>();
foreach (var currentNetParam in paramInfo)
{
if (!currentNetParam.IsIn && currentNetParam.IsOut) // Skips out params
{
outList.Add(paramList.Add(null));
}
else if (currentLuaParam > nLuaParams) // Adds optional parameters
{
if (currentNetParam.IsOptional)
{
paramList.Add(currentNetParam.DefaultValue);
}
else
{
isMethod = false;
break;
}
}
else if (_IsTypeCorrect(luaState, currentLuaParam, currentNetParam, out extractValue)) // Type checking
{
int index = paramList.Add(extractValue(luaState, currentLuaParam));
var methodArg = new MethodArgs();
methodArg.index = index;
methodArg.extractValue = extractValue;
argTypes.Add(methodArg);
if (currentNetParam.ParameterType.IsByRef)
{
outList.Add(index);
}
currentLuaParam++;
} // Type does not match, ignore if the parameter is optional
else if (_IsParamsArray(luaState, currentLuaParam, currentNetParam, out extractValue))
{
object luaParamValue = extractValue(luaState, currentLuaParam);
var paramArrayType = currentNetParam.ParameterType.GetElementType();
Array paramArray;
if (luaParamValue is LuaTable)
{
var table = (LuaTable)luaParamValue;
var tableEnumerator = table.GetEnumerator();
paramArray = Array.CreateInstance(paramArrayType, table.Values.Count);
tableEnumerator.Reset();
int paramArrayIndex = 0;
while (tableEnumerator.MoveNext())
{
paramArray.SetValue(Convert.ChangeType(tableEnumerator.Value, currentNetParam.ParameterType.GetElementType()), paramArrayIndex);
paramArrayIndex++;
}
}
else
{
paramArray = Array.CreateInstance(paramArrayType, 1);
paramArray.SetValue(luaParamValue, 0);
}
int index = paramList.Add(paramArray);
var methodArg = new MethodArgs();
methodArg.index = index;
methodArg.extractValue = extractValue;
methodArg.isParamsArray = true;
methodArg.paramsArrayType = paramArrayType;
argTypes.Add(methodArg);
currentLuaParam++;
}
else if (currentNetParam.IsOptional)
{
paramList.Add(currentNetParam.DefaultValue);
}
else // No match
{
isMethod = false;
break;
}
}
if (currentLuaParam != nLuaParams + 1) // Number of parameters does not match
{
isMethod = false;
}
if (isMethod)
{
methodCache.args = paramList.ToArray();
methodCache.cachedMethod = method;
methodCache.outList = outList.ToArray();
methodCache.argTypes = argTypes.ToArray();
}
return(isMethod);
}
/// <summary>
/// Pops a value from the lua stack.
/// </summary>
/// <returns>Returns the top value from the lua stack.</returns>
/// <author>Reinhard Ostermeier</author>
public object Pop()
{
int top = LuaLib.lua_gettop(luaState);
return(translator.popValues(luaState, top - 1)[0]);
}