protected void CopySimpleData(ScriptVar val)
{
data = val.data;
intData = val.intData;
doubleData = val.doubleData;
flags = (flags & ~Flags.VarTypeMask) | (val.flags & Flags.VarTypeMask);
}
public void ReplaceWith(ScriptVar newVar)
{
ScriptVar oldVar = Var;
Var = newVar.Ref();
oldVar.UnRef();
}
public void AddNativeProperty(string propertyDesc, ScriptCallbackCB callbackCB, object userData)
{
var oldLex = currentLexer;
currentLexer = new ScriptLex(propertyDesc);
var baseVar = Root;
var propName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
while (currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
currentLexer.Match((ScriptLex.LexTypes) '.');
var link = baseVar.FindChild(propName);
if (link == null)
{
link = baseVar.AddChild(propName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
propName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
}
var propVar = new ScriptVar();
callbackCB.Invoke(propVar, null);
currentLexer = oldLex;
baseVar.AddChild(propName, propVar);
}
public ScriptVarLink AddChild(string childName, ScriptVar child, bool readOnly = false)
{
if (IsUndefined)
{
flags = Flags.Object;
}
var c = child ?? new ScriptVar();
var link = new ScriptVarLink(c, childName, readOnly)
{
Owned = true
};
if (LastChild != null)
{
LastChild.Next = link;
link.Prev = LastChild;
LastChild = link;
}
else
{
FirstChild = link;
LastChild = link;
}
return(link);
}
protected void CopySimpleData(ScriptVar val)
{
_data = val._data;
_intData = val._intData;
_doubleData = val._doubleData;
_flags = (_flags & ~Flags.VarTypeMask) | (val._flags & Flags.VarTypeMask);
}
public ScriptVarLink AddChild(String childName, ScriptVar child)
{
if (IsUndefined)
{
_flags = Flags.Object;
}
ScriptVar c = child ?? new ScriptVar();
ScriptVarLink link = new ScriptVarLink(c, childName)
{
Owned = true
};
if (LastChild != null)
{
LastChild.Next = link;
link.Prev = LastChild;
LastChild = link;
}
else
{
FirstChild = link;
LastChild = link;
}
return(link);
}
public ScriptVarLink(ScriptVar var, String name)
{
Name = name;
Var = var.Ref();
Next = null;
Prev = null;
Owned = false;
}
public ScriptVarLink(ScriptVar var, string name, bool readOnly = false)
{
Name = name;
Var = var.Ref();
Next = null;
Prev = null;
Owned = false;
IsConst = readOnly;
}
public bool Equal(ScriptVar v)
{
bool res;
using (ScriptVar resV = MathsOp(v, ScriptLex.LexTypes.Equal))
{
res = resV.GetBool();
}
return(res);
}
private void CreateLink(ref ScriptVarLink link, ScriptVar res)
{
if (link == null || link.Owned)
{
link = new ScriptVarLink(res, null);
}
else
{
link.ReplaceWith(res);
}
}
public void ReplaceWith(ScriptVar newVar)
{
if (IsConst && Var?.IsUndefined == false)
{
throw new JITException(string.Format("{0} is const, cannot assign a new value", Name));
}
var oldVar = Var;
Var = newVar.Ref();
oldVar.UnRef();
}
private void ParseFunctionArguments(ScriptVar funcVar)
{
_currentLexer.Match((ScriptLex.LexTypes) '(');
while (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
funcVar.AddChildNoDup(_currentLexer.TokenString, null);
_currentLexer.Match(ScriptLex.LexTypes.Id);
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
_currentLexer.Match((ScriptLex.LexTypes) ')');
}
public void RemoveChild(ScriptVar child)
{
ScriptVarLink link = FirstChild;
while (link != null)
{
if (link.Var == child)
{
break;
}
link = link.Next;
}
RemoveLink(link);
}
public ScriptEngine()
{
currentLexer = null;
scopes = new List <ScriptVar>();
callStack = new Stack <ScriptVarLink>();
Root = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
objectClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
stringClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
arrayClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
Root.AddChild("Object", objectClass);
Root.AddChild("String", stringClass);
Root.AddChild("Array", arrayClass);
}
public void AddMethod(String funcName, String[] args, ScriptCallbackCB callback, Object userdata)
{
ScriptVar funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callback, userdata);
//do we have any arguments to create?
if (args != null)
{
foreach (string arg in args)
{
funcVar.AddChildNoDup(arg, null);
}
}
Root.AddChild(funcName, funcVar);
}
public ScriptVarLink AddChildNoDup(String childName, ScriptVar child)
{
ScriptVar c = child ?? new ScriptVar();
ScriptVarLink v = FindChild(childName);
if (v != null)
{
v.ReplaceWith(c);
}
else
{
v = AddChild(childName, c);
}
return(v);
}
public ScriptVar DeepCopy()
{
ScriptVar newVar = new ScriptVar();
newVar.CopySimpleData(this);
ScriptVarLink link = FirstChild;
while (link != null)
{
ScriptVar copied = link.Name != PrototypeClassName?link.Var.DeepCopy() : link.Var;
newVar.AddChild(link.Name, copied);
link = link.Next;
}
return(newVar);
}
private ScriptVarLink FindInParentClasses(ScriptVar obj, String name)
{
ScriptVarLink implementation;
ScriptVarLink parentClass = obj.FindChild(ScriptVar.PrototypeClassName);
while (parentClass != null)
{
implementation = parentClass.Var.FindChild(name);
if (implementation != null)
{
return(implementation);
}
parentClass = parentClass.Var.FindChild(ScriptVar.PrototypeClassName);
}
if (obj.IsString)
{
implementation = _stringClass.FindChild(name);
if (implementation != null)
{
return(implementation);
}
}
if (obj.IsArray)
{
implementation = _arrayClass.FindChild(name);
if (implementation != null)
{
return(implementation);
}
}
implementation = _objectClass.FindChild(name);
if (implementation != null)
{
return(implementation);
}
return(null);
}
public void AddObject(String[] ns, String objectName, ScriptVar val)
{
ScriptVar baseVar = Root;
if (ns != null)
{
int x = 0;
for (; x < ns.Length; x++)
{
ScriptVarLink link = baseVar.FindChild(ns[x]);
if (link == null)
{
link = baseVar.AddChild(ns[x], new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
}
}
baseVar.AddChild(objectName, val);
}
public ScriptEngine(bool loadProviders = true)
{
_currentLexer = null;
_scopes = new Stack <ScriptVar>();
_callStack = new Stack <string>();
Root = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_stringClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_objectClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_arrayClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
Root.AddChild("String", _stringClass);
Root.AddChild("Object", _objectClass);
Root.AddChild("Array", _arrayClass);
if (loadProviders)
{
LoadAllFunctionProviders();
}
}
public void CopyValue(ScriptVar val)
{
if (val != null)
{
CopySimpleData(val);
RemoveAllChildren();
ScriptVarLink link = val.FirstChild;
while (link != null)
{
ScriptVar copied = link.Name != PrototypeClassName?link.Var.DeepCopy() : link.Var;
AddChild(link.Name, copied);
link = link.Next;
}
}
else
{
SetUndefined();
}
}
public void SetArrayIndex(Int32 idx, ScriptVar value)
{
ScriptVarLink link = FindChild(String.Format("{0}", idx));
if (link != null)
{
if (value.IsUndefined)
{
RemoveLink(link);
}
else
{
link.ReplaceWith(value);
}
}
else
{
if (!value.IsUndefined)
{
AddChild(String.Format("{0}", idx), value);
}
}
}
public void AddMethod(String funcProto, ScriptCallbackCB callback, Object userdata)
{
ScriptLex oldLex = _currentLexer;
using (_currentLexer = new ScriptLex(funcProto))
{
ScriptVar baseVar = Root;
_currentLexer.Match(ScriptLex.LexTypes.RFunction);
String funcName = _currentLexer.TokenString;
_currentLexer.Match(ScriptLex.LexTypes.Id);
while (_currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
_currentLexer.Match((ScriptLex.LexTypes) '.');
ScriptVarLink link = baseVar.FindChild(funcName);
if (link == null)
{
link = baseVar.AddChild(funcName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
funcName = _currentLexer.TokenString;
_currentLexer.Match(ScriptLex.LexTypes.Id);
}
ScriptVar funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callback, userdata);
ParseFunctionArguments(funcVar);
baseVar.AddChild(funcName, funcVar);
}
_currentLexer = oldLex;
}
public void AddMethod(String[] ns, String funcName, String[] args, ScriptCallbackCB callback, Object userdata)
{
String fName = funcName;
ScriptVar baseVar = Root;
if (ns != null)
{
int x = 0;
for (; x < ns.Length; x++)
{
ScriptVarLink link = baseVar.FindChild(ns[x]);
if (link == null)
{
link = baseVar.AddChild(ns[x], new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
}
}
ScriptVar funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callback, userdata);
//do we have any arguments to create?
if (args != null)
{
foreach (string arg in args)
{
funcVar.AddChildNoDup(arg, null);
}
}
baseVar.AddChild(fName, funcVar);
}
public void AddNative(string funcDesc, ScriptCallbackCB callbackCB, object userData)
{
var oldLex = currentLexer;
currentLexer = new ScriptLex(funcDesc);
var baseVar = Root;
currentLexer.Match(ScriptLex.LexTypes.RFunction);
var funcName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
while (currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
currentLexer.Match((ScriptLex.LexTypes) '.');
var link = baseVar.FindChild(funcName);
if (link == null)
{
link = baseVar.AddChild(funcName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
funcName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
}
var funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callbackCB, userData);
ParseFunctionArguments(funcVar);
currentLexer = oldLex;
baseVar.AddChild(funcName, funcVar);
}
public ScriptVar MathsOp(ScriptVar b, ScriptLex.LexTypes op)
{
ScriptVar a = this;
char opc = (char)op;
if (op == ScriptLex.LexTypes.TypeEqual || op == ScriptLex.LexTypes.NTypeEqual)
{
bool equal = ((a._flags & Flags.VarTypeMask) == (b._flags & Flags.VarTypeMask));
if (equal)
{
ScriptVar contents = a.MathsOp(b, ScriptLex.LexTypes.Equal);
if (!contents.GetBool())
{
equal = false;
}
}
if (op == ScriptLex.LexTypes.TypeEqual)
{
return(new ScriptVar(equal));
}
return(new ScriptVar(!equal));
}
if (a.IsUndefined && b.IsUndefined)
{
if (op == ScriptLex.LexTypes.Equal)
{
return(new ScriptVar(true));
}
if (op == ScriptLex.LexTypes.NEqual)
{
return(new ScriptVar(false));
}
return(new ScriptVar());
}
if ((a.IsNumeric || a.IsUndefined) && (b.IsNumeric || b.IsUndefined))
{
if (!a.IsDouble && !b.IsDouble)
{
//ints
int da = a.GetInt();
int db = b.GetInt();
switch (opc)
{
case '+': return(new ScriptVar(da + db));
case '-': return(new ScriptVar(da - db));
case '*': return(new ScriptVar(da * db));
case '/': return(new ScriptVar(da / db));
case '&': return(new ScriptVar(da & db));
case '|': return(new ScriptVar(da | db));
case '^': return(new ScriptVar(da ^ db));
case '%': return(new ScriptVar(da % db));
case (char)ScriptLex.LexTypes.Equal: return(new ScriptVar(da == db));
case (char)ScriptLex.LexTypes.NEqual: return(new ScriptVar(da != db));
case '<': return(new ScriptVar(da < db));
case (char)ScriptLex.LexTypes.LEqual: return(new ScriptVar(da <= db));
case '>': return(new ScriptVar(da > db));
case (char)ScriptLex.LexTypes.GEqual: return(new ScriptVar(da >= db));
default: throw new ScriptException("Operation not supported on the Int datatype");
}
}
else
{
//doubles
double da = a.GetDouble();
double db = b.GetDouble();
switch (opc)
{
case '+': return(new ScriptVar(da + db));
case '-': return(new ScriptVar(da - db));
case '*': return(new ScriptVar(da * db));
case '/': return(new ScriptVar(da / db));
case (char)ScriptLex.LexTypes.Equal: return(new ScriptVar(da == db));
case (char)ScriptLex.LexTypes.NEqual: return(new ScriptVar(da != db));
case '<': return(new ScriptVar(da < db));
case (char)ScriptLex.LexTypes.LEqual: return(new ScriptVar(da <= db));
case '>': return(new ScriptVar(da > db));
case (char)ScriptLex.LexTypes.GEqual: return(new ScriptVar(da >= db));
default: throw new ScriptException("Operation not supported on the Int datatype");
}
}
}
if (a.IsArray)
{
switch (op)
{
case ScriptLex.LexTypes.Equal: return(new ScriptVar(a == b));
case ScriptLex.LexTypes.NEqual: return(new ScriptVar(a != b));
default: throw new ScriptException("Operation not supported on the Array datatype");
}
}
if (a.IsObject)
{
switch (op)
{
case ScriptLex.LexTypes.Equal: return(new ScriptVar(a == b));
case ScriptLex.LexTypes.NEqual: return(new ScriptVar(a != b));
default: throw new ScriptException("Operation not supported on the Object datatype");
}
}
string sda = a.GetString();
string sdb = b.GetString();
switch (opc)
{
case '+': return(new ScriptVar(sda + sdb, Flags.String));
case (char)ScriptLex.LexTypes.Equal: return(new ScriptVar(sda == sdb));
case (char)ScriptLex.LexTypes.NEqual: return(new ScriptVar(sda != sdb));
case '<': return(new ScriptVar(String.CompareOrdinal(sda, sdb) < 0));
case (char)ScriptLex.LexTypes.LEqual: return(new ScriptVar((String.CompareOrdinal(sda, sdb) < 0) || sda == sdb));
case '>': return(new ScriptVar(String.CompareOrdinal(sda, sdb) > 0));
case (char)ScriptLex.LexTypes.GEqual: return(new ScriptVar((String.CompareOrdinal(sda, sdb) > 0) || sda == sdb));
default: throw new ScriptException("Operation not supported on the String datatype");
}
}
private ScriptVarLink FunctionCall(ref bool execute, ScriptVarLink function, ScriptVar parent)
{
if (execute)
{
if (!function.Var.IsFunction)
{
throw new ScriptException(String.Format("{0} is not a function", function.Name));
}
_currentLexer.Match((ScriptLex.LexTypes) '(');
ScriptVar functionRoot = new ScriptVar(null, ScriptVar.Flags.Function);
if (parent != null)
{
functionRoot.AddChildNoDup("this", parent);
}
ScriptVarLink v = function.Var.FirstChild;
while (v != null)
{
ScriptVarLink value = Base(ref execute);
if (value.Var.IsBasic)
{
//pass by val
functionRoot.AddChild(v.Name, value.Var.DeepCopy());
}
else
{
//pass by ref
functionRoot.AddChild(v.Name, value.Var);
}
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
v = v.Next;
}
_currentLexer.Match((ScriptLex.LexTypes) ')');
ScriptVarLink returnVarLink = functionRoot.AddChild(ScriptVar.ReturnVarName, null);
_scopes.Push(functionRoot);
_callStack.Push(String.Format("{0} from line {1}", function.Name, _currentLexer.LineNumber));
if (function.Var.IsNative)
{
ScriptCallbackCB func = function.Var.GetCallback();
if (func != null)
{
func(functionRoot, function.Var.GetCallbackUserData(), parent);
}
}
else
{
ScriptException ex = null;
ScriptLex oldLex = _currentLexer;
ScriptLex newLex = new ScriptLex(function.Var.GetString());
_currentLexer = newLex;
try
{
Block(ref execute);
execute = true;
}
catch (ScriptException e)
{
ex = e;
}
_currentLexer = oldLex;
if (ex != null)
{
throw ex;
}
}
_callStack.Pop();
_scopes.Pop();
ScriptVarLink returnVar = new ScriptVarLink(returnVarLink.Var, null);
functionRoot.RemoveLink(returnVarLink);
return(returnVar);
}
//not executing the function, just parsing it out
_currentLexer.Match((ScriptLex.LexTypes) '(');
while (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
Base(ref execute);
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
_currentLexer.Match((ScriptLex.LexTypes) ')');
if (_currentLexer.TokenType == (ScriptLex.LexTypes) '{') //WTF?
{
Block(ref execute);
}
return(function);
}
private void Statement(ref bool execute)
{
if (_currentLexer.TokenType == ScriptLex.LexTypes.Id ||
_currentLexer.TokenType == ScriptLex.LexTypes.Int ||
_currentLexer.TokenType == ScriptLex.LexTypes.Float ||
_currentLexer.TokenType == ScriptLex.LexTypes.Str ||
_currentLexer.TokenType == (ScriptLex.LexTypes) '-')
{
//execite a basic statement
Base(ref execute);
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == (ScriptLex.LexTypes) '{')
{
//code block
Block(ref execute);
}
else if (_currentLexer.TokenType == (ScriptLex.LexTypes) ';')
{
//allow for multiple semi colon such as ;;;
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RVar)
{
//creating variables
//TODO: make this less shit
_currentLexer.Match(ScriptLex.LexTypes.RVar);
while (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
ScriptVarLink a = null;
if (execute)
{
a = _scopes.Peek().FindChildOrCreate(_currentLexer.TokenString);
}
_currentLexer.Match(ScriptLex.LexTypes.Id);
//get through the dots
while (_currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
_currentLexer.Match((ScriptLex.LexTypes) '.');
if (execute)
{
ScriptVarLink aLast = a;
if (aLast != null)
{
a = aLast.Var.FindChildOrCreate(_currentLexer.TokenString);
}
}
_currentLexer.Match(ScriptLex.LexTypes.Id);
}
//initialiser
if (_currentLexer.TokenType == (ScriptLex.LexTypes) '=')
{
_currentLexer.Match((ScriptLex.LexTypes) '=');
ScriptVarLink varLink = Base(ref execute);
if (execute)
{
if (a != null)
{
a.ReplaceWith(varLink);
}
}
}
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RIf)
{
//if condition
_currentLexer.Match(ScriptLex.LexTypes.RIf);
_currentLexer.Match((ScriptLex.LexTypes) '(');
ScriptVarLink varLink = Base(ref execute);
_currentLexer.Match((ScriptLex.LexTypes) ')');
bool condition = execute && varLink.Var.GetBool();
bool noExecute = false;
if (condition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
if (_currentLexer.TokenType == ScriptLex.LexTypes.RElse)
{
//else part of an if
_currentLexer.Match(ScriptLex.LexTypes.RElse);
if (condition)
{
Statement(ref noExecute);
}
else
{
Statement(ref execute);
}
}
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RWhile)
{
//while loop
_currentLexer.Match(ScriptLex.LexTypes.RWhile);
_currentLexer.Match((ScriptLex.LexTypes) '(');
Int32 whileConditionStart = _currentLexer.TokenStart;
ScriptVarLink condition = Base(ref execute);
bool loopCondition = execute && condition.Var.GetBool();
ScriptLex whileCond = _currentLexer.GetSubLex(whileConditionStart);
_currentLexer.Match((ScriptLex.LexTypes) ')');
Int32 whileBodyStart = _currentLexer.TokenStart;
Statement(ref loopCondition);
ScriptLex whileBody = _currentLexer.GetSubLex(whileBodyStart);
ScriptLex oldLex = _currentLexer;
//TODO: possible maximum itteration limit?
while (loopCondition)
{
whileCond.Reset();
_currentLexer = whileCond;
condition = Base(ref execute);
loopCondition = condition.Var.GetBool();
if (loopCondition)
{
whileBody.Reset();
_currentLexer = whileBody;
Statement(ref execute);
}
}
_currentLexer = oldLex;
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RFor)
{
//for loop
_currentLexer.Match(ScriptLex.LexTypes.RFor);
_currentLexer.Match((ScriptLex.LexTypes) '(');
Statement(ref execute); //init
int forConditionStart = _currentLexer.TokenStart;
ScriptVarLink condition = Base(ref execute);
bool noExecute = false;
bool loopCondition = execute && condition.Var.GetBool();
ScriptLex forCondition = _currentLexer.GetSubLex(forConditionStart);
_currentLexer.Match((ScriptLex.LexTypes) ';');
int forIterStart = _currentLexer.TokenStart;
Base(ref noExecute);
ScriptLex forIter = _currentLexer.GetSubLex(forIterStart);
_currentLexer.Match((ScriptLex.LexTypes) ')');
int forBodyStart = _currentLexer.TokenStart;
if (loopCondition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
ScriptLex forBody = _currentLexer.GetSubLex(forBodyStart);
ScriptLex oldLex = _currentLexer;
if (loopCondition)
{
forIter.Reset();
_currentLexer = forIter;
Base(ref execute);
}
//TODO: limit number of iterations?
while (execute && loopCondition)
{
forCondition.Reset();
_currentLexer = forCondition;
condition = Base(ref execute);
loopCondition = condition.Var.GetBool();
if (execute && loopCondition)
{
forBody.Reset();
_currentLexer = forBody;
Statement(ref execute);
}
if (execute && loopCondition)
{
forIter.Reset();
_currentLexer = forIter;
Base(ref execute);
}
}
_currentLexer = oldLex;
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RReturn)
{
_currentLexer.Match(ScriptLex.LexTypes.RReturn);
ScriptVarLink res = null;
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
res = Base(ref execute);
}
if (execute)
{
ScriptVarLink resultVar = _scopes.Peek().FindChild(ScriptVar.ReturnVarName);
if (resultVar != null)
{
resultVar.ReplaceWith(res);
}
else
{
//return statement outside of function???
System.Diagnostics.Trace.TraceWarning("Return statement outside of a function, what is going on?");
}
}
execute = false;
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RFunction)
{
//function
ScriptVarLink funcVar = ParseFunctionDefinition();
if (execute)
{
if (funcVar.Name == String.Empty)
{
//functions must have a name at statement level
}
else
{
ScriptVar v = _scopes.Peek();
v.AddChildNoDup(funcVar.Name, funcVar.Var);
}
}
}
else
{
_currentLexer.Match(ScriptLex.LexTypes.Eof);
}
}
private ScriptVarLink FunctionCall(ref bool execute, ScriptVarLink function, ScriptVar parent)
{
if (execute)
{
if (!function.Var.IsFunction)
{
throw new ScriptException(String.Format("{0} is not a function", function.Name));
}
currentLexer.Match((ScriptLex.LexTypes) '(');
var functionRoot = new ScriptVar(null, ScriptVar.Flags.Function);
if (parent != null)
{
functionRoot.AddChildNoDup("this", parent);
}
var v = function.Var.FirstChild;
while (v != null)
{
var value = Base(ref execute);
if (execute)
{
if (value.Var.IsBasic)
{
//pass by val
functionRoot.AddChild(v.Name, value.Var.DeepCopy());
}
else
{
//pass by ref
functionRoot.AddChild(v.Name, value.Var);
}
}
if (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
currentLexer.Match((ScriptLex.LexTypes) ',');
}
v = v.Next;
}
currentLexer.Match((ScriptLex.LexTypes) ')');
var returnVarLink = functionRoot.AddChild(ScriptVar.ReturnVarName, null);
scopes.PushBack(functionRoot);
//callStack.PushBack(string.Format("{0} from line {1}", function.Name, currentLexer.LineNumber));
callStack.Push(function);
if (function.Var.IsNative)
{
var func = function.Var.GetCallback();
func?.Invoke(functionRoot, function.Var.GetCallbackUserData());
}
else
{
var oldLex = currentLexer;
var newLex = new ScriptLex(function.Var.String);
currentLexer = newLex;
try
{
Block(ref execute);
execute = true;
}
catch
{
throw;
}
finally
{
currentLexer = oldLex;
}
}
callStack.Pop();
scopes.PopBack();
var returnVar = new ScriptVarLink(returnVarLink.Var, null);
functionRoot.RemoveLink(returnVarLink);
return(returnVar);
}
else
{
//not executing the function, just parsing it out
currentLexer.Match((ScriptLex.LexTypes) '(');
while (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
Base(ref execute);
if (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
currentLexer.Match((ScriptLex.LexTypes) ')');
if (currentLexer.TokenType == (ScriptLex.LexTypes) '{') //WTF?
{
Block(ref execute);
}
return(function);
}
}
public void SetReturnVar(ScriptVar var)
{
FindChildOrCreate(ReturnVarName).ReplaceWith(var);
}