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 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 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);
}
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);
}
}
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) '(');
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);
}