public Completion ExecuteSwitchBlock(List <SwitchCase> switchBlock, JsValue input)
{
JsValue v = Undefined.Instance;
SwitchCase defaultCase = null;
bool hit = false;
for (int i = 0, len = switchBlock.Count; i < len; i++)
{
var clause = switchBlock[i];
if (clause.Test == null)
{
defaultCase = clause;
}
else
{
var clauseSelector = _engine.GetValue(_engine.EvaluateExpression(clause.Test));
if (ExpressionInterpreter.StrictlyEqual(clauseSelector, input))
{
hit = true;
}
}
if (hit && clause.Consequent != null)
{
var r = ExecuteStatementList(clause.Consequent);
if (r.Type != Completion.Normal)
{
return(r);
}
v = r.Value != null ? r.Value : Undefined.Instance;
}
}
// do we need to execute the default case ?
if (hit == false && defaultCase != null)
{
var r = ExecuteStatementList(defaultCase.Consequent);
if (r.Type != Completion.Normal)
{
return(r);
}
v = r.Value != null ? r.Value : Undefined.Instance;
}
return(new Completion(Completion.Normal, v, null));
}
public Engine(Action<Options> options)
{
_executionContexts = new Stack<ExecutionContext>();
Global = GlobalObject.CreateGlobalObject(this);
Object = ObjectConstructor.CreateObjectConstructor(this);
Function = FunctionConstructor.CreateFunctionConstructor(this);
Array = ArrayConstructor.CreateArrayConstructor(this);
String = StringConstructor.CreateStringConstructor(this);
RegExp = RegExpConstructor.CreateRegExpConstructor(this);
Number = NumberConstructor.CreateNumberConstructor(this);
Boolean = BooleanConstructor.CreateBooleanConstructor(this);
Date = DateConstructor.CreateDateConstructor(this);
Math = MathInstance.CreateMathObject(this);
Json = JsonInstance.CreateJsonObject(this);
Error = ErrorConstructor.CreateErrorConstructor(this, "Error");
EvalError = ErrorConstructor.CreateErrorConstructor(this, "EvalError");
RangeError = ErrorConstructor.CreateErrorConstructor(this, "RangeError");
ReferenceError = ErrorConstructor.CreateErrorConstructor(this, "ReferenceError");
SyntaxError = ErrorConstructor.CreateErrorConstructor(this, "SyntaxError");
TypeError = ErrorConstructor.CreateErrorConstructor(this, "TypeError");
UriError = ErrorConstructor.CreateErrorConstructor(this, "URIError");
// Because the properties might need some of the built-in object
// their configuration is delayed to a later step
Global.Configure();
Object.Configure();
Object.PrototypeObject.Configure();
Function.Configure();
Function.PrototypeObject.Configure();
Array.Configure();
Array.PrototypeObject.Configure();
String.Configure();
String.PrototypeObject.Configure();
RegExp.Configure();
RegExp.PrototypeObject.Configure();
Number.Configure();
Number.PrototypeObject.Configure();
Boolean.Configure();
Boolean.PrototypeObject.Configure();
Date.Configure();
Date.PrototypeObject.Configure();
Math.Configure();
Json.Configure();
Error.Configure();
Error.PrototypeObject.Configure();
// create the global environment http://www.ecma-international.org/ecma-262/5.1/#sec-10.2.3
GlobalEnvironment = LexicalEnvironment.NewObjectEnvironment(this, Global, null, false);
// create the global execution context http://www.ecma-international.org/ecma-262/5.1/#sec-10.4.1.1
EnterExecutionContext(GlobalEnvironment, GlobalEnvironment, Global);
Options = new Options();
if (options != null)
{
options(Options);
}
Eval = new EvalFunctionInstance(this, new string[0], LexicalEnvironment.NewDeclarativeEnvironment(this, ExecutionContext.LexicalEnvironment), StrictModeScope.IsStrictModeCode);
Global.FastAddProperty("eval", Eval, true, false, true);
_statements = new StatementInterpreter(this);
_expressions = new ExpressionInterpreter(this);
if (Options.IsClrAllowed())
{
Global.FastAddProperty("System", new NamespaceReference(this, "System"), false, false, false);
Global.FastAddProperty("importNamespace", new ClrFunctionInstance(this, (thisObj, arguments) =>
{
return new NamespaceReference(this, TypeConverter.ToString(arguments.At(0)));
}), false, false, false);
}
ClrTypeConverter = new DefaultTypeConverter(this);
BreakPoints = new List<BreakPoint>();
DebugHandler = new DebugHandler(this);
}
public void ExecuteSwitchBlock(RuntimeState state)
{
ExecuteSwitchBlockArgs args = (ExecuteSwitchBlockArgs)state.arg;
List <SwitchCase> switchBlock = args.switchBlock;
JsValue input = args.input;
ExecuteSwitchBlockLocal local;
if (state.local == null)
{
state.local = local = new ExecuteSwitchBlockLocal();
local.v = Undefined.Instance;
local.defaultCase = null;
local.hit = false;
local.switchBlockCount = switchBlock.Count;
local.i = 0;
local.stage = 0;
}
else
{
local = (ExecuteSwitchBlockLocal)state.local;
}
if (local.stage == 0) // for loop
{
if (local.i < local.switchBlockCount)
{
local.stage = 1;
}
else
{
local.stage = 2;
}
}
if (local.stage == 1) // inside for loop
{
if (state.calleeReturned && state.stage != 10)
{
Completion r = (Completion)state.calleeReturnValue;
if (r.Type != CompletionType.Normal)
{
Return(r);
return;
}
local.v = r.Value ?? Undefined.Instance;
}
var clause = switchBlock[local.i];
if (clause.Test == null)
{
local.defaultCase = clause;
}
else
{
if (state.calleeReturned)
{
state.calleeReturned = false;
state.stage = 0;
var clauseSelector = _engine.GetValue(state.calleeReturnValue, true);
if (ExpressionInterpreter.StrictlyEqual(clauseSelector, input))
{
local.hit = true;
}
}
else
{
state.stage = 10;
Call(_engine.EvaluateExpression, clause.Test);
return;
}
}
if (local.hit && clause.Consequent != null)
{
Call(ExecuteStatementList, clause.Consequent);
return;
}
local.i++;
local.stage = 0;
return;
}
if (local.stage == 2)
{
if (state.calleeReturned)
{
Completion r = (Completion)state.calleeReturnValue;
if (r.Type != CompletionType.Normal)
{
Return(r);
return;
}
local.v = r.Value ?? Undefined.Instance;
}
// do we need to execute the default case ?
if (local.hit == false && local.defaultCase != null)
{
Call(ExecuteStatementList, local.defaultCase.Consequent);
return;
}
Return(new Completion(CompletionType.Normal, local.v, null));
return;
}
}
