public JintEngine()
{
PermissionSet = new PermissionSet(PermissionState.None);
TypeSystem = new TypeSystem();
_runtime = new JintRuntime(this);
}
// 15.2.2.1
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
// TODO: This looks wrong. It looks like this should be returning
// a JsObject that has the value set to the parameter. Chrome returns
// 'object' for typeof(new Object(7)) and typeof(Object(7)).
if (arguments.Length > 0)
{
var argument = arguments[0];
var global = runtime.Global;
switch (argument.GetJsType())
{
case JsType.String: return global.CreateObject(argument, global.StringClass);
case JsType.Number: return global.CreateObject((double)argument, global.NumberClass);
case JsType.Boolean: return global.CreateObject(argument, global.BooleanClass);
default: return argument;
}
}
var obj = runtime.Global.CreateObject(callee.Prototype);
obj.DefineProperty(
Id.constructor,
callee,
PropertyAttributes.DontEnum
);
return obj;
}
public static object Exec(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
var manager = (RegexManager)target.Value;
return (object)manager.Exec(runtime, JsValue.ToString(arguments[0])) ?? JsNull.Instance;
}
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
if (target == runtime.Global.GlobalScope)
target = runtime.Global.CreateObject(callee.Prototype);
string pattern = null;
string options = null;
if (arguments.Length > 0)
{
pattern = JsValue.ToString(arguments[0]);
if (arguments.Length > 1)
options = JsValue.ToString(arguments[1]);
}
var manager = new RegexManager(pattern, options);
target.SetClass(JsNames.ClassRegexp);
target.IsClr = false;
target.Value = manager;
target.SetProperty(Id.source, pattern);
target.SetProperty(Id.lastIndex, (double)0);
target.SetProperty(Id.global, BooleanBoxes.Box(manager.IsGlobal));
return target;
}
public static object Call(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (!JsValue.IsFunction(@this))
throw new JsException(JsErrorType.TypeError, "The target of call() must be a function");
object target;
if (arguments.Length >= 1 && !JsValue.IsNullOrUndefined(arguments[0]))
target = arguments[0];
else
target = runtime.GlobalScope;
object[] argumentsCopy;
if (arguments.Length >= 2 && !JsValue.IsNull(arguments[1]))
{
argumentsCopy = new object[arguments.Length - 1];
Array.Copy(arguments, 1, argumentsCopy, 0, argumentsCopy.Length);
}
else
{
argumentsCopy = JsValue.EmptyArray;
}
// Executes the statements in 'that' and use _this as the target of the call
return ((JsObject)@this).Execute(runtime, target, argumentsCopy);
}
public static object DecodeURIComponent(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1 || JsValue.IsUndefined(arguments[0]))
return String.Empty;
return Uri.UnescapeDataString(JsValue.ToString(arguments[0]).Replace("+", " "));
}
public static object Apply(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (!JsValue.IsFunction(@this))
throw new ArgumentException("The target of call() must be a function");
object target;
if (arguments.Length >= 1 && !JsValue.IsNullOrUndefined(arguments[0]))
target = arguments[0];
else
target = runtime.Global.GlobalScope;
object[] argumentsCopy;
if (arguments.Length >= 2)
{
var shim = new ArrayShim(arguments[1]);
argumentsCopy = new object[shim.Length];
foreach (var item in shim)
{
argumentsCopy[item.Key] = item.Value;
}
}
else
{
argumentsCopy = JsValue.EmptyArray;
}
// Executes the statements in 'that' and use _this as the target of the call
return ((JsObject)@this).Execute(runtime, target, argumentsCopy);
}
private object GetPropertySlow(JintRuntime runtime, int index, ref DictionaryCacheSlot cacheSlot)
{
if (_store != null)
{
return ((JsObject)_value).GetPropertySlow(index, ref cacheSlot);
}
#if TRACE_SPECULATION
Trace.WriteLine("Dictionary cache miss");
#endif
return runtime.GetMemberByIndex(_value, index);
}
public object GetProperty(JintRuntime runtime, int index, ref DictionaryCacheSlot cacheSlot)
{
if (_store != null && cacheSlot.Schema == _store.Schema)
{
#if TRACE_SPECULATION
// Trace.WriteLine("Dictionary cache hit");
#endif
return _store.GetOwnPropertyRawUnchecked(cacheSlot.Index);
}
return GetPropertySlow(runtime, index, ref cacheSlot);
}
// 15.2.3.2
public static object GetPrototypeOf(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var @object = arguments[0] as JsObject;
if (@object == null)
throw new JsException(JsErrorType.TypeError);
var constructor = @object.GetProperty(Id.constructor) as JsObject;
if (constructor != null)
return constructor.GetProperty(Id.prototype);
return JsNull.Instance;
}
// 15.5.4.6
public static object Concat(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var sb = new StringBuilder();
sb.Append(JsValue.ToString(@this));
for (int i = 0; i < arguments.Length; i++)
{
sb.Append(JsValue.ToString(arguments[i]));
}
return sb.ToString();
}
public static object Min(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length == 0)
return DoubleBoxes.PositiveInfinity;
var result = JsValue.ToNumber(arguments[0]);
foreach (var argument in arguments)
{
result = Math.Min(JsValue.ToNumber(argument), result);
}
return result;
}
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
if (target == runtime.Global.GlobalScope)
target = runtime.Global.CreateObject(callee.Prototype);
target.SetClass(callee.Delegate.Name);
target.IsClr = false;
if (arguments.Length > 0)
target.SetProperty(Id.message, arguments[0]);
return target;
}
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
if (target == runtime.Global.GlobalScope)
return BooleanBoxes.Box(arguments.Length > 0 && JsValue.ToBoolean(arguments[0]));
// e.g., var foo = new Boolean(true);
if (arguments.Length > 0)
target.Value = JsValue.ToBoolean(arguments[0]);
else
target.Value = false;
return @this;
}
// 15.5.4.5
public static object CharCodeAt(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length == 0)
return String.Empty;
int pos = (int)JsValue.ToInteger(arguments[0]);
if (pos < 0)
return DoubleBoxes.NaN;
string value = JsValue.ToString(@this);
if (pos >= value.Length)
return DoubleBoxes.NaN;
return (double)value[pos];
}
// 15.2.3.6
public static object DefineProperty(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var instance = arguments[0] as JsObject;
if (instance == null)
throw new JsException(JsErrorType.TypeError);
ToPropertyDescriptor(
runtime.Global,
instance,
JsValue.ToString(arguments[1]),
arguments[2]
);
return instance;
}
// 15.5.4.4
public static object CharAt(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length == 0)
return String.Empty;
int pos = (int)JsValue.ToInteger(arguments[0]);
if (pos < 0)
return String.Empty;
string value = JsValue.ToString(@this);
if (pos >= value.Length)
return String.Empty;
return new String(value[pos], 1);
}
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
if (target == runtime.Global.GlobalScope)
{
// 15.7.1 - When Number is called as a function rather than as a constructor, it performs a type conversion.
if (arguments.Length > 0)
return JsValue.ToNumber(arguments[0]);
return (double)0;
}
// 15.7.2 - When Number is called as part of a new expression, it is a constructor: it initializes the newly created object.
target.Value = arguments.Length > 0 ? JsValue.ToNumber(arguments[0]) : 0;
return @this;
}
// 15.7.4.6
public static object ToExponential(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
double value = JsValue.ToNumber(@this);
if (Double.IsInfinity(value) || Double.IsNaN(value))
return ((JsObject)((JsObject)@this).GetProperty(Id.toString)).Execute(runtime, @this, JsValue.EmptyArray);
int fractions = 16;
if (arguments.Length > 0)
fractions = (int)JsValue.ToNumber(arguments[0]);
if (fractions > 20 || fractions < 0)
throw new JsException(JsErrorType.SyntaxError, "Fraction Digits must be greater than 0 and lesser than 20");
string format = "#." + new String('0', fractions)+ "e+0";
return value.ToString(format, CultureInfo.InvariantCulture);
}
// 15.7.4.5
public static object ToFixed(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
int fractions = 0;
if (arguments.Length > 0)
fractions = (int)JsValue.ToNumber(arguments[0]);
if (fractions > 20 || fractions < 0)
throw new JsException(JsErrorType.SyntaxError, "Fraction Digits must be greater than 0 and lesser than 20");
double value = JsValue.ToNumber(@this);
if (Double.IsNaN(value))
return JsValue.ToString(@this);
return value.ToString(
"f" + fractions.ToString(CultureInfo.InvariantCulture),
CultureInfo.InvariantCulture
);
}
public object GetProperty(JintRuntime runtime, double index)
{
if (_store != null)
{
int intIndex = (int)index;
if (intIndex == index)
{
#if TRACE_SPECULATION
// Trace.WriteLine("Array cache hit");
#endif
return _store.GetOwnProperty(intIndex);
}
}
#if TRACE_SPECULATION
Trace.WriteLine("Array cache miss");
#endif
return runtime.Operation_Member(_value, index);
}
public JsGlobal(JintRuntime runtime, JintEngine engine)
{
if (runtime == null)
throw new ArgumentNullException("runtime");
_runtime = runtime;
Id.SeedGlobal(this);
PrototypeSink = CreatePrototypeSink();
RootSchema = new JsSchema();
Engine = engine;
// The Random instance is used by Math to generate random numbers.
Random = new Random();
BuildEnvironment();
GlobalScope = CreateGlobalScope();
Marshaller = new Marshaller(runtime, this);
Marshaller.Initialize();
}
public static object Constructor(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
var target = (JsObject)@this;
if (target == runtime.Global.GlobalScope)
{
// 15.5.1 - When String is called as a function rather than as a constructor, it performs a type conversion.
if (arguments.Length > 0)
{
var argument = arguments[0];
if (JsValue.IsString(argument))
return argument;
return JsValue.ToString(argument);
}
return String.Empty;
}
else
{
// 15.5.2 - When String is called as part of a new expression, it is a constructor: it initializes the newly created object.
if (arguments.Length > 0)
{
var argument = arguments[0];
if (JsValue.IsString(argument))
target.Value = argument;
else
target.Value = JsValue.ToString(argument);
}
else
{
target.Value = String.Empty;
}
return target;
}
}
public static object ValueOf(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
return BooleanBoxes.Box(JsValue.ToBoolean(@this));
}
public static object ToString(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
return JsConvert.ToString(JsValue.ToBoolean(@this));
}
public static object EncodeURI(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1 || JsValue.IsUndefined(arguments[0]))
return String.Empty;
string encoded = Uri.EscapeDataString(JsValue.ToString(arguments[0]));
foreach (char c in ReservedEncoded)
{
encoded = encoded.Replace(Uri.EscapeDataString(c.ToString()), c.ToString());
}
foreach (char c in ReservedEncodedComponent)
{
encoded = encoded.Replace(Uri.EscapeDataString(c.ToString()), c.ToString());
}
return encoded.ToUpper();
}
/// <summary>
/// 15.1.2.2
/// </summary>
public static object ParseInt(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1 || JsValue.IsUndefined(arguments[0]))
return JsUndefined.Instance;
// In case of an enum, just cast it to an integer
if (JsValue.IsClr(arguments[0]))
{
var value = JsValue.UnwrapValue(arguments[0]);
if (value.GetType().IsEnum)
return (double)((int)value);
}
string number = JsValue.ToString(arguments[0]).Trim();
int sign = 1;
int radix = 10;
if (number == String.Empty)
return DoubleBoxes.NaN;
if (number.StartsWith("-"))
{
number = number.Substring(1);
sign = -1;
}
else if (number.StartsWith("+"))
{
number = number.Substring(1);
}
if (
arguments.Length >= 2 &&
!JsValue.IsUndefined(arguments[1]) &&
JsValue.ToNumber(arguments[1]) != 0
)
radix = (int)JsValue.ToNumber(arguments[1]);
if (radix == 0)
radix = 10;
else if (radix < 2 || radix > 36)
return DoubleBoxes.NaN;
if (number.ToLower().StartsWith("0x"))
radix = 16;
try
{
if (radix == 10)
{
// most common case
double result;
if (double.TryParse(number, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
// parseInt(12.42) == 42
return sign * Math.Floor(result);
}
else
{
return DoubleBoxes.NaN;
}
}
else
{
return (double)(sign * Convert.ToInt32(number, radix));
}
}
catch
{
return DoubleBoxes.NaN;
}
}
/// <summary>
/// 15.1.2.3
/// </summary>
public static object ParseFloat(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1 || JsValue.IsUndefined(arguments[0]))
return JsUndefined.Instance;
string number = JsValue.ToString(arguments[0]).Trim();
// the parseFloat function should stop parsing when it encounters an disallowed char
Regex regexp = new Regex(@"^[\+\-\d\.e]*", RegexOptions.IgnoreCase);
Match match = regexp.Match(number);
double result;
if (match.Success && double.TryParse(match.Value, NumberStyles.Float, new CultureInfo("en-US"), out result))
return result;
else
return DoubleBoxes.NaN;
}
/// <summary>
/// 15.1.2.4
/// </summary>
public static object IsNaN(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1)
{
return BooleanBoxes.Box(false);
}
return BooleanBoxes.Box(double.NaN.Equals(JsValue.ToNumber(arguments[0])));
}
/// <summary>
/// 15.1.2.5
/// </summary>
public static object IsFinite(JintRuntime runtime, object @this, JsObject callee, object[] arguments)
{
if (arguments.Length < 1 || JsValue.IsUndefined(arguments[0]))
return BooleanBoxes.False;
var value = JsValue.ToNumber(arguments[0]);
return BooleanBoxes.Box(
!Double.IsNaN(value) &&
!Double.IsPositiveInfinity(value) &&
!Double.IsNegativeInfinity(value)
);
}
