public TypedArrayInstance Of(params object[] elements)
{
int length = elements.Length;
var result = new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(length * BytesPerElement), 0, length);
for (int i = 0; i < length; i++)
{
result[i] = elements[i];
}
return(result);
}
// INITIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a new typed array constructor.
/// </summary>
/// <param name="prototype"> The next object in the prototype chain. </param>
/// <param name="type"> Defines the element type and behaviour of the typed array. </param>
internal TypedArrayConstructor(ObjectInstance prototype, TypedArrayType type)
: base(prototype, __STUB__Construct, __STUB__Call)
{
this.type = type;
// Initialize the constructor properties.
var properties = GetDeclarativeProperties(Engine);
InitializeConstructorProperties(properties, type.ToString(), 3, TypedArrayInstance.CreatePrototype(Engine, this));
properties.Add(new PropertyNameAndValue("BYTES_PER_ELEMENT", BytesPerElement, PropertyAttributes.Sealed));
FastSetProperties(properties);
}
public TypedArrayInstance From(object source, FunctionInstance mapFn = null, object thisArg = null)
{
var items = TypeConverter.ToObject(Engine, source);
var iterator = TypeUtilities.GetIterator(Engine, items);
if (iterator != null)
{
// Loop.
var values = new List <object>();
foreach (var value in TypeUtilities.Iterate(Engine, iterator))
{
// Collect the values.
values.Add(value);
}
// Convert the values into a typed array instance.
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(values.Count * BytesPerElement), 0, values.Count);
for (int i = 0; i < values.Count; i++)
{
if (mapFn != null)
{
result[i] = mapFn.Call(thisArg, values[i], i);
}
else
{
result[i] = values[i];
}
}
return(result);
}
else
{
// There was no iterator symbol value, so fall back on the alternate method.
int length = TypeConverter.ToInt32(items["length"]);
var result = new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(length * BytesPerElement), 0, length);
for (int i = 0; i < length; i++)
{
if (mapFn != null)
{
result[i] = mapFn.Call(thisArg, items[i], i);
}
else
{
result[i] = items[i];
}
}
return(result);
}
}
// .NET HELPER METHODS
//_________________________________________________________________________________________
/// <summary>
/// Creates a new typed array from a .NET array.
/// </summary>
/// <param name="source"> A .NET array </param>
/// <returns> A new typed array instance. </returns>
public TypedArrayInstance From(object[] source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(source.Length * BytesPerElement), 0, source.Length);
for (int i = 0; i < source.Length; i++)
{
result[i] = source[i];
}
return(result);
}
/// <summary>
/// Creates a new TypedArrayWrapper instance.
/// </summary>
/// <param name="wrappedInstance"> The typed array that is being wrapped. </param>
public TypedArrayAdapter(TypedArrayInstance wrappedInstance)
: base(wrappedInstance, wrappedInstance.Length)
{
}
public TypedArrayInstance Of(params object[] elements)
{
int length = elements.Length;
var result = new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(length * BytesPerElement), 0, length);
for (int i = 0; i < length; i++)
{
result[i] = elements[i];
}
return result;
}
public TypedArrayInstance From(object source, FunctionInstance mapFn = null, object thisArg = null)
{
var items = TypeConverter.ToObject(Engine, source);
var iterator = TypeUtilities.GetIterator(Engine, items);
if (iterator != null)
{
// Loop.
var values = new List<object>();
foreach (var value in TypeUtilities.Iterate(Engine, iterator))
{
// Collect the values.
values.Add(value);
}
// Convert the values into a typed array instance.
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(values.Count * BytesPerElement), 0, values.Count);
for (int i = 0; i < values.Count; i++)
{
if (mapFn != null)
result[i] = mapFn.Call(thisArg, values[i], i);
else
result[i] = values[i];
}
return result;
}
else
{
// There was no iterator symbol value, so fall back on the alternate method.
int length = TypeConverter.ToInt32(items["length"]);
var result = new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(length * BytesPerElement), 0, length);
for (int i = 0; i < length; i++)
{
if (mapFn != null)
result[i] = mapFn.Call(thisArg, items[i], i);
else
result[i] = items[i];
}
return result;
}
}
// .NET HELPER METHODS
//_________________________________________________________________________________________
/// <summary>
/// Creates a new typed array from a .NET array.
/// </summary>
/// <param name="source"> A .NET array </param>
/// <returns> A new typed array instance. </returns>
public TypedArrayInstance From(object[] source)
{
if (source == null)
throw new ArgumentNullException("source");
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(source.Length * BytesPerElement), 0, source.Length);
for (int i = 0; i < source.Length; i ++)
{
result[i] = source[i];
}
return result;
}
public TypedArrayInstance Construct(object arg, int byteOffset = 0, int? length = null)
{
// new Int8Array(typedArray);
// new Int8Array(object);
// new Int8Array(buffer[, byteOffset[, length]]);
if (arg is TypedArrayInstance)
{
// new %TypedArray%(typedArray);
var typedArray = (TypedArrayInstance)arg;
// Copy the items one by one.
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(typedArray.Length * BytesPerElement), 0, typedArray.Length);
for (int i = 0; i < typedArray.Length; i++)
{
result[i] = typedArray[i];
}
return result;
}
else if (arg is ArrayBufferInstance)
{
// new %TypedArray%(buffer[, byteOffset[, length]]);
var buffer = (ArrayBufferInstance)arg;
int bytesPerElement = BytesPerElement;
int actualLength;
if (length == null)
{
if (byteOffset < 0)
throw new JavaScriptException(Engine, ErrorType.RangeError, "Invalid typed array offset");
if ((byteOffset % BytesPerElement) != 0)
throw new JavaScriptException(Engine, ErrorType.RangeError, $"Start offset of {this.type} should be a multiple of {BytesPerElement}");
if ((buffer.ByteLength % BytesPerElement) != 0)
throw new JavaScriptException(Engine, ErrorType.RangeError, $"Byte length of {this.type} should be a multiple of {BytesPerElement}");
actualLength = (buffer.ByteLength - byteOffset) / bytesPerElement;
if (actualLength < 0)
throw new JavaScriptException(Engine, ErrorType.RangeError, "Start offset is too large");
}
else
{
actualLength = length.Value;
if (byteOffset + actualLength * bytesPerElement > buffer.ByteLength)
throw new JavaScriptException(Engine, ErrorType.RangeError, "Invalid typed array length");
}
return new TypedArrayInstance(this.InstancePrototype, this.type, buffer, byteOffset, actualLength);
}
else if (arg is ObjectInstance)
{
// new %TypedArray%(object);
return From(arg);
}
else
{
// new %TypedArray%(length);
if (TypeUtilities.IsUndefined(arg))
throw new JavaScriptException(Engine, ErrorType.TypeError, "Argument cannot be undefined");
int argLength = TypeConverter.ToInteger(arg);
return new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(argLength * BytesPerElement), 0, argLength);
}
}
public TypedArrayInstance Construct(object arg, int byteOffset = 0, int?length = null)
{
// new Int8Array(typedArray);
// new Int8Array(object);
// new Int8Array(buffer[, byteOffset[, length]]);
if (arg is TypedArrayInstance)
{
// new %TypedArray%(typedArray);
var typedArray = (TypedArrayInstance)arg;
// Copy the items one by one.
var result = new TypedArrayInstance(this.InstancePrototype, this.type,
Engine.ArrayBuffer.Construct(typedArray.Length * BytesPerElement), 0, typedArray.Length);
for (int i = 0; i < typedArray.Length; i++)
{
result[i] = typedArray[i];
}
return(result);
}
else if (arg is ArrayBufferInstance)
{
// new %TypedArray%(buffer[, byteOffset[, length]]);
var buffer = (ArrayBufferInstance)arg;
int bytesPerElement = BytesPerElement;
int actualLength;
if (length == null)
{
if (byteOffset < 0)
{
throw new JavaScriptException(Engine, ErrorType.RangeError, "Invalid typed array offset");
}
if ((byteOffset % BytesPerElement) != 0)
{
throw new JavaScriptException(Engine, ErrorType.RangeError, $"Start offset of {this.type} should be a multiple of {BytesPerElement}");
}
if ((buffer.ByteLength % BytesPerElement) != 0)
{
throw new JavaScriptException(Engine, ErrorType.RangeError, $"Byte length of {this.type} should be a multiple of {BytesPerElement}");
}
actualLength = (buffer.ByteLength - byteOffset) / bytesPerElement;
if (actualLength < 0)
{
throw new JavaScriptException(Engine, ErrorType.RangeError, "Start offset is too large");
}
}
else
{
actualLength = length.Value;
if (byteOffset + actualLength * bytesPerElement > buffer.ByteLength)
{
throw new JavaScriptException(Engine, ErrorType.RangeError, "Invalid typed array length");
}
}
return(new TypedArrayInstance(this.InstancePrototype, this.type, buffer, byteOffset, actualLength));
}
else if (arg is ObjectInstance)
{
// new %TypedArray%(object);
return(From(arg));
}
else
{
// new %TypedArray%(length);
if (TypeUtilities.IsUndefined(arg))
{
throw new JavaScriptException(Engine, ErrorType.TypeError, "Argument cannot be undefined");
}
int argLength = TypeConverter.ToInteger(arg);
return(new TypedArrayInstance(this.InstancePrototype, this.type, Engine.ArrayBuffer.Construct(argLength * BytesPerElement), 0, argLength));
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="typedArrayInstance">The displayed TypedArrayInstance</param>
public TypedArrayInstanceDebugView(TypedArrayInstance typedArrayInstance)
{
this.typedArrayInstance = typedArrayInstance;
}