Examples with SpeciesConstructor com.github.anba.es6draft.runtime.AbstractOperations.SpeciesConstructor used on opensource projects

Example 1 with SpeciesConstructor

use of com.github.anba.es6draft.runtime.AbstractOperations.SpeciesConstructor in project es6draft by anba.

the class ArrayBufferConstructor method CloneArrayBuffer.

/**
     * 24.1.1.4 CloneArrayBuffer (srcBuffer, srcByteOffset)
     * 
     * @param cx
     *            the execution context
     * @param srcBuffer
     *            the source buffer
     * @param srcByteOffset
     *            the source offset
     * @param cloneConstructor
     *            the intrinsic constructor function
     * @return the new array buffer object
     */
public static ArrayBufferObject CloneArrayBuffer(ExecutionContext cx, ArrayBuffer srcBuffer, long srcByteOffset, Intrinsics cloneConstructor) {
    /* step 1 (implicit) */
    /* steps 2-3 */
    Constructor bufferConstructor;
    if (cloneConstructor == null) {
        /* steps 2.a-b */
        bufferConstructor = SpeciesConstructor(cx, srcBuffer, Intrinsics.ArrayBuffer);
        /* step 2.c */
        if (IsDetachedBuffer(srcBuffer)) {
            throw newTypeError(cx, Messages.Key.BufferDetached);
        }
    } else {
        /* step 3 */
        assert IsConstructor(cx.getIntrinsic(cloneConstructor));
        bufferConstructor = (Constructor) cx.getIntrinsic(cloneConstructor);
    }
    /* step 4 */
    ByteBuffer srcBlock = srcBuffer.getData();
    /* step 5 */
    long srcLength = srcBuffer.getByteLength();
    /* step 6 */
    assert srcByteOffset <= srcLength;
    /* step 7 */
    long cloneLength = srcLength - srcByteOffset;
    /* steps 8-9 */
    ArrayBufferObject targetBuffer = AllocateArrayBuffer(cx, bufferConstructor, cloneLength);
    /* step 10 */
    if (IsDetachedBuffer(srcBuffer)) {
        throw newTypeError(cx, Messages.Key.BufferDetached);
    }
    /* step 11 */
    ByteBuffer targetBlock = targetBuffer.getData();
    /* step 12 */
    CopyDataBlockBytes(targetBlock, 0, srcBlock, srcByteOffset, cloneLength);
    /* step 13 */
    return targetBuffer;
}

Example 2 with SpeciesConstructor

use of com.github.anba.es6draft.runtime.AbstractOperations.SpeciesConstructor in project es6draft by anba.

the class TypedArrayConstructor method TypedArraySpeciesCreate.

/**
     * TypedArraySpeciesCreate( exemplar, argumentList )
     * 
     * @param cx
     *            the execution context
     * @param exemplar
     *            the typed array object
     * @param length
     *            the new typed array length
     * @return the new typed array object
     */
public static TypedArrayObject TypedArraySpeciesCreate(ExecutionContext cx, TypedArrayObject exemplar, long length) {
    /* step 1 (implicit) */
    /* step 2 */
    Intrinsics defaultConstructor = exemplar.getElementType().getConstructor();
    /* step 3 */
    Constructor constructor = SpeciesConstructor(cx, exemplar, defaultConstructor);
    /* step 4 */
    return TypedArrayCreate(cx, constructor, length);
}

Example 3 with SpeciesConstructor

use of com.github.anba.es6draft.runtime.AbstractOperations.SpeciesConstructor in project es6draft by anba.

the class TypedArrayConstructor method TypedArraySpeciesCreate.

/**
     * TypedArraySpeciesCreate( exemplar, argumentList )
     * 
     * @param cx
     *            the execution context
     * @param exemplar
     *            the typed array object
     * @param args
     *            the constructor function arguments
     * @return the new typed array object
     */
public static TypedArrayObject TypedArraySpeciesCreate(ExecutionContext cx, TypedArrayObject exemplar, Object... args) {
    /* step 1 (implicit) */
    /* step 2 */
    Intrinsics defaultConstructor = exemplar.getElementType().getConstructor();
    /* step 3 */
    Constructor constructor = SpeciesConstructor(cx, exemplar, defaultConstructor);
    /* step 4 */
    return TypedArrayCreate(cx, constructor, args);
}

Example 4 with SpeciesConstructor

use of com.github.anba.es6draft.runtime.AbstractOperations.SpeciesConstructor in project es6draft by anba.

the class TypedArrayConstructor method constructWithTypedArray.

/**
     * 22.2.4.3 TypedArray ( typedArray )
     * 
     * @param cx
     *            the execution context
     * @param newTarget
     *            the NewTarget constructor object
     * @param typedArray
     *            the source typed array object
     * @return the typed array object
     */
private TypedArrayObject constructWithTypedArray(ExecutionContext cx, Constructor newTarget, TypedArrayObject typedArray) {
    /* step 1 (implicit) */
    /* step 2 (not applicable) */
    /* steps 3-4 (TypedArray allocation deferred) */
    ScriptObject proto = GetPrototypeFromConstructor(cx, newTarget, prototypeForType(elementType));
    /* step 5 */
    TypedArrayObject srcArray = typedArray;
    /* step 6 */
    ArrayBuffer srcData = srcArray.getBuffer();
    /* step 7 */
    if (IsDetachedBuffer(srcData)) {
        throw newTypeError(cx, Messages.Key.BufferDetached);
    }
    /* steps 8-9 */
    ElementType elementType = this.elementType;
    /* step 10 */
    long elementLength = srcArray.getArrayLength();
    /* steps 11-12 */
    ElementType srcType = srcArray.getElementType();
    /* step 13 */
    int srcElementSize = srcType.size();
    /* step 14 */
    long srcByteOffset = srcArray.getByteOffset();
    /* step 15 */
    int elementSize = elementType.size();
    /* step 16 */
    long byteLength = elementSize * elementLength;
    /* steps 17-18 */
    ArrayBufferObject data;
    if (elementType == srcType) {
        /* step 17 */
        data = CloneArrayBuffer(cx, srcData, srcByteOffset);
    } else {
        /* step 18 */
        /* step 18.a */
        // FIXME: spec bug - SharedArrayBuffers not handled correctly!
        Constructor bufferConstructor = SpeciesConstructor(cx, srcData, Intrinsics.ArrayBuffer);
        /* step 18.b */
        data = AllocateArrayBuffer(cx, bufferConstructor, byteLength);
        /* step 18.c */
        if (IsDetachedBuffer(srcData)) {
            throw newTypeError(cx, Messages.Key.BufferDetached);
        }
        /* step 18.d */
        long srcByteIndex = srcByteOffset;
        /* step 18.e */
        long targetByteIndex = 0;
        /* steps 18.f-g */
        for (long count = elementLength; count > 0; --count) {
            double value = GetValueFromBuffer(srcData, srcByteIndex, srcType);
            SetValueInBuffer(data, targetByteIndex, elementType, value);
            srcByteIndex += srcElementSize;
            targetByteIndex += elementSize;
        }
    }
    /* steps 4, 19-23 */
    return new TypedArrayObject(cx.getRealm(), elementType, data, byteLength, 0, elementLength, proto);
}