diff options
Diffstat (limited to 'src/jdk/nashorn/internal/objects/NativeUint8Array.java')
| -rw-r--r-- | src/jdk/nashorn/internal/objects/NativeUint8Array.java | 133 |
1 files changed, 116 insertions, 17 deletions
diff --git a/src/jdk/nashorn/internal/objects/NativeUint8Array.java b/src/jdk/nashorn/internal/objects/NativeUint8Array.java index 1f304563..6e69ebad 100644 --- a/src/jdk/nashorn/internal/objects/NativeUint8Array.java +++ b/src/jdk/nashorn/internal/objects/NativeUint8Array.java @@ -25,21 +25,29 @@ package jdk.nashorn.internal.objects; +import static jdk.nashorn.internal.codegen.CompilerConstants.specialCall; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.nio.ByteBuffer; import jdk.nashorn.internal.objects.annotations.Attribute; import jdk.nashorn.internal.objects.annotations.Constructor; import jdk.nashorn.internal.objects.annotations.Function; import jdk.nashorn.internal.objects.annotations.Property; import jdk.nashorn.internal.objects.annotations.ScriptClass; import jdk.nashorn.internal.objects.annotations.Where; +import jdk.nashorn.internal.runtime.JSType; import jdk.nashorn.internal.runtime.PropertyMap; import jdk.nashorn.internal.runtime.ScriptObject; import jdk.nashorn.internal.runtime.arrays.ArrayData; +import jdk.nashorn.internal.runtime.arrays.TypedArrayData; /** * Uint8 array for TypedArray extension */ @ScriptClass("Uint8Array") public final class NativeUint8Array extends ArrayBufferView { + /** * The size in bytes of each element in the array. */ @@ -55,31 +63,127 @@ public final class NativeUint8Array extends ArrayBufferView { public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) { return new NativeUint8Array(buffer, byteOffset, length); } + @Override - public ArrayData createArrayData(final NativeArrayBuffer buffer, final int byteOffset, final int length) { - return new Uint8ArrayData(buffer, byteOffset, length); + public Uint8ArrayData createArrayData(final ByteBuffer nb, final int start, final int end) { + return new Uint8ArrayData(nb, start, end); + } + + @Override + public String getClassName() { + return "Uint8Array"; } }; - private static final class Uint8ArrayData extends ArrayDataImpl { - private Uint8ArrayData(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) { - super(buffer, byteOffset, elementLength); + private static final class Uint8ArrayData extends TypedArrayData<ByteBuffer> { + + private static final MethodHandle GET_ELEM = specialCall(MethodHandles.lookup(), Uint8ArrayData.class, "getElem", int.class, int.class).methodHandle(); + private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), Uint8ArrayData.class, "setElem", void.class, int.class, int.class).methodHandle(); + + private Uint8ArrayData(final ByteBuffer nb, final int start, final int end) { + super(((ByteBuffer)nb.position(start).limit(end)).slice(), end - start); + } + + @Override + protected MethodHandle getGetElem() { + return GET_ELEM; + } + + @Override + protected MethodHandle getSetElem() { + return SET_ELEM; + } + + private int getElem(final int index) { + try { + return nb.get(index) & 0xff; + } catch (final IndexOutOfBoundsException e) { + throw new ClassCastException(); //force relink - this works for unoptimistic too + } + } + + private void setElem(final int index, final int elem) { + try { + nb.put(index, (byte)elem); + } catch (final IndexOutOfBoundsException e) { + //swallow valid array indexes. it's ok. + if (index < 0) { + throw new ClassCastException(); + } + } + } + + @Override + public boolean isUnsigned() { + return true; + } + + @Override + public Class<?> getElementType() { + return int.class; } @Override - protected int byteIndex(final int index) { - return index * BYTES_PER_ELEMENT + byteOffset; + public Class<?> getBoxedElementType() { + return Integer.class; } @Override - protected int getIntImpl(final int index) { - return buffer.getByteArray()[byteIndex(index)] & 0xff; + public int getInt(final int index) { + return getElem(index); } @Override - protected void setImpl(final int index, final int value) { - buffer.getByteArray()[byteIndex(index)] = (byte)value; + public int getIntOptimistic(final int index, final int programPoint) { + return getElem(index); } + + @Override + public long getLong(final int index) { + return getInt(index); + } + + @Override + public long getLongOptimistic(final int index, final int programPoint) { + return getElem(index); + } + + @Override + public double getDouble(final int index) { + return getInt(index); + } + + @Override + public double getDoubleOptimistic(final int index, final int programPoint) { + return getElem(index); + } + + @Override + public Object getObject(final int index) { + return getInt(index); + } + + @Override + public ArrayData set(final int index, final Object value, final boolean strict) { + return set(index, JSType.toInt32(value), strict); + } + + @Override + public ArrayData set(final int index, final int value, final boolean strict) { + setElem(index, value); + return this; + } + + @Override + public ArrayData set(final int index, final long value, final boolean strict) { + return set(index, (int)value, strict); + } + + @Override + public ArrayData set(final int index, final double value, final boolean strict) { + return set(index, (int)value, strict); + } + } /** @@ -93,7 +197,7 @@ public final class NativeUint8Array extends ArrayBufferView { */ @Constructor(arity = 1) public static NativeUint8Array constructor(final boolean newObj, final Object self, final Object... args) { - return (NativeUint8Array)constructorImpl(args, FACTORY); + return (NativeUint8Array)constructorImpl(newObj, args, FACTORY); } NativeUint8Array(final NativeArrayBuffer buffer, final int byteOffset, final int length) { @@ -101,11 +205,6 @@ public final class NativeUint8Array extends ArrayBufferView { } @Override - public String getClassName() { - return "Uint8Array"; - } - - @Override protected Factory factory() { return FACTORY; } |