/** Calls {@code DoubleRawIndexer(pointer, { pointer.limit() - pointer.position() }, { 1 })}. */ public DoubleRawIndexer(DoublePointer pointer) { this(pointer, new long[] { pointer.limit() - pointer.position() }, ONE_STRIDE); }
/** Returns {@code create(pointer, { pointer.limit() - pointer.position() }, { 1 }, true)} */ public static DoubleIndexer create(DoublePointer pointer) { return create(pointer, new long[] { pointer.limit() - pointer.position() }, ONE_STRIDE); }
/** Constructor to set the {@link #pointer}, {@link #sizes} and {@link #strides}. */ public DoubleRawIndexer(DoublePointer pointer, long[] sizes, long[] strides) { super(sizes, strides); this.pointer = pointer; base = pointer.address() + pointer.position() * VALUE_BYTES; size = pointer.limit() - pointer.position(); }
/** * @param doublePointer * @param length * @return */ @Override public DataBuffer create(DoublePointer doublePointer, long length) { doublePointer.capacity(length); doublePointer.limit(length); doublePointer.position(0); return new DoubleBuffer(doublePointer, DoubleIndexer.create(doublePointer), length); }
/** * Creates a double indexer to access efficiently the data of a pointer. * * @param pointer data to access via a buffer or to copy to an array * @param direct {@code true} to use a direct buffer, see {@link Indexer} for details * @return the new double indexer backed by the raw memory interface, a buffer, or an array */ public static DoubleIndexer create(final DoublePointer pointer, long[] sizes, long[] strides, boolean direct) { if (direct) { return Raw.getInstance() != null ? new DoubleRawIndexer(pointer, sizes, strides) : new DoubleBufferIndexer(pointer.asBuffer(), sizes, strides); } else { final long position = pointer.position(); double[] array = new double[(int)Math.min(pointer.limit() - position, Integer.MAX_VALUE)]; pointer.get(array); return new DoubleArrayIndexer(array, sizes, strides) { @Override public void release() { pointer.position(position).put(array); super.release(); } }; } }
/** * For direct buffers, calls {@link Pointer#Pointer(Buffer)}, while for buffers * backed with an array, allocates enough memory for the array and copies it. * * @param buffer the Buffer to reference or copy * @see #put(double[]) */ public DoublePointer(DoubleBuffer buffer) { super(buffer); if (buffer != null && !buffer.isDirect() && buffer.hasArray()) { double[] array = buffer.array(); allocateArray(array.length - buffer.arrayOffset()); put(array, buffer.arrayOffset(), array.length - buffer.arrayOffset()); position(buffer.position()); limit(buffer.limit()); } } /**