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/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.api.ndarray;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.nd4j.linalg.primitives.Pair;
import org.nd4j.linalg.api.buffer.DataBuffer;
import org.nd4j.linalg.api.shape.Shape;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.linalg.util.ArrayUtil;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author [email protected]
*/
@Slf4j
public abstract class BaseShapeInfoProvider implements ShapeInfoProvider {
protected AtomicLong bytes = new AtomicLong(0);
/**
* This method creates shapeInformation buffer, based on shape being passed in
*
* @param shape
* @return
*/
@Override
public Pair createShapeInformation(int[] shape) {
char order = Nd4j.order();
return createShapeInformation(shape, order);
}
/**
* This method creates shapeInformation buffer, based on shape & order being passed in
*
* @param shape
* @param order
* @return
*/
@Override
public Pair createShapeInformation(int[] shape, char order) {
int[] stride = Nd4j.getStrides(shape, order);
// this won't be view, so ews is 1
int ews = 1;
return createShapeInformation(shape, stride, 0, ews, order);
}
@Override
public Pair createShapeInformation(int[] shape, int[] stride, long offset, int elementWiseStride, char order) {
DataBuffer buffer = Shape.createShapeInformation(ArrayUtil.toLongArray(shape), ArrayUtil.toLongArray(stride), offset, (long) elementWiseStride, order);
buffer.setConstant(true);
return Pair.create(buffer, buffer.asLong());
}
/**
* This method creates shapeInformation buffer, based on detailed shape information being passed in
*
* @param shape
* @param stride
* @param offset
* @param elementWiseStride
* @param order
* @param extras
* @return
*/
@Override
public Pair createShapeInformation(int[] shape, int[] stride, long offset, int elementWiseStride, char order, long extras) {
DataBuffer buffer = Shape.createShapeInformation(ArrayUtil.toLongArray(shape), ArrayUtil.toLongArray(stride), offset, (long) elementWiseStride, order);
buffer.put(buffer.length() - 3, extras);
buffer.setConstant(true);
return Pair.create(buffer, buffer.asLong());
}
@Override
public Pair createShapeInformation(long[] shape, long[] stride, long offset, long elementWiseStride, char order, long extras) {
DataBuffer buffer = Shape.createShapeInformation(shape, stride, offset, elementWiseStride, order);
buffer.put(buffer.length() - 3, extras);
buffer.setConstant(true);
return Pair.create(buffer, buffer.asLong());
}
/**
* This method creates shapeInformation buffer, based on shape being passed in
*
* @param shape
* @return
*/
@Override
public Pair createShapeInformation(long[] shape) {
char order = Nd4j.order();
return createShapeInformation(shape, order);
}
/**
* This method creates shapeInformation buffer, based on shape & order being passed in
*
* @param shape
* @param order
* @return
*/
@Override
public Pair createShapeInformation(long[] shape, char order) {
long[] stride = Nd4j.getStrides(shape, order);
// this won't be view, so ews is 1
int ews = 1;
return createShapeInformation(shape, stride, 0, ews, order);
}
@Override
public Pair createShapeInformation(long[] shape, long[] stride, long offset, long elementWiseStride, char order) {
DataBuffer buffer = Shape.createShapeInformation(shape, stride, offset, elementWiseStride, order);
buffer.setConstant(true);
return Pair.create(buffer, buffer.asLong());
}
@Override
public long getCachedBytes() {
return bytes.get();
}
}
