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MapToUByte.java
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MapToUByte.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://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.
*/
package org.apache.sysds.runtime.compress.colgroup.mapping;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Arrays;
import org.apache.sysds.runtime.compress.colgroup.mapping.MapToFactory.MAP_TYPE;
public class MapToUByte extends MapToByte {
private static final long serialVersionUID = -2498505439667351828L;
protected MapToUByte(int size) {
this(127, size);
}
public MapToUByte(int unique, int size) {
super(Math.min(unique, 127), new byte[size]);
}
protected MapToUByte(int unique, byte[] data) {
super(unique, data);
}
@Override
public MAP_TYPE getType() {
return MapToFactory.MAP_TYPE.UBYTE;
}
@Override
public int getIndex(int n) {
return _data[n];
}
@Override
public int setAndGet(int n, int v) {
return _data[n] = (byte) v;
}
@Override
public void fill(int v) {
Arrays.fill(_data, (byte) (v % 128));
}
public static long getInMemorySize(int dataLength) {
return MapToByte.getInMemorySize(dataLength);
}
@Override
public void write(DataOutput out) throws IOException {
out.writeByte(MAP_TYPE.UBYTE.ordinal());
super.writeBytes(out);
}
protected static MapToUByte readFields(DataInput in) throws IOException {
int unique = in.readInt();
final int length = in.readInt();
final byte[] data = new byte[length];
for(int i = 0; i < length; i++)
data[i] = in.readByte();
return new MapToUByte(unique, data);
}
@Override
public void replace(int v, int r) {
byte cv = (byte) v;
byte rv = (byte) (r % 128);
for(int i = 0; i < size(); i++)
if(_data[i] == cv)
_data[i] = rv;
}
@Override
protected void preAggregateDenseToRowBy8(double[] mV, double[] preAV, int cl, int cu, int off) {
final int h = (cu - cl) % 8;
off += cl;
for(int rc = cl; rc < cl + h; rc++, off++)
preAV[getIndex(rc)] += mV[off];
for(int rc = cl + h; rc < cu; rc += 8, off += 8)
preAggregateDenseToRowVec8(mV, preAV, rc, off);
}
@Override
protected void preAggregateDenseToRowVec8(double[] mV, double[] preAV, int rc, int off) {
preAV[getIndex(rc)] += mV[off];
preAV[getIndex(rc + 1)] += mV[off + 1];
preAV[getIndex(rc + 2)] += mV[off + 2];
preAV[getIndex(rc + 3)] += mV[off + 3];
preAV[getIndex(rc + 4)] += mV[off + 4];
preAV[getIndex(rc + 5)] += mV[off + 5];
preAV[getIndex(rc + 6)] += mV[off + 6];
preAV[getIndex(rc + 7)] += mV[off + 7];
}
@Override
public int getUpperBoundValue() {
return 127;
}
@Override
public int[] getCounts(int[] ret) {
for(int i = 0; i < _data.length; i++)
ret[_data[i]]++;
return ret;
}
@Override
public int getMaxPossible() {
return 128;
}
@Override
public AMapToData resize(int unique) {
final int size = _data.length;
if(unique <= 1)
return new MapToZero(size);
else if(unique == 2 && size > 32) {
AMapToData ret = new MapToBit(unique, size);
ret.copy(this);
return ret;
}
else {
setUnique(unique);
return this;
}
}
}