/*
* 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 gobblin.util.request_allocation;
/**
* Basic vector operations. These operations are NOT safe (e.g. no bound checks on vectors), so they are package-private.
*/
class VectorAlgebra {
/**
* Performs x + cy
*/
static double[] addVector(double[] x, double[] y, double c, double[] reuse) {
if (reuse == null) {
reuse = new double[x.length];
}
for (int i = 0; i < x.length; i++) {
reuse[i] = x[i] + c * y[i];
}
return reuse;
}
/**
* Performs c * x
*/
static double[] scale(double[] x, double c, double[] reuse) {
if (reuse == null) {
reuse = new double[x.length];
}
for (int i = 0; i < x.length; i++) {
reuse[i] = c * x[i];
}
return reuse;
}
/**
* @return true if test is larger than reference in any dimension. If orequal is true, then return true if test is larger
* than or equal than reference in any dimension.
*/
static boolean exceedsVector(double[] reference, double[] test, boolean orequal) {
for (int i = 0; i < reference.length; i++) {
if (reference[i] < test[i]) {
return true;
}
if (orequal && reference[i] == test[i]) {
return true;
}
}
return false;
}
}