| /* ==================================================================== |
| 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.poi.ss.formula.functions; |
| |
| /** |
| * @author Amol S. Deshmukh < amolweb at ya hoo dot com > |
| * |
| */ |
| public final class Odd extends NumericFunction.OneArg { |
| private static final long PARITY_MASK = 0xFFFFFFFFFFFFFFFEL; |
| |
| protected double evaluate(double d) { |
| if (d==0) { |
| return 1; |
| } |
| return (d>0) ? calcOdd(d) : -calcOdd(-d); |
| } |
| |
| private static long calcOdd(double d) { |
| double dpm1 = d+1; |
| long x = ((long) dpm1) & PARITY_MASK; |
| return ( Double.compare(x, dpm1) == 0 ) ? x-1 : x+1; |
| } |
| } |