/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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namespace HH.WMS.Utils.NPOI.SS.Formula.Atp
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{
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using HH.WMS.Utils.NPOI.SS.Formula.Functions;
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using HH.WMS.Utils.NPOI.SS.Formula.Eval;
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using System;
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/**
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* Implementation of Excel 'Analysis ToolPak' function MROUND()<br/>
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*
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* Returns a number rounded to the desired multiple.<p/>
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*
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* <b>Syntax</b><br/>
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* <b>MROUND</b>(<b>number</b>, <b>multiple</b>)
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*
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* <p/>
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*
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* @author Yegor Kozlov
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*/
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class MRound : FreeRefFunction
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{
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public static FreeRefFunction Instance = new MRound();
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private MRound()
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{
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// enforce singleton
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}
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public ValueEval Evaluate(ValueEval[] args, OperationEvaluationContext ec)
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{
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double number, multiple, result;
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if (args.Length != 2)
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{
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return ErrorEval.VALUE_INVALID;
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}
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try
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{
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number = OperandResolver.CoerceValueToDouble(OperandResolver.GetSingleValue(args[0], ec.RowIndex, ec.ColumnIndex));
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multiple = OperandResolver.CoerceValueToDouble(OperandResolver.GetSingleValue(args[1], ec.RowIndex, ec.ColumnIndex));
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if (multiple == 0.0)
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{
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result = 0.0;
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}
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else
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{
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if (number * multiple < 0)
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{
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// Returns #NUM! because the number and the multiple have different signs
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throw new EvaluationException(ErrorEval.NUM_ERROR);
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}
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result = multiple * Math.Round(number / multiple, MidpointRounding.AwayFromZero);
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}
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NumericFunction.CheckValue(result);
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return new NumberEval(result);
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}
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catch (EvaluationException e)
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{
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return e.GetErrorEval();
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}
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}
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}
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}
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