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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.poi.ss.formula.atp;
-
- import org.apache.poi.ss.formula.OperationEvaluationContext;
- import org.apache.poi.ss.formula.eval.*;
- import org.apache.poi.ss.formula.functions.FreeRefFunction;
- import org.apache.poi.ss.formula.functions.NumericFunction;
-
- /**
- * Implementation of Excel 'Analysis ToolPak' function MROUND()<br>
- *
- * Returns a number rounded to the desired multiple.<p>
- *
- * <b>Syntax</b><br>
- * <b>MROUND</b>(<b>number</b>, <b>multiple</b>)
- */
- final class MRound implements FreeRefFunction {
-
- public static final FreeRefFunction instance = new MRound();
-
- private MRound() {
- // enforce singleton
- }
-
- public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
- double number, multiple, result;
-
- if (args.length != 2) {
- return ErrorEval.VALUE_INVALID;
- }
-
- try {
- number = OperandResolver.coerceValueToDouble(OperandResolver.getSingleValue(args[0], ec.getRowIndex(), ec.getColumnIndex()));
- multiple = OperandResolver.coerceValueToDouble(OperandResolver.getSingleValue(args[1], ec.getRowIndex(), ec.getColumnIndex()));
-
- if( multiple == 0.0 ) {
- result = 0.0;
- } else {
- if(number*multiple < 0) {
- // Returns #NUM! because the number and the multiple have different signs
- throw new EvaluationException(ErrorEval.NUM_ERROR);
- }
- result = multiple * Math.round( number / multiple );
- }
- NumericFunction.checkValue(result);
- return new NumberEval(result);
- } catch (EvaluationException e) {
- return e.getErrorEval();
- }
- }
- }
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