/*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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.Functions
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{
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using System;
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using HH.WMS.Utils.NPOI.SS.Formula.Eval;
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using System.Globalization;
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using HH.WMS.Utils.NPOI.SS.UserModel;
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/**
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* @author Pavel Krupets (pkrupets at palmtreebusiness dot com)
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*/
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public class DateFunc : Fixed3ArgFunction
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{
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public static Function instance = new DateFunc();
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private DateFunc()
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{
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}
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public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1,ValueEval arg2)
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{
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double result;
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try
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{
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double d0 = NumericFunction.SingleOperandEvaluate(arg0, srcRowIndex, srcColumnIndex);
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double d1 = NumericFunction.SingleOperandEvaluate(arg1, srcRowIndex, srcColumnIndex);
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double d2 = NumericFunction.SingleOperandEvaluate(arg2, srcRowIndex, srcColumnIndex);
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result = Evaluate(GetYear(d0), (int)d1, (int)d2);
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NumericFunction.CheckValue(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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return new NumberEval(result);
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}
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public double Evaluate(int year, int month, int day)
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{
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if (year < 0 || month < 0 || day < 0)
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{
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throw new EvaluationException(ErrorEval.VALUE_INVALID);
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}
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if (year == 1900 && month == 2 && day == 29)
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{
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return 60.0;
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}
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//see Microsoft KB214326
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//http://support.microsoft.com/kb/214326/en-us
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if (year == 1900)
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{
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if ((month == 1 && day >= 60) ||
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(month == 2 && day >= 30))
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{
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day--;
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}
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}
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return DateUtil.GetExcelDate(year, month, day, 0, 0, 0, false); // XXX fix 1900/1904 problem
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}
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private int GetYear(double d)
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{
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int year = (int)d;
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if (year < 0)
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{
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return -1;
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}
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return year < 1900 ? 1900 + year : year;
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}
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}
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}
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