/* ==================================================================== | |
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; | |
import org.apache.poi.ss.formula.OperationEvaluationContext; | |
import org.apache.poi.ss.formula.eval.ErrorEval; | |
import org.apache.poi.ss.formula.eval.NumberEval; | |
import org.apache.poi.ss.formula.eval.OperandResolver; | |
import org.apache.poi.ss.formula.eval.ValueEval; | |
/** | |
* <p>Implementation for Excel Oct2Dec() function.<p/> | |
* <p> | |
* Converts an octal number to decimal. | |
* </p> | |
* <p> | |
* <b>Syntax</b>:<br/> <b>Oct2Dec </b>(<b>number</b> ) | |
* </p> | |
* <p/> | |
* Number is the octal number you want to convert. Number may not contain more than 10 octal characters (30 bits). | |
* The most significant bit of number is the sign bit. The remaining 29 bits are magnitude bits. | |
* Negative numbers are represented using two's-complement notation.. | |
* <p/> | |
* If number is not a valid octal number, OCT2DEC returns the #NUM! error value. | |
* | |
* @author cedric dot walter @ gmail dot com | |
*/ | |
public class Oct2Dec extends Fixed1ArgFunction implements FreeRefFunction { | |
public static final FreeRefFunction instance = new Oct2Dec(); | |
static final int MAX_NUMBER_OF_PLACES = 10; | |
static final int OCTAL_BASE = 8; | |
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval numberVE) { | |
String octal = OperandResolver.coerceValueToString(numberVE); | |
try { | |
return new NumberEval(BaseNumberUtils.convertToDecimal(octal, OCTAL_BASE, MAX_NUMBER_OF_PLACES)); | |
} catch (IllegalArgumentException e) { | |
return ErrorEval.NUM_ERROR; | |
} | |
} | |
public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) { | |
if (args.length != 1) { | |
return ErrorEval.VALUE_INVALID; | |
} | |
return evaluate(ec.getRowIndex(), ec.getColumnIndex(), args[0]); | |
} | |
} |