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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
Numbers.java | 0% | 0% | 0% | 0% |
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/*
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$Id: Numbers.java,v 1.3 2004/04/07 20:19:20 cpoirier Exp $
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Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
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Redistribution and use of this software and associated documentation
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("Software"), with or without modification, are permitted provided
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that the following conditions are met:
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1. Redistributions of source code must retain copyright
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statements and notices. Redistributions must also contain a
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copy of this document.
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2. Redistributions in binary form must reproduce the
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above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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3. The name "groovy" must not be used to endorse or promote
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products derived from this Software without prior written
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permission of The Codehaus. For written permission,
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please contact info@codehaus.org.
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4. Products derived from this Software may not be called "groovy"
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nor may "groovy" appear in their names without prior written
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permission of The Codehaus. "groovy" is a registered
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trademark of The Codehaus.
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5. Due credit should be given to The Codehaus -
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http://groovy.codehaus.org/
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THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
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NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.codehaus.groovy.syntax;
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import java.math.BigInteger;
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import java.math.BigDecimal;
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/**
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* Helper class for processing Groovy numeric literals.
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*
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* @author Brian Larson
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* @author <a href="mailto:cpoirier@dreaming.org">Chris Poirier</a>
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*
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* @version $Id: Numbers.java,v 1.3 2004/04/07 20:19:20 cpoirier Exp $
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*/
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public class Numbers |
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{ |
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//---------------------------------------------------------------------------
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// LEXING SUPPORT
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/**
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* Returns true if the specified character is a base-10 digit.
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*/
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public static boolean isDigit( char c ) |
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{ |
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return c >= '0' && c <= '9';
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} |
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/**
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* Returns true if the specific character is a base-8 digit.
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*/
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public static boolean isOctalDigit( char c ) |
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{ |
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return c >= '0' && c <= '7';
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} |
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/**
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* Returns true if the specified character is a base-16 digit.
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*/
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public static boolean isHexDigit( char c ) |
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{ |
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return isDigit(c) || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f');
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} |
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/**
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* Returns true if the specified character is a valid type specifier
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* for a numeric value.
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*/
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public static boolean isNumericTypeSpecifier( char c, boolean isDecimal ) |
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{ |
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if( isDecimal )
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{ |
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switch( c )
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{ |
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case 'G':
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case 'g':
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case 'D':
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case 'd':
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case 'F':
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case 'f':
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return true; |
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} |
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} |
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else
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{ |
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switch( c )
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{ |
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case 'G':
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case 'g':
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case 'I':
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case 'i':
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case 'L':
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case 'l':
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return true; |
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} |
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} |
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return false; |
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} |
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//---------------------------------------------------------------------------
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// PARSING SUPPORT
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private static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE); |
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private static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE); |
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private static final BigInteger MAX_INTEGER = BigInteger.valueOf(Integer.MAX_VALUE); |
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private static final BigInteger MIN_INTEGER = BigInteger.valueOf(Integer.MIN_VALUE); |
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private static final BigDecimal MAX_DOUBLE = new BigDecimal(String.valueOf(Double.MAX_VALUE)); |
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private static final BigDecimal MIN_DOUBLE = MAX_DOUBLE.negate(); |
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private static final BigDecimal MAX_FLOAT = new BigDecimal(String.valueOf(Float.MAX_VALUE)); |
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private static final BigDecimal MIN_FLOAT = MAX_FLOAT.negate(); |
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/**
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* Builds a Number from the given integer descriptor. Creates the narrowest
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* type possible, or a specific type, if specified.
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*
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* @param text literal text to parse
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* @return instantiated Number object
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* @throws NumberFormatException if the number does not fit within the type
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* requested by the type specifier suffix (invalid numbers don't make
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* it here)
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*/
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public static Number parseInteger( String text ) |
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{ |
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char c = ' ';
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int length = text.length();
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//
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// Strip off the sign, if present
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boolean negative = false; |
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if( (c = text.charAt(0)) == '-' || c == '+' )
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{ |
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negative = (c == '-'); |
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text = text.substring( 1, length ); |
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length -= 1; |
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} |
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//
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// Determine radix (default is 10).
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int radix = 10;
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if( text.charAt(0) == '0' && length > 1 )
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{ |
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if( (c = text.charAt(1)) == 'X' || c == 'x' )
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{ |
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radix = 16; |
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text = text.substring( 2, length); |
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length -= 2; |
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} |
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else
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{ |
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radix = 8; |
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} |
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} |
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//
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// Strip off any type specifier and convert it to lower
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// case, if present.
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char type = 'x'; // pick best fit |
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if( isNumericTypeSpecifier(text.charAt(length-1), false) ) |
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{ |
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type = Character.toLowerCase( text.charAt(length-1) ); |
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text = text.substring( 0, length-1); |
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length -= 1; |
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} |
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//
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// Add the sign back, if necessary
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if( negative )
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{ |
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text = "-" + text;
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} |
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//
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// Build the specified type or, if no type was specified, the
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// smallest type in which the number will fit.
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switch (type)
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{ |
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case 'i':
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return new Integer( Integer.parseInt(text, radix) ); |
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case 'l':
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return new Long( Long.parseLong(text, radix) ); |
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case 'g':
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return new BigInteger( text, radix ); |
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default:
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//
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// If not specified, we will return the narrowest possible
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// of Integer, Long, and BigInteger.
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BigInteger value = new BigInteger( text, radix );
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if( value.compareTo(MAX_INTEGER) <= 0 && value.compareTo(MIN_INTEGER) >= 0 )
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{ |
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return new Integer(value.intValue()); |
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} |
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else if( value.compareTo(MAX_LONG) <= 0 && value.compareTo(MIN_LONG) >= 0 ) |
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{ |
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return new Long(value.longValue()); |
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} |
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return value;
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} |
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} |
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/**
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* Builds a Number from the given decimal descriptor. Uses BigDecimal,
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* unless, Double or Float is requested.
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*
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* @param text literal text to parse
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* @return instantiated Number object
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* @throws NumberFormatException if the number does not fit within the type
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* requested by the type specifier suffix (invalid numbers don't make
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* it here)
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*/
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public static Number parseDecimal( String text ) |
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{ |
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int length = text.length();
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//
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// Strip off any type specifier and convert it to lower
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// case, if present.
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289 | 0 |
char type = 'x';
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290 | 0 |
if( isNumericTypeSpecifier(text.charAt(length-1), true) ) |
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{ |
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type = Character.toLowerCase( text.charAt(length-1) ); |
293 | 0 |
text = text.substring( 0, length-1 ); |
294 |
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295 | 0 |
length -= 1; |
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} |
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//
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// Build the specified type or default to BigDecimal
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BigDecimal value = new BigDecimal( text );
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switch( type )
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{ |
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case 'f':
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306 | 0 |
if( value.compareTo(MAX_FLOAT) <= 0 && value.compareTo(MIN_FLOAT) >= 0)
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{ |
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308 | 0 |
return new Float( text ); |
309 |
} |
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310 | 0 |
throw new NumberFormatException( "out of range" ); |
311 |
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case 'd':
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313 | 0 |
if( value.compareTo(MAX_DOUBLE) <= 0 && value.compareTo(MIN_DOUBLE) >= 0)
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{ |
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315 | 0 |
return new Double( text ); |
316 |
} |
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317 | 0 |
throw new NumberFormatException( "out of range" ); |
318 |
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case 'g':
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default:
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321 | 0 |
return value;
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} |
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} |
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} |
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