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Java > Open Source Codes > net > sf > retrotranslator > runtime > java > math > _BigDecimal


1 /***
2  * Retrotranslator: a Java bytecode transformer that translates Java classes
3  * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
4  *
5  * Copyright (c) 2005 - 2007 Taras Puchko
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the copyright holders nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */

32 package net.sf.retrotranslator.runtime.java.math;
33
34 import java.math.*;
35 import net.sf.retrotranslator.runtime.impl.Advanced;
36
37 /**
38  * @author Taras Puchko
39  */

40 public class _BigDecimal {
41
42     public static final BigDecimal ZERO = BigDecimal.valueOf(0);
43     public static final BigDecimal ONE = BigDecimal.valueOf(1);
44     public static final BigDecimal TEN = BigDecimal.valueOf(10);
45
46     public static BigInteger convertConstructorArguments(int value) {
47         return BigInteger.valueOf(value);
48     }
49
50     public static BigInteger convertConstructorArguments(long value) {
51         return BigInteger.valueOf(value);
52     }
53
54     public static BigDecimal[] divideAndRemainder(BigDecimal dividend, BigDecimal divisor) {
55         BigDecimal[] result = new BigDecimal[2];
56         BigDecimal quotient = divideToIntegralValue(dividend, divisor);
57         result[0] = quotient;
58         result[1] = dividend.subtract(quotient.multiply(divisor));
59         return result;
60     }
61
62     public static BigDecimal divideToIntegralValue(BigDecimal dividend, BigDecimal divisor) {
63         BigDecimal quotient = dividend.divide(divisor, 0, BigDecimal.ROUND_DOWN);
64         if (dividend.scale() > divisor.scale()) {
65             quotient = quotient.setScale(dividend.scale() - divisor.scale());
66         }
67         return quotient;
68     }
69
70     public static BigDecimal pow(BigDecimal bigDecimal, int n) {
71         if (n < 0 || n > 999999999) {
72             throw new ArithmeticException JavaDoc("Invalid operation");
73         }
74         BigDecimal result = ONE;
75         while (n-- > 0) {
76             result = result.multiply(bigDecimal);
77         }
78         return result;
79     }
80
81     public static BigDecimal remainder(BigDecimal dividend, BigDecimal divisor) {
82         return dividend.subtract(divideToIntegralValue(dividend, divisor).multiply(divisor));
83     }
84
85     @Advanced
86     public static BigDecimal setScale(BigDecimal bigDecimal, int newScale, int roundingMode) {
87         if (newScale >= 0) {
88             return bigDecimal.setScale(newScale, roundingMode);
89         }
90         return bigDecimal.movePointRight(newScale).setScale(0, roundingMode).movePointLeft(newScale);
91     }
92
93     public static String JavaDoc toPlainString(BigDecimal bigDecimal) {
94         return bigDecimal.toString();
95     }
96
97     public static BigDecimal valueOf(double val) {
98         return new BigDecimal(Double.toString(val));
99     }
100
101     public static BigDecimal valueOf(long val) {
102         return BigDecimal.valueOf(val, 0);
103     }
104
105
106 }
107
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