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Java > Open Source Codes > net > sf > retrotranslator > runtime > format > NumericConversion


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.format;
33
34 import java.text.DecimalFormatSymbols JavaDoc;
35
36 /**
37  * @author Taras Puchko
38  */

39 abstract class NumericConversion extends Conversion {
40
41     protected static void appendNumber(StringBuilder JavaDoc builder, String JavaDoc number,
42                                        boolean groupingUsed, DecimalFormatSymbols JavaDoc symbols) {
43         for (int i = 0; i < number.length(); i++) {
44             if (groupingUsed && i > 0 && (number.length() - i) % 3 == 0) {
45                 builder.append(symbols.getGroupingSeparator());
46             }
47             builder.append((char) (symbols.getZeroDigit() - '0' + number.charAt(i)));
48         }
49     }
50
51     protected static boolean printSpecialNumber(FormatContext context, double argument) {
52         if (Double.isNaN(argument)) {
53             context.writePadded("NaN");
54             return true;
55         }
56         if (argument == Double.POSITIVE_INFINITY) {
57             context.writePadded(context.isFlag('+') ? "+Infinity" : "Infinity");
58             return true;
59         }
60         if (argument == Double.NEGATIVE_INFINITY) {
61             context.writePadded(context.isFlag('(') ? "(Infinity)" : "-Infinity");
62             return true;
63         }
64         return false;
65     }
66
67     protected static void printNumber(FormatContext context, boolean negative, String JavaDoc prefix,
68                                       StringBuilder JavaDoc argument, DecimalFormatSymbols JavaDoc symbols) {
69         StringBuilder JavaDoc builder = new StringBuilder JavaDoc();
70         if (negative) {
71             if (context.isFlag('(')) {
72                 builder.append('(');
73                 argument.append(')');
74             } else {
75                 builder.append('-');
76             }
77         } else {
78             if (context.isFlag('+')) {
79                 builder.append('+');
80             } else if (context.isFlag(' ')) {
81                 builder.append(' ');
82             }
83         }
84         if (prefix != null) {
85             builder.append(prefix);
86         }
87         if (context.isFlag('0')) {
88             int count = context.getWidth() - builder.length() - argument.length();
89             for (int i = 0; i < count; i++) {
90                 builder.append(symbols.getZeroDigit());
91             }
92         }
93         context.writePadded(builder.append(argument).toString());
94     }
95
96 }
97
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