01: /*
02: * Copyright (c) 2001-2007, Jean Tessier
03: * All rights reserved.
04: *
05: * Redistribution and use in source and binary forms, with or without
06: * modification, are permitted provided that the following conditions
07: * are met:
08: *
09: * * Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * * Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * * Neither the name of Jean Tessier nor the names of his contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
24: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: package com.jeantessier.classreader;
34:
35: public class BitFormat {
36: public static final int DEFAULT_MAX_LENGTH = 32;
37: public static final int DEFAULT_GROUP_SIZE = 8;
38: public static final char DEFAULT_GROUP_SEPARATOR = ' ';
39:
40: private int maxLength;
41: private int groupSize;
42: private char groupSeparator;
43:
44: public BitFormat() {
45: this (DEFAULT_MAX_LENGTH, DEFAULT_GROUP_SIZE,
46: DEFAULT_GROUP_SEPARATOR);
47: }
48:
49: public BitFormat(int maxLength) {
50: this (maxLength, DEFAULT_GROUP_SIZE, DEFAULT_GROUP_SEPARATOR);
51: }
52:
53: public BitFormat(int maxLength, int groupSize) {
54: this (maxLength, groupSize, DEFAULT_GROUP_SEPARATOR);
55: }
56:
57: public BitFormat(int maxLength, int groupSize, char groupSeparator) {
58: this .maxLength = maxLength;
59: this .groupSize = groupSize;
60: this .groupSeparator = groupSeparator;
61: }
62:
63: public String format(int n) {
64: return format(Integer.toBinaryString(n).toCharArray());
65: }
66:
67: public String format(long n) {
68: return format(Long.toBinaryString(n).toCharArray());
69: }
70:
71: private String format(char[] binaryString) {
72: StringBuffer result = new StringBuffer();
73:
74: for (int i = 0; i < maxLength; i++) {
75: if (((maxLength - i) % groupSize == 0) && i > 0) {
76: result.append(groupSeparator);
77: }
78:
79: if (i < maxLength - binaryString.length) {
80: result.append('0');
81: } else {
82: result.append(binaryString[binaryString.length
83: - maxLength + i]);
84: }
85: }
86:
87: return result.toString();
88: }
89: }
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