1 /**
2  * Copyright (c) 2004-2011 QOS.ch
3  * All rights reserved.
4  *
5  * Permission is hereby granted, free  of charge, to any person obtaining
6  * a  copy  of this  software  and  associated  documentation files  (the
7  * "Software"), to  deal in  the Software without  restriction, including
8  * without limitation  the rights to  use, copy, modify,  merge, publish,
9  * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10  * permit persons to whom the Software  is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The  above  copyright  notice  and  this permission  notice  shall  be
14  * included in all copies or substantial portions of the Software.
15  *
16  * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17  * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18  * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21  * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  *
24  */
25 package org.slf4j.profiler;
26 
27 public class SpacePadder {
28     public static final String LINE_SEP = System.getProperty("line.separator");
29 
30     final static String[] SPACES = { " ", "  ", "    ", "        ", // 1,2,4,8
31             // spaces
32             "                ", // 16 spaces
33             "                                " }; // 32 spaces
34 
35     @Deprecated
leftPad(StringBuffer buf, String s, int desiredLength)36     final static public void leftPad(StringBuffer buf, String s, int desiredLength) {
37         int actualLen = 0;
38         if (s != null) {
39             actualLen = s.length();
40         }
41         if (actualLen < desiredLength) {
42             spacePad(buf, desiredLength - actualLen);
43         }
44         if (s != null) {
45             buf.append(s);
46         }
47     }
48 
leftPad(StringBuilder buf, String s, int desiredLength)49     final static public void leftPad(StringBuilder buf, String s, int desiredLength) {
50         int actualLen = 0;
51         if (s != null) {
52             actualLen = s.length();
53         }
54         if (actualLen < desiredLength) {
55             spacePad(buf, desiredLength - actualLen);
56         }
57         if (s != null) {
58             buf.append(s);
59         }
60     }
61 
62     @Deprecated
rightPad(StringBuffer buf, String s, int desiredLength)63     final static public void rightPad(StringBuffer buf, String s, int desiredLength) {
64         int actualLen = 0;
65         if (s != null) {
66             actualLen = s.length();
67         }
68         if (s != null) {
69             buf.append(s);
70         }
71         if (actualLen < desiredLength) {
72             spacePad(buf, desiredLength - actualLen);
73         }
74     }
75 
rightPad(StringBuilder buf, String s, int desiredLength)76     final static public void rightPad(StringBuilder buf, String s, int desiredLength) {
77         int actualLen = 0;
78         if (s != null) {
79             actualLen = s.length();
80         }
81         if (s != null) {
82             buf.append(s);
83         }
84         if (actualLen < desiredLength) {
85             spacePad(buf, desiredLength - actualLen);
86         }
87     }
88 
89     /**
90      * Fast space padding method.
91      *
92      * @param sbuf the buffer to pad
93      * @param length the target size of the buffer after padding
94      */
95     @Deprecated
spacePad(StringBuffer sbuf, int length)96     final static public void spacePad(StringBuffer sbuf, int length) {
97         while (length >= 32) {
98             sbuf.append(SPACES[5]);
99             length -= 32;
100         }
101 
102         for (int i = 4; i >= 0; i--) {
103             if ((length & (1 << i)) != 0) {
104                 sbuf.append(SPACES[i]);
105             }
106         }
107     }
108 
109     /**
110      * Fast space padding method.
111      *
112      * @param sbuf the buffer to pad
113      * @param length the target size of the buffer after padding
114      */
spacePad(StringBuilder sbuf, int length)115     final static public void spacePad(StringBuilder sbuf, int length) {
116         while (length >= 32) {
117             sbuf.append(SPACES[5]);
118             length -= 32;
119         }
120 
121         for (int i = 4; i >= 0; i--) {
122             if ((length & (1 << i)) != 0) {
123                 sbuf.append(SPACES[i]);
124             }
125         }
126     }
127 }
128