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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
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  
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
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  
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
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    */
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 }