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14 package ch.qos.logback.core.pattern;
15
16 public class SpacePadder {
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18 final static String[] SPACES = { " ", " ", " ", " ",
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20 " ",
21 " " };
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23 final static public void leftPad(StringBuilder buf, String s, int desiredLength) {
24 int actualLen = 0;
25 if (s != null) {
26 actualLen = s.length();
27 }
28 if (actualLen < desiredLength) {
29 spacePad(buf, desiredLength - actualLen);
30 }
31 if (s != null) {
32 buf.append(s);
33 }
34 }
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36 final static public void rightPad(StringBuilder buf, String s, int desiredLength) {
37 int actualLen = 0;
38 if (s != null) {
39 actualLen = s.length();
40 }
41 if (s != null) {
42 buf.append(s);
43 }
44 if (actualLen < desiredLength) {
45 spacePad(buf, desiredLength - actualLen);
46 }
47 }
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52 final static public void spacePad(StringBuilder sbuf, int length) {
53 while (length >= 32) {
54 sbuf.append(SPACES[5]);
55 length -= 32;
56 }
57
58 for (int i = 4; i >= 0; i--) {
59 if ((length & (1 << i)) != 0) {
60 sbuf.append(SPACES[i]);
61 }
62 }
63 }
64 }