1 package org.djutils.decoderdumper;
2
3 import java.io.IOException;
4
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15
16 public class HexDecoder implements Decoder
17 {
18
19 private final String prototypeLine;
20
21
22 private int fieldsPerLine;
23
24
25 private final int extraSpaceAfterEvery;
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32
33 public HexDecoder(final int fieldsPerLine, final int extraSpaceAfterEvery)
34 {
35 this.fieldsPerLine = fieldsPerLine;
36 this.extraSpaceAfterEvery = extraSpaceAfterEvery > 0 ? extraSpaceAfterEvery : Integer.MAX_VALUE;
37 String format =
38 String.format("%%%ds", fieldsPerLine * 2 + fieldsPerLine - 1 + (fieldsPerLine - 1)
39 / this.extraSpaceAfterEvery);
40 this.prototypeLine = String.format(format, "");
41 }
42
43
44 private StringBuilder buffer = new StringBuilder();
45
46
47 @Override
48 public String getResult()
49 {
50 String result = this.buffer.toString();
51 this.buffer.setLength(0);
52 return result;
53 }
54
55
56 @Override
57 public int getMaximumWidth()
58 {
59 return this.prototypeLine.length();
60 }
61
62
63 @Override
64 public boolean append(int address, byte theByte) throws IOException
65 {
66 if (this.buffer.length() == 0)
67 {
68 this.buffer.append(this.prototypeLine);
69 }
70 int lineByte = address % this.fieldsPerLine;
71 int index = lineByte * 3 + lineByte / this.extraSpaceAfterEvery;
72 this.buffer.replace(index, index + 2, String.format("%02x", theByte));
73 return lineByte == this.fieldsPerLine - 1;
74 }
75
76
77 @Override
78 public boolean ignoreForIdenticalOutputCheck()
79 {
80 return false;
81 }
82
83
84 @Override
85 public String toString()
86 {
87 return "HexDecoder [buffer=" + this.buffer + "]";
88 }
89
90 }