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1
2 package com.ice.util;
3
4 import java.lang.*;
5 import java.io.*;
6
7
8 public class
9 HexDump
10 {
11 private static final int ROW_BYTES = 16;
12 private static final int ROW_QTR1 = 3;
13 private static final int ROW_HALF = 7;
14 private static final int ROW_QTR2 = 11;
15
16 public static void
17 dumpHexData( PrintStream out, String  title, byte[] buf, int numBytes )
18 {
19 int rows, residue, i, j;
20 byte[] save_buf= new byte[ ROW_BYTES+2 ];
21 byte[] hex_buf = new byte[ 4 ];
22 byte[] idx_buf = new byte[ 8 ];
23 byte[] hex_chars = new byte[20];
24
25 hex_chars[0] = '0';
26 hex_chars[1] = '1';
27 hex_chars[2] = '2';
28 hex_chars[3] = '3';
29 hex_chars[4] = '4';
30 hex_chars[5] = '5';
31 hex_chars[6] = '6';
32 hex_chars[7] = '7';
33 hex_chars[8] = '8';
34 hex_chars[9] = '9';
35 hex_chars[10] = 'A';
36 hex_chars[11] = 'B';
37 hex_chars[12] = 'C';
38 hex_chars[13] = 'D';
39 hex_chars[14] = 'E';
40 hex_chars[15] = 'F';
41
42 out.println( title + " - " + numBytes + " bytes." );
43 rows = numBytes >> 4;
44 residue = numBytes & 0x0000000F;
45 for ( i = 0 ; i < rows ; i++ )
46 {
47 int hexVal = (i * ROW_BYTES);
48 idx_buf[0] = hex_chars[((hexVal >> 12) & 15)];
49 idx_buf[1] = hex_chars[((hexVal >> 8) & 15)];
50 idx_buf[2] = hex_chars[((hexVal >> 4) & 15)];
51 idx_buf[3] = hex_chars[(hexVal & 15)];
52
53 String idxStr = new String ( idx_buf, 0, 4 );
54 out.print( idxStr + ": " );
55
56 for ( j = 0 ; j < ROW_BYTES ; j++ )
57 {
58 save_buf[j] = buf[(i * ROW_BYTES) + j];
59
60 hex_buf[0] = hex_chars[(save_buf[j] >> 4) & 0x0F];
61 hex_buf[1] = hex_chars[save_buf[j] & 0x0F];
62
63 out.print( (char)hex_buf[0] );
64 out.print( (char)hex_buf[1] );
65 out.print( ' ' );
66
67 if ( j == ROW_QTR1 || j == ROW_HALF || j == ROW_QTR2 )
68 out.print( " " );
69
70 if (save_buf[j] < 0x20 || save_buf[j] > 0xD9)
71 save_buf[j] = '.';
72 }
73
74 String saveStr = new String ( save_buf, 0, j );
75 out.println( " | " + saveStr + " |" );
76 }
77
78 if ( residue > 0 )
79 {
80 int hexVal = (i * ROW_BYTES);
81 idx_buf[0] = hex_chars[((hexVal >> 12) & 15)];
82 idx_buf[1] = hex_chars[((hexVal >> 8) & 15)];
83 idx_buf[2] = hex_chars[((hexVal >> 4) & 15)];
84 idx_buf[3] = hex_chars[(hexVal & 15)];
85
86 String idxStr = new String ( idx_buf, 0, 4 );
87 out.print( idxStr + ": " );
88
89 for ( j = 0 ; j < residue ; j++ )
90 {
91 save_buf[j] = buf[(i * ROW_BYTES) + j];
92
93 hex_buf[0] = hex_chars[(save_buf[j] >> 4) & 0x0F];
94 hex_buf[1] = hex_chars[save_buf[j] & 0x0F];
95
96 out.print( (char)hex_buf[0] );
97 out.print( (char)hex_buf[1] );
98 out.print( ' ' );
99
100 if ( j == ROW_QTR1 || j == ROW_HALF || j == ROW_QTR2 )
101 out.print( " " );
102
103 if (save_buf[j] < 0x20 || save_buf[j] > 0xD9)
104 save_buf[j] = '.';
105 }
106
107 for ( ; j < ROW_BYTES ; j++)
108 {
109 save_buf[j] = ' ';
110 out.print( " " );
111 if ( j == ROW_QTR1 || j == ROW_HALF || j == ROW_QTR2 )
112 out.print( " " );
113 }
114
115 String saveStr = new String ( save_buf, 0, j );
116 out.println( " | " + saveStr + " |" );
117 }
118 }
119
120 static public void
121 main( String [] args )
122 {
123 byte[] data = new byte[132];
124 for ( int i = 0 ; i < 132 ; ++i ) data[i] = (byte)i;
125
126 HexDump.dumpHexData( System.err, "Test HexDump", data, 132 );
127 }
128
129 }
130
131
132
133 |
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