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1 package com.openedit.archive.cumulus;
2
3 public class HexToBinaryConverter
4 {
5 public byte[] hexToBinary( String  inHex )
6 {
7 if ( inHex.length() % 2 != 0 )
8 {
9 throw new IllegalArgumentException ( "Hex string must have an even number of characters" );
10 }
11 byte[] bytes = new byte[inHex.length() / 2];
12 for ( int i = 0; i < inHex.length(); i += 2 )
13 {
14 bytes[i >> 1] = (byte) ( ( convertChar( inHex.charAt( i ) ) << 4 ) |
15 convertChar( inHex.charAt( i + 1 ) ) );
16 }
17 return bytes;
18 }
19
20 protected int convertChar( char inChar )
21 {
22 if ( inChar >= '0' && inChar <= '9' )
23 {
24 return inChar - '0';
25 }
26 else if ( inChar >= 'A' && inChar <= 'F' )
27 {
28 return inChar - 'A' + 10;
29 }
30 else
31 {
32 throw new IllegalArgumentException ( "Invalid hex character " + inChar );
33 }
34 }
35 }
36 |
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