blob: 52facb431d550a659dd0d9cea9733a642b006677 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright (c) 2011-2012 Isode Limited, London, England.
* All rights reserved.
*/
/*
* Copyright (c) 2010 Remko Tronçon.
* All rights reserved.
*/
package com.isode.stroke.stringcodecs;
import com.isode.stroke.base.ByteArray;
public class Hexify {
public static String hexify(byte datum) {
return String.format("%02x", new Byte(datum));
}
public static String hexify(ByteArray data) {
StringBuilder result = new StringBuilder();
for (byte b : data.getData()) {
result.append(hexify(b));
}
return result.toString();
}
public static ByteArray unhexify(String hexstring) {
if (hexstring.length() % 2 != 0) {
return new ByteArray();
}
byte[] result = new byte[hexstring.length() / 2];
for (int pos = 0; pos < hexstring.length() - 1; pos += 2) {
char c;
c = hexstring.charAt(pos);
int a = (c>='0'&&c<='9') ? c-'0' : (c>='A'&&c<='Z') ? c-'A' + 10 : (c>='a'&&c<='z') ? c-'a' + 10 : -1;
c = hexstring.charAt(pos+1);
int b = (c>='0'&&c<='9') ? c-'0' : (c>='A'&&c<='Z') ? c-'A' + 10 : (c>='a'&&c<='z') ? c-'a' + 10 : -1;
if (a == -1 || b == -1) return new ByteArray(); // fail
result[pos/2] = (byte) ((a << 4) | b);
}
return new ByteArray(result);
}
}
|
Swift