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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
package org.openslx.libvirt.domain;
import java.math.BigInteger;
/**
* Collection of helper functions to maintain a Libvirt domain XML document.
*
* @author Manuel Bentele
* @version 1.0
*/
public final class DomainUtils
{
/**
* Converts memory value with specified SI unit to absolute value in bytes.
*
* @param value amount of memory in specified SI unit.
* @param unit SI unit name, one of: bytes, KB, k, KiB, MB, M, MiB, GB, G, GiB, TB, T, TiB, for
* <code>value</code>.
* @return absolute amount of memory in bytes.
*/
public static BigInteger decodeMemory( String value, String unit )
{
BigInteger factor = null;
BigInteger result = new BigInteger( value );
switch ( unit ) {
case "b":
case "bytes":
factor = new BigInteger( "1" );
break;
case "KB":
factor = new BigInteger( "1000" );
break;
case "k":
case "KiB":
factor = new BigInteger( "1024" );
break;
case "MB":
factor = new BigInteger( "1000000" );
break;
case "M":
case "MiB":
factor = new BigInteger( "1048576" );
break;
case "GB":
factor = new BigInteger( "1000000000" );
break;
case "G":
case "GiB":
factor = new BigInteger( "1073741824" );
break;
case "TB":
factor = new BigInteger( "1000000000000" );
break;
case "T":
case "TiB":
factor = new BigInteger( "1099511627776" );
break;
default:
return null;
}
return result.multiply( factor );
}
/**
* Convert memory from absolute value in bytes to value in specified SI unit.
*
* @param value absolute amount of memory in bytes.
* @param unit SI unit name, one of: bytes, KB, k, KiB, MB, M, MiB, GB, G, GiB, TB, T, TiB for
* returned memory value.
* @return amount of memory in specified SI unit.
*/
public static String encodeMemory( BigInteger value, String unit )
{
BigInteger dividend = null;
switch ( unit ) {
case "b":
case "bytes":
dividend = new BigInteger( "1" );
break;
case "KB":
dividend = new BigInteger( "1000" );
break;
case "k":
case "KiB":
dividend = new BigInteger( "1024" );
break;
case "MB":
dividend = new BigInteger( "1000000" );
break;
case "M":
case "MiB":
dividend = new BigInteger( "1048576" );
break;
case "GB":
dividend = new BigInteger( "1000000000" );
break;
case "G":
case "GiB":
dividend = new BigInteger( "1073741824" );
break;
case "TB":
dividend = new BigInteger( "1000000000000" );
break;
case "T":
case "TiB":
dividend = new BigInteger( "1099511627776" );
break;
default:
return null;
}
return value.divide( dividend ).toString();
}
}
|
