1 /*******************************************************************************
2 * Copyright (c) 2007- VTT Technical Research Centre of Finland.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
9 * VTT Technical Research Centre of Finland - initial API and implementation
10 *******************************************************************************/
12 * Created on Jan 21, 2005
14 * Copyright Toni Kalajainen
16 * Licensed under the Apache License, Version 2.0 (the "License");
17 * you may not use this file except in compliance with the License.
18 * You may obtain a copy of the License at
20 * http://www.apache.org/licenses/LICENSE-2.0
22 * Unless required by applicable law or agreed to in writing, software
23 * distributed under the License is distributed on an "AS IS" BASIS,
24 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25 * See the License for the specific language governing permissions and
26 * limitations under the License.
28 package org.simantics.utils.bytes;
31 * Little Endian long <-> byte array conversions
34 * @author Toni Kalajainen
39 * Convert long to byte array
40 * @param value long value
43 public static byte[] toBytes(long value)
45 byte array[] = new byte[8];
46 array[7] = (byte) (value & 0xff);
47 array[6] = (byte) ((value >> 8) & 0xff);
48 array[5] = (byte) ((value >> 16) & 0xff);
49 array[4] = (byte) ((value >> 24) & 0xff);
50 array[3] = (byte) ((value >> 32) & 0xff);
51 array[2] = (byte) ((value >> 40) & 0xff);
52 array[1] = (byte) ((value >> 48) & 0xff);
53 array[0] = (byte) ((value >> 56) & 0xff);
58 * Write long value to byte array
59 * @param value the long value
60 * @param array the byte array
61 * @param offset the offset
63 public static void write(long value, byte array[], int offset)
65 if (offset+8>array.length)
66 throw new IndexOutOfBoundsException();
67 array[7 + offset] = (byte) (value & 0xff);
68 array[6 + offset] = (byte) (value >> 8);
69 array[5 + offset] = (byte) (value >> 16);
70 array[4 + offset] = (byte) (value >> 24);
71 array[3 + offset] = (byte) (value >> 32);
72 array[2 + offset] = (byte) (value >> 40);
73 array[1 + offset] = (byte) (value >> 48);
74 array[0 + offset] = (byte) (value >> 56);
78 * Write long value to byte array
79 * @param value the long value
80 * @param array the byte array
82 public static void write(long value, byte array[])
85 throw new IndexOutOfBoundsException();
86 array[7] = (byte) (value & 0xff);
87 array[6] = (byte) (value >> 8);
88 array[5] = (byte) (value >> 16);
89 array[4] = (byte) (value >> 24);
90 array[3] = (byte) (value >> 32);
91 array[2] = (byte) (value >> 40);
92 array[1] = (byte) (value >> 48);
93 array[0] = (byte) (value >> 56);
97 * read long value from byte array
98 * @param array the array
99 * @param offset offset
102 public static long toLong(byte array[], int offset)
104 if (offset+8>array.length)
105 throw new IndexOutOfBoundsException();
107 ( ((long) array[7 + offset] & 0xFF) ) |
108 ( ((long) array[6 + offset] & 0xFF) << 8) |
109 ( ((long) array[5 + offset] & 0xFF) << 16) |
110 ( ((long) array[4 + offset] & 0xFF) << 24) |
111 ( ((long) array[3 + offset] & 0xFF) << 32) |
112 ( ((long) array[2 + offset] & 0xFF) << 40) |
113 ( ((long) array[1 + offset] & 0xFF) << 48) |
114 ( ((long) array[0 + offset] & 0xFF) << 56);
119 * read long value from byte array
120 * @param array the array
123 public static long toLong(byte array[])
126 throw new IndexOutOfBoundsException();
128 ( ((long) array[7] & 0xFF) ) |
129 ( ((long) array[6] & 0xFF) << 8) |
130 ( ((long) array[5] & 0xFF) << 16) |
131 ( ((long) array[4] & 0xFF) << 24) |
132 ( ((long) array[3] & 0xFF) << 32) |
133 ( ((long) array[2] & 0xFF) << 40) |
134 ( ((long) array[1] & 0xFF) << 48) |
135 ( ((long) array[0] & 0xFF) << 56);