1
2 /* ====================================================================
3 Licensed to the Apache Software Foundation (ASF) under one or more
4 contributor license agreements. See the NOTICE file distributed with
5 this work for additional information regarding copyright ownership.
6 The ASF licenses this file to You under the Apache License, Version 2.0
7 (the "License"); you may not use this file except in compliance with
8 the License. You may obtain a copy of the License at
9
10 http://www.apache.org/licenses/LICENSE-2.0
11
12 Unless required by applicable law or agreed to in writing, software
13 distributed under the License is distributed on an "AS IS" BASIS,
14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 See the License for the specific language governing permissions and
16 limitations under the License.
17 ==================================================================== */
18
19
20
21 package org.apache.poi.hdf.extractor;
22
23 /**
24 * Comment me
25 *
26 * @author Ryan Ackley
27 */
28
29 public class Utils
30 {
31
32 public static short convertBytesToShort(byte firstByte, byte secondByte)
33 {
34 return (short)convertBytesToInt((byte)0, (byte)0, firstByte, secondByte);
35 }
36 public static int convertBytesToInt(byte firstByte, byte secondByte,
37 byte thirdByte, byte fourthByte)
38 {
39 int firstInt = 0xff & firstByte;
40 int secondInt = 0xff & secondByte;
41 int thirdInt = 0xff & thirdByte;
42 int fourthInt = 0xff & fourthByte;
43
44 return (firstInt << 24) | (secondInt << 16) | (thirdInt << 8) | fourthInt;
45 }
46 public static short convertBytesToShort(byte[] array, int offset)
47 {
48 return convertBytesToShort(array[offset + 1], array[offset]);
49 }
50 public static int convertBytesToInt(byte[] array, int offset)
51 {
52 return convertBytesToInt(array[offset + 3], array[offset + 2], array[offset + 1], array[offset]);
53 }
54 public static int convertUnsignedByteToInt(byte b)
55 {
56 return (0xff & b);
57 }
58 public static char getUnicodeCharacter(byte[] array, int offset)
59 {
60 return (char)convertBytesToShort(array, offset);
61 }
62
63 }
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