/
ByteBufferUtil.java
58 lines (49 loc) · 1.57 KB
/
ByteBufferUtil.java
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
/*
* Copyright 2017 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.flatbuffers;
import static com.google.flatbuffers.Constants.*;
import java.nio.ByteBuffer;
/// @file
/// @addtogroup flatbuffers_java_api
/// @{
/**
* Class that collects utility functions around `ByteBuffer`.
*/
public class ByteBufferUtil {
/**
* Extract the size prefix from a `ByteBuffer`.
*
* @param bb a size-prefixed buffer
* @return the size prefix
*/
public static int getSizePrefix(ByteBuffer bb) {
return bb.getInt(bb.position());
}
/**
* Create a duplicate of a size-prefixed `ByteBuffer` that has its position
* advanced just past the size prefix.
*
* @param bb a size-prefixed buffer
* @return a new buffer on the same underlying data that has skipped the
* size prefix
*/
public static ByteBuffer removeSizePrefix(ByteBuffer bb) {
ByteBuffer s = bb.duplicate();
s.position(s.position() + SIZE_PREFIX_LENGTH);
return s;
}
}
/// @}