1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.gallery3d.exif;
18 
19 import java.io.InputStream;
20 import java.nio.ByteBuffer;
21 
22 class ByteBufferInputStream extends InputStream {
23 
24     private ByteBuffer mBuf;
25 
ByteBufferInputStream(ByteBuffer buf)26     public ByteBufferInputStream(ByteBuffer buf) {
27         mBuf = buf;
28     }
29 
30     @Override
read()31     public int read() {
32         if (!mBuf.hasRemaining()) {
33             return -1;
34         }
35         return mBuf.get() & 0xFF;
36     }
37 
38     @Override
read(byte[] bytes, int off, int len)39     public int read(byte[] bytes, int off, int len) {
40         if (!mBuf.hasRemaining()) {
41             return -1;
42         }
43 
44         len = Math.min(len, mBuf.remaining());
45         mBuf.get(bytes, off, len);
46         return len;
47     }
48 }
49