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
17package com.android.gallery3d.exif;
18
19import java.io.InputStream;
20import java.nio.ByteBuffer;
21
22class ByteBufferInputStream extends InputStream {
23
24    private ByteBuffer mBuf;
25
26    public ByteBufferInputStream(ByteBuffer buf) {
27        mBuf = buf;
28    }
29
30    @Override
31    public int read() {
32        if (!mBuf.hasRemaining()) {
33            return -1;
34        }
35        return mBuf.get() & 0xFF;
36    }
37
38    @Override
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