| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * 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 android.bluetooth; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * BluetoothInputStream. |
| * |
| * Used to write to a Bluetooth socket. |
| * |
| * @hide |
| */ |
| /*package*/ final class BluetoothInputStream extends InputStream { |
| private BluetoothSocket mSocket; |
| |
| /*package*/ BluetoothInputStream(BluetoothSocket s) { |
| mSocket = s; |
| } |
| |
| /** |
| * Return number of bytes available before this stream will block. |
| */ |
| public int available() throws IOException { |
| return mSocket.available(); |
| } |
| |
| public void close() throws IOException { |
| mSocket.close(); |
| } |
| |
| /** |
| * Reads a single byte from this stream and returns it as an integer in the |
| * range from 0 to 255. Returns -1 if the end of the stream has been |
| * reached. Blocks until one byte has been read, the end of the source |
| * stream is detected or an exception is thrown. |
| * |
| * @return the byte read or -1 if the end of stream has been reached. |
| * @throws IOException |
| * if the stream is closed or another IOException occurs. |
| * @since Android 1.5 |
| */ |
| public int read() throws IOException { |
| byte b[] = new byte[1]; |
| int ret = mSocket.read(b, 0, 1); |
| if (ret == 1) { |
| return (int)b[0] & 0xff; |
| } else { |
| return -1; |
| } |
| } |
| |
| /** |
| * Reads at most {@code length} bytes from this stream and stores them in |
| * the byte array {@code b} starting at {@code offset}. |
| * |
| * @param b |
| * the byte array in which to store the bytes read. |
| * @param offset |
| * the initial position in {@code buffer} to store the bytes |
| * read from this stream. |
| * @param length |
| * the maximum number of bytes to store in {@code b}. |
| * @return the number of bytes actually read or -1 if the end of the stream |
| * has been reached. |
| * @throws IndexOutOfBoundsException |
| * if {@code offset < 0} or {@code length < 0}, or if |
| * {@code offset + length} is greater than the length of |
| * {@code b}. |
| * @throws IOException |
| * if the stream is closed or another IOException occurs. |
| * @since Android 1.5 |
| */ |
| public int read(byte[] b, int offset, int length) throws IOException { |
| if (b == null) { |
| throw new NullPointerException("byte array is null"); |
| } |
| if ((offset | length) < 0 || length > b.length - offset) { |
| throw new ArrayIndexOutOfBoundsException("invalid offset or length"); |
| } |
| return mSocket.read(b, offset, length); |
| } |
| } |