99 lines
3.2 KiB
Java
99 lines
3.2 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import java.io.IOException;
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import java.io.InputStream;
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/**
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* BluetoothInputStream.
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*
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* Used to write to a Bluetooth socket.
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*
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* @hide
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*/
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/*package*/ final class BluetoothInputStream extends InputStream {
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private BluetoothSocket mSocket;
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/*package*/ BluetoothInputStream(BluetoothSocket s) {
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mSocket = s;
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}
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/**
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* Return number of bytes available before this stream will block.
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*/
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public int available() throws IOException {
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return mSocket.available();
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}
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public void close() throws IOException {
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mSocket.close();
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}
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/**
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* Reads a single byte from this stream and returns it as an integer in the
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* range from 0 to 255. Returns -1 if the end of the stream has been
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* reached. Blocks until one byte has been read, the end of the source
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* stream is detected or an exception is thrown.
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*
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* @return the byte read or -1 if the end of stream has been reached.
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* @throws IOException
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* if the stream is closed or another IOException occurs.
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* @since Android 1.5
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*/
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public int read() throws IOException {
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byte b[] = new byte[1];
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int ret = mSocket.read(b, 0, 1);
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if (ret == 1) {
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return (int)b[0] & 0xff;
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} else {
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return -1;
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}
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}
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/**
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* Reads at most {@code length} bytes from this stream and stores them in
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* the byte array {@code b} starting at {@code offset}.
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*
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* @param b
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* the byte array in which to store the bytes read.
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* @param offset
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* the initial position in {@code buffer} to store the bytes
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* read from this stream.
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* @param length
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* the maximum number of bytes to store in {@code b}.
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* @return the number of bytes actually read or -1 if the end of the stream
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* has been reached.
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* @throws IndexOutOfBoundsException
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* if {@code offset < 0} or {@code length < 0}, or if
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* {@code offset + length} is greater than the length of
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* {@code b}.
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* @throws IOException
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* if the stream is closed or another IOException occurs.
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* @since Android 1.5
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*/
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public int read(byte[] b, int offset, int length) throws IOException {
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if (b == null) {
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throw new NullPointerException("byte array is null");
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}
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if ((offset | length) < 0 || length > b.length - offset) {
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throw new ArrayIndexOutOfBoundsException("invalid offset or length");
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}
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return mSocket.read(b, offset, length);
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}
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}
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