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/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/util/ByteArrayBuffer.java $
* $Revision: 496070 $
* $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* For the license checker
* Licensed under the Apache License, Version 2.0
*
*/
package com.android.tv.tuner.util;
/** An expandable byte buffer built on byte array. */
public final class ByteArrayBuffer {
private byte[] buffer;
private int len;
public ByteArrayBuffer(int capacity) {
super();
if (capacity < 0) {
throw new IllegalArgumentException("Buffer capacity may not be negative");
}
this.buffer = new byte[capacity];
}
private void expand(int newlen) {
byte newbuffer[] = new byte[Math.max(this.buffer.length << 1, newlen)];
System.arraycopy(this.buffer, 0, newbuffer, 0, this.len);
this.buffer = newbuffer;
}
public void append(final byte[] b, int off, int len) {
if (b == null) {
return;
}
if ((off < 0)
|| (off > b.length)
|| (len < 0)
|| ((off + len) < 0)
|| ((off + len) > b.length)) {
throw new IndexOutOfBoundsException();
}
if (len == 0) {
return;
}
int newlen = this.len + len;
if (newlen > this.buffer.length) {
expand(newlen);
}
System.arraycopy(b, off, this.buffer, this.len, len);
this.len = newlen;
}
public void append(int b) {
int newlen = this.len + 1;
if (newlen > this.buffer.length) {
expand(newlen);
}
this.buffer[this.len] = (byte) b;
this.len = newlen;
}
public void append(final char[] b, int off, int len) {
if (b == null) {
return;
}
if ((off < 0)
|| (off > b.length)
|| (len < 0)
|| ((off + len) < 0)
|| ((off + len) > b.length)) {
throw new IndexOutOfBoundsException();
}
if (len == 0) {
return;
}
int oldlen = this.len;
int newlen = oldlen + len;
if (newlen > this.buffer.length) {
expand(newlen);
}
for (int i1 = off, i2 = oldlen; i2 < newlen; i1++, i2++) {
this.buffer[i2] = (byte) b[i1];
}
this.len = newlen;
}
public void clear() {
this.len = 0;
}
public byte[] toByteArray() {
byte[] b = new byte[this.len];
if (this.len > 0) {
System.arraycopy(this.buffer, 0, b, 0, this.len);
}
return b;
}
public int byteAt(int i) {
return this.buffer[i];
}
public int capacity() {
return this.buffer.length;
}
public int length() {
return this.len;
}
public byte[] buffer() {
return this.buffer;
}
public void setLength(int len) {
if (len < 0 || len > this.buffer.length) {
throw new IndexOutOfBoundsException();
}
this.len = len;
}
public boolean isEmpty() {
return this.len == 0;
}
public boolean isFull() {
return this.len == this.buffer.length;
}
}
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