| /* |
| * |
| * 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. |
| * |
| */ |
| using System; |
| |
| namespace Apache.Qpid.Buffer |
| { |
| internal sealed class SimpleByteBuffer : ByteBuffer |
| { |
| private byte[] _buffer; |
| |
| public override int Capacity |
| { |
| get { return _buffer.Length; } |
| } |
| |
| public override byte[] Array |
| { |
| get { return _buffer; } |
| } |
| |
| /// <summary> |
| /// Initialize a new instance with the desired size |
| /// </summary> |
| /// <param name="desiredSize">Initial Length of the array</param> |
| internal SimpleByteBuffer(int desiredSize) |
| { |
| _buffer = new byte[desiredSize]; |
| Position = 0; |
| Limit = Capacity; |
| } |
| |
| /// <summary> |
| /// Initialize a new instance with the data from |
| /// an underlying array |
| /// </summary> |
| /// <param name="buffer">Initial data</param> |
| /// <remarks>The original array is copied during construction and is not modified</remarks> |
| internal SimpleByteBuffer(byte[] buffer) |
| { |
| _buffer = (byte[])buffer.Clone(); |
| // position at end |
| Position = Limit = Capacity; |
| } |
| |
| protected override void DoWrite(int position, byte value) |
| { |
| // available space is already handled by base class |
| _buffer[position] = value; |
| } |
| |
| protected override void DoWrite(int position, byte[] src, int offset, int length) |
| { |
| // available space is already handled by base class |
| for ( int i = 0; i < length; i++ ) |
| { |
| _buffer[position+i] = src[offset+i]; |
| } |
| } |
| |
| protected override byte DoReadByte(int position) |
| { |
| return _buffer[position]; |
| } |
| |
| protected override void DoReadBytes(int position, byte[] dest, int offset, int length) |
| { |
| System.Array.Copy(_buffer, position, dest, offset, length); |
| } |
| |
| protected override void DoCompact() |
| { |
| if ( Remaining > 0 ) |
| { |
| if ( Position > 0 ) |
| { |
| System.Array.Copy(_buffer, Position, _buffer, 0, Remaining); |
| } |
| Position = Remaining; |
| } else |
| { |
| Position = 0; |
| } |
| Limit = Capacity; |
| } |
| |
| protected override void DoResize(int newSize) |
| { |
| if ( newSize < Capacity ) |
| throw new NotSupportedException("Cannot resize a buffer to make it smaller"); |
| |
| int newCapacity = 1; |
| while ( newCapacity < newSize ) |
| { |
| newCapacity <<= 1; |
| } |
| |
| byte[] newBuffer = new byte[newCapacity]; |
| System.Array.Copy(_buffer, newBuffer, _buffer.Length); |
| _buffer = newBuffer; |
| } |
| } // class SimpleByteBuffer |
| } |