| /* |
| * 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; |
| using System.IO; |
| |
| namespace Apache.NMS.ActiveMQ.OpenWire |
| |
| { |
| /// <summary> |
| /// Represents a stream of boolean flags |
| /// </summary> |
| public class BooleanStream |
| { |
| byte[] data = new byte[48]; |
| short arrayLimit; |
| short arrayPos; |
| byte bytePos; |
| |
| public bool ReadBoolean() |
| { |
| byte b = data[arrayPos]; |
| bool rc = ((b >> bytePos) & 0x01) != 0; |
| bytePos++; |
| if (bytePos >= 8) |
| { |
| bytePos = 0; |
| arrayPos++; |
| } |
| return rc; |
| } |
| |
| public void WriteBoolean(bool value) |
| { |
| if (bytePos == 0) |
| { |
| arrayLimit++; |
| if (arrayLimit >= data.Length) |
| { |
| // re-grow the array. |
| byte[] d = new byte[data.Length * 2]; |
| Array.Copy(data, d, data.Length); |
| data = d; |
| } |
| } |
| if (value) |
| { |
| data[arrayPos] |= (byte) (0x01 << bytePos); |
| } |
| bytePos++; |
| if (bytePos >= 8) |
| { |
| bytePos = 0; |
| arrayPos++; |
| } |
| } |
| |
| public void Marshal(BinaryWriter dataOut) |
| { |
| if( arrayLimit < 64 ) { |
| dataOut.Write((byte)arrayLimit); |
| } else if( arrayLimit < 256 ) { // max value of unsigned byte |
| dataOut.Write((byte)0xC0); |
| dataOut.Write((byte)arrayLimit); |
| } else { |
| dataOut.Write((byte)0x80); |
| dataOut.Write(arrayLimit); |
| } |
| dataOut.Write(data, 0, arrayLimit); |
| Clear(); |
| } |
| |
| public void Unmarshal(BinaryReader dataIn) |
| { |
| arrayLimit = (short)(dataIn.ReadByte() & 0xFF); |
| if ( arrayLimit == 0xC0 ) { |
| arrayLimit = (short)(dataIn.ReadByte() & 0xFF); |
| } else if( arrayLimit == 0x80 ) { |
| arrayLimit = dataIn.ReadInt16(); |
| } |
| if( data.Length < arrayLimit ) { |
| data = new byte[arrayLimit]; |
| } |
| |
| dataIn.Read(data, 0, arrayLimit); |
| Clear(); |
| } |
| |
| public void Clear() |
| { |
| arrayPos = 0; |
| bytePos = 0; |
| } |
| |
| public int MarshalledSize() |
| { |
| if( arrayLimit < 64 ) { |
| return 1+arrayLimit; |
| } else if (arrayLimit < 256) { |
| return 2+arrayLimit; |
| } else { |
| return 3+arrayLimit; |
| } |
| |
| } |
| } |
| } |