1 #region Copyright notice and license 2 // Protocol Buffers - Google's data interchange format 3 // Copyright 2015 Google Inc. All rights reserved. 4 // https://developers.google.com/protocol-buffers/ 5 // 6 // Redistribution and use in source and binary forms, with or without 7 // modification, are permitted provided that the following conditions are 8 // met: 9 // 10 // * Redistributions of source code must retain the above copyright 11 // notice, this list of conditions and the following disclaimer. 12 // * Redistributions in binary form must reproduce the above 13 // copyright notice, this list of conditions and the following disclaimer 14 // in the documentation and/or other materials provided with the 15 // distribution. 16 // * Neither the name of Google Inc. nor the names of its 17 // contributors may be used to endorse or promote products derived from 18 // this software without specific prior written permission. 19 // 20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 #endregion 32 33 #if NET35 34 using System; 35 using System.IO; 36 37 namespace Google.Protobuf.Compatibility 38 { 39 /// <summary> 40 /// Extension methods for <see cref="Stream"/> in order to provide 41 /// backwards compatibility with .NET 3.5 42 /// </summary> 43 public static class StreamExtensions 44 { 45 // 81920 seems to be the default buffer size used in .NET 4.5.1 46 private const int BUFFER_SIZE = 81920; 47 48 /// <summary> 49 /// Write the contents of the current stream to the destination stream 50 /// </summary> CopyTo(this Stream source, Stream destination)51 public static void CopyTo(this Stream source, Stream destination) 52 { 53 if (destination == null) 54 { 55 throw new ArgumentNullException(nameof(destination)); 56 } 57 58 byte[] buffer = new byte[BUFFER_SIZE]; 59 int numBytesRead; 60 while ((numBytesRead = source.Read(buffer, 0, buffer.Length)) > 0) { 61 destination.Write(buffer, 0, numBytesRead); 62 } 63 } 64 } 65 } 66 #endif 67