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| @@ -0,0 +1,64 @@ | ||
| #region Copyright notice and license | ||
| // Protocol Buffers - Google's data interchange format | ||
| // Copyright 2008 Google Inc. All rights reserved. | ||
| // https://developers.google.com/protocol-buffers/ | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are | ||
| // met: | ||
| // | ||
| // * Redistributions of source code must retain the above copyright | ||
| // notice, this list of conditions and the following disclaimer. | ||
| // * Redistributions in binary form must reproduce the above | ||
| // copyright notice, this list of conditions and the following disclaimer | ||
| // in the documentation and/or other materials provided with the | ||
| // distribution. | ||
| // * Neither the name of Google Inc. nor the names of its | ||
| // contributors may be used to endorse or promote products derived from | ||
| // this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| #endregion | ||
|
|
||
| using System; | ||
| using System.IO; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace Google.Protobuf | ||
| { | ||
| /// <summary> | ||
| /// SecuritySafeCritical attribute can not be placed on types with async methods. | ||
| /// This class has ByteString's async methods so it can be marked with SecuritySafeCritical. | ||
| /// </summary> | ||
| internal static class ByteStringAsync | ||
| { | ||
| #if !NET35 | ||
| internal static async Task<ByteString> FromStreamAsyncCore(Stream stream, CancellationToken cancellationToken) | ||
| { | ||
| int capacity = stream.CanSeek ? checked((int)(stream.Length - stream.Position)) : 0; | ||
| var memoryStream = new MemoryStream(capacity); | ||
| // We have to specify the buffer size here, as there's no overload accepting the cancellation token | ||
| // alone. But it's documented to use 81920 by default if not specified. | ||
| await stream.CopyToAsync(memoryStream, 81920, cancellationToken); | ||
| #if NETSTANDARD1_1 || NETSTANDARD2_0 | ||
| byte[] bytes = memoryStream.ToArray(); | ||
| #else | ||
| // Avoid an extra copy if we can. | ||
| byte[] bytes = memoryStream.Length == memoryStream.Capacity ? memoryStream.GetBuffer() : memoryStream.ToArray(); | ||
| #endif | ||
| return ByteString.AttachBytes(bytes); | ||
| } | ||
| #endif | ||
| } | ||
| } |