| // 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; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| namespace Apache.Arrow |
| { |
| internal static partial class StreamExtensions |
| { |
| public static async ValueTask<int> ReadFullBufferAsync(this Stream stream, Memory<byte> buffer, CancellationToken cancellationToken = default) |
| { |
| int totalBytesRead = 0; |
| do |
| { |
| int bytesRead = |
| await stream.ReadAsync( |
| buffer.Slice(totalBytesRead, buffer.Length - totalBytesRead), |
| cancellationToken) |
| .ConfigureAwait(false); |
| |
| if (bytesRead == 0) |
| { |
| // reached the end of the stream |
| return totalBytesRead; |
| } |
| |
| totalBytesRead += bytesRead; |
| } |
| while (totalBytesRead < buffer.Length); |
| |
| return totalBytesRead; |
| } |
| |
| public static int ReadFullBuffer(this Stream stream, Memory<byte> buffer) |
| { |
| int totalBytesRead = 0; |
| do |
| { |
| int bytesRead = stream.Read( |
| buffer.Slice(totalBytesRead, buffer.Length - totalBytesRead)); |
| |
| if (bytesRead == 0) |
| { |
| // reached the end of the stream |
| return totalBytesRead; |
| } |
| |
| totalBytesRead += bytesRead; |
| } |
| while (totalBytesRead < buffer.Length); |
| |
| return totalBytesRead; |
| } |
| } |
| } |