57 lines
2.1 KiB
C#
57 lines
2.1 KiB
C#
using System;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace S7.Net
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{
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/// <summary>
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/// Extensions for Streams
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/// </summary>
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public static class StreamExtensions
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{
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/// <summary>
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/// Reads bytes from the stream into the buffer until exactly the requested number of bytes (or EOF) have been read
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/// </summary>
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/// <param name="stream">the Stream to read from</param>
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/// <param name="buffer">the buffer to read into</param>
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/// <param name="offset">the offset in the buffer to read into</param>
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/// <param name="count">the amount of bytes to read into the buffer</param>
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/// <returns>returns the amount of read bytes</returns>
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public static int ReadExact(this Stream stream, byte[] buffer, int offset, int count)
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{
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int read = 0;
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int received;
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do
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{
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received = stream.Read(buffer, offset + read, count - read);
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read += received;
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}
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while (read < count && received > 0);
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return read;
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}
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/// <summary>
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/// Reads bytes from the stream into the buffer until exactly the requested number of bytes (or EOF) have been read
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/// </summary>
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/// <param name="stream">the Stream to read from</param>
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/// <param name="buffer">the buffer to read into</param>
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/// <param name="offset">the offset in the buffer to read into</param>
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/// <param name="count">the amount of bytes to read into the buffer</param>
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/// <returns>returns the amount of read bytes</returns>
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public static async Task<int> ReadExactAsync(this Stream stream, byte[] buffer, int offset, int count, CancellationToken cancellationToken)
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{
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int read = 0;
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int received;
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do
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{
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received = await stream.ReadAsync(buffer, offset + read, count - read, cancellationToken).ConfigureAwait(false);
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read += received;
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}
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while (read < count && received > 0);
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return read;
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}
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}
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} |