76 lines
1.9 KiB
C#
76 lines
1.9 KiB
C#
using System;
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using System.IO;
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namespace MatFileHandler;
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/// <summary>
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/// A stream which wraps another stream and tracks the number of bytes read
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/// for the purpose of adjusting for padding.
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/// </summary>
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internal sealed class PositionTrackingStream : Stream
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{
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private readonly Stream _baseStream;
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private long _position;
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/// <summary>
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/// Initializes a new instance of the <see cref="PositionTrackingStream"/> class.
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/// </summary>
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/// <param name="baseStream">The stream to wrap.</param>
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public PositionTrackingStream(Stream baseStream)
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{
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_baseStream = baseStream;
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}
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/// <inheritdoc/>
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public override bool CanRead => _baseStream.CanRead;
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/// <inheritdoc/>
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public override bool CanSeek => false;
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/// <inheritdoc/>
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public override bool CanWrite => false;
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/// <inheritdoc/>
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public override long Length => _baseStream.Length;
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/// <inheritdoc/>
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public override long Position
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{
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get => _position;
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set => throw new NotSupportedException();
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}
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/// <inheritdoc/>
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public override void Flush() => _baseStream.Flush();
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/// <inheritdoc/>
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public override int Read(byte[] buffer, int offset, int count)
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{
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var bytesRead = _baseStream.Read(buffer, offset, count);
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_position += bytesRead;
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return bytesRead;
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}
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/// <inheritdoc/>
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public override long Seek(long offset, SeekOrigin origin) => throw new NotSupportedException();
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/// <inheritdoc/>
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public override void SetLength(long value) => throw new NotSupportedException();
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/// <inheritdoc/>
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public override void Write(byte[] buffer, int offset, int count) => throw new NotSupportedException();
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/// <inheritdoc/>
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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_baseStream.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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