mcs/class/Mono.Profiler.Log/Mono.Profiler.Log/LogStream.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 using System;
   6 using System.IO;
   7
   8 namespace Mono.Profiler.Log {
   9
  10         public class LogStream : Stream {
  11
  12                 public Stream BaseStream { get; }
  13
  14                 public virtual bool EndOfStream => BaseStream.Position == BaseStream.Length;
  15
  16                 public override bool CanRead => true;
  17
  18                 public override bool CanSeek => false;
  19
  20                 public override bool CanWrite => false;
  21
  22                 public override long Length => throw new NotSupportedException ();
  23
  24                 public override long Position {
  25                         get => throw new NotSupportedException ();
  26                         set => throw new NotSupportedException ();
  27                 }
  28
  29                 public LogStream (Stream baseStream)
  30                 {
  31                         if (baseStream == null)
  32                                 throw new ArgumentNullException (nameof (baseStream));
  33
  34                         if (!baseStream.CanRead)
  35                                 throw new ArgumentException ("Stream does not support reading.", nameof (baseStream));
  36
  37                         BaseStream = baseStream;
  38                 }
  39
  40                 protected override void Dispose (bool disposing)
  41                 {
  42                         if (disposing)
  43                                 BaseStream.Dispose ();
  44                 }
  45
  46                 public override void Flush ()
  47                 {
  48                         throw new NotSupportedException ();
  49                 }
  50
  51                 public override int Read (byte[] buffer, int offset, int count)
  52                 {
  53                         return BaseStream.Read (buffer, offset, count);
  54                 }
  55
  56                 public override long Seek (long offset, SeekOrigin origin)
  57                 {
  58                         throw new NotSupportedException ();
  59                 }
  60
  61                 public override void SetLength (long value)
  62                 {
  63                         throw new NotSupportedException ();
  64                 }
  65
  66                 public override void Write (byte[] buffer, int offset, int count)
  67                 {
  68                         throw new NotSupportedException ();
  69                 }
  70         }
  71 }