mirror of
https://github.com/ShareX/ShareX.git
synced 2024-08-15 10:12:12 +12:00
78 lines
No EOL
2.6 KiB
C#
78 lines
No EOL
2.6 KiB
C#
#region License Information (GPL v3)
|
|
|
|
/*
|
|
ShareX - A program that allows you to take screenshots and share any file type
|
|
Copyright (c) 2007-2020 ShareX Team
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#endregion License Information (GPL v3)
|
|
|
|
using System;
|
|
using System.IO;
|
|
|
|
namespace ShareX.HelpersLib
|
|
{
|
|
internal sealed class MaxLengthStream : Stream
|
|
{
|
|
private readonly Stream stream;
|
|
private long length = 0L;
|
|
|
|
public MaxLengthStream(Stream stream, long maxLength)
|
|
{
|
|
this.stream = stream ?? throw new ArgumentNullException(nameof(stream));
|
|
MaxLength = maxLength;
|
|
}
|
|
|
|
public long MaxLength { get; }
|
|
|
|
public override bool CanRead => stream.CanRead;
|
|
public override bool CanSeek => false;
|
|
public override bool CanWrite => false;
|
|
public override long Length => stream.Length;
|
|
|
|
public override long Position
|
|
{
|
|
get => stream.Position;
|
|
set => throw new NotSupportedException();
|
|
}
|
|
|
|
public override int Read(byte[] buffer, int offset, int count)
|
|
{
|
|
int result = stream.Read(buffer, offset, count);
|
|
length += result;
|
|
if (length > MaxLength)
|
|
{
|
|
throw new Exception("Stream is larger than the maximum allowed size.");
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
public override void Flush() => throw new NotSupportedException();
|
|
public override long Seek(long offset, SeekOrigin origin) => throw new NotSupportedException();
|
|
public override void SetLength(long value) => throw new NotSupportedException();
|
|
public override void Write(byte[] buffer, int offset, int count) => throw new NotSupportedException();
|
|
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
stream.Dispose();
|
|
base.Dispose(disposing);
|
|
}
|
|
}
|
|
} |