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103 lines
2.6 KiB
C#
103 lines
2.6 KiB
C#
//
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// System.Web.TempFileStream.cs
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// Copyright (C) 2006 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.IO;
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using System.Runtime.InteropServices;
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namespace System.Web {
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internal class TempFileStream : FileStream {
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bool read_mode;
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bool disposed;
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long saved_position;
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public TempFileStream (string name)
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: base (name, FileMode.Create, FileAccess.ReadWrite, FileShare.None, 8192)
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{
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}
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public override bool CanRead {
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get { return read_mode; }
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}
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public override bool CanWrite {
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get { return !read_mode; }
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}
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public void SavePosition ()
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{
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saved_position = Position;
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Position = 0;
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}
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public void RestorePosition ()
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{
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Position = saved_position;
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saved_position = -1;
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}
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public void SetReadOnly ()
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{
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read_mode = true;
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Position = 0;
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}
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public void SetWriteOnly ()
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{
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read_mode = false;
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Position = 0;
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}
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public override void Write (byte [] buffer, int offset, int count)
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{
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if (read_mode)
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throw new InvalidOperationException ("mode read");
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base.Write (buffer, offset, count);
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}
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public override int Read ([In,Out] byte [] buffer, int offset, int count)
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{
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if (!read_mode)
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throw new InvalidOperationException ("mode write");
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return base.Read (buffer, offset, count);
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}
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protected override void Dispose (bool disposing)
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{
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if (!disposed) {
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disposed = true;
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base.Dispose (disposing);
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try {
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File.Delete (Name);
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} catch {}
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}
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}
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}
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}
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