mirror of
https://github.com/Ryujinx/GtkSharp.git
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245 lines
7.1 KiB
C#
245 lines
7.1 KiB
C#
/*
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* GioStream.cs: provide a System.IO.Stream api to [Input|Output]Streams
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*
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* Author(s):
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* Stephane Delcroix (stephane@delcroix.org)
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*
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* Copyright (c) 2008 Novell, Inc.
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*
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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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*/
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using System;
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namespace GLib
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{
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public class GioStream : System.IO.Stream
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{
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object stream;
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bool can_read;
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bool can_seek;
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bool can_write;
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bool is_disposed;
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public GioStream (Uri uri, System.IO.FileMode mode)
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{
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throw new NotImplementedException ();
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}
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public GioStream (string filename, System.IO.FileMode mode)
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{
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throw new NotImplementedException ();
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}
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public GioStream (InputStream stream)
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{
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this.stream = stream;
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can_read = true;
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can_seek = stream is ISeekable && (stream as ISeekable).CanSeek;
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}
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public GioStream (OutputStream stream)
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{
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this.stream = stream;
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can_write = true;
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can_seek = stream is ISeekable && (stream as ISeekable).CanSeek;
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}
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public GioStream (IOStream stream)
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{
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this.stream = stream;
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can_read = true;
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can_write = true;
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can_seek = stream is ISeekable && (stream as ISeekable).CanSeek;
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}
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public override bool CanSeek {
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get { return can_seek; }
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}
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public override bool CanRead {
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get { return can_read; }
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}
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public override bool CanWrite {
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get { return can_write; }
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}
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public override long Length {
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get {
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if (!CanSeek)
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throw new NotSupportedException ("This stream doesn't support seeking");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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if (stream is FileInputStream) {
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FileInfo info = (stream as FileInputStream).QueryInfo ("standard::size", null);
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return info.Size;
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}
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if (stream is FileOutputStream) {
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FileInfo info = (stream as FileOutputStream).QueryInfo ("standard::size", null);
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return info.Size;
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}
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if (stream is FileIOStream) {
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FileInfo info = (stream as FileIOStream).QueryInfo ("standard::size", null);
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return info.Size;
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}
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throw new NotImplementedException (String.Format ("not implemented for {0} streams", stream.GetType()));
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}
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}
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public override long Position {
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get {
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if (!CanSeek)
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throw new NotSupportedException ("This stream doesn't support seeking");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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return (stream as ISeekable).Position;
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}
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set {
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Seek (value, System.IO.SeekOrigin.Begin);
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}
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}
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public override void Flush ()
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{
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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}
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public override int Read (byte[] buffer, int offset, int count)
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{
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if (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (offset + count - 1 > buffer.Length)
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throw new ArgumentException ("(offset + count - 1) is greater than the length of buffer");
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if (offset < 0)
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throw new ArgumentOutOfRangeException ("offset");
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if (count < 0)
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throw new ArgumentOutOfRangeException ("count");
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if (!CanRead)
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throw new NotSupportedException ("The stream does not support reading");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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InputStream input_stream = null;
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if (stream is InputStream)
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input_stream = stream as InputStream;
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else if (stream is IOStream)
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input_stream = (stream as IOStream).InputStream;
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if (input_stream == null)
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throw new System.Exception ("this shouldn't happen");
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if (offset == 0)
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return (int)input_stream.Read (buffer, (ulong)count, null);
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else {
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byte[] buf = new byte[count];
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int ret = (int)input_stream.Read (buf, (ulong)count, null);
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buf.CopyTo (buffer, offset);
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return ret;
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}
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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 (buffer == null)
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throw new ArgumentNullException ("buffer");
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if (offset + count > buffer.Length)
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throw new ArgumentException ("(offset + count) is greater than the length of buffer");
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if (offset < 0)
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throw new ArgumentOutOfRangeException ("offset");
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if (count < 0)
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throw new ArgumentOutOfRangeException ("count");
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if (!CanWrite)
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throw new NotSupportedException ("The stream does not support writing");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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OutputStream output_stream = null;
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if (stream is OutputStream)
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output_stream = stream as OutputStream;
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else if (stream is IOStream)
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output_stream = (stream as IOStream).OutputStream;
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if (output_stream == null)
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throw new System.Exception ("this shouldn't happen");
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if (offset == 0) {
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output_stream.Write (buffer, (ulong)count, null);
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return;
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} else {
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byte[] buf = new byte[count];
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Array.Copy (buffer, offset, buf, 0, count);
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output_stream.Write (buf, (ulong)count, null);
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return;
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}
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}
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public override long Seek (long offset, System.IO.SeekOrigin origin)
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{
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if (!CanSeek)
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throw new NotSupportedException ("This stream doesn't support seeking");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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var seekable = stream as ISeekable;
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SeekType seek_type;
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switch (origin) {
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case System.IO.SeekOrigin.Current:
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seek_type = SeekType.Cur;
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break;
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case System.IO.SeekOrigin.End:
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seek_type = SeekType.End;
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break;
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case System.IO.SeekOrigin.Begin:
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default:
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seek_type = SeekType.Set;
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break;
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}
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seekable.Seek (offset, seek_type, null);
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return Position;
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}
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public override void SetLength (long value)
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{
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if (!CanSeek || !CanWrite)
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throw new NotSupportedException ("This stream doesn't support seeking");
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var seekable = stream as ISeekable;
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if (!seekable.CanTruncate ())
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throw new NotSupportedException ("This stream doesn't support truncating");
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if (is_disposed)
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throw new ObjectDisposedException ("The stream is closed");
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seekable.Truncate (value, null);
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}
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public override void Close ()
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{
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if (stream is InputStream)
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(stream as InputStream).Close (null);
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if (stream is OutputStream)
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(stream as OutputStream).Close (null);
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if (stream is IOStream)
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(stream as IOStream).Close (null);
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is_disposed = true;
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}
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}
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}
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