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//
// System.IO.StringWriter
//
// Authors
// Marcin Szczepanski (marcins@zipworld.com.au)
// Sebastien Pouliot <sebastien@ximian.com>
// Marek Safar (marek.safar@gmail.com)
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
// Copyright 2011 Xamarin Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Globalization;
using System.Text;
using System.Runtime.InteropServices;
#if NET_4_5
using System.Threading.Tasks;
#endif
namespace System.IO
{
[Serializable]
[ComVisible (true)]
[MonoLimitation ("Serialization format not compatible with .NET")]
public class StringWriter : TextWriter
{
private StringBuilder internalString;
private bool disposed;
public StringWriter ()
: this (new StringBuilder ())
{
}
public StringWriter (IFormatProvider formatProvider)
: this (new StringBuilder (), formatProvider)
{
}
public StringWriter (StringBuilder sb)
: this (sb, null)
{
}
public StringWriter (StringBuilder sb, IFormatProvider formatProvider)
{
if (sb == null)
throw new ArgumentNullException ("sb");
internalString = sb;
internalFormatProvider = formatProvider;
}
public override Encoding Encoding {
get {
return Encoding.Unicode;
}
}
public override void Close ()
{
Dispose (true);
disposed = true;
}
protected override void Dispose (bool disposing)
{
// MS.NET doesn't clear internal buffer.
// internalString = null;
base.Dispose (disposing);
disposed = true;
}
public virtual StringBuilder GetStringBuilder ()
{
return internalString;
}
public override string ToString ()
{
return internalString.ToString ();
}
public override void Write (char value)
{
if (disposed) {
throw new ObjectDisposedException ("StringReader",
Locale.GetText ("Cannot write to a closed StringWriter"));
}
internalString.Append (value);
}
public override void Write (string value)
{
if (disposed) {
throw new ObjectDisposedException ("StringReader",
Locale.GetText ("Cannot write to a closed StringWriter"));
}
internalString.Append (value);
}
public override void Write (char[] buffer, int index, int count)
{
if (disposed) {
throw new ObjectDisposedException ("StringReader",
Locale.GetText ("Cannot write to a closed StringWriter"));
}
if (buffer == null)
throw new ArgumentNullException ("buffer");
if (index < 0)
throw new ArgumentOutOfRangeException ("index", "< 0");
if (count < 0)
throw new ArgumentOutOfRangeException ("count", "< 0");
// re-ordered to avoid possible integer overflow
if (index > buffer.Length - count)
throw new ArgumentException ("index + count > buffer.Length");
internalString.Append (buffer, index, count);
}
#if NET_4_5
public override Task FlushAsync ()
{
// it appears to do nothing
return TaskConstants.Finished;
}
//
// All async methods return finished task with a result as it's faster
// than setting up async call
//
public override Task WriteAsync (char value)
{
Write (value);
return TaskConstants.Finished;
}
public override Task WriteAsync (char[] buffer, int index, int count)
{
Write (buffer, index, count);
return TaskConstants.Finished;
}
public override Task WriteAsync (string value)
{
Write (value);
return TaskConstants.Finished;
}
public override Task WriteLineAsync (char value)
{
WriteLine (value);
return TaskConstants.Finished;
}
public override Task WriteLineAsync (char[] buffer, int index, int count)
{
WriteLine (buffer, index, count);
return TaskConstants.Finished;
}
public override Task WriteLineAsync (string value)
{
WriteLine (value);
return TaskConstants.Finished;
}
#endif
}
}
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