Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / IO / TextReader.cs / 1 / TextReader.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: TextReader
**
**
** Purpose: Abstract base class for all Text-only Readers.
** Subclasses will include StreamReader & StringReader.
**
**
===========================================================*/
using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Security.Permissions;
namespace System.IO {
// This abstract base class represents a reader that can read a sequential
// stream of characters. This is not intended for reading bytes -
// there are methods on the Stream class to read bytes.
// A subclass must minimally implement the Peek() and Read() methods.
//
// This class is intended for character input, not bytes.
// There are methods on the Stream class for reading bytes.
[Serializable()]
[ComVisible(true)]
public abstract class TextReader : MarshalByRefObject, IDisposable
{
public static readonly TextReader Null = new NullTextReader();
protected TextReader() {}
// Closes this TextReader and releases any system resources associated with the
// TextReader. Following a call to Close, any operations on the TextReader
// may raise exceptions.
//
// This default method is empty, but descendant classes can override the
// method to provide the appropriate functionality.
public virtual void Close()
{
Dispose(true);
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
}
// Returns the next available character without actually reading it from
// the input stream. The current position of the TextReader is not changed by
// this operation. The returned value is -1 if no further characters are
// available.
//
// This default method simply returns -1.
//
public virtual int Peek()
{
return -1;
}
// Reads the next character from the input stream. The returned value is
// -1 if no further characters are available.
//
// This default method simply returns -1.
//
public virtual int Read()
{
return -1;
}
// Reads a block of characters. This method will read up to
// count characters from this TextReader into the
// buffer character array starting at position
// index. Returns the actual number of characters read.
//
public virtual int Read([In, Out] char[] buffer, int index, int count)
{
if (buffer==null)
throw new ArgumentNullException("buffer", Environment.GetResourceString("ArgumentNull_Buffer"));
if (index < 0)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (count < 0)
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (buffer.Length - index < count)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
int n = 0;
do {
int ch = Read();
if (ch == -1) break;
buffer[index + n++] = (char)ch;
} while (n < count);
return n;
}
// Reads all characters from the current position to the end of the
// TextReader, and returns them as one string.
public virtual String ReadToEnd()
{
char[] chars = new char[4096];
int len;
StringBuilder sb = new StringBuilder(4096);
while((len=Read(chars, 0, chars.Length)) != 0)
{
sb.Append(chars, 0, len);
}
return sb.ToString();
}
// Blocking version of read. Returns only when count
// characters have been read or the end of the file was reached.
//
public virtual int ReadBlock([In, Out] char[] buffer, int index, int count)
{
int i, n = 0;
do {
n += (i = Read(buffer, index + n, count - n));
} while (i > 0 && n < count);
return n;
}
// Reads a line. A line is defined as a sequence of characters followed by
// a carriage return ('\r'), a line feed ('\n'), or a carriage return
// immediately followed by a line feed. The resulting string does not
// contain the terminating carriage return and/or line feed. The returned
// value is null if the end of the input stream has been reached.
//
public virtual String ReadLine()
{
StringBuilder sb = new StringBuilder();
while (true) {
int ch = Read();
if (ch == -1) break;
if (ch == '\r' || ch == '\n')
{
if (ch == '\r' && Peek() == '\n') Read();
return sb.ToString();
}
sb.Append((char)ch);
}
if (sb.Length > 0) return sb.ToString();
return null;
}
[HostProtection(Synchronization=true)]
public static TextReader Synchronized(TextReader reader)
{
if (reader==null)
throw new ArgumentNullException("reader");
if (reader is SyncTextReader)
return reader;
return new SyncTextReader(reader);
}
[Serializable()]
private sealed class NullTextReader : TextReader
{
public override int Read(char[] buffer, int index, int count)
{
return 0;
}
public override String ReadLine()
{
return null;
}
}
[Serializable()]
internal sealed class SyncTextReader : TextReader
{
internal TextReader _in;
internal SyncTextReader(TextReader t)
{
_in = t;
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override void Close()
{
// So that any overriden Close() gets run
_in.Close();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
protected override void Dispose(bool disposing)
{
// Explicitly pick up a potentially methodimpl'ed Dispose
if (disposing)
((IDisposable)_in).Dispose();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Peek()
{
return _in.Peek();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Read()
{
return _in.Read();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Read([In, Out] char[] buffer, int index, int count)
{
return _in.Read(buffer, index, count);
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int ReadBlock([In, Out] char[] buffer, int index, int count)
{
return _in.ReadBlock(buffer, index, count);
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override String ReadLine()
{
return _in.ReadLine();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override String ReadToEnd()
{
return _in.ReadToEnd();
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: TextReader
**
**
** Purpose: Abstract base class for all Text-only Readers.
** Subclasses will include StreamReader & StringReader.
**
**
===========================================================*/
using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Security.Permissions;
namespace System.IO {
// This abstract base class represents a reader that can read a sequential
// stream of characters. This is not intended for reading bytes -
// there are methods on the Stream class to read bytes.
// A subclass must minimally implement the Peek() and Read() methods.
//
// This class is intended for character input, not bytes.
// There are methods on the Stream class for reading bytes.
[Serializable()]
[ComVisible(true)]
public abstract class TextReader : MarshalByRefObject, IDisposable
{
public static readonly TextReader Null = new NullTextReader();
protected TextReader() {}
// Closes this TextReader and releases any system resources associated with the
// TextReader. Following a call to Close, any operations on the TextReader
// may raise exceptions.
//
// This default method is empty, but descendant classes can override the
// method to provide the appropriate functionality.
public virtual void Close()
{
Dispose(true);
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
}
// Returns the next available character without actually reading it from
// the input stream. The current position of the TextReader is not changed by
// this operation. The returned value is -1 if no further characters are
// available.
//
// This default method simply returns -1.
//
public virtual int Peek()
{
return -1;
}
// Reads the next character from the input stream. The returned value is
// -1 if no further characters are available.
//
// This default method simply returns -1.
//
public virtual int Read()
{
return -1;
}
// Reads a block of characters. This method will read up to
// count characters from this TextReader into the
// buffer character array starting at position
// index. Returns the actual number of characters read.
//
public virtual int Read([In, Out] char[] buffer, int index, int count)
{
if (buffer==null)
throw new ArgumentNullException("buffer", Environment.GetResourceString("ArgumentNull_Buffer"));
if (index < 0)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (count < 0)
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (buffer.Length - index < count)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
int n = 0;
do {
int ch = Read();
if (ch == -1) break;
buffer[index + n++] = (char)ch;
} while (n < count);
return n;
}
// Reads all characters from the current position to the end of the
// TextReader, and returns them as one string.
public virtual String ReadToEnd()
{
char[] chars = new char[4096];
int len;
StringBuilder sb = new StringBuilder(4096);
while((len=Read(chars, 0, chars.Length)) != 0)
{
sb.Append(chars, 0, len);
}
return sb.ToString();
}
// Blocking version of read. Returns only when count
// characters have been read or the end of the file was reached.
//
public virtual int ReadBlock([In, Out] char[] buffer, int index, int count)
{
int i, n = 0;
do {
n += (i = Read(buffer, index + n, count - n));
} while (i > 0 && n < count);
return n;
}
// Reads a line. A line is defined as a sequence of characters followed by
// a carriage return ('\r'), a line feed ('\n'), or a carriage return
// immediately followed by a line feed. The resulting string does not
// contain the terminating carriage return and/or line feed. The returned
// value is null if the end of the input stream has been reached.
//
public virtual String ReadLine()
{
StringBuilder sb = new StringBuilder();
while (true) {
int ch = Read();
if (ch == -1) break;
if (ch == '\r' || ch == '\n')
{
if (ch == '\r' && Peek() == '\n') Read();
return sb.ToString();
}
sb.Append((char)ch);
}
if (sb.Length > 0) return sb.ToString();
return null;
}
[HostProtection(Synchronization=true)]
public static TextReader Synchronized(TextReader reader)
{
if (reader==null)
throw new ArgumentNullException("reader");
if (reader is SyncTextReader)
return reader;
return new SyncTextReader(reader);
}
[Serializable()]
private sealed class NullTextReader : TextReader
{
public override int Read(char[] buffer, int index, int count)
{
return 0;
}
public override String ReadLine()
{
return null;
}
}
[Serializable()]
internal sealed class SyncTextReader : TextReader
{
internal TextReader _in;
internal SyncTextReader(TextReader t)
{
_in = t;
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override void Close()
{
// So that any overriden Close() gets run
_in.Close();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
protected override void Dispose(bool disposing)
{
// Explicitly pick up a potentially methodimpl'ed Dispose
if (disposing)
((IDisposable)_in).Dispose();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Peek()
{
return _in.Peek();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Read()
{
return _in.Read();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int Read([In, Out] char[] buffer, int index, int count)
{
return _in.Read(buffer, index, count);
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override int ReadBlock([In, Out] char[] buffer, int index, int count)
{
return _in.ReadBlock(buffer, index, count);
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override String ReadLine()
{
return _in.ReadLine();
}
[MethodImplAttribute(MethodImplOptions.Synchronized)]
public override String ReadToEnd()
{
return _in.ReadToEnd();
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- X509RecipientCertificateServiceElement.cs
- TextTrailingWordEllipsis.cs
- DeviceContext.cs
- ReadOnlyDataSource.cs
- ObjectSecurity.cs
- SqlVersion.cs
- MappedMetaModel.cs
- SelectionRange.cs
- PopupEventArgs.cs
- ElementFactory.cs
- FixedTextSelectionProcessor.cs
- EntityWithChangeTrackerStrategy.cs
- UnhandledExceptionEventArgs.cs
- ReadOnlyDictionary.cs
- CreateUserErrorEventArgs.cs
- ExpressionBuilder.cs
- InfoCardRSAOAEPKeyExchangeDeformatter.cs
- TdsParameterSetter.cs
- Model3DCollection.cs
- MemberMaps.cs
- GroupBox.cs
- EntityDataSourceSelectedEventArgs.cs
- Currency.cs
- Polyline.cs
- TypeConverterMarkupExtension.cs
- AdornerPresentationContext.cs
- CodeExpressionCollection.cs
- TreeIterators.cs
- User.cs
- ListBindingConverter.cs
- NamespaceMapping.cs
- TypedTableBase.cs
- CqlParserHelpers.cs
- OdbcReferenceCollection.cs
- SoapObjectReader.cs
- XmlNode.cs
- Border.cs
- MimeMultiPart.cs
- UnknownExceptionActionHelper.cs
- CalendarAutoFormatDialog.cs
- SmiEventSink_Default.cs
- LayoutEngine.cs
- XmlNavigatorFilter.cs
- Variant.cs
- PropertyDescriptorComparer.cs
- MetadataUtilsSmi.cs
- XhtmlBasicObjectListAdapter.cs
- GeneralTransform3DGroup.cs
- EditBehavior.cs
- ToolStripProfessionalLowResolutionRenderer.cs
- AxImporter.cs
- NestedContainer.cs
- MatchingStyle.cs
- FileSystemInfo.cs
- TransactionProtocol.cs
- CqlIdentifiers.cs
- XmlAttributeCollection.cs
- Style.cs
- RequestCacheEntry.cs
- ItemAutomationPeer.cs
- SecurityUtils.cs
- SerialPort.cs
- GetMemberBinder.cs
- WebRequestModuleElementCollection.cs
- BaseInfoTable.cs
- DataGrid.cs
- UidPropertyAttribute.cs
- XPathDocumentNavigator.cs
- TextTreeUndoUnit.cs
- WithStatement.cs
- AdornedElementPlaceholder.cs
- ExpressionEditorAttribute.cs
- ResourceExpression.cs
- EdmItemError.cs
- NetTcpSection.cs
- StringConverter.cs
- RepeatBehaviorConverter.cs
- RequestQueue.cs
- ListViewUpdatedEventArgs.cs
- HttpDictionary.cs
- SelectionWordBreaker.cs
- _Rfc2616CacheValidators.cs
- GiveFeedbackEventArgs.cs
- SerializationEventsCache.cs
- ZipIOExtraField.cs
- ToolBarPanel.cs
- HttpFileCollection.cs
- SHA512.cs
- TaiwanLunisolarCalendar.cs
- Timer.cs
- FileUpload.cs
- GotoExpression.cs
- UpdateEventArgs.cs
- DataGridItemCollection.cs
- Queue.cs
- MessageQueue.cs
- DeflateEmulationStream.cs
- TypeDependencyAttribute.cs
- CryptoStream.cs
- DocumentReferenceCollection.cs