Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / BCL / System / Text / DecoderReplacementFallback.cs / 1 / DecoderReplacementFallback.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // DecoderReplacementFallback.cs // namespace System.Text { using System; [Serializable] public sealed class DecoderReplacementFallback : DecoderFallback { // Our variables private String strDefault; // Construction. Default replacement fallback uses no best fit and ? replacement string public DecoderReplacementFallback() : this("?") { } public DecoderReplacementFallback(String replacement) { if (replacement == null) throw new ArgumentNullException("replacement"); // Make sure it doesn't have bad surrogate pairs bool bFoundHigh=false; for (int i = 0; i < replacement.Length; i++) { // Found a surrogate? if (Char.IsSurrogate(replacement,i)) { // High or Low? if (Char.IsHighSurrogate(replacement, i)) { // if already had a high one, stop if (bFoundHigh) break; // break & throw at the bFoundHIgh below bFoundHigh = true; } else { // Low, did we have a high? if (!bFoundHigh) { // Didn't have one, make if fail when we stop bFoundHigh = true; break; } // Clear flag bFoundHigh = false; } } // If last was high we're in trouble (not surrogate so not low surrogate, so break) else if (bFoundHigh) break; } if (bFoundHigh) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidCharSequenceNoIndex", "replacement")); strDefault = replacement; } public String DefaultString { get { return strDefault; } } public override DecoderFallbackBuffer CreateFallbackBuffer() { return new DecoderReplacementFallbackBuffer(this); } // Maximum number of characters that this instance of this fallback could return public override int MaxCharCount { get { return strDefault.Length; } } public override bool Equals(Object value) { DecoderReplacementFallback that = value as DecoderReplacementFallback; if (that != null) { return (this.strDefault == that.strDefault); } return (false); } public override int GetHashCode() { return strDefault.GetHashCode(); } } public sealed class DecoderReplacementFallbackBuffer : DecoderFallbackBuffer { // Store our default string private String strDefault; int fallbackCount = -1; int fallbackIndex = -1; // Construction public DecoderReplacementFallbackBuffer(DecoderReplacementFallback fallback) { this.strDefault = fallback.DefaultString; } // Fallback Methods public override bool Fallback(byte[] bytesUnknown, int index) { // We expect no previous fallback in our buffer BCLDebug.Assert(fallbackCount < 1, "[DecoderReplacementFallbackBuffer.Fallback] Calling fallback without a previously empty buffer"); // We can't call recursively but others might (note, we don't test on last char!!!) if (fallbackCount >= 1) { ThrowLastBytesRecursive(bytesUnknown); } // Go ahead and get our fallback if (strDefault.Length == 0) return false; fallbackCount = strDefault.Length; fallbackIndex = -1; return true; } public override char GetNextChar() { // We want it to get < 0 because == 0 means that the current/last character is a fallback // and we need to detect recursion. We could have a flag but we already have this counter. fallbackCount--; fallbackIndex++; // Do we have anything left? 0 is now last fallback char, negative is nothing left if (fallbackCount < 0) return (char)0; // Need to get it out of the buffer. BCLDebug.Assert(fallbackIndex < strDefault.Length && fallbackIndex >= 0, "Index exceeds buffer range"); return strDefault[fallbackIndex]; } public override bool MovePrevious() { // Back up one, only if we just processed the last character (or earlier) if (fallbackCount >= -1 && fallbackIndex >= 0) { fallbackIndex--; fallbackCount++; return true; } // Return false 'cause we couldn't do it. return false; } // How many characters left to output? public override int Remaining { get { // Our count is 0 for 1 character left. return (fallbackCount < 0) ? 0 : fallbackCount; } } // Clear the buffer public override unsafe void Reset() { fallbackCount = -1; fallbackIndex = -1; byteStart = null; } // This version just counts the fallback and doesn't actually copy anything. internal unsafe override int InternalFallback(byte[] bytes, byte* pBytes) // Right now this has both bytes and bytes[], which is ----, but we might have extra bytes, hence the // array, and we might need the index, hence the byte* { // return our replacement string Length return strDefault.Length; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // DecoderReplacementFallback.cs // namespace System.Text { using System; [Serializable] public sealed class DecoderReplacementFallback : DecoderFallback { // Our variables private String strDefault; // Construction. Default replacement fallback uses no best fit and ? replacement string public DecoderReplacementFallback() : this("?") { } public DecoderReplacementFallback(String replacement) { if (replacement == null) throw new ArgumentNullException("replacement"); // Make sure it doesn't have bad surrogate pairs bool bFoundHigh=false; for (int i = 0; i < replacement.Length; i++) { // Found a surrogate? if (Char.IsSurrogate(replacement,i)) { // High or Low? if (Char.IsHighSurrogate(replacement, i)) { // if already had a high one, stop if (bFoundHigh) break; // break & throw at the bFoundHIgh below bFoundHigh = true; } else { // Low, did we have a high? if (!bFoundHigh) { // Didn't have one, make if fail when we stop bFoundHigh = true; break; } // Clear flag bFoundHigh = false; } } // If last was high we're in trouble (not surrogate so not low surrogate, so break) else if (bFoundHigh) break; } if (bFoundHigh) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidCharSequenceNoIndex", "replacement")); strDefault = replacement; } public String DefaultString { get { return strDefault; } } public override DecoderFallbackBuffer CreateFallbackBuffer() { return new DecoderReplacementFallbackBuffer(this); } // Maximum number of characters that this instance of this fallback could return public override int MaxCharCount { get { return strDefault.Length; } } public override bool Equals(Object value) { DecoderReplacementFallback that = value as DecoderReplacementFallback; if (that != null) { return (this.strDefault == that.strDefault); } return (false); } public override int GetHashCode() { return strDefault.GetHashCode(); } } public sealed class DecoderReplacementFallbackBuffer : DecoderFallbackBuffer { // Store our default string private String strDefault; int fallbackCount = -1; int fallbackIndex = -1; // Construction public DecoderReplacementFallbackBuffer(DecoderReplacementFallback fallback) { this.strDefault = fallback.DefaultString; } // Fallback Methods public override bool Fallback(byte[] bytesUnknown, int index) { // We expect no previous fallback in our buffer BCLDebug.Assert(fallbackCount < 1, "[DecoderReplacementFallbackBuffer.Fallback] Calling fallback without a previously empty buffer"); // We can't call recursively but others might (note, we don't test on last char!!!) if (fallbackCount >= 1) { ThrowLastBytesRecursive(bytesUnknown); } // Go ahead and get our fallback if (strDefault.Length == 0) return false; fallbackCount = strDefault.Length; fallbackIndex = -1; return true; } public override char GetNextChar() { // We want it to get < 0 because == 0 means that the current/last character is a fallback // and we need to detect recursion. We could have a flag but we already have this counter. fallbackCount--; fallbackIndex++; // Do we have anything left? 0 is now last fallback char, negative is nothing left if (fallbackCount < 0) return (char)0; // Need to get it out of the buffer. BCLDebug.Assert(fallbackIndex < strDefault.Length && fallbackIndex >= 0, "Index exceeds buffer range"); return strDefault[fallbackIndex]; } public override bool MovePrevious() { // Back up one, only if we just processed the last character (or earlier) if (fallbackCount >= -1 && fallbackIndex >= 0) { fallbackIndex--; fallbackCount++; return true; } // Return false 'cause we couldn't do it. return false; } // How many characters left to output? public override int Remaining { get { // Our count is 0 for 1 character left. return (fallbackCount < 0) ? 0 : fallbackCount; } } // Clear the buffer public override unsafe void Reset() { fallbackCount = -1; fallbackIndex = -1; byteStart = null; } // This version just counts the fallback and doesn't actually copy anything. internal unsafe override int InternalFallback(byte[] bytes, byte* pBytes) // Right now this has both bytes and bytes[], which is ----, but we might have extra bytes, hence the // array, and we might need the index, hence the byte* { // return our replacement string Length return strDefault.Length; } } } // 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
- EventRoute.cs
- Int16.cs
- InlineCollection.cs
- SchemaImporterExtensionElement.cs
- ComNativeDescriptor.cs
- StandardOleMarshalObject.cs
- TransformCryptoHandle.cs
- SqlDataSource.cs
- EventMappingSettingsCollection.cs
- TimelineGroup.cs
- JsonDeserializer.cs
- CompositeCollection.cs
- COM2PropertyDescriptor.cs
- GridSplitterAutomationPeer.cs
- webbrowsersite.cs
- BuildManagerHost.cs
- SystemIPInterfaceStatistics.cs
- DoubleUtil.cs
- MatrixAnimationUsingKeyFrames.cs
- StoreConnection.cs
- ProcessHost.cs
- QueryContinueDragEventArgs.cs
- LocatorPart.cs
- SqlConnectionStringBuilder.cs
- AdPostCacheSubstitution.cs
- ZipIOFileItemStream.cs
- Utils.cs
- MethodToken.cs
- WindowsMenu.cs
- SimpleBitVector32.cs
- LineBreakRecord.cs
- DataStreamFromComStream.cs
- Aggregates.cs
- PathFigure.cs
- ReferentialConstraintRoleElement.cs
- PolyQuadraticBezierSegment.cs
- InkPresenter.cs
- ExceptionDetail.cs
- PageThemeCodeDomTreeGenerator.cs
- SpeechSeg.cs
- MimeMultiPart.cs
- sapiproxy.cs
- PolyBezierSegment.cs
- RequestSecurityTokenResponseCollection.cs
- Decoder.cs
- AssociationSet.cs
- AppDomainCompilerProxy.cs
- RemoteArgument.cs
- cookiecontainer.cs
- AuthenticationModuleElementCollection.cs
- Peer.cs
- HttpStaticObjectsCollectionBase.cs
- SoapProtocolReflector.cs
- Internal.cs
- TrackingAnnotationCollection.cs
- ScrollBarRenderer.cs
- PixelFormat.cs
- CollectionEditorDialog.cs
- SchemaImporterExtension.cs
- xmlsaver.cs
- QilTernary.cs
- NavigatorOutput.cs
- EmbeddedObject.cs
- UTF7Encoding.cs
- XmlDocumentType.cs
- ClearCollection.cs
- BuilderPropertyEntry.cs
- CodeCompileUnit.cs
- LoginCancelEventArgs.cs
- CodeDOMProvider.cs
- DbConnectionStringCommon.cs
- ContextProperty.cs
- ComplexTypeEmitter.cs
- ContextMenuAutomationPeer.cs
- GlobalProxySelection.cs
- ListDictionaryInternal.cs
- SelectedCellsChangedEventArgs.cs
- Schema.cs
- TextEditorTyping.cs
- WindowsEditBoxRange.cs
- AbstractDataSvcMapFileLoader.cs
- XPathScanner.cs
- UrlAuthorizationModule.cs
- SchemaComplexType.cs
- EmulateRecognizeCompletedEventArgs.cs
- _LoggingObject.cs
- XmlSchemaDatatype.cs
- Inflater.cs
- PolicyLevel.cs
- CommandDesigner.cs
- WrapPanel.cs
- DoubleStorage.cs
- GroupBoxDesigner.cs
- MenuItemCollectionEditor.cs
- FlowPosition.cs
- SoapReflectionImporter.cs
- DbProviderFactory.cs
- DrawingBrush.cs
- SmtpAuthenticationManager.cs
- ScrollChrome.cs