Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / 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
- DrawingAttributesDefaultValueFactory.cs
- CancellationTokenRegistration.cs
- IdentityReference.cs
- FilterException.cs
- ArglessEventHandlerProxy.cs
- CredentialCache.cs
- DispatcherEventArgs.cs
- DbSource.cs
- OleDbErrorCollection.cs
- Vector3dCollection.cs
- FamilyTypefaceCollection.cs
- DateTimeValueSerializer.cs
- RepeaterItemCollection.cs
- SoapSchemaImporter.cs
- UpDownBase.cs
- CompositeFontParser.cs
- LicenseProviderAttribute.cs
- BuildResult.cs
- ActivityCompletionCallbackWrapper.cs
- BaseTreeIterator.cs
- MessageRpc.cs
- WebServicesInteroperability.cs
- HostedElements.cs
- RichTextBoxDesigner.cs
- BrowserCapabilitiesFactoryBase.cs
- SQLGuid.cs
- ModulesEntry.cs
- ellipse.cs
- FillRuleValidation.cs
- TcpStreams.cs
- X509Extension.cs
- SessionSwitchEventArgs.cs
- ByteKeyFrameCollection.cs
- EventProviderClassic.cs
- RTLAwareMessageBox.cs
- LoginView.cs
- DbConnectionPoolIdentity.cs
- RequestTimeoutManager.cs
- Stream.cs
- SamlAudienceRestrictionCondition.cs
- TableLayoutRowStyleCollection.cs
- WebPartDisplayModeEventArgs.cs
- XmlDocumentViewSchema.cs
- UpdateRecord.cs
- PassportAuthentication.cs
- StrokeCollection2.cs
- PriorityRange.cs
- RoleGroup.cs
- BamlBinaryWriter.cs
- XPathExpr.cs
- Event.cs
- CatalogPart.cs
- ControlIdConverter.cs
- DES.cs
- FormatException.cs
- HttpServerChannel.cs
- NameValuePair.cs
- XPathNavigatorReader.cs
- CompilerResults.cs
- WCFModelStrings.Designer.cs
- XsltArgumentList.cs
- Size3D.cs
- ChangeInterceptorAttribute.cs
- IssuanceLicense.cs
- CodeCommentStatementCollection.cs
- SqlBulkCopy.cs
- XamlClipboardData.cs
- EditorResources.cs
- XmlHierarchyData.cs
- ColorTransform.cs
- ApplicationBuildProvider.cs
- ImageFormatConverter.cs
- ExtentKey.cs
- ClassHandlersStore.cs
- CheckedPointers.cs
- EntityProviderServices.cs
- TypeHelpers.cs
- PerformanceCounter.cs
- VisualStyleRenderer.cs
- HttpPostLocalhostServerProtocol.cs
- TextSelection.cs
- AdPostCacheSubstitution.cs
- StringSource.cs
- PlainXmlDeserializer.cs
- Descriptor.cs
- Compilation.cs
- GroupByQueryOperator.cs
- RequestCacheEntry.cs
- ChangeBlockUndoRecord.cs
- CodeIterationStatement.cs
- RefreshEventArgs.cs
- QuaternionConverter.cs
- TableDetailsRow.cs
- RegistryConfigurationProvider.cs
- ListViewGroup.cs
- Queue.cs
- EventHandlersStore.cs
- DataRowView.cs
- XsdBuildProvider.cs
- ReferenceConverter.cs