Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / StringComparer.cs / 1305376 / StringComparer.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System { using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Diagnostics.Contracts; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class StringComparer : IComparer, IEqualityComparer, IComparer, IEqualityComparer { private static readonly StringComparer _invariantCulture = new CultureAwareComparer(CultureInfo.InvariantCulture, false); private static readonly StringComparer _invariantCultureIgnoreCase = new CultureAwareComparer(CultureInfo.InvariantCulture, true); private static readonly StringComparer _ordinal = new OrdinalComparer(false); private static readonly StringComparer _ordinalIgnoreCase = new OrdinalComparer(true); public static StringComparer InvariantCulture { get { Contract.Ensures(Contract.Result () != null); return _invariantCulture; } } public static StringComparer InvariantCultureIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return _invariantCultureIgnoreCase; } } public static StringComparer CurrentCulture { get { Contract.Ensures(Contract.Result () != null); return new CultureAwareComparer(CultureInfo.CurrentCulture, false); } } public static StringComparer CurrentCultureIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return new CultureAwareComparer(CultureInfo.CurrentCulture, true); } } public static StringComparer Ordinal { get { Contract.Ensures(Contract.Result () != null); return _ordinal; } } public static StringComparer OrdinalIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return _ordinalIgnoreCase; } } public static StringComparer Create(CultureInfo culture, bool ignoreCase) { if( culture == null) { throw new ArgumentNullException("culture"); } Contract.Ensures(Contract.Result () != null); Contract.EndContractBlock(); return new CultureAwareComparer(culture, ignoreCase); } public int Compare(object x, object y) { if (x == y) return 0; if (x == null) return -1; if (y == null) return 1; String sa = x as String; if (sa != null) { String sb = y as String; if( sb != null) { return Compare(sa, sb); } } IComparable ia = x as IComparable; if (ia != null) { return ia.CompareTo(y); } throw new ArgumentException(Environment.GetResourceString("Argument_ImplementIComparable")); } public new bool Equals(Object x, Object y) { if (x == y) return true; if (x == null || y == null) return false; String sa = x as String; if (sa != null) { String sb = y as String; if( sb != null) { return Equals(sa, sb); } } return x.Equals(y); } public int GetHashCode(object obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); string s = obj as string; if( s != null) { return GetHashCode(s); } return obj.GetHashCode(); } public abstract int Compare(String x, String y); public abstract bool Equals(String x, String y); public abstract int GetHashCode(string obj); } [Serializable] internal sealed class CultureAwareComparer : StringComparer { private CompareInfo _compareInfo; private bool _ignoreCase; internal CultureAwareComparer(CultureInfo culture, bool ignoreCase) { _compareInfo = culture.CompareInfo; _ignoreCase = ignoreCase; } public override int Compare(string x, string y) { if (Object.ReferenceEquals(x, y)) return 0; if (x == null) return -1; if (y == null) return 1; return _compareInfo.Compare(x, y, _ignoreCase? CompareOptions.IgnoreCase : CompareOptions.None); } public override bool Equals(string x, string y) { if (Object.ReferenceEquals(x ,y)) return true; if (x == null || y == null) return false; return (_compareInfo.Compare(x, y, _ignoreCase? CompareOptions.IgnoreCase : CompareOptions.None) == 0); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); if( _ignoreCase) { return _compareInfo.GetHashCodeOfString(obj, CompareOptions.IgnoreCase); } return _compareInfo.GetHashCodeOfString(obj, CompareOptions.None); } // Equals method for the comparer itself. public override bool Equals(Object obj){ CultureAwareComparer comparer = obj as CultureAwareComparer; if( comparer == null) { return false; } return (this._ignoreCase == comparer._ignoreCase) && ( this._compareInfo.Equals(comparer._compareInfo)); } public override int GetHashCode() { int hashCode = _compareInfo.GetHashCode() ; return _ignoreCase ? (~hashCode) : hashCode; } } // Provide x more optimal implementation of ordinal comparison. [Serializable] internal sealed class OrdinalComparer : StringComparer { private bool _ignoreCase; internal OrdinalComparer(bool ignoreCase) { _ignoreCase = ignoreCase; } public override int Compare(string x, string y) { if (Object.ReferenceEquals(x, y)) return 0; if (x == null) return -1; if (y == null) return 1; if( _ignoreCase) { return String.Compare(x, y, StringComparison.OrdinalIgnoreCase); } return String.CompareOrdinal(x, y); } public override bool Equals(string x, string y) { if (Object.ReferenceEquals(x ,y)) return true; if (x == null || y == null) return false; if( _ignoreCase) { if( x.Length != y.Length) { return false; } return (String.Compare(x, y, StringComparison.OrdinalIgnoreCase) == 0); } return x.Equals(y); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); if( _ignoreCase) { return TextInfo.GetHashCodeOrdinalIgnoreCase(obj); } return obj.GetHashCode(); } // Equals method for the comparer itself. public override bool Equals(Object obj){ OrdinalComparer comparer = obj as OrdinalComparer; if( comparer == null) { return false; } return (this._ignoreCase == comparer._ignoreCase); } public override int GetHashCode() { string name = "OrdinalComparer"; int hashCode = name.GetHashCode(); return _ignoreCase ? (~hashCode) : hashCode; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System { using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Diagnostics.Contracts; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class StringComparer : IComparer, IEqualityComparer, IComparer , IEqualityComparer { private static readonly StringComparer _invariantCulture = new CultureAwareComparer(CultureInfo.InvariantCulture, false); private static readonly StringComparer _invariantCultureIgnoreCase = new CultureAwareComparer(CultureInfo.InvariantCulture, true); private static readonly StringComparer _ordinal = new OrdinalComparer(false); private static readonly StringComparer _ordinalIgnoreCase = new OrdinalComparer(true); public static StringComparer InvariantCulture { get { Contract.Ensures(Contract.Result () != null); return _invariantCulture; } } public static StringComparer InvariantCultureIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return _invariantCultureIgnoreCase; } } public static StringComparer CurrentCulture { get { Contract.Ensures(Contract.Result () != null); return new CultureAwareComparer(CultureInfo.CurrentCulture, false); } } public static StringComparer CurrentCultureIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return new CultureAwareComparer(CultureInfo.CurrentCulture, true); } } public static StringComparer Ordinal { get { Contract.Ensures(Contract.Result () != null); return _ordinal; } } public static StringComparer OrdinalIgnoreCase { get { Contract.Ensures(Contract.Result () != null); return _ordinalIgnoreCase; } } public static StringComparer Create(CultureInfo culture, bool ignoreCase) { if( culture == null) { throw new ArgumentNullException("culture"); } Contract.Ensures(Contract.Result () != null); Contract.EndContractBlock(); return new CultureAwareComparer(culture, ignoreCase); } public int Compare(object x, object y) { if (x == y) return 0; if (x == null) return -1; if (y == null) return 1; String sa = x as String; if (sa != null) { String sb = y as String; if( sb != null) { return Compare(sa, sb); } } IComparable ia = x as IComparable; if (ia != null) { return ia.CompareTo(y); } throw new ArgumentException(Environment.GetResourceString("Argument_ImplementIComparable")); } public new bool Equals(Object x, Object y) { if (x == y) return true; if (x == null || y == null) return false; String sa = x as String; if (sa != null) { String sb = y as String; if( sb != null) { return Equals(sa, sb); } } return x.Equals(y); } public int GetHashCode(object obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); string s = obj as string; if( s != null) { return GetHashCode(s); } return obj.GetHashCode(); } public abstract int Compare(String x, String y); public abstract bool Equals(String x, String y); public abstract int GetHashCode(string obj); } [Serializable] internal sealed class CultureAwareComparer : StringComparer { private CompareInfo _compareInfo; private bool _ignoreCase; internal CultureAwareComparer(CultureInfo culture, bool ignoreCase) { _compareInfo = culture.CompareInfo; _ignoreCase = ignoreCase; } public override int Compare(string x, string y) { if (Object.ReferenceEquals(x, y)) return 0; if (x == null) return -1; if (y == null) return 1; return _compareInfo.Compare(x, y, _ignoreCase? CompareOptions.IgnoreCase : CompareOptions.None); } public override bool Equals(string x, string y) { if (Object.ReferenceEquals(x ,y)) return true; if (x == null || y == null) return false; return (_compareInfo.Compare(x, y, _ignoreCase? CompareOptions.IgnoreCase : CompareOptions.None) == 0); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); if( _ignoreCase) { return _compareInfo.GetHashCodeOfString(obj, CompareOptions.IgnoreCase); } return _compareInfo.GetHashCodeOfString(obj, CompareOptions.None); } // Equals method for the comparer itself. public override bool Equals(Object obj){ CultureAwareComparer comparer = obj as CultureAwareComparer; if( comparer == null) { return false; } return (this._ignoreCase == comparer._ignoreCase) && ( this._compareInfo.Equals(comparer._compareInfo)); } public override int GetHashCode() { int hashCode = _compareInfo.GetHashCode() ; return _ignoreCase ? (~hashCode) : hashCode; } } // Provide x more optimal implementation of ordinal comparison. [Serializable] internal sealed class OrdinalComparer : StringComparer { private bool _ignoreCase; internal OrdinalComparer(bool ignoreCase) { _ignoreCase = ignoreCase; } public override int Compare(string x, string y) { if (Object.ReferenceEquals(x, y)) return 0; if (x == null) return -1; if (y == null) return 1; if( _ignoreCase) { return String.Compare(x, y, StringComparison.OrdinalIgnoreCase); } return String.CompareOrdinal(x, y); } public override bool Equals(string x, string y) { if (Object.ReferenceEquals(x ,y)) return true; if (x == null || y == null) return false; if( _ignoreCase) { if( x.Length != y.Length) { return false; } return (String.Compare(x, y, StringComparison.OrdinalIgnoreCase) == 0); } return x.Equals(y); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } Contract.EndContractBlock(); if( _ignoreCase) { return TextInfo.GetHashCodeOrdinalIgnoreCase(obj); } return obj.GetHashCode(); } // Equals method for the comparer itself. public override bool Equals(Object obj){ OrdinalComparer comparer = obj as OrdinalComparer; if( comparer == null) { return false; } return (this._ignoreCase == comparer._ignoreCase); } public override int GetHashCode() { string name = "OrdinalComparer"; int hashCode = name.GetHashCode(); return _ignoreCase ? (~hashCode) : hashCode; } } } // 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
- NativeMethods.cs
- DataGridCellItemAutomationPeer.cs
- CodeAssignStatement.cs
- TextEvent.cs
- _UncName.cs
- GridViewItemAutomationPeer.cs
- Pair.cs
- JoinQueryOperator.cs
- SecurityTokenValidationException.cs
- PTUtility.cs
- Help.cs
- Merger.cs
- ToolStripLabel.cs
- ApplicationSecurityInfo.cs
- ArraySortHelper.cs
- UserValidatedEventArgs.cs
- SessionPageStateSection.cs
- DecimalAnimation.cs
- DbParameterHelper.cs
- NotifyInputEventArgs.cs
- RTTrackingProfile.cs
- PropertyStore.cs
- StylusPointCollection.cs
- ProcessingInstructionAction.cs
- CompilerState.cs
- SingleConverter.cs
- DataMemberAttribute.cs
- XmlSchemaSimpleContentRestriction.cs
- ParameterToken.cs
- Event.cs
- CleanUpVirtualizedItemEventArgs.cs
- InsufficientMemoryException.cs
- Control.cs
- PathData.cs
- OrderingQueryOperator.cs
- XmlReader.cs
- AnimationStorage.cs
- SemaphoreSecurity.cs
- FrameworkObject.cs
- TextSelectionHighlightLayer.cs
- ObjectSpanRewriter.cs
- XsdBuildProvider.cs
- InstanceNotReadyException.cs
- DbMetaDataCollectionNames.cs
- MetadataPropertyCollection.cs
- SponsorHelper.cs
- TypedRowHandler.cs
- ContextProperty.cs
- DataControlButton.cs
- RepeaterItemEventArgs.cs
- Application.cs
- BeginStoryboard.cs
- OutputCacheModule.cs
- MimeImporter.cs
- ServiceModelActivationSectionGroup.cs
- DataFormat.cs
- TransportManager.cs
- OleDbTransaction.cs
- UserControl.cs
- CriticalExceptions.cs
- TripleDES.cs
- X509Certificate.cs
- TextureBrush.cs
- COM2EnumConverter.cs
- TraceSwitch.cs
- StorageEntityTypeMapping.cs
- WebPartPersonalization.cs
- ValidationEventArgs.cs
- AutomationPatternInfo.cs
- InstallerTypeAttribute.cs
- MobileControlsSection.cs
- OperationAbortedException.cs
- WindowsScrollBarBits.cs
- Switch.cs
- XhtmlBasicControlAdapter.cs
- TriggerAction.cs
- DbLambda.cs
- BinaryFormatterWriter.cs
- MouseGestureValueSerializer.cs
- Separator.cs
- PathFigure.cs
- DispatcherFrame.cs
- TrustLevelCollection.cs
- HttpServerVarsCollection.cs
- NoneExcludedImageIndexConverter.cs
- SimplePropertyEntry.cs
- GroupQuery.cs
- DotNetATv1WindowsLogEntrySerializer.cs
- Stackframe.cs
- SerialErrors.cs
- ToolStripTemplateNode.cs
- DataColumnPropertyDescriptor.cs
- TextBoxBase.cs
- PageCodeDomTreeGenerator.cs
- Avt.cs
- SHA512.cs
- RijndaelCryptoServiceProvider.cs
- XPathNodeIterator.cs
- HttpApplicationFactory.cs
- SpeakCompletedEventArgs.cs