Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / StringComparer.cs / 1 / StringComparer.cs
namespace System { using System.Collections; using System.Collections.Generic; using System.Globalization; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class StringComparer : IComparer, IEqualityComparer, IComparer, IEqualityComparer { private static StringComparer _invariantCulture = new CultureAwareComparer(CultureInfo.InvariantCulture, false); private static StringComparer _invariantCultureIgnoreCase = new CultureAwareComparer(CultureInfo.InvariantCulture, true); private static StringComparer _ordinal = new OrdinalComparer(false); private static StringComparer _ordinalIgnoreCase = new OrdinalComparer(true); public static StringComparer InvariantCulture { get { return _invariantCulture; } } public static StringComparer InvariantCultureIgnoreCase { get { return _invariantCultureIgnoreCase; } } public static StringComparer CurrentCulture { get { return new CultureAwareComparer(CultureInfo.CurrentCulture, false); } } public static StringComparer CurrentCultureIgnoreCase { get { return new CultureAwareComparer(CultureInfo.CurrentCulture, true); } } public static StringComparer Ordinal { get { return _ordinal; } } public static StringComparer OrdinalIgnoreCase { get { return _ordinalIgnoreCase; } } public static StringComparer Create(CultureInfo culture, bool ignoreCase) { if( culture == null) { throw new ArgumentNullException("culture"); } 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"); } 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"); } 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 TextInfo.CompareOrdinalIgnoreCase(x, y); } 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 (TextInfo.CompareOrdinalIgnoreCase(x, y) == 0); } return x.Equals(y); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } 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; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class StringComparer : IComparer, IEqualityComparer, IComparer , IEqualityComparer { private static StringComparer _invariantCulture = new CultureAwareComparer(CultureInfo.InvariantCulture, false); private static StringComparer _invariantCultureIgnoreCase = new CultureAwareComparer(CultureInfo.InvariantCulture, true); private static StringComparer _ordinal = new OrdinalComparer(false); private static StringComparer _ordinalIgnoreCase = new OrdinalComparer(true); public static StringComparer InvariantCulture { get { return _invariantCulture; } } public static StringComparer InvariantCultureIgnoreCase { get { return _invariantCultureIgnoreCase; } } public static StringComparer CurrentCulture { get { return new CultureAwareComparer(CultureInfo.CurrentCulture, false); } } public static StringComparer CurrentCultureIgnoreCase { get { return new CultureAwareComparer(CultureInfo.CurrentCulture, true); } } public static StringComparer Ordinal { get { return _ordinal; } } public static StringComparer OrdinalIgnoreCase { get { return _ordinalIgnoreCase; } } public static StringComparer Create(CultureInfo culture, bool ignoreCase) { if( culture == null) { throw new ArgumentNullException("culture"); } 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"); } 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"); } 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 TextInfo.CompareOrdinalIgnoreCase(x, y); } 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 (TextInfo.CompareOrdinalIgnoreCase(x, y) == 0); } return x.Equals(y); } public override int GetHashCode(string obj) { if( obj == null) { throw new ArgumentNullException("obj"); } 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Command.cs
- ScopeElement.cs
- Padding.cs
- InfoCardRSAPKCS1SignatureDeformatter.cs
- ProxyAttribute.cs
- DataGridViewCheckBoxCell.cs
- ClientTarget.cs
- FlowDocumentReader.cs
- SqlBuffer.cs
- StylusButton.cs
- MembershipValidatePasswordEventArgs.cs
- TypeDescriptionProvider.cs
- Logging.cs
- WebPartDescription.cs
- ImageCollectionEditor.cs
- ModelFactory.cs
- OracleException.cs
- SqlFlattener.cs
- ProfileEventArgs.cs
- StringDictionary.cs
- StrokeRenderer.cs
- OleDbPropertySetGuid.cs
- IgnoreFileBuildProvider.cs
- BitmapSource.cs
- IndexedWhereQueryOperator.cs
- TextUtf8RawTextWriter.cs
- SortKey.cs
- DatatypeImplementation.cs
- XmlWrappingReader.cs
- DefaultPropertiesToSend.cs
- WindowsGraphicsCacheManager.cs
- PageOutputColor.cs
- HostingPreferredMapPath.cs
- _TransmitFileOverlappedAsyncResult.cs
- CommonProperties.cs
- ConfigPathUtility.cs
- CacheDependency.cs
- XsltInput.cs
- GPPOINT.cs
- SmuggledIUnknown.cs
- XmlComment.cs
- EntityDataSourceMemberPath.cs
- ViewSimplifier.cs
- ItemChangedEventArgs.cs
- InputScopeConverter.cs
- DataGridLength.cs
- TableLayoutColumnStyleCollection.cs
- httpstaticobjectscollection.cs
- ClientSession.cs
- TableLayoutRowStyleCollection.cs
- ExceptionRoutedEventArgs.cs
- TextServicesDisplayAttributePropertyRanges.cs
- AccessibilityApplicationManager.cs
- TableRowCollection.cs
- LogLogRecordEnumerator.cs
- ClientUriBehavior.cs
- PointIndependentAnimationStorage.cs
- CodeDOMUtility.cs
- SQLBoolean.cs
- _NestedSingleAsyncResult.cs
- ErrorFormatterPage.cs
- DrawItemEvent.cs
- Query.cs
- MdbDataFileEditor.cs
- RelationshipNavigation.cs
- DBCSCodePageEncoding.cs
- TextBox.cs
- DeflateEmulationStream.cs
- RedirectionProxy.cs
- TypeNameConverter.cs
- InvalidDataContractException.cs
- DataContext.cs
- CanExpandCollapseAllConverter.cs
- ParameterElement.cs
- SqlProviderUtilities.cs
- MimeTypeAttribute.cs
- StringUtil.cs
- CounterCreationDataConverter.cs
- LinkClickEvent.cs
- UInt32Converter.cs
- ColorAnimation.cs
- PowerModeChangedEventArgs.cs
- NumericExpr.cs
- SignatureResourcePool.cs
- ProviderConnectionPointCollection.cs
- TypeBrowser.xaml.cs
- TextServicesDisplayAttribute.cs
- ToolStripMenuItemCodeDomSerializer.cs
- DataTrigger.cs
- ActiveDesignSurfaceEvent.cs
- Transform.cs
- CalculatedColumn.cs
- HttpInputStream.cs
- Brush.cs
- IDQuery.cs
- Converter.cs
- GlobalAclOperationRequirement.cs
- EndpointDiscoveryMetadataCD1.cs
- SelectionHighlightInfo.cs
- SqlUnionizer.cs