Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Resources / __FastResourceComparer.cs / 1305376 / __FastResourceComparer.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** **[....] ** ** Class: FastResourceComparer ** ** ** Purpose: A collection of quick methods for comparing ** resource keys (strings) ** ** ===========================================================*/ namespace System.Resources { using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics.Contracts; internal sealed class FastResourceComparer : IComparer, IEqualityComparer, IComparer, IEqualityComparer { internal static readonly FastResourceComparer Default = new FastResourceComparer(); // Implements IHashCodeProvider too, due to Hashtable requirements. public int GetHashCode(Object key) { String s = (String) key; return FastResourceComparer.HashFunction(s); } public int GetHashCode(String key) { return FastResourceComparer.HashFunction(key); } // This hash function MUST be publically documented with the resource // file format, AND we may NEVER change this hash function's return // value (without changing the file format). internal static int HashFunction(String key) { // Never change this hash function. We must standardize it so that // others can read & write our .resources files. Additionally, we // have a copy of it in InternalResGen as well. uint hash = 5381; for(int i=0; i bCharLength) numChars = bCharLength; if (bCharLength == 0) // Can't use fixed on a 0-element array. return (a.Length == 0) ? 0 : -1; fixed(byte* pb = bytes) { byte *pChar = pb; while (i < numChars && r == 0) { // little endian format int b = pChar[0] | pChar[1] << 8; r = a[i++] - b; pChar += sizeof(char); } } if (r != 0) return r; return a.Length - bCharLength; } [System.Security.SecurityCritical] // auto-generated public static int CompareOrdinal(byte[] bytes, int aCharLength, String b) { return -CompareOrdinal(b, bytes, aCharLength); } // This method is to handle potentially misaligned data accesses. // The byte* must point to little endian Unicode characters. [System.Security.SecurityCritical] // auto-generated internal unsafe static int CompareOrdinal(byte* a, int byteLen, String b) { Contract.Assert((byteLen & 1) == 0, "CompareOrdinal is expecting a UTF-16 string length, which must be even!"); Contract.Assert(a != null && b != null, "Null args not allowed."); Contract.Assert(byteLen >= 0, "byteLen must be non-negative."); int r = 0; int i = 0; // Compare the min length # of characters, then return length diffs. int numChars = byteLen >> 1; if (numChars > b.Length) numChars = b.Length; while(i < numChars && r == 0) { // Must compare character by character, not byte by byte. char aCh = (char) (*a++ | (*a++ << 8)); r = aCh - b[i++]; } if (r != 0) return r; return byteLen - b.Length * 2; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** [....] ** ** Class: FastResourceComparer ** ** ** Purpose: A collection of quick methods for comparing ** resource keys (strings) ** ** ===========================================================*/ namespace System.Resources { using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics.Contracts; internal sealed class FastResourceComparer : IComparer, IEqualityComparer, IComparer, IEqualityComparer { internal static readonly FastResourceComparer Default = new FastResourceComparer(); // Implements IHashCodeProvider too, due to Hashtable requirements. public int GetHashCode(Object key) { String s = (String) key; return FastResourceComparer.HashFunction(s); } public int GetHashCode(String key) { return FastResourceComparer.HashFunction(key); } // This hash function MUST be publically documented with the resource // file format, AND we may NEVER change this hash function's return // value (without changing the file format). internal static int HashFunction(String key) { // Never change this hash function. We must standardize it so that // others can read & write our .resources files. Additionally, we // have a copy of it in InternalResGen as well. uint hash = 5381; for(int i=0; i bCharLength) numChars = bCharLength; if (bCharLength == 0) // Can't use fixed on a 0-element array. return (a.Length == 0) ? 0 : -1; fixed(byte* pb = bytes) { byte *pChar = pb; while (i < numChars && r == 0) { // little endian format int b = pChar[0] | pChar[1] << 8; r = a[i++] - b; pChar += sizeof(char); } } if (r != 0) return r; return a.Length - bCharLength; } [System.Security.SecurityCritical] // auto-generated public static int CompareOrdinal(byte[] bytes, int aCharLength, String b) { return -CompareOrdinal(b, bytes, aCharLength); } // This method is to handle potentially misaligned data accesses. // The byte* must point to little endian Unicode characters. [System.Security.SecurityCritical] // auto-generated internal unsafe static int CompareOrdinal(byte* a, int byteLen, String b) { Contract.Assert((byteLen & 1) == 0, "CompareOrdinal is expecting a UTF-16 string length, which must be even!"); Contract.Assert(a != null && b != null, "Null args not allowed."); Contract.Assert(byteLen >= 0, "byteLen must be non-negative."); int r = 0; int i = 0; // Compare the min length # of characters, then return length diffs. int numChars = byteLen >> 1; if (numChars > b.Length) numChars = b.Length; while(i < numChars && r == 0) { // Must compare character by character, not byte by byte. char aCh = (char) (*a++ | (*a++ << 8)); r = aCh - b[i++]; } if (r != 0) return r; return byteLen - b.Length * 2; } } } // 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
- Parser.cs
- InstanceOwnerQueryResult.cs
- CodeExpressionStatement.cs
- Message.cs
- TypeDescriptor.cs
- _Connection.cs
- DiscoveryDefaults.cs
- PartBasedPackageProperties.cs
- SystemResourceHost.cs
- HyperLinkDataBindingHandler.cs
- ActivityTypeCodeDomSerializer.cs
- VerticalAlignConverter.cs
- ComplexBindingPropertiesAttribute.cs
- Blend.cs
- RectangleGeometry.cs
- DataGridRowsPresenter.cs
- DataTablePropertyDescriptor.cs
- PrimitiveXmlSerializers.cs
- StaticExtensionConverter.cs
- FramingFormat.cs
- RenderDataDrawingContext.cs
- WindowsSecurityTokenAuthenticator.cs
- FormViewDeleteEventArgs.cs
- SafeHandles.cs
- PathData.cs
- DateTimeFormatInfo.cs
- SqlDataSourceSelectingEventArgs.cs
- TypeReference.cs
- SafeSystemMetrics.cs
- SmtpException.cs
- AlphaSortedEnumConverter.cs
- AssociationSetMetadata.cs
- ScriptControlManager.cs
- OrderByQueryOptionExpression.cs
- InstanceHandleReference.cs
- OSEnvironmentHelper.cs
- DrawingDrawingContext.cs
- IndexerNameAttribute.cs
- LayoutExceptionEventArgs.cs
- PropertyInfoSet.cs
- MaskedTextBoxTextEditor.cs
- LinearQuaternionKeyFrame.cs
- XhtmlMobileTextWriter.cs
- AvTraceFormat.cs
- AttributeCollection.cs
- ScriptingWebServicesSectionGroup.cs
- ValidatedControlConverter.cs
- CodeObject.cs
- ExpressionList.cs
- CacheRequest.cs
- UserInitiatedNavigationPermission.cs
- UInt32Converter.cs
- HandlerFactoryCache.cs
- XPathNavigatorKeyComparer.cs
- XmlEntity.cs
- Propagator.Evaluator.cs
- KeyboardInputProviderAcquireFocusEventArgs.cs
- UserControl.cs
- FixedTextSelectionProcessor.cs
- ScriptResourceHandler.cs
- ProjectedSlot.cs
- AutomationIdentifierGuids.cs
- SelectionService.cs
- OleDbCommandBuilder.cs
- _AutoWebProxyScriptWrapper.cs
- ToolStripRenderer.cs
- NavigationPropertyEmitter.cs
- AutoResetEvent.cs
- FamilyMap.cs
- PackageController.cs
- XmlToDatasetMap.cs
- Rijndael.cs
- StorageEndPropertyMapping.cs
- EdmConstants.cs
- X509Utils.cs
- PointLight.cs
- URIFormatException.cs
- DataRelationCollection.cs
- CmsInterop.cs
- XmlHierarchicalDataSourceView.cs
- XNodeNavigator.cs
- DrawTreeNodeEventArgs.cs
- OdbcReferenceCollection.cs
- Model3DGroup.cs
- DataControlLinkButton.cs
- MainMenu.cs
- CollectionConverter.cs
- SiteMapDataSourceDesigner.cs
- LabelExpression.cs
- PreviewPageInfo.cs
- HTTPNotFoundHandler.cs
- Mouse.cs
- NamespaceInfo.cs
- ImageDesigner.cs
- List.cs
- Adorner.cs
- CodeAttributeArgumentCollection.cs
- PersonalizationStateQuery.cs
- ADRole.cs
- DragSelectionMessageFilter.cs