Code:
/ 4.0 / 4.0 / untmp / 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- InputScopeNameConverter.cs
- TempFiles.cs
- MulticastOption.cs
- FontStretches.cs
- TypeSource.cs
- TiffBitmapEncoder.cs
- QuaternionAnimation.cs
- DiscoveryMessageProperty.cs
- SettingsPropertyValue.cs
- WindowsGraphicsWrapper.cs
- FormatException.cs
- HttpClientCertificate.cs
- ToolStripGripRenderEventArgs.cs
- DrawingServices.cs
- TextLineResult.cs
- MsmqVerifier.cs
- VolatileEnlistmentState.cs
- BuilderPropertyEntry.cs
- ReflectionTypeLoadException.cs
- MediaContext.cs
- ApplicationHost.cs
- DBBindings.cs
- TraceSource.cs
- FileAuthorizationModule.cs
- PerformanceCountersElement.cs
- XmlSchemaExternal.cs
- DataGridBoolColumn.cs
- ExecutionContext.cs
- PointLightBase.cs
- MetabaseServerConfig.cs
- VirtualDirectoryMapping.cs
- FileDialogPermission.cs
- StyleCollectionEditor.cs
- WinEventQueueItem.cs
- AnnotationHighlightLayer.cs
- DragDeltaEventArgs.cs
- InkCanvasAutomationPeer.cs
- EvidenceTypeDescriptor.cs
- MailDefinitionBodyFileNameEditor.cs
- Slider.cs
- ConstructorNeedsTagAttribute.cs
- FixedTextContainer.cs
- TextServicesManager.cs
- CodeAttributeArgument.cs
- CipherData.cs
- WebPartVerbCollection.cs
- RegexCaptureCollection.cs
- XmlDomTextWriter.cs
- EntitySqlException.cs
- VarRefManager.cs
- MembershipPasswordException.cs
- Int32Converter.cs
- ObjectStateEntryDbDataRecord.cs
- XmlUtil.cs
- EntityTypeEmitter.cs
- SAPICategories.cs
- RequestCachePolicyConverter.cs
- StringBuilder.cs
- ObjectCloneHelper.cs
- CodeMemberEvent.cs
- DbTransaction.cs
- SqlDelegatedTransaction.cs
- InternalResources.cs
- PopupEventArgs.cs
- EntityWrapperFactory.cs
- SourceFileBuildProvider.cs
- PeerReferralPolicy.cs
- PartialClassGenerationTaskInternal.cs
- PropertyEntry.cs
- Panel.cs
- ZipIOCentralDirectoryFileHeader.cs
- StrongNameKeyPair.cs
- CodeLabeledStatement.cs
- BitmapInitialize.cs
- EntitySqlException.cs
- UserControl.cs
- SemaphoreFullException.cs
- TextServicesDisplayAttributePropertyRanges.cs
- RadioButtonBaseAdapter.cs
- HyperLinkStyle.cs
- SqlGatherConsumedAliases.cs
- DataServiceBehavior.cs
- FormatterConverter.cs
- StorageMappingItemCollection.cs
- FilteredReadOnlyMetadataCollection.cs
- CodeExporter.cs
- MouseCaptureWithinProperty.cs
- AnimationTimeline.cs
- DataTableExtensions.cs
- DesignBindingValueUIHandler.cs
- BufferedOutputAsyncStream.cs
- SessionPageStatePersister.cs
- DataGridViewControlCollection.cs
- AppDomain.cs
- PathFigureCollectionConverter.cs
- XmlDeclaration.cs
- DataObjectFieldAttribute.cs
- Schema.cs
- WindowsRegion.cs
- ReflectEventDescriptor.cs