Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Resources / __FastResourceComparer.cs / 1 / __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; 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; } 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. internal unsafe static int CompareOrdinal(byte* a, int byteLen, String b) { BCLDebug.Assert((byteLen & 1) == 0, "CompareOrdinal is expecting a UTF-16 string length, which must be even!"); BCLDebug.Assert(a != null && b != null, "Null args not allowed."); BCLDebug.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; 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; } 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. internal unsafe static int CompareOrdinal(byte* a, int byteLen, String b) { BCLDebug.Assert((byteLen & 1) == 0, "CompareOrdinal is expecting a UTF-16 string length, which must be even!"); BCLDebug.Assert(a != null && b != null, "Null args not allowed."); BCLDebug.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
- ActivityCodeGenerator.cs
- StickyNoteHelper.cs
- ObjectQuery_EntitySqlExtensions.cs
- DbgUtil.cs
- MultitargetingHelpers.cs
- NullableConverter.cs
- ReadOnlyKeyedCollection.cs
- PerfCounters.cs
- EventLogPermissionEntryCollection.cs
- ListViewGroupItemCollection.cs
- KnownBoxes.cs
- CodeSnippetExpression.cs
- ScaleTransform3D.cs
- DesignerSerializerAttribute.cs
- hebrewshape.cs
- EntityExpressionVisitor.cs
- WebPartZoneCollection.cs
- ResourceReferenceExpressionConverter.cs
- TdsParser.cs
- TrackingServices.cs
- MobileErrorInfo.cs
- XmlSchemaAttributeGroupRef.cs
- WindowsTooltip.cs
- IBuiltInEvidence.cs
- WebPartCollection.cs
- entityreference_tresulttype.cs
- ADMembershipProvider.cs
- MultiByteCodec.cs
- __Error.cs
- metadatamappinghashervisitor.cs
- HttpBindingExtension.cs
- AndMessageFilterTable.cs
- ClientSettings.cs
- QilParameter.cs
- TextBounds.cs
- InvalidProgramException.cs
- DefaultValueConverter.cs
- MostlySingletonList.cs
- SHA512Managed.cs
- RuleSetDialog.Designer.cs
- IPipelineRuntime.cs
- Rotation3DAnimation.cs
- JpegBitmapEncoder.cs
- RegularExpressionValidator.cs
- StorageEntitySetMapping.cs
- _DisconnectOverlappedAsyncResult.cs
- DeferredElementTreeState.cs
- GeneralTransform3DCollection.cs
- SecureUICommand.cs
- SharedPerformanceCounter.cs
- DataKeyArray.cs
- DefinitionUpdate.cs
- InputBindingCollection.cs
- X509IssuerSerialKeyIdentifierClause.cs
- FastEncoderWindow.cs
- GlobalProxySelection.cs
- BindingMAnagerBase.cs
- EntityDataSourceChangingEventArgs.cs
- SHA1Managed.cs
- QuaternionRotation3D.cs
- ValidateNames.cs
- DateTime.cs
- CreateUserWizardAutoFormat.cs
- CurrentChangingEventManager.cs
- DesignTimeVisibleAttribute.cs
- SparseMemoryStream.cs
- ReadOnlyDataSource.cs
- OrCondition.cs
- SqlCharStream.cs
- XPathNodePointer.cs
- InkCanvasInnerCanvas.cs
- DefaultParameterValueAttribute.cs
- DataConnectionHelper.cs
- SchemaCollectionCompiler.cs
- SizeChangedEventArgs.cs
- KeyNotFoundException.cs
- UnionQueryOperator.cs
- MethodImplAttribute.cs
- TraceUtils.cs
- NativeMethods.cs
- DesignTimeSiteMapProvider.cs
- HtmlMeta.cs
- DifferencingCollection.cs
- SslStream.cs
- Config.cs
- Encoding.cs
- WindowAutomationPeer.cs
- hresults.cs
- MDIControlStrip.cs
- CatalogZone.cs
- BlockExpression.cs
- PowerModeChangedEventArgs.cs
- safelink.cs
- LocatorPartList.cs
- ImageCollectionEditor.cs
- LineGeometry.cs
- GB18030Encoding.cs
- ReliableDuplexSessionChannel.cs
- TableLayoutColumnStyleCollection.cs
- ConstrainedGroup.cs