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
- BindingNavigator.cs
- Delegate.cs
- COAUTHINFO.cs
- BlockingCollection.cs
- AccessibleObject.cs
- MailAddressCollection.cs
- ClientTarget.cs
- HostVisual.cs
- UiaCoreTypesApi.cs
- PropertyGroupDescription.cs
- StructureChangedEventArgs.cs
- ShapingEngine.cs
- MediaPlayer.cs
- DecimalAnimation.cs
- ObjectAssociationEndMapping.cs
- Site.cs
- PartEditor.cs
- HttpHandlerActionCollection.cs
- Publisher.cs
- DataBoundLiteralControl.cs
- DataTemplateSelector.cs
- QualifierSet.cs
- TriggerActionCollection.cs
- ObfuscationAttribute.cs
- BindingRestrictions.cs
- ReadContentAsBinaryHelper.cs
- ServiceSettingsResponseInfo.cs
- StateMachineSubscription.cs
- SnapLine.cs
- TabPage.cs
- Rijndael.cs
- CodeSnippetStatement.cs
- ValueTable.cs
- SizeLimitedCache.cs
- ScriptRef.cs
- ObjectManager.cs
- DataKeyCollection.cs
- XmlBinaryReader.cs
- AppSettingsSection.cs
- ListenerConnectionModeReader.cs
- AudioException.cs
- DesignerOptionService.cs
- WorkflowApplicationException.cs
- ProxyWebPartConnectionCollection.cs
- SelectionHighlightInfo.cs
- RegexStringValidator.cs
- Floater.cs
- SqlParameterCollection.cs
- RemotingException.cs
- XamlInt32CollectionSerializer.cs
- LinqDataSourceUpdateEventArgs.cs
- sqlser.cs
- CodePrimitiveExpression.cs
- TransactionTable.cs
- TTSEngineProxy.cs
- SocketAddress.cs
- AdRotator.cs
- CollectionViewSource.cs
- HGlobalSafeHandle.cs
- GridViewRowCollection.cs
- OdbcConnection.cs
- Token.cs
- __TransparentProxy.cs
- MetadataProperty.cs
- FixedDocument.cs
- HwndMouseInputProvider.cs
- StringHandle.cs
- EntitySqlQueryBuilder.cs
- RegexInterpreter.cs
- StringExpressionSet.cs
- DelimitedListTraceListener.cs
- Line.cs
- SortFieldComparer.cs
- ProbeRequestResponseAsyncResult.cs
- ResetableIterator.cs
- DataColumnCollection.cs
- RichTextBox.cs
- XmlSchemaObjectTable.cs
- Panel.cs
- ToolBarPanel.cs
- IdnMapping.cs
- SiteMapNode.cs
- FormViewPagerRow.cs
- InfoCardAsymmetricCrypto.cs
- Point3DConverter.cs
- Transform3D.cs
- BaseTemplateCodeDomTreeGenerator.cs
- Vector3DCollectionConverter.cs
- TraceSection.cs
- mediapermission.cs
- KeyedCollection.cs
- IpcServerChannel.cs
- DbDeleteCommandTree.cs
- FolderBrowserDialogDesigner.cs
- SecurityElement.cs
- IDReferencePropertyAttribute.cs
- VectorConverter.cs
- SimpleApplicationHost.cs
- StylusPointPropertyUnit.cs
- BypassElement.cs