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
- RawStylusInput.cs
- WebSysDefaultValueAttribute.cs
- XmlWhitespace.cs
- ReferenceConverter.cs
- CheckedListBox.cs
- XmlDataSourceNodeDescriptor.cs
- Stack.cs
- TileModeValidation.cs
- TableItemStyle.cs
- NameValueConfigurationElement.cs
- HeaderedItemsControl.cs
- QueryGenerator.cs
- EntityDesignerUtils.cs
- DesignerTextViewAdapter.cs
- LoginUtil.cs
- AsyncContentLoadedEventArgs.cs
- XamlInt32CollectionSerializer.cs
- ToolStripItemClickedEventArgs.cs
- WeakReferenceKey.cs
- PropertyMetadata.cs
- PackageRelationship.cs
- SinglePageViewer.cs
- InvalidAsynchronousStateException.cs
- SpnegoTokenAuthenticator.cs
- HtmlWindowCollection.cs
- FrameDimension.cs
- MailFileEditor.cs
- RuntimeEnvironment.cs
- DataGridState.cs
- InteropTrackingRecord.cs
- TypeUsage.cs
- ActiveDocumentEvent.cs
- ThreadPool.cs
- HttpListenerResponse.cs
- XComponentModel.cs
- ArrayList.cs
- Normalization.cs
- Filter.cs
- TextBoxLine.cs
- TextWriter.cs
- NetMsmqBinding.cs
- CollectionDataContractAttribute.cs
- ReliabilityContractAttribute.cs
- HttpListenerResponse.cs
- PropertyMapper.cs
- HttpWebRequestElement.cs
- ValueUtilsSmi.cs
- _NetRes.cs
- followingsibling.cs
- TextAnchor.cs
- DockingAttribute.cs
- QilPatternFactory.cs
- GenerateScriptTypeAttribute.cs
- ReadOnlyMetadataCollection.cs
- MatrixTransform3D.cs
- ConnectionConsumerAttribute.cs
- DbConnectionPoolGroup.cs
- CharConverter.cs
- TreeNodeStyle.cs
- UnmanagedBitmapWrapper.cs
- IPPacketInformation.cs
- Keywords.cs
- CodeGotoStatement.cs
- DataObjectFieldAttribute.cs
- RowVisual.cs
- ToolStripDesignerUtils.cs
- SecurityHelper.cs
- SafeArrayTypeMismatchException.cs
- XmlEntity.cs
- MouseButtonEventArgs.cs
- HostingEnvironmentException.cs
- SecurityDescriptor.cs
- XmlSchemaNotation.cs
- DesignTimeParseData.cs
- ArrayItemReference.cs
- DataControlButton.cs
- CharEntityEncoderFallback.cs
- IListConverters.cs
- TypeDescriptor.cs
- SqlTypeSystemProvider.cs
- Rectangle.cs
- SettingsAttributes.cs
- ToolStripGrip.cs
- DtdParser.cs
- SortQueryOperator.cs
- X509CertificateCollection.cs
- DataGridViewTopLeftHeaderCell.cs
- IsolatedStorage.cs
- ActivityMarkupSerializer.cs
- CompareValidator.cs
- AxParameterData.cs
- Header.cs
- XPathNodeHelper.cs
- ConditionCollection.cs
- SHA256Cng.cs
- DetailsViewActionList.cs
- StringConcat.cs
- ListComponentEditor.cs
- VariantWrapper.cs
- WSSecurityOneDotZeroReceiveSecurityHeader.cs