Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Util / CodePageUtils.cs / 1305376 / CodePageUtils.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Util { using System.Collections; // // Utility class to help with determining if a given code page // is ASCII compatible (preserves 0-127 Unicode characters as is) // internal static class CodePageUtils { /* The following array of ASCII compatible code pages is generated by running this code on a machine that has _many_ codepages installed: using System; using System.Collections; using System.Text; public class qq { public static void Main(string[] args) { ArrayList list = new ArrayList(); byte[] bb = new byte[128]; for (int i = 0; i < 128; i++) bb[i] = (byte)i; String asciiString = Encoding.ASCII.GetString(bb); for (int i = 1; i < 100000; i++) { try { Encoding e = Encoding.GetEncoding(i); byte[] xx = e.GetBytes(asciiString); if (xx.Length == 128) { bool good = true; for (int j = 0; j < 128; j++) { if (bb[j] != xx[j]) { good = false; break; } } if (good) list.Add(i); } } catch {} } int n = list.Count; Console.Write("private const int[] _asciiCompatCodePages = new int[" + n + "] {\r\n "); for (int i = 0; i < n; i++) { Console.Write("{0,5}", list[i]); if (i < n-1) Console.Write(", "); if (((i+1) % 10) == 0) Console.Write("\r\n "); } Console.Write("\r\n};\r\n"); } } */ private static int[] _asciiCompatCodePages = new int[79] { 437, 708, 720, 737, 775, 850, 852, 855, 857, 858, 860, 861, 862, 863, 864, 865, 866, 869, 874, 932, 936, 949, 950, 1250, 1251, 1252, 1253, 1254, 1255, 1256, 1257, 1258, 1361, 10000, 10001, 10002, 10003, 10004, 10005, 10006, 10007, 10008, 10010, 10017, 10029, 10079, 10081, 10082, 20000, 20001, 20002, 20003, 20004, 20005, 20127, 20866, 20932, 20936, 20949, 21866, 28591, 28592, 28593, 28594, 28595, 28596, 28597, 28598, 28599, 28605, 38598, 50220, 50221, 50222, 50225, 50227, 51932, 51949, 65001 }; internal /*public*/ static bool IsAsciiCompatibleCodePage(int codepage) { //alternatives to binary search considered //Hashtable: static initialization increases startup up, perf relative //Byte array would consume ~8K, but lookups constant //with 80 entries, binary search limited to 7 indexes into array int lo = 0; int hi = 78; while(lo <= hi) { int i = (lo + hi) >> 1; int c; c = _asciiCompatCodePages[i] - codepage; if (c == 0) return true; //i is the index of the item if (c < 0) { lo = i + 1; } else { hi = i - 1; } } return false; //lo is the index of the item immediately after //~lo returned in some implementations for false indicator with additional info } internal const int CodePageUT8 = 65001; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Util { using System.Collections; // // Utility class to help with determining if a given code page // is ASCII compatible (preserves 0-127 Unicode characters as is) // internal static class CodePageUtils { /* The following array of ASCII compatible code pages is generated by running this code on a machine that has _many_ codepages installed: using System; using System.Collections; using System.Text; public class qq { public static void Main(string[] args) { ArrayList list = new ArrayList(); byte[] bb = new byte[128]; for (int i = 0; i < 128; i++) bb[i] = (byte)i; String asciiString = Encoding.ASCII.GetString(bb); for (int i = 1; i < 100000; i++) { try { Encoding e = Encoding.GetEncoding(i); byte[] xx = e.GetBytes(asciiString); if (xx.Length == 128) { bool good = true; for (int j = 0; j < 128; j++) { if (bb[j] != xx[j]) { good = false; break; } } if (good) list.Add(i); } } catch {} } int n = list.Count; Console.Write("private const int[] _asciiCompatCodePages = new int[" + n + "] {\r\n "); for (int i = 0; i < n; i++) { Console.Write("{0,5}", list[i]); if (i < n-1) Console.Write(", "); if (((i+1) % 10) == 0) Console.Write("\r\n "); } Console.Write("\r\n};\r\n"); } } */ private static int[] _asciiCompatCodePages = new int[79] { 437, 708, 720, 737, 775, 850, 852, 855, 857, 858, 860, 861, 862, 863, 864, 865, 866, 869, 874, 932, 936, 949, 950, 1250, 1251, 1252, 1253, 1254, 1255, 1256, 1257, 1258, 1361, 10000, 10001, 10002, 10003, 10004, 10005, 10006, 10007, 10008, 10010, 10017, 10029, 10079, 10081, 10082, 20000, 20001, 20002, 20003, 20004, 20005, 20127, 20866, 20932, 20936, 20949, 21866, 28591, 28592, 28593, 28594, 28595, 28596, 28597, 28598, 28599, 28605, 38598, 50220, 50221, 50222, 50225, 50227, 51932, 51949, 65001 }; internal /*public*/ static bool IsAsciiCompatibleCodePage(int codepage) { //alternatives to binary search considered //Hashtable: static initialization increases startup up, perf relative //Byte array would consume ~8K, but lookups constant //with 80 entries, binary search limited to 7 indexes into array int lo = 0; int hi = 78; while(lo <= hi) { int i = (lo + hi) >> 1; int c; c = _asciiCompatCodePages[i] - codepage; if (c == 0) return true; //i is the index of the item if (c < 0) { lo = i + 1; } else { hi = i - 1; } } return false; //lo is the index of the item immediately after //~lo returned in some implementations for false indicator with additional info } internal const int CodePageUT8 = 65001; } } // 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
- DataColumnMappingCollection.cs
- GridViewCellAutomationPeer.cs
- HealthMonitoringSection.cs
- NumericPagerField.cs
- TreeViewCancelEvent.cs
- XmlSchemaComplexType.cs
- SapiRecoContext.cs
- SqlGenericUtil.cs
- QueryableDataSourceView.cs
- PerfService.cs
- SchemaType.cs
- MimeBasePart.cs
- MasterPageParser.cs
- Run.cs
- FixedBufferAttribute.cs
- CustomGrammar.cs
- GridProviderWrapper.cs
- ReadContentAsBinaryHelper.cs
- BezierSegment.cs
- AdornerHitTestResult.cs
- DataControlFieldCell.cs
- FunctionNode.cs
- TypeNameHelper.cs
- StylusPointPropertyUnit.cs
- SqlCharStream.cs
- _SingleItemRequestCache.cs
- WebConfigurationHost.cs
- ClientBuildManagerCallback.cs
- Directory.cs
- GeometryValueSerializer.cs
- DataControlFieldCell.cs
- InternalPermissions.cs
- WebEventTraceProvider.cs
- CodeEventReferenceExpression.cs
- BreakSafeBase.cs
- FieldNameLookup.cs
- RegionInfo.cs
- RawStylusInputCustomDataList.cs
- InstanceView.cs
- RawKeyboardInputReport.cs
- BitmapEffectGroup.cs
- CodeGeneratorOptions.cs
- XmlNodeChangedEventArgs.cs
- Int16Converter.cs
- ActivityDelegate.cs
- LassoHelper.cs
- New.cs
- AspCompat.cs
- ScopelessEnumAttribute.cs
- HtmlShim.cs
- CaseInsensitiveComparer.cs
- Group.cs
- Html32TextWriter.cs
- LayoutManager.cs
- ApplicationGesture.cs
- ClientScriptManager.cs
- RolePrincipal.cs
- COM2ExtendedBrowsingHandler.cs
- ErrorWrapper.cs
- InheritanceContextChangedEventManager.cs
- FlowDocumentFormatter.cs
- ShutDownListener.cs
- Image.cs
- SmtpLoginAuthenticationModule.cs
- ConditionBrowserDialog.cs
- RootDesignerSerializerAttribute.cs
- FixUp.cs
- WebResourceUtil.cs
- OracleColumn.cs
- MeasureItemEvent.cs
- PageAsyncTask.cs
- ThreadExceptionDialog.cs
- HttpRequest.cs
- PageHandlerFactory.cs
- EngineSiteSapi.cs
- KnownTypesHelper.cs
- LowerCaseStringConverter.cs
- BigIntegerStorage.cs
- ListViewInsertedEventArgs.cs
- QueryInterceptorAttribute.cs
- OdbcHandle.cs
- MaskedTextBoxDesigner.cs
- NumberSubstitution.cs
- UInt16Converter.cs
- DiffuseMaterial.cs
- CounterSampleCalculator.cs
- DataGridViewImageColumn.cs
- Geometry3D.cs
- XmlDataImplementation.cs
- LoginDesignerUtil.cs
- EncryptedPackageFilter.cs
- XslNumber.cs
- DNS.cs
- RegisteredDisposeScript.cs
- MobileControlsSectionHelper.cs
- EntityContainerEmitter.cs
- XmlTextEncoder.cs
- StreamWithDictionary.cs
- ItemChangedEventArgs.cs
- assertwrapper.cs