Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Util / Hex.cs / 1 / Hex.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /* * Hex.cs * * Operations to convert to and from Hex * */ namespace System.Security.Util { using System; using System.Security; internal static class Hex { // converts number to hex digit. Does not do any range checks. static char HexDigit(int num) { return (char)((num < 10) ? (num + '0') : (num + ('A' - 10))); } public static String EncodeHexString(byte[] sArray) { String result = null; if(sArray != null) { char[] hexOrder = new char[sArray.Length * 2]; int digit; for(int i = 0, j = 0; i < sArray.Length; i++) { digit = (int)((sArray[i] & 0xf0) >> 4); hexOrder[j++] = HexDigit(digit); digit = (int)(sArray[i] & 0x0f); hexOrder[j++] = HexDigit(digit); } result = new String(hexOrder); } return result; } internal static string EncodeHexStringFromInt(byte[] sArray) { String result = null; if(sArray != null) { char[] hexOrder = new char[sArray.Length * 2]; int i = sArray.Length; int digit, j=0; while (i-- > 0) { digit = (sArray[i] & 0xf0) >> 4; hexOrder[j++] = HexDigit(digit); digit = sArray[i] & 0x0f; hexOrder[j++] = HexDigit(digit); } result = new String(hexOrder); } return result; } public static int ConvertHexDigit(Char val) { if (val <= '9' && val >= '0') return (val - '0'); else if (val >= 'a' && val <= 'f') return ((val - 'a') + 10); else if (val >= 'A' && val <= 'F') return ((val - 'A') + 10); else throw new ArgumentException( Environment.GetResourceString( "ArgumentOutOfRange_Index" ) ); } public static byte[] DecodeHexString(String hexString) { if (hexString == null) throw new ArgumentNullException( "hexString" ); bool spaceSkippingMode = false; int i = 0; int length = hexString.Length; if ((length >= 2) && (hexString[0] == '0') && ( (hexString[1] == 'x') || (hexString[1] == 'X') )) { length = hexString.Length - 2; i = 2; } // Hex strings must always have 2N or (3N - 1) entries. if (length % 2 != 0 && length % 3 != 2) { throw new ArgumentException( Environment.GetResourceString( "Argument_InvalidHexFormat" ) ); } byte[] sArray; if (length >=3 && hexString[i + 2] == ' ') { spaceSkippingMode = true; // Each hex digit will take three spaces, except the first (hence the plus 1). sArray = new byte[length / 3 + 1]; } else { // Each hex digit will take two spaces sArray = new byte[length / 2]; } int digit; int rawdigit; for (int j = 0; i < hexString.Length; i += 2, j++) { rawdigit = ConvertHexDigit(hexString[i]); digit = ConvertHexDigit(hexString[i+1]); sArray[j] = (byte) (digit | (rawdigit << 4)); if (spaceSkippingMode) i++; } return(sArray); } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ResourceDictionary.cs
- DataDocumentXPathNavigator.cs
- SafeThemeHandle.cs
- RectangleHotSpot.cs
- SqlParameterCollection.cs
- TemplateDefinition.cs
- MenuItemStyle.cs
- NullToBooleanConverter.cs
- XmlSigningNodeWriter.cs
- BinaryParser.cs
- XmlElementAttributes.cs
- xsdvalidator.cs
- GACMembershipCondition.cs
- RightsManagementEncryptedStream.cs
- SchemaImporterExtensionElementCollection.cs
- DataControlFieldCollection.cs
- Vector3D.cs
- AutomationPropertyInfo.cs
- Config.cs
- EpmSyndicationContentSerializer.cs
- TableCellCollection.cs
- ImportCatalogPart.cs
- SqlOuterApplyReducer.cs
- DataGridItemAutomationPeer.cs
- SpecialNameAttribute.cs
- CodeAttributeDeclarationCollection.cs
- BindingWorker.cs
- LongTypeConverter.cs
- ZipFileInfoCollection.cs
- QueryFunctions.cs
- UIElement3D.cs
- ListSortDescriptionCollection.cs
- BuildManager.cs
- AuthenticationConfig.cs
- RoutingChannelExtension.cs
- BuildProvidersCompiler.cs
- DataSetUtil.cs
- RequestCacheManager.cs
- StatusBarAutomationPeer.cs
- TextViewDesigner.cs
- COMException.cs
- EntityKeyElement.cs
- PerformanceCountersElement.cs
- JsonDataContract.cs
- ComponentManagerBroker.cs
- CanonicalFontFamilyReference.cs
- ScriptControlManager.cs
- Int64Animation.cs
- CodeExporter.cs
- ReferentialConstraint.cs
- TextEditorTables.cs
- PriorityBinding.cs
- SqlWebEventProvider.cs
- ComponentConverter.cs
- ParserExtension.cs
- FixedPosition.cs
- WhitespaceRuleReader.cs
- CharacterBuffer.cs
- LineBreakRecord.cs
- DataListItem.cs
- EngineSiteSapi.cs
- DetailsViewPageEventArgs.cs
- PinnedBufferMemoryStream.cs
- WindowsSysHeader.cs
- Crc32.cs
- DataGridViewIntLinkedList.cs
- ProgressBar.cs
- HelpInfo.cs
- DataGridViewTopRowAccessibleObject.cs
- SqlServices.cs
- BindingsCollection.cs
- FixedSOMImage.cs
- SchemaDeclBase.cs
- MasterPage.cs
- ContractCodeDomInfo.cs
- MouseGesture.cs
- Activation.cs
- SqlGatherConsumedAliases.cs
- _ListenerRequestStream.cs
- ping.cs
- CacheHelper.cs
- EmptyImpersonationContext.cs
- ItemCheckEvent.cs
- BitmapData.cs
- IndependentAnimationStorage.cs
- AuthenticationSection.cs
- PersonalizableAttribute.cs
- MobileCategoryAttribute.cs
- HeaderedContentControl.cs
- ExceptionUtil.cs
- SetUserLanguageRequest.cs
- TrackBar.cs
- TextEditorThreadLocalStore.cs
- CharacterMetricsDictionary.cs
- QilParameter.cs
- DropSource.cs
- BuildProviderUtils.cs
- filewebrequest.cs
- Vector3DAnimation.cs
- Dispatcher.cs