Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Boolean.cs / 1 / Boolean.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: Boolean ** ** ** Purpose: The boolean class serves as a wrapper for the primitive ** type boolean. ** ** ===========================================================*/ namespace System { using System; using System.Globalization; // The Boolean class provides the // object representation of the boolean primitive type. [Serializable()] [System.Runtime.InteropServices.ComVisible(true)] public struct Boolean : IComparable, IConvertible #if GENERICS_WORK , IComparable, IEquatable #endif { // // Member Variables // private bool m_value; private static char[] m_trimmableChars; // The true value. // internal const int True = 1; // The false value. // internal const int False = 0; // // Internal Constants are real consts for performance. // // The internal string representation of true. // internal const String TrueLiteral = "True"; // The internal string representation of false. // internal const String FalseLiteral = "False"; // // Public Constants // // The public string representation of true. // public static readonly String TrueString = TrueLiteral; // The public string representation of false. // public static readonly String FalseString = FalseLiteral; // // Overriden Instance Methods // /*=================================GetHashCode================================== **Args: None **Returns: 1 or 0 depending on whether this instance represents true or false. **Exceptions: None **Overriden From: Value ==============================================================================*/ // Provides a hash code for this instance. public override int GetHashCode() { return (m_value)?True:False; } /*===================================ToString=================================== **Args: None **Returns: "True" or "False" depending on the state of the boolean. **Exceptions: None. ==============================================================================*/ // Converts the boolean value of this instance to a String. public override String ToString() { if (false == m_value) { return FalseLiteral; } return TrueLiteral; } public String ToString(IFormatProvider provider) { if (false == m_value) { return FalseLiteral; } return TrueLiteral; } // Determines whether two Boolean objects are equal. public override bool Equals (Object obj) { //If it's not a boolean, we're definitely not equal if (!(obj is Boolean)) { return false; } return (m_value==((Boolean)obj).m_value); } public bool Equals(Boolean obj) { return m_value == obj; } // Compares this object to another object, returning an integer that // indicates the relationship. For booleans, false sorts before true. // null is considered to be less than any instance. // If object is not of type boolean, this method throws an ArgumentException. // // Returns a value less than zero if this object // public int CompareTo(Object obj) { if (obj==null) { return 1; } if (!(obj is Boolean)) { throw new ArgumentException (Environment.GetResourceString("Arg_MustBeBoolean")); } if (m_value==((Boolean)obj).m_value) { return 0; } else if (m_value==false) { return -1; } return 1; } public int CompareTo(Boolean value) { if (m_value==value) { return 0; } else if (m_value==false) { return -1; } return 1; } // // Static Methods // // Determines whether a String represents true or false. // public static Boolean Parse (String value) { if (value==null) throw new ArgumentNullException("value"); Boolean result = false; if (!TryParse(value, out result)) { throw new FormatException(Environment.GetResourceString("Format_BadBoolean")); } else { return result; } } // Determines whether a String represents true or false. // public static Boolean TryParse (String value, out Boolean result) { result = false; if (value==null) { return false; } // For perf reasons, let's first see if they're equal, then do the // trim to get rid of white space, and check again. if (TrueLiteral.Equals(value, StringComparison.OrdinalIgnoreCase)) { result = true; return true; } if (FalseLiteral.Equals(value,StringComparison.OrdinalIgnoreCase)) { result = false; return true; } // Special case: Trim whitespace as well as null characters. // Solution: Lazily initialize a new character array including 0x0000 if (null == m_trimmableChars) { char [] m_trimmableCharsTemp = new char[String.WhitespaceChars.Length + 1]; Array.Copy(String.WhitespaceChars, m_trimmableCharsTemp, String.WhitespaceChars.Length); m_trimmableCharsTemp[m_trimmableCharsTemp.Length - 1] = (char) 0x0000; m_trimmableChars = m_trimmableCharsTemp; } value = value.Trim(m_trimmableChars); // Remove leading & trailing white space. if (TrueLiteral.Equals(value, StringComparison.OrdinalIgnoreCase)) { result = true; return true; } if (FalseLiteral.Equals(value,StringComparison.OrdinalIgnoreCase)) { result = false; return true; } return false; } // // IValue implementation // public TypeCode GetTypeCode() { return TypeCode.Boolean; } /// bool IConvertible.ToBoolean(IFormatProvider provider) { return m_value; } /// char IConvertible.ToChar(IFormatProvider provider) { throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Boolean", "Char")); } /// sbyte IConvertible.ToSByte(IFormatProvider provider) { return Convert.ToSByte(m_value); } /// byte IConvertible.ToByte(IFormatProvider provider) { return Convert.ToByte(m_value); } /// short IConvertible.ToInt16(IFormatProvider provider) { return Convert.ToInt16(m_value); } /// ushort IConvertible.ToUInt16(IFormatProvider provider) { return Convert.ToUInt16(m_value); } /// int IConvertible.ToInt32(IFormatProvider provider) { return Convert.ToInt32(m_value); } /// uint IConvertible.ToUInt32(IFormatProvider provider) { return Convert.ToUInt32(m_value); } /// long IConvertible.ToInt64(IFormatProvider provider) { return Convert.ToInt64(m_value); } /// ulong IConvertible.ToUInt64(IFormatProvider provider) { return Convert.ToUInt64(m_value); } /// float IConvertible.ToSingle(IFormatProvider provider) { return Convert.ToSingle(m_value); } /// double IConvertible.ToDouble(IFormatProvider provider) { return Convert.ToDouble(m_value); } /// Decimal IConvertible.ToDecimal(IFormatProvider provider) { return Convert.ToDecimal(m_value); } /// DateTime IConvertible.ToDateTime(IFormatProvider provider) { throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Boolean", "DateTime")); } /// Object IConvertible.ToType(Type type, IFormatProvider provider) { return Convert.DefaultToType((IConvertible)this, type, provider); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: Boolean ** ** ** Purpose: The boolean class serves as a wrapper for the primitive ** type boolean. ** ** ===========================================================*/ namespace System { using System; using System.Globalization; // The Boolean class provides the // object representation of the boolean primitive type. [Serializable()] [System.Runtime.InteropServices.ComVisible(true)] public struct Boolean : IComparable, IConvertible #if GENERICS_WORK , IComparable , IEquatable #endif { // // Member Variables // private bool m_value; private static char[] m_trimmableChars; // The true value. // internal const int True = 1; // The false value. // internal const int False = 0; // // Internal Constants are real consts for performance. // // The internal string representation of true. // internal const String TrueLiteral = "True"; // The internal string representation of false. // internal const String FalseLiteral = "False"; // // Public Constants // // The public string representation of true. // public static readonly String TrueString = TrueLiteral; // The public string representation of false. // public static readonly String FalseString = FalseLiteral; // // Overriden Instance Methods // /*=================================GetHashCode================================== **Args: None **Returns: 1 or 0 depending on whether this instance represents true or false. **Exceptions: None **Overriden From: Value ==============================================================================*/ // Provides a hash code for this instance. public override int GetHashCode() { return (m_value)?True:False; } /*===================================ToString=================================== **Args: None **Returns: "True" or "False" depending on the state of the boolean. **Exceptions: None. ==============================================================================*/ // Converts the boolean value of this instance to a String. public override String ToString() { if (false == m_value) { return FalseLiteral; } return TrueLiteral; } public String ToString(IFormatProvider provider) { if (false == m_value) { return FalseLiteral; } return TrueLiteral; } // Determines whether two Boolean objects are equal. public override bool Equals (Object obj) { //If it's not a boolean, we're definitely not equal if (!(obj is Boolean)) { return false; } return (m_value==((Boolean)obj).m_value); } public bool Equals(Boolean obj) { return m_value == obj; } // Compares this object to another object, returning an integer that // indicates the relationship. For booleans, false sorts before true. // null is considered to be less than any instance. // If object is not of type boolean, this method throws an ArgumentException. // // Returns a value less than zero if this object // public int CompareTo(Object obj) { if (obj==null) { return 1; } if (!(obj is Boolean)) { throw new ArgumentException (Environment.GetResourceString("Arg_MustBeBoolean")); } if (m_value==((Boolean)obj).m_value) { return 0; } else if (m_value==false) { return -1; } return 1; } public int CompareTo(Boolean value) { if (m_value==value) { return 0; } else if (m_value==false) { return -1; } return 1; } // // Static Methods // // Determines whether a String represents true or false. // public static Boolean Parse (String value) { if (value==null) throw new ArgumentNullException("value"); Boolean result = false; if (!TryParse(value, out result)) { throw new FormatException(Environment.GetResourceString("Format_BadBoolean")); } else { return result; } } // Determines whether a String represents true or false. // public static Boolean TryParse (String value, out Boolean result) { result = false; if (value==null) { return false; } // For perf reasons, let's first see if they're equal, then do the // trim to get rid of white space, and check again. if (TrueLiteral.Equals(value, StringComparison.OrdinalIgnoreCase)) { result = true; return true; } if (FalseLiteral.Equals(value,StringComparison.OrdinalIgnoreCase)) { result = false; return true; } // Special case: Trim whitespace as well as null characters. // Solution: Lazily initialize a new character array including 0x0000 if (null == m_trimmableChars) { char [] m_trimmableCharsTemp = new char[String.WhitespaceChars.Length + 1]; Array.Copy(String.WhitespaceChars, m_trimmableCharsTemp, String.WhitespaceChars.Length); m_trimmableCharsTemp[m_trimmableCharsTemp.Length - 1] = (char) 0x0000; m_trimmableChars = m_trimmableCharsTemp; } value = value.Trim(m_trimmableChars); // Remove leading & trailing white space. if (TrueLiteral.Equals(value, StringComparison.OrdinalIgnoreCase)) { result = true; return true; } if (FalseLiteral.Equals(value,StringComparison.OrdinalIgnoreCase)) { result = false; return true; } return false; } // // IValue implementation // public TypeCode GetTypeCode() { return TypeCode.Boolean; } /// bool IConvertible.ToBoolean(IFormatProvider provider) { return m_value; } /// char IConvertible.ToChar(IFormatProvider provider) { throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Boolean", "Char")); } /// sbyte IConvertible.ToSByte(IFormatProvider provider) { return Convert.ToSByte(m_value); } /// byte IConvertible.ToByte(IFormatProvider provider) { return Convert.ToByte(m_value); } /// short IConvertible.ToInt16(IFormatProvider provider) { return Convert.ToInt16(m_value); } /// ushort IConvertible.ToUInt16(IFormatProvider provider) { return Convert.ToUInt16(m_value); } /// int IConvertible.ToInt32(IFormatProvider provider) { return Convert.ToInt32(m_value); } /// uint IConvertible.ToUInt32(IFormatProvider provider) { return Convert.ToUInt32(m_value); } /// long IConvertible.ToInt64(IFormatProvider provider) { return Convert.ToInt64(m_value); } /// ulong IConvertible.ToUInt64(IFormatProvider provider) { return Convert.ToUInt64(m_value); } /// float IConvertible.ToSingle(IFormatProvider provider) { return Convert.ToSingle(m_value); } /// double IConvertible.ToDouble(IFormatProvider provider) { return Convert.ToDouble(m_value); } /// Decimal IConvertible.ToDecimal(IFormatProvider provider) { return Convert.ToDecimal(m_value); } /// DateTime IConvertible.ToDateTime(IFormatProvider provider) { throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Boolean", "DateTime")); } /// Object IConvertible.ToType(Type type, IFormatProvider provider) { return Convert.DefaultToType((IConvertible)this, type, provider); } } } // 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
- ListViewUpdatedEventArgs.cs
- VisualStyleRenderer.cs
- DataListItemEventArgs.cs
- ToolStripPanelSelectionBehavior.cs
- SettingsPropertyCollection.cs
- PowerStatus.cs
- DefaultTextStore.cs
- ExternalException.cs
- DataGridTextBox.cs
- MultiByteCodec.cs
- ManagementNamedValueCollection.cs
- SingleStorage.cs
- ExpandCollapseProviderWrapper.cs
- Zone.cs
- Ports.cs
- IndexerReference.cs
- HitTestParameters3D.cs
- SerializationSectionGroup.cs
- AttachedAnnotation.cs
- XmlSerializationReader.cs
- ComponentChangingEvent.cs
- CommandCollectionEditor.cs
- RepeaterDesigner.cs
- ClickablePoint.cs
- InternalSafeNativeMethods.cs
- DataSourceCache.cs
- Translator.cs
- XPathChildIterator.cs
- TargetControlTypeAttribute.cs
- Axis.cs
- Parsers.cs
- HostnameComparisonMode.cs
- FacetChecker.cs
- UnsafeNativeMethods.cs
- Fx.cs
- PeerSecurityHelpers.cs
- XmlSchemaSimpleTypeRestriction.cs
- ContextMenu.cs
- CompilationPass2TaskInternal.cs
- HttpApplication.cs
- ImageBrush.cs
- FaultContractInfo.cs
- LogStore.cs
- FormattedText.cs
- ToolStripTextBox.cs
- GPRECTF.cs
- RectValueSerializer.cs
- MultiDataTrigger.cs
- KeyToListMap.cs
- Subset.cs
- PrintPreviewDialog.cs
- UriTemplateLiteralQueryValue.cs
- SessionEndingCancelEventArgs.cs
- Style.cs
- XmlNamespaceManager.cs
- Command.cs
- WindowsSlider.cs
- DependencyPropertyValueSerializer.cs
- OdbcEnvironment.cs
- XmlImplementation.cs
- DataError.cs
- ComboBoxItem.cs
- MetafileHeaderWmf.cs
- PropertyPathWorker.cs
- NativeMethods.cs
- MeasurementDCInfo.cs
- RelatedImageListAttribute.cs
- MaskedTextBox.cs
- Propagator.JoinPropagator.cs
- MsmqTransportSecurityElement.cs
- GeometryGroup.cs
- ParamArrayAttribute.cs
- FixedPageAutomationPeer.cs
- DataBinding.cs
- SelectionItemPattern.cs
- ConnectorSelectionGlyph.cs
- TimeZone.cs
- SqlProviderServices.cs
- ElementMarkupObject.cs
- Encoding.cs
- ZipIOModeEnforcingStream.cs
- CrossContextChannel.cs
- GifBitmapDecoder.cs
- TemplateField.cs
- NetworkStream.cs
- PathGeometry.cs
- RelOps.cs
- XPathMultyIterator.cs
- KeysConverter.cs
- SecurityPermission.cs
- EditorZoneBase.cs
- DurableTimerExtension.cs
- DecoderNLS.cs
- FlowDocumentPaginator.cs
- Hex.cs
- ChtmlPageAdapter.cs
- DataStorage.cs
- Win32SafeHandles.cs
- BinaryObjectWriter.cs
- OutputCacheModule.cs