121 lines
4.0 KiB
C#
121 lines
4.0 KiB
C#
// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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//============================================================
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//
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// Class: Byte
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//
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// Purpose: This class will encapsulate a byte and provide an
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// Object representation of it.
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//
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//===========================================================
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namespace System
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{
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using System;
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using System.Globalization;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// The Byte class extends the Value class and
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// provides object representation of the byte primitive type.
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//
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//| <include path='docs/doc[@for="Byte"]/*' />
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[StructLayout(LayoutKind.Sequential)]
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public struct Byte : IComparable, IFormattable
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{
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private byte m_value;
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// The maximum value that a Byte may represent: 255.
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//| <include path='docs/doc[@for="Byte.MaxValue"]/*' />
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public const byte MaxValue = (byte)0xFF;
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// The minimum value that a Byte may represent: 0.
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//| <include path='docs/doc[@for="Byte.MinValue"]/*' />
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public const byte MinValue = 0;
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// Compares this object to another object, returning an integer that
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// indicates the relationship.
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// Returns a value less than zero if this object
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// null is considered to be less than any instance.
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// If object is not of type byte, this method throws an ArgumentException.
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//
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//| <include path='docs/doc[@for="Byte.CompareTo"]/*' />
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public int CompareTo(Object value) {
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if (value == null) {
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return 1;
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}
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if (!(value is Byte)) {
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throw new ArgumentException("Arg_MustBeByte");
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}
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return m_value - (((Byte)value).m_value);
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}
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// Determines whether two Byte objects are equal.
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//| <include path='docs/doc[@for="Byte.Equals"]/*' />
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public override bool Equals(Object obj) {
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if (!(obj is Byte)) {
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return false;
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}
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return m_value == ((Byte)obj).m_value;
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}
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// Gets a hash code for this instance.
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//| <include path='docs/doc[@for="Byte.GetHashCode"]/*' />
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public override int GetHashCode() {
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return m_value;
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}
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//| <include path='docs/doc[@for="Byte.Parse"]/*' />
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public static byte Parse(String s) {
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return Parse(s, NumberStyles.Integer);
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}
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// Parses an unsigned byte from a String in the given style. If
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// a NumberFormatInfo isn't specified, the current culture's
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// NumberFormatInfo is assumed.
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//| <include path='docs/doc[@for="Byte.Parse3"]/*' />
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public static byte Parse(String s, NumberStyles style) {
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NumberFormatInfo.ValidateParseStyle(style);
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int i = Number.ParseInt32(s, style);
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if (i < MinValue || i > MaxValue) throw new OverflowException("Overflow_Byte");
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return (byte)i;
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}
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//| <include path='docs/doc[@for="Byte.ToString"]/*' />
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public override String ToString() {
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return Number.FormatInt32(m_value, null);
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}
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//| <include path='docs/doc[@for="Byte.ToString1"]/*' />
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public String ToString(String format) {
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return Number.FormatInt32(m_value, format);
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}
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//
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// IValue implementation
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//
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//| <include path='docs/doc[@for="Byte.GetTypeCode"]/*' />
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[NoHeapAllocation]
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public override TypeCode GetTypeCode() {
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return TypeCode.Byte;
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}
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//
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// This is just designed to prevent compiler warnings.
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// This field is used from native, but we need to prevent the compiler warnings.
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//
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#if _DEBUG
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private void DontTouchThis() {
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m_value = m_value;
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}
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#endif
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}
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}
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