131 lines
4.4 KiB
C#
131 lines
4.4 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: SByte
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//
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// Purpose:
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//
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//===========================================================
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namespace System
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{
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using System.Globalization;
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using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// A place holder class for signed bytes.
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//| <include path='docs/doc[@for="SByte"]/*' />
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[CLSCompliant(false)]
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[System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
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public struct SByte : IComparable, IFormattable
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{
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private sbyte m_value;
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// The maximum value that a Byte may represent: 127.
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//| <include path='docs/doc[@for="SByte.MaxValue"]/*' />
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public const sbyte MaxValue = (sbyte)0x7F;
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// The minimum value that a Byte may represent: -128.
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//| <include path='docs/doc[@for="SByte.MinValue"]/*' />
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public const sbyte MinValue = unchecked((sbyte)0x80);
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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 SByte, this method throws an ArgumentException.
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//
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//| <include path='docs/doc[@for="SByte.CompareTo"]/*' />
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public int CompareTo(Object obj) {
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if (obj == null) {
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return 1;
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}
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if (!(obj is SByte)) {
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throw new ArgumentException ("Arg_MustBeSByte");
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}
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return m_value - ((SByte)obj).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="SByte.Equals"]/*' />
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public override bool Equals(Object obj) {
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if (!(obj is SByte)) {
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return false;
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}
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return m_value == ((SByte)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="SByte.GetHashCode"]/*' />
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public override int GetHashCode() {
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return ((int)m_value ^ (int)m_value << 8);
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}
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// Provides a string representation of a byte.
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//| <include path='docs/doc[@for="SByte.ToString"]/*' />
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public override String ToString() {
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return ToString(null);
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}
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//| <include path='docs/doc[@for="SByte.ToString1"]/*' />
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public String ToString(String format) {
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if (m_value < 0 && format != null && format.Length > 0 && (format[0] =='X' || format[0] =='x')) {
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uint temp = (uint)(m_value & 0x000000FF);
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return Number.FormatUInt32(temp,format);
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}
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return Number.FormatInt32(m_value, format);
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}
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//| <include path='docs/doc[@for="SByte.Parse"]/*' />
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[CLSCompliant(false)]
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public static sbyte Parse(String s) {
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return Parse(s, NumberStyles.Integer);
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}
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// Parses a signed 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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//
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//| <include path='docs/doc[@for="SByte.Parse3"]/*' />
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[CLSCompliant(false)]
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public static sbyte 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 (((style & NumberStyles.AllowHexSpecifier) != 0) && (i <= Byte.MaxValue)) // We are parsing a hexadecimal number
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return (sbyte)i;
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if (i < MinValue || i > MaxValue) throw new OverflowException("Overflow_SByte");
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return (sbyte)i;
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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="SByte.GetTypeCode"]/*' />
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[NoHeapAllocation]
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public override TypeCode GetTypeCode()
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{
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return TypeCode.SByte;
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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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