400 lines
14 KiB
C#
400 lines
14 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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**
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** Purpose:
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**
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**
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===========================================================*/
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namespace System {
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using System.Globalization;
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using System;
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///#if GENERICS_WORK
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/// using System.Numerics;
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///#endif
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using System.Runtime.InteropServices;
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using System.Diagnostics.Contracts;
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// A place holder class for signed bytes.
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[Serializable]
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[CLSCompliant(false), System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
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[System.Runtime.InteropServices.ComVisible(true)]
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#if GENERICS_WORK
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public struct SByte : IComparable, IFormattable, IConvertible
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, IComparable<SByte>, IEquatable<SByte>
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/// , IArithmetic<SByte>
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#else
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public struct SByte : IComparable, IFormattable, IConvertible
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#endif
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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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public const sbyte MaxValue = (sbyte)0x7F;
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// The minimum value that a Byte may represent: -128.
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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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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 (Environment.GetResourceString("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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public int CompareTo(SByte value) {
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return m_value - value;
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}
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// Determines whether two Byte objects are equal.
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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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[System.Runtime.Versioning.NonVersionable]
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public bool Equals(SByte obj)
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{
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return m_value == obj;
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}
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// Gets a hash code for this instance.
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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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[System.Security.SecuritySafeCritical] // auto-generated
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public override String ToString() {
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Contract.Ensures(Contract.Result<String>() != null);
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return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo);
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}
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[System.Security.SecuritySafeCritical] // auto-generated
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public String ToString(IFormatProvider provider) {
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Contract.Ensures(Contract.Result<String>() != null);
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return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider));
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}
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public String ToString(String format) {
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Contract.Ensures(Contract.Result<String>() != null);
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return ToString(format, NumberFormatInfo.CurrentInfo);
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}
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public String ToString(String format, IFormatProvider provider) {
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Contract.Ensures(Contract.Result<String>() != null);
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return ToString(format, NumberFormatInfo.GetInstance(provider));
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}
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[System.Security.SecuritySafeCritical] // auto-generated
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private String ToString(String format, NumberFormatInfo info) {
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Contract.Ensures(Contract.Result<String>() != null);
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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, info);
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}
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return Number.FormatInt32(m_value, format, info);
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}
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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, NumberFormatInfo.CurrentInfo);
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}
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[CLSCompliant(false)]
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public static sbyte Parse(String s, NumberStyles style) {
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NumberFormatInfo.ValidateParseStyleInteger(style);
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return Parse(s, style, NumberFormatInfo.CurrentInfo);
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}
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[CLSCompliant(false)]
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public static sbyte Parse(String s, IFormatProvider provider) {
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return Parse(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
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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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[CLSCompliant(false)]
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public static sbyte Parse(String s, NumberStyles style, IFormatProvider provider) {
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NumberFormatInfo.ValidateParseStyleInteger(style);
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return Parse(s, style, NumberFormatInfo.GetInstance(provider));
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}
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private static sbyte Parse(String s, NumberStyles style, NumberFormatInfo info) {
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int i = 0;
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try {
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i = Number.ParseInt32(s, style, info);
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}
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catch(OverflowException e) {
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throw new OverflowException(Environment.GetResourceString("Overflow_SByte"), e);
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}
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if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number
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if ((i < 0) || i > Byte.MaxValue) {
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throw new OverflowException(Environment.GetResourceString("Overflow_SByte"));
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}
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return (sbyte)i;
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}
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if (i < MinValue || i > MaxValue) throw new OverflowException(Environment.GetResourceString("Overflow_SByte"));
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return (sbyte)i;
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}
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[CLSCompliant(false)]
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public static bool TryParse(String s, out SByte result) {
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return TryParse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
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}
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[CLSCompliant(false)]
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public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out SByte result) {
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NumberFormatInfo.ValidateParseStyleInteger(style);
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return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
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}
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private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out SByte result) {
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result = 0;
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int i;
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if (!Number.TryParseInt32(s, style, info, out i)) {
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return false;
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}
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if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number
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if ((i < 0) || i > Byte.MaxValue) {
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return false;
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}
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result = (sbyte)i;
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return true;
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}
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if (i < MinValue || i > MaxValue) {
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return false;
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}
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result = (sbyte) i;
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return true;
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}
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//
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// IConvertible implementation
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//
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public TypeCode GetTypeCode() {
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return TypeCode.SByte;
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}
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/// <internalonly/>
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bool IConvertible.ToBoolean(IFormatProvider provider) {
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return Convert.ToBoolean(m_value);
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}
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/// <internalonly/>
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char IConvertible.ToChar(IFormatProvider provider) {
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return Convert.ToChar(m_value);
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}
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/// <internalonly/>
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sbyte IConvertible.ToSByte(IFormatProvider provider) {
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return m_value;
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}
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/// <internalonly/>
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byte IConvertible.ToByte(IFormatProvider provider) {
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return Convert.ToByte(m_value);
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}
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/// <internalonly/>
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short IConvertible.ToInt16(IFormatProvider provider) {
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return Convert.ToInt16(m_value);
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}
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/// <internalonly/>
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ushort IConvertible.ToUInt16(IFormatProvider provider) {
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return Convert.ToUInt16(m_value);
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}
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/// <internalonly/>
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int IConvertible.ToInt32(IFormatProvider provider) {
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return m_value;
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}
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/// <internalonly/>
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uint IConvertible.ToUInt32(IFormatProvider provider) {
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return Convert.ToUInt32(m_value);
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}
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/// <internalonly/>
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long IConvertible.ToInt64(IFormatProvider provider) {
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return Convert.ToInt64(m_value);
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}
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/// <internalonly/>
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ulong IConvertible.ToUInt64(IFormatProvider provider) {
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return Convert.ToUInt64(m_value);
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}
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/// <internalonly/>
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float IConvertible.ToSingle(IFormatProvider provider) {
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return Convert.ToSingle(m_value);
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}
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/// <internalonly/>
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double IConvertible.ToDouble(IFormatProvider provider) {
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return Convert.ToDouble(m_value);
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}
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/// <internalonly/>
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Decimal IConvertible.ToDecimal(IFormatProvider provider) {
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return Convert.ToDecimal(m_value);
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}
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/// <internalonly/>
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DateTime IConvertible.ToDateTime(IFormatProvider provider) {
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throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "SByte", "DateTime"));
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}
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/// <internalonly/>
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Object IConvertible.ToType(Type type, IFormatProvider provider) {
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return Convert.DefaultToType((IConvertible)this, type, provider);
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}
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///#if GENERICS_WORK
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/// //
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/// // IArithmetic<SByte> implementation
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/// //
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.AbsoluteValue(out bool overflowed) {
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/// overflowed = (m_value == MinValue); // -m_value overflows
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/// return (SByte) (m_value < 0 ? -m_value : m_value);
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Negate(out bool overflowed) {
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/// overflowed = (m_value == MinValue); // Negate(MinValue) overflows
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/// return (SByte) (-m_value);
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Sign(out bool overflowed) {
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/// overflowed = false;
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/// return (SByte) (m_value >= 0 ? (m_value == 0 ? 0 : 1) : -1);
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Add(SByte addend, out bool overflowed) {
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/// int i = ((int)m_value) + addend;
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/// overflowed = (i > MaxValue || i < MinValue);
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/// return (SByte) i;
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Subtract(SByte subtrahend, out bool overflowed) {
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/// int i = ((int)m_value) - subtrahend;
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/// overflowed = (i > MaxValue || i < MinValue);
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/// return (SByte) i;
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Multiply(SByte multiplier, out bool overflowed) {
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/// int i = ((int)m_value) * multiplier;
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/// overflowed = (i > MaxValue || i < MinValue);
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/// return (SByte) i;
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/// }
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///
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Divide(SByte divisor, out bool overflowed) {
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/// // signed integer division can overflow. Consider the following
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/// // 8-bit case: -128/-1 = 128.
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/// // 128 won't fit into a signed 8-bit integer, instead you will end up
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/// // with -128.
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/// //
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/// // Because of this corner case, we must check if the numerator
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/// // is MinValue and if the denominator is -1.
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///
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/// overflowed = (divisor == -1 && m_value == MinValue);
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/// return (SByte) unchecked(m_value / divisor);
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.DivideRemainder(SByte divisor, out SByte remainder, out bool overflowed) {
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/// remainder = (SByte) (m_value % divisor);
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/// overflowed = (divisor == -1 && m_value == MinValue);
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/// return (SByte) unchecked(m_value / divisor);
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/// }
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///
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/// /// <internalonly/>
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/// SByte IArithmetic<SByte>.Remainder(SByte divisor, out bool overflowed) {
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/// overflowed = false;
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/// return (SByte) (m_value % divisor);
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/// }
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///
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/// /// <internalonly/>
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/// ArithmeticDescriptor<SByte> IArithmetic<SByte>.GetDescriptor() {
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/// if (s_descriptor == null) {
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/// s_descriptor = new SByteArithmeticDescriptor( ArithmeticCapabilities.One
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/// | ArithmeticCapabilities.Zero
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/// | ArithmeticCapabilities.MaxValue
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/// | ArithmeticCapabilities.MinValue);
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/// }
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/// return s_descriptor;
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/// }
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///
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/// private static SByteArithmeticDescriptor s_descriptor;
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///
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/// class SByteArithmeticDescriptor : ArithmeticDescriptor<SByte> {
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/// public SByteArithmeticDescriptor(ArithmeticCapabilities capabilities) : base(capabilities) {}
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///
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/// public override SByte One {
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/// get {
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/// return (SByte) 1;
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/// }
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/// }
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///
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/// public override SByte Zero {
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/// get {
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/// return (SByte) 0;
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/// }
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/// }
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///
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/// public override SByte MinValue {
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/// get {
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/// return SByte.MinValue;
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/// }
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/// }
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///
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/// public override SByte MaxValue {
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/// get {
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/// return SByte.MaxValue;
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/// }
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/// }
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/// }
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///#endif // #if GENERICS_WORK
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}
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}
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