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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: SByte
**
**
** Purpose:
**
**
===========================================================*/
namespace System {
using System.Globalization;
using System;
///#if GENERICS_WORK
/// using System.Numerics;
///#endif
using System.Runtime.InteropServices;
using System.Diagnostics.Contracts;
// A place holder class for signed bytes.
[Serializable]
[CLSCompliant(false), System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
[System.Runtime.InteropServices.ComVisible(true)]
#if GENERICS_WORK
public struct SByte : IComparable, IFormattable, IConvertible
, IComparable<SByte>, IEquatable<SByte>
/// , IArithmetic<SByte>
#else
public struct SByte : IComparable, IFormattable, IConvertible
#endif
{
private sbyte m_value;
// The maximum value that a Byte may represent: 127.
public const sbyte MaxValue = (sbyte)0x7F;
// The minimum value that a Byte may represent: -128.
public const sbyte MinValue = unchecked((sbyte)0x80);
// Compares this object to another object, returning an integer that
// indicates the relationship.
// Returns a value less than zero if this object
// null is considered to be less than any instance.
// If object is not of type SByte, this method throws an ArgumentException.
//
public int CompareTo(Object obj) {
if (obj == null) {
return 1;
}
if (!(obj is SByte)) {
throw new ArgumentException (Environment.GetResourceString("Arg_MustBeSByte"));
}
return m_value - ((SByte)obj).m_value;
}
public int CompareTo(SByte value) {
return m_value - value;
}
// Determines whether two Byte objects are equal.
public override bool Equals(Object obj) {
if (!(obj is SByte)) {
return false;
}
return m_value == ((SByte)obj).m_value;
}
[System.Runtime.Versioning.NonVersionable]
public bool Equals(SByte obj)
{
return m_value == obj;
}
// Gets a hash code for this instance.
public override int GetHashCode() {
return ((int)m_value ^ (int)m_value << 8);
}
// Provides a string representation of a byte.
[System.Security.SecuritySafeCritical] // auto-generated
public override String ToString() {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo);
}
[System.Security.SecuritySafeCritical] // auto-generated
public String ToString(IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider));
}
public String ToString(String format) {
Contract.Ensures(Contract.Result<String>() != null);
return ToString(format, NumberFormatInfo.CurrentInfo);
}
public String ToString(String format, IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return ToString(format, NumberFormatInfo.GetInstance(provider));
}
[System.Security.SecuritySafeCritical] // auto-generated
private String ToString(String format, NumberFormatInfo info) {
Contract.Ensures(Contract.Result<String>() != null);
if (m_value<0 && format!=null && format.Length>0 && (format[0]=='X' || format[0]=='x')) {
uint temp = (uint)(m_value & 0x000000FF);
return Number.FormatUInt32(temp, format, info);
}
return Number.FormatInt32(m_value, format, info);
}
[CLSCompliant(false)]
public static sbyte Parse(String s) {
return Parse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo);
}
[CLSCompliant(false)]
public static sbyte Parse(String s, NumberStyles style) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.CurrentInfo);
}
[CLSCompliant(false)]
public static sbyte Parse(String s, IFormatProvider provider) {
return Parse(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
}
// Parses a signed byte from a String in the given style. If
// a NumberFormatInfo isn't specified, the current culture's
// NumberFormatInfo is assumed.
//
[CLSCompliant(false)]
public static sbyte Parse(String s, NumberStyles style, IFormatProvider provider) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.GetInstance(provider));
}
private static sbyte Parse(String s, NumberStyles style, NumberFormatInfo info) {
int i = 0;
try {
i = Number.ParseInt32(s, style, info);
}
catch(OverflowException e) {
throw new OverflowException(Environment.GetResourceString("Overflow_SByte"), e);
}
if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number
if ((i < 0) || i > Byte.MaxValue) {
throw new OverflowException(Environment.GetResourceString("Overflow_SByte"));
}
return (sbyte)i;
}
if (i < MinValue || i > MaxValue) throw new OverflowException(Environment.GetResourceString("Overflow_SByte"));
return (sbyte)i;
}
[CLSCompliant(false)]
public static bool TryParse(String s, out SByte result) {
return TryParse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
}
[CLSCompliant(false)]
public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out SByte result) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
}
private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out SByte result) {
result = 0;
int i;
if (!Number.TryParseInt32(s, style, info, out i)) {
return false;
}
if ((style & NumberStyles.AllowHexSpecifier) != 0) { // We are parsing a hexadecimal number
if ((i < 0) || i > Byte.MaxValue) {
return false;
}
result = (sbyte)i;
return true;
}
if (i < MinValue || i > MaxValue) {
return false;
}
result = (sbyte) i;
return true;
}
//
// IConvertible implementation
//
public TypeCode GetTypeCode() {
return TypeCode.SByte;
}
/// <internalonly/>
bool IConvertible.ToBoolean(IFormatProvider provider) {
return Convert.ToBoolean(m_value);
}
/// <internalonly/>
char IConvertible.ToChar(IFormatProvider provider) {
return Convert.ToChar(m_value);
}
/// <internalonly/>
sbyte IConvertible.ToSByte(IFormatProvider provider) {
return m_value;
}
/// <internalonly/>
byte IConvertible.ToByte(IFormatProvider provider) {
return Convert.ToByte(m_value);
}
/// <internalonly/>
short IConvertible.ToInt16(IFormatProvider provider) {
return Convert.ToInt16(m_value);
}
/// <internalonly/>
ushort IConvertible.ToUInt16(IFormatProvider provider) {
return Convert.ToUInt16(m_value);
}
/// <internalonly/>
int IConvertible.ToInt32(IFormatProvider provider) {
return m_value;
}
/// <internalonly/>
uint IConvertible.ToUInt32(IFormatProvider provider) {
return Convert.ToUInt32(m_value);
}
/// <internalonly/>
long IConvertible.ToInt64(IFormatProvider provider) {
return Convert.ToInt64(m_value);
}
/// <internalonly/>
ulong IConvertible.ToUInt64(IFormatProvider provider) {
return Convert.ToUInt64(m_value);
}
/// <internalonly/>
float IConvertible.ToSingle(IFormatProvider provider) {
return Convert.ToSingle(m_value);
}
/// <internalonly/>
double IConvertible.ToDouble(IFormatProvider provider) {
return Convert.ToDouble(m_value);
}
/// <internalonly/>
Decimal IConvertible.ToDecimal(IFormatProvider provider) {
return Convert.ToDecimal(m_value);
}
/// <internalonly/>
DateTime IConvertible.ToDateTime(IFormatProvider provider) {
throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", "SByte", "DateTime"));
}
/// <internalonly/>
Object IConvertible.ToType(Type type, IFormatProvider provider) {
return Convert.DefaultToType((IConvertible)this, type, provider);
}
///#if GENERICS_WORK
/// //
/// // IArithmetic<SByte> implementation
/// //
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.AbsoluteValue(out bool overflowed) {
/// overflowed = (m_value == MinValue); // -m_value overflows
/// return (SByte) (m_value < 0 ? -m_value : m_value);
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Negate(out bool overflowed) {
/// overflowed = (m_value == MinValue); // Negate(MinValue) overflows
/// return (SByte) (-m_value);
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Sign(out bool overflowed) {
/// overflowed = false;
/// return (SByte) (m_value >= 0 ? (m_value == 0 ? 0 : 1) : -1);
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Add(SByte addend, out bool overflowed) {
/// int i = ((int)m_value) + addend;
/// overflowed = (i > MaxValue || i < MinValue);
/// return (SByte) i;
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Subtract(SByte subtrahend, out bool overflowed) {
/// int i = ((int)m_value) - subtrahend;
/// overflowed = (i > MaxValue || i < MinValue);
/// return (SByte) i;
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Multiply(SByte multiplier, out bool overflowed) {
/// int i = ((int)m_value) * multiplier;
/// overflowed = (i > MaxValue || i < MinValue);
/// return (SByte) i;
/// }
///
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Divide(SByte divisor, out bool overflowed) {
/// // signed integer division can overflow. Consider the following
/// // 8-bit case: -128/-1 = 128.
/// // 128 won't fit into a signed 8-bit integer, instead you will end up
/// // with -128.
/// //
/// // Because of this corner case, we must check if the numerator
/// // is MinValue and if the denominator is -1.
///
/// overflowed = (divisor == -1 && m_value == MinValue);
/// return (SByte) unchecked(m_value / divisor);
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.DivideRemainder(SByte divisor, out SByte remainder, out bool overflowed) {
/// remainder = (SByte) (m_value % divisor);
/// overflowed = (divisor == -1 && m_value == MinValue);
/// return (SByte) unchecked(m_value / divisor);
/// }
///
/// /// <internalonly/>
/// SByte IArithmetic<SByte>.Remainder(SByte divisor, out bool overflowed) {
/// overflowed = false;
/// return (SByte) (m_value % divisor);
/// }
///
/// /// <internalonly/>
/// ArithmeticDescriptor<SByte> IArithmetic<SByte>.GetDescriptor() {
/// if (s_descriptor == null) {
/// s_descriptor = new SByteArithmeticDescriptor( ArithmeticCapabilities.One
/// | ArithmeticCapabilities.Zero
/// | ArithmeticCapabilities.MaxValue
/// | ArithmeticCapabilities.MinValue);
/// }
/// return s_descriptor;
/// }
///
/// private static SByteArithmeticDescriptor s_descriptor;
///
/// class SByteArithmeticDescriptor : ArithmeticDescriptor<SByte> {
/// public SByteArithmeticDescriptor(ArithmeticCapabilities capabilities) : base(capabilities) {}
///
/// public override SByte One {
/// get {
/// return (SByte) 1;
/// }
/// }
///
/// public override SByte Zero {
/// get {
/// return (SByte) 0;
/// }
/// }
///
/// public override SByte MinValue {
/// get {
/// return SByte.MinValue;
/// }
/// }
///
/// public override SByte MaxValue {
/// get {
/// return SByte.MaxValue;
/// }
/// }
/// }
///#endif // #if GENERICS_WORK
}
}
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