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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Int32
**
**
** Purpose: A representation of a 32 bit 2's complement
** integer.
**
**
===========================================================*/
namespace System {
using System;
using System.Globalization;
///#if GENERICS_WORK
/// using System.Numerics;
///#endif
using System.Runtime;
using System.Runtime.InteropServices;
using System.Diagnostics.Contracts;
[Serializable]
[System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
[System.Runtime.InteropServices.ComVisible(true)]
#if GENERICS_WORK
public struct Int32 : IComparable, IFormattable, IConvertible
, IComparable<Int32>, IEquatable<Int32>
/// , IArithmetic<Int32>
#else
public struct Int32 : IComparable, IFormattable, IConvertible
#endif
{
internal int m_value;
public const int MaxValue = 0x7fffffff;
public const int MinValue = unchecked((int)0x80000000);
// 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 Int32, this method throws an ArgumentException.
//
public int CompareTo(Object value) {
if (value == null) {
return 1;
}
if (value is Int32) {
// Need to use compare because subtraction will wrap
// to positive for very large neg numbers, etc.
int i = (int)value;
if (m_value < i) return -1;
if (m_value > i) return 1;
return 0;
}
throw new ArgumentException (Environment.GetResourceString("Arg_MustBeInt32"));
}
public int CompareTo(int value) {
// Need to use compare because subtraction will wrap
// to positive for very large neg numbers, etc.
if (m_value < value) return -1;
if (m_value > value) return 1;
return 0;
}
public override bool Equals(Object obj) {
if (!(obj is Int32)) {
return false;
}
return m_value == ((Int32)obj).m_value;
}
[System.Runtime.Versioning.NonVersionable]
public bool Equals(Int32 obj)
{
return m_value == obj;
}
// The absolute value of the int contained.
public override int GetHashCode() {
return m_value;
}
[System.Security.SecuritySafeCritical] // auto-generated
[Pure]
public override String ToString() {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo);
}
[System.Security.SecuritySafeCritical] // auto-generated
[Pure]
public String ToString(String format) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, format, NumberFormatInfo.CurrentInfo);
}
[System.Security.SecuritySafeCritical] // auto-generated
[Pure]
public String ToString(IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider));
}
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
public String ToString(String format, IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt32(m_value, format, NumberFormatInfo.GetInstance(provider));
}
[Pure]
public static int Parse(String s) {
return Number.ParseInt32(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo);
}
[Pure]
public static int Parse(String s, NumberStyles style) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.ParseInt32(s, style, NumberFormatInfo.CurrentInfo);
}
// Parses an integer from a String in the given style. If
// a NumberFormatInfo isn't specified, the current culture's
// NumberFormatInfo is assumed.
//
[Pure]
public static int Parse(String s, IFormatProvider provider) {
return Number.ParseInt32(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
}
// Parses an integer from a String in the given style. If
// a NumberFormatInfo isn't specified, the current culture's
// NumberFormatInfo is assumed.
//
[Pure]
public static int Parse(String s, NumberStyles style, IFormatProvider provider) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.ParseInt32(s, style, NumberFormatInfo.GetInstance(provider));
}
// Parses an integer from a String. Returns false rather
// than throwing exceptin if input is invalid
//
[Pure]
public static bool TryParse(String s, out Int32 result) {
return Number.TryParseInt32(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
}
// Parses an integer from a String in the given style. Returns false rather
// than throwing exceptin if input is invalid
//
[Pure]
public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out Int32 result) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.TryParseInt32(s, style, NumberFormatInfo.GetInstance(provider), out result);
}
//
// IConvertible implementation
//
[Pure]
public TypeCode GetTypeCode() {
return TypeCode.Int32;
}
/// <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 Convert.ToSByte(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", "Int32", "DateTime"));
}
/// <internalonly/>
Object IConvertible.ToType(Type type, IFormatProvider provider) {
return Convert.DefaultToType((IConvertible)this, type, provider);
}
///#if GENERICS_WORK
/// //
/// // IArithmetic<Int32> implementation
/// //
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.AbsoluteValue(out bool overflowed) {
/// overflowed = (m_value == MinValue); // -m_value overflows
/// return (Int32) (m_value < 0 ? -m_value : m_value);
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Negate(out bool overflowed) {
/// overflowed = (m_value == MinValue); // Negate(MinValue) overflows
/// return (Int32) (-m_value);
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Sign(out bool overflowed) {
/// overflowed = false;
/// return (m_value >= 0 ? (m_value == 0 ? 0 : 1) : -1);
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Add(Int32 addend, out bool overflowed) {
/// long l = ((long)m_value) + addend;
/// overflowed = (l > MaxValue || l < MinValue);
/// return (Int32) l;
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Subtract(Int32 subtrahend, out bool overflowed) {
/// long l = ((long)m_value) - subtrahend;
/// overflowed = (l > MaxValue || l < MinValue);
/// return (Int32) l;
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Multiply(Int32 multiplier, out bool overflowed) {
/// long l = ((long)m_value) * multiplier;
/// overflowed = (l > MaxValue || l < MinValue);
/// return (Int32) l;
/// }
///
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Divide(Int32 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);
///
/// if (overflowed) {
/// // we special case (MinValue / (-1)) for Int32 and Int64 as
/// // unchecked still throws OverflowException when variables
/// // are used instead of constants
/// return MinValue;
/// }
/// else {
/// return unchecked(m_value / divisor);
/// }
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.DivideRemainder(Int32 divisor, out Int32 remainder, out bool overflowed) {
/// overflowed = (divisor == -1 && m_value == MinValue);
///
/// if (overflowed) {
/// // we special case (MinValue / (-1)) for Int32 and Int64 as
/// // unchecked still throws OverflowException when variables
/// // are used instead of constants
/// remainder = 0;
/// return MinValue;
/// }
/// else {
/// remainder = (m_value % divisor);
/// return unchecked(m_value / divisor);
/// }
/// }
///
/// /// <internalonly/>
/// Int32 IArithmetic<Int32>.Remainder(Int32 divisor, out bool overflowed) {
/// overflowed = false;
///
/// if (divisor == -1 && m_value == MinValue) {
/// // we special case (MinValue % (-1)) for Int32 and Int64 as
/// // unchecked still throws OverflowException when variables
/// // are used instead of constants
/// return 0;
/// }
/// else {
/// return (m_value % divisor);
/// }
/// }
///
/// /// <internalonly/>
/// ArithmeticDescriptor<Int32> IArithmetic<Int32>.GetDescriptor() {
/// if (s_descriptor == null) {
/// s_descriptor = new Int32ArithmeticDescriptor( ArithmeticCapabilities.One
/// | ArithmeticCapabilities.Zero
/// | ArithmeticCapabilities.MaxValue
/// | ArithmeticCapabilities.MinValue);
/// }
/// return s_descriptor;
/// }
///
/// private static Int32ArithmeticDescriptor s_descriptor;
///
/// class Int32ArithmeticDescriptor : ArithmeticDescriptor<Int32> {
/// public Int32ArithmeticDescriptor(ArithmeticCapabilities capabilities) : base(capabilities) {}
///
/// public override Int32 One {
/// get {
/// return (Int32) 1;
/// }
/// }
///
/// public override Int32 Zero {
/// get {
/// return (Int32) 0;
/// }
/// }
///
/// public override Int32 MinValue {
/// get {
/// return Int32.MinValue;
/// }
/// }
///
/// public override Int32 MaxValue {
/// get {
/// return Int32.MaxValue;
/// }
/// }
/// }
///#endif // #if GENERICS_WORK
}
}
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