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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Int64.cs
**
**
** Purpose: This class will encapsulate a long and provide an
** Object representation of it.
**
**
===========================================================*/
namespace System {
using System;
using System.Globalization;
///#if GENERICS_WORK
/// using System.Numerics;
///#endif
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 Int64 : IComparable, IFormattable, IConvertible
, IComparable<Int64>, IEquatable<Int64>
/// , IArithmetic<Int64>
#else
public struct Int64 : IComparable, IFormattable, IConvertible
#endif
{
internal long m_value;
public const long MaxValue = 0x7fffffffffffffffL;
public const long MinValue = unchecked((long)0x8000000000000000L);
// 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 Int64, this method throws an ArgumentException.
//
public int CompareTo(Object value) {
if (value == null) {
return 1;
}
if (value is Int64) {
// Need to use compare because subtraction will wrap
// to positive for very large neg numbers, etc.
long i = (long)value;
if (m_value < i) return -1;
if (m_value > i) return 1;
return 0;
}
throw new ArgumentException (Environment.GetResourceString("Arg_MustBeInt64"));
}
public int CompareTo(Int64 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 Int64)) {
return false;
}
return m_value == ((Int64)obj).m_value;
}
[System.Runtime.Versioning.NonVersionable]
public bool Equals(Int64 obj)
{
return m_value == obj;
}
// The value of the lower 32 bits XORed with the uppper 32 bits.
public override int GetHashCode() {
return (unchecked((int)((long)m_value)) ^ (int)(m_value >> 32));
}
[System.Security.SecuritySafeCritical] // auto-generated
public override String ToString() {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt64(m_value, null, NumberFormatInfo.CurrentInfo);
}
[System.Security.SecuritySafeCritical] // auto-generated
public String ToString(IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt64(m_value, null, NumberFormatInfo.GetInstance(provider));
}
[System.Security.SecuritySafeCritical] // auto-generated
public String ToString(String format) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt64(m_value, format, NumberFormatInfo.CurrentInfo);
}
[System.Security.SecuritySafeCritical] // auto-generated
public String ToString(String format, IFormatProvider provider) {
Contract.Ensures(Contract.Result<String>() != null);
return Number.FormatInt64(m_value, format, NumberFormatInfo.GetInstance(provider));
}
public static long Parse(String s) {
return Number.ParseInt64(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo);
}
public static long Parse(String s, NumberStyles style) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.ParseInt64(s, style, NumberFormatInfo.CurrentInfo);
}
public static long Parse(String s, IFormatProvider provider) {
return Number.ParseInt64(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
}
// Parses a long from a String in the given style. If
// a NumberFormatInfo isn't specified, the current culture's
// NumberFormatInfo is assumed.
//
public static long Parse(String s, NumberStyles style, IFormatProvider provider) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.ParseInt64(s, style, NumberFormatInfo.GetInstance(provider));
}
public static Boolean TryParse(String s, out Int64 result) {
return Number.TryParseInt64(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
}
public static Boolean TryParse(String s, NumberStyles style, IFormatProvider provider, out Int64 result) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Number.TryParseInt64(s, style, NumberFormatInfo.GetInstance(provider), out result);
}
//
// IConvertible implementation
//
public TypeCode GetTypeCode() {
return TypeCode.Int64;
}
/// <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 Convert.ToInt32(m_value);
}
/// <internalonly/>
uint IConvertible.ToUInt32(IFormatProvider provider) {
return Convert.ToUInt32(m_value);
}
/// <internalonly/>
long IConvertible.ToInt64(IFormatProvider provider) {
return 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", "Int64", "DateTime"));
}
/// <internalonly/>
Object IConvertible.ToType(Type type, IFormatProvider provider) {
return Convert.DefaultToType((IConvertible)this, type, provider);
}
///#if GENERICS_WORK
/// //
/// // IArithmetic<Int64> implementation
/// //
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.AbsoluteValue(out bool overflowed) {
/// overflowed = (m_value == MinValue); // -m_value overflows
/// return (m_value < 0 ? -m_value : m_value);
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Negate(out bool overflowed) {
/// overflowed = (m_value == MinValue); // Negate(MinValue) overflows
/// return (-m_value);
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Sign(out bool overflowed) {
/// overflowed = false;
/// return (m_value >= 0 ? (m_value == 0 ? 0 : 1) : -1);
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Add(Int64 addend, out bool overflowed) {
/// //
/// // true arithmetic range check => re-written for signed int
/// // ------------------------------- -------------------------------
/// // ( ((m_value + addend) > MaxValue) => ( (addend > 0 && m_value > MaxValue - addend)
/// // ||((m_value + addend) < MinValue)) ||(addend < 0 && m_value < MinValue - addend) )
///
///
/// overflowed = ((addend > 0) && (m_value > (MaxValue - addend))) ||
/// ((addend < 0) && (m_value < (MinValue - addend)));
/// return unchecked(m_value + addend);
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Subtract(Int64 subtrahend, out bool overflowed) {
/// //
/// // true arithmetic range check => re-written for signed int
/// // ------------------------------- -------------------------------
/// // ( ((m_value - subtrahend) > MaxValue) => ( (subtrahend < 0 && m_value > MaxValue + subtrahend)
/// // ||((m_value - subtrahend) < MinValue)) ||(subtrahend > 0 && m_value < MinValue + subtrahend) )
///
/// overflowed = ((subtrahend < 0) && (m_value > (MaxValue + subtrahend))) ||
/// ((subtrahend > 0) && (m_value < (MinValue + subtrahend)));
/// return unchecked(m_value - subtrahend);
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Multiply(Int64 multiplier, out bool overflowed) {
/// overflowed = Int64MultiplyOverflowed(m_value, multiplier);
/// return unchecked(m_value * multiplier);
/// }
///
/// //
/// // Please refer to VM\jithelpers.cpp JIT_LMulOvf for more detailed information
/// //
/// // We perform this overflow check here instead of simply using a 'checked' operation
/// // as it is roughly 1,345X faster.
/// //
/// static Boolean Int64MultiplyOverflowed(Int64 val1, Int64 val2) {
/// Int64 ret;
///
/// // Remember the sign of the result
/// Int32 sign = (Int32) (Hi32Bits(val1) ^ Hi32Bits(val2));
///
/// // Convert to unsigned multiplication
/// if (val1 < 0) val1 = -val1;
/// if (val2 < 0) val2 = -val2;
///
/// // Get the upper 32 bits of the numbers
/// UInt32 val1High = Hi32Bits(val1);
/// UInt32 val2High = Hi32Bits(val2);
///
/// UInt64 valMid;
///
/// if (val1High == 0) {
/// // Compute the 'middle' bits of the long multiplication
/// valMid = Mul32x32To64(val2High, (UInt32)val1);
/// }
/// else {
/// if (val2High != 0)
/// return true;
/// // Compute the 'middle' bits of the long multiplication
/// valMid = Mul32x32To64(val1High, (UInt32)val2);
/// }
///
/// // See if any bits after bit 32 are set
/// if (Hi32Bits((Int64)valMid) != 0)
/// return true;
///
/// ret = (Int64) (Mul32x32To64((UInt32)val1, (UInt32)val2) + (valMid << 32));
///
/// // check for overflow
/// if (Hi32Bits(ret) < (UInt32)valMid)
/// return true;
///
/// if (sign >= 0) {
/// // have we spilled into the sign bit?
/// if (ret < 0)
/// return true;
/// }
/// else {
/// ret = -ret;
/// // have we spilled into the sign bit?
/// if (ret > 0)
/// return true;
/// }
/// return false;
/// }
///
/// //
/// // helper method to get high 32-bit of 64-bit int
/// //
/// static UInt32 Hi32Bits(Int64 x) {
/// return ((UInt32)((UInt64)(x) >> 32));
/// }
///
/// //
/// // helper method to multiply two 32-bit uints
/// //
/// static UInt64 Mul32x32To64(UInt32 x, UInt32 y) {
/// return ((UInt64)(x) * (UInt64)(y));
/// }
///
/// /// <internalonly/>
/// Int64 IArithmetic<Int64>.Divide(Int64 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/>
/// Int64 IArithmetic<Int64>.DivideRemainder(Int64 divisor, out Int64 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/>
/// Int64 IArithmetic<Int64>.Remainder(Int64 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<Int64> IArithmetic<Int64>.GetDescriptor() {
/// if (s_descriptor == null) {
/// s_descriptor = new Int64ArithmeticDescriptor( ArithmeticCapabilities.One
/// | ArithmeticCapabilities.Zero
/// | ArithmeticCapabilities.MaxValue
/// | ArithmeticCapabilities.MinValue);
/// }
/// return s_descriptor;
/// }
///
/// private static Int64ArithmeticDescriptor s_descriptor;
///
/// class Int64ArithmeticDescriptor : ArithmeticDescriptor<Int64> {
/// public Int64ArithmeticDescriptor(ArithmeticCapabilities capabilities) : base(capabilities) {}
///
/// public override Int64 One {
/// get {
/// return (Int64) 1;
/// }
/// }
///
/// public override Int64 Zero {
/// get {
/// return (Int64) 0;
/// }
/// }
///
/// public override Int64 MinValue {
/// get {
/// return Int64.MinValue;
/// }
/// }
///
/// public override Int64 MaxValue {
/// get {
/// return Int64.MaxValue;
/// }
/// }
/// }
///#endif // #if GENERICS_WORK
}
}