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