BitConverter.DoubleToInt64Bits(Double) メソッド

リファレンス

定義

名前空間:: System

アセンブリ:: mscorlib.dll, System.Runtime.Extensions.dll

アセンブリ:: netstandard.dll, System.Runtime.dll

アセンブリ:: System.Runtime.Extensions.dll

アセンブリ:: mscorlib.dll

アセンブリ:: netstandard.dll

ソース:: BitConverter.cs

ソース:: BitConverter.cs

ソース:: BitConverter.cs

重要

一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。

指定した倍精度浮動小数点数を 64 ビット符号付き整数に変換します。

public:
 static long DoubleToInt64Bits(double value);

public static long DoubleToInt64Bits(double value);

static member DoubleToInt64Bits : double -> int64

Public Shared Function DoubleToInt64Bits (value As Double) As Long

パラメーター

value: Double

変換する数値。

戻り値

Int64

value と等価の値を持つ 64 ビット符号付き整数。

例

次のコード例では、メソッドを使用DoubleToInt64Bitsして、複数Doubleの値のビットパターンを値にInt64変換します。

// Example of the BitConverter::DoubleToInt64Bits method.
using namespace System;

// Reinterpret the double argument as an __int64.
void DoubleToLongBits( double argument )
{
   __int64 longValue;
   longValue = BitConverter::DoubleToInt64Bits( argument );
   
   // Display the resulting __int64 in hexadecimal.
   Console::WriteLine( "{0,25:E16}{1,23:X16}", argument, longValue );
}

int main()
{
   Console::WriteLine( "This example of the BitConverter::DoubleToInt64Bits( "
   "double ) \nmethod generates the following output.\n" );
   Console::WriteLine( "{0,25:E16}{1,23:X16}", "double argument", "hexadecimal value" );
   Console::WriteLine( "{0,25:E16}{1,23:X16}", "---------------", "-----------------" );
   
   // Convert double values and display the results.
   DoubleToLongBits( 1.0 );
   DoubleToLongBits( 15.0 );
   DoubleToLongBits( 255.0 );
   DoubleToLongBits( 4294967295.0 );
   DoubleToLongBits( 0.00390625 );
   DoubleToLongBits( 0.00000000023283064365386962890625 );
   DoubleToLongBits( 1.234567890123E-300 );
   DoubleToLongBits( 1.23456789012345E-150 );
   DoubleToLongBits( 1.2345678901234565 );
   DoubleToLongBits( 1.2345678901234567 );
   DoubleToLongBits( 1.2345678901234569 );
   DoubleToLongBits( 1.23456789012345678E+150 );
   DoubleToLongBits( 1.234567890123456789E+300 );
   DoubleToLongBits( Double::MinValue );
   DoubleToLongBits( Double::MaxValue );
   DoubleToLongBits( Double::Epsilon );
   DoubleToLongBits( Double::NaN );
   DoubleToLongBits( Double::NegativeInfinity );
   DoubleToLongBits( Double::PositiveInfinity );
}

/*
This example of the BitConverter::DoubleToInt64Bits( double )
method generates the following output.

          double argument      hexadecimal value
          ---------------      -----------------
  1.0000000000000000E+000       3FF0000000000000
  1.5000000000000000E+001       402E000000000000
  2.5500000000000000E+002       406FE00000000000
  4.2949672950000000E+009       41EFFFFFFFE00000
  3.9062500000000000E-003       3F70000000000000
  2.3283064365386963E-010       3DF0000000000000
  1.2345678901230000E-300       01AA74FE1C1E7E45
  1.2345678901234500E-150       20D02A36586DB4BB
  1.2345678901234565E+000       3FF3C0CA428C59FA
  1.2345678901234567E+000       3FF3C0CA428C59FB
  1.2345678901234569E+000       3FF3C0CA428C59FC
  1.2345678901234569E+150       5F182344CD3CDF9F
  1.2345678901234569E+300       7E3D7EE8BCBBD352
 -1.7976931348623157E+308       FFEFFFFFFFFFFFFF
  1.7976931348623157E+308       7FEFFFFFFFFFFFFF
  4.9406564584124654E-324       0000000000000001
                      NaN       FFF8000000000000
                -Infinity       FFF0000000000000
                 Infinity       7FF0000000000000
*/

// Example of the BitConverter.DoubleToInt64Bits method.
using System;

class DoubleToInt64BitsDemo
{
    const string formatter = "{0,25:E16}{1,23:X16}";

    // Reinterpret the double argument as a long.
    public static void DoubleToLongBits( double argument )
    {
        long longValue;
        longValue = BitConverter.DoubleToInt64Bits( argument );

        // Display the resulting long in hexadecimal.
        Console.WriteLine( formatter, argument, longValue );
    }

    public static void Main( )
    {
        Console.WriteLine(
            "This example of the BitConverter.DoubleToInt64Bits( " +
            "double ) \nmethod generates the following output.\n" );
        Console.WriteLine( formatter, "double argument",
            "hexadecimal value" );
        Console.WriteLine( formatter, "---------------",
            "-----------------" );

        // Convert double values and display the results.
        DoubleToLongBits( 1.0 );
        DoubleToLongBits( 15.0 );
        DoubleToLongBits( 255.0 );
        DoubleToLongBits( 4294967295.0 );
        DoubleToLongBits( 0.00390625 );
        DoubleToLongBits( 0.00000000023283064365386962890625 );
        DoubleToLongBits( 1.234567890123E-300 );
        DoubleToLongBits( 1.23456789012345E-150 );
        DoubleToLongBits( 1.2345678901234565 );
        DoubleToLongBits( 1.2345678901234567 );
        DoubleToLongBits( 1.2345678901234569 );
        DoubleToLongBits( 1.23456789012345678E+150 );
        DoubleToLongBits( 1.234567890123456789E+300 );
        DoubleToLongBits( double.MinValue );
        DoubleToLongBits( double.MaxValue );
        DoubleToLongBits( double.Epsilon );
        DoubleToLongBits( double.NaN );
        DoubleToLongBits( double.NegativeInfinity );
        DoubleToLongBits( double.PositiveInfinity );
    }
}

/*
This example of the BitConverter.DoubleToInt64Bits( double )
method generates the following output.

          double argument      hexadecimal value
          ---------------      -----------------
  1.0000000000000000E+000       3FF0000000000000
  1.5000000000000000E+001       402E000000000000
  2.5500000000000000E+002       406FE00000000000
  4.2949672950000000E+009       41EFFFFFFFE00000
  3.9062500000000000E-003       3F70000000000000
  2.3283064365386963E-010       3DF0000000000000
  1.2345678901230000E-300       01AA74FE1C1E7E45
  1.2345678901234500E-150       20D02A36586DB4BB
  1.2345678901234565E+000       3FF3C0CA428C59FA
  1.2345678901234567E+000       3FF3C0CA428C59FB
  1.2345678901234569E+000       3FF3C0CA428C59FC
  1.2345678901234569E+150       5F182344CD3CDF9F
  1.2345678901234569E+300       7E3D7EE8BCBBD352
 -1.7976931348623157E+308       FFEFFFFFFFFFFFFF
  1.7976931348623157E+308       7FEFFFFFFFFFFFFF
  4.9406564584124654E-324       0000000000000001
                      NaN       FFF8000000000000
                -Infinity       FFF0000000000000
                 Infinity       7FF0000000000000
*/

open System

let print obj1 obj2 = 
    printfn $"{obj1,25:E16}{obj2,23:X16}"

// Reinterpret the double argument as a long.
let doubleToLongBits argument =
    let longValue = BitConverter.DoubleToInt64Bits argument

    // Display the resulting long in hexadecimal.
    print argument longValue

printfn "This example of the BitConverter.DoubleToInt64Bits(Double) \nmethod generates the following output.\n"
print "double argument" "hexadecimal value"
print "---------------" "-----------------"

// Convert double values and display the results.
doubleToLongBits 1.0
doubleToLongBits 15.0
doubleToLongBits 255.0
doubleToLongBits 4294967295.0
doubleToLongBits 0.00390625
doubleToLongBits 0.00000000023283064365386962890625
doubleToLongBits 1.234567890123E-300
doubleToLongBits 1.23456789012345E-150
doubleToLongBits 1.2345678901234565
doubleToLongBits 1.2345678901234567
doubleToLongBits 1.2345678901234569
doubleToLongBits 1.23456789012345678E+150
doubleToLongBits 1.234567890123456789E+300
doubleToLongBits Double.MinValue
doubleToLongBits Double.MaxValue
doubleToLongBits Double.Epsilon
doubleToLongBits Double.NaN
doubleToLongBits Double.NegativeInfinity
doubleToLongBits Double.PositiveInfinity


// This example of the BitConverter.DoubleToInt64Bits( double )
// method generates the following output.

//           double argument      hexadecimal value
//           ---------------      -----------------
//   1.0000000000000000E+000       3FF0000000000000
//   1.5000000000000000E+001       402E000000000000
//   2.5500000000000000E+002       406FE00000000000
//   4.2949672950000000E+009       41EFFFFFFFE00000
//   3.9062500000000000E-003       3F70000000000000
//   2.3283064365386963E-010       3DF0000000000000
//   1.2345678901230000E-300       01AA74FE1C1E7E45
//   1.2345678901234500E-150       20D02A36586DB4BB
//   1.2345678901234565E+000       3FF3C0CA428C59FA
//   1.2345678901234567E+000       3FF3C0CA428C59FB
//   1.2345678901234569E+000       3FF3C0CA428C59FC
//   1.2345678901234569E+150       5F182344CD3CDF9F
//   1.2345678901234569E+300       7E3D7EE8BCBBD352
//  -1.7976931348623157E+308       FFEFFFFFFFFFFFFF
//   1.7976931348623157E+308       7FEFFFFFFFFFFFFF
//   4.9406564584124654E-324       0000000000000001
//                       NaN       FFF8000000000000
//                        -∞       FFF0000000000000
//                         ∞       7FF0000000000000

' Example of the BitConverter.DoubleToInt64Bits method.
Module DoubleToInt64BitsDemo

    Const formatter As String = "{0,25:E16}{1,23:X16}"
 
    ' Reinterpret the Double argument as a Long.
    Sub DoubleToLongBits( argument As Double )

        Dim longValue    As Long
        longValue = BitConverter.DoubleToInt64Bits( argument )

        ' Display the resulting Long in hexadecimal.
        Console.WriteLine( formatter, argument, longValue )
    End Sub 
       
    Sub Main( )

        Console.WriteLine( _
            "This example of the BitConverter.DoubleToInt64Bits( " & _
            "Double ) " & vbCrLf & "method generates the " & _
            "following output." & vbCrLf )
        Console.WriteLine( formatter, "Double argument", _
            "hexadecimal value" )
        Console.WriteLine( formatter, "---------------", _
            "-----------------" )
          
        ' Convert Double values and display the results.
        DoubleToLongBits( 1.0 )
        DoubleToLongBits( 15.0 )
        DoubleToLongBits( 255.0 )
        DoubleToLongBits( 4294967295.0 )
        DoubleToLongBits( 0.00390625 )
        DoubleToLongBits( 0.00000000023283064365386962890625 )
        DoubleToLongBits( 1.234567890123E-300 )
        DoubleToLongBits( 1.23456789012345E-150 )
        DoubleToLongBits( 1.2345678901234565 )
        DoubleToLongBits( 1.2345678901234567 )
        DoubleToLongBits( 1.2345678901234569 )
        DoubleToLongBits( 1.23456789012345678E+150 )
        DoubleToLongBits( 1.234567890123456789E+300 )
        DoubleToLongBits( Double.MinValue )
        DoubleToLongBits( Double.MaxValue )
        DoubleToLongBits( Double.Epsilon )
        DoubleToLongBits( Double.NaN )
        DoubleToLongBits( Double.NegativeInfinity )
        DoubleToLongBits( Double.PositiveInfinity )
    End Sub 
End Module

' This example of the BitConverter.DoubleToInt64Bits( Double )
' method generates the following output.
' 
'           Double argument      hexadecimal value
'           ---------------      -----------------
'   1.0000000000000000E+000       3FF0000000000000
'   1.5000000000000000E+001       402E000000000000
'   2.5500000000000000E+002       406FE00000000000
'   4.2949672950000000E+009       41EFFFFFFFE00000
'   3.9062500000000000E-003       3F70000000000000
'   2.3283064365386963E-010       3DF0000000000000
'   1.2345678901230000E-300       01AA74FE1C1E7E45
'   1.2345678901234500E-150       20D02A36586DB4BB
'   1.2345678901234565E+000       3FF3C0CA428C59FA
'   1.2345678901234567E+000       3FF3C0CA428C59FB
'   1.2345678901234569E+000       3FF3C0CA428C59FC
'   1.2345678901234569E+150       5F182344CD3CDF9F
'   1.2345678901234569E+300       7E3D7EE8BCBBD352
'  -1.7976931348623157E+308       FFEFFFFFFFFFFFFF
'   1.7976931348623157E+308       7FEFFFFFFFFFFFFF
'   4.9406564584124654E-324       0000000000000001
'                       NaN       FFF8000000000000
'                 -Infinity       FFF0000000000000
'                  Infinity       7FF0000000000000

注釈

メソッドによって DoubleToInt64Bits 返される整数内のビットの順序は、コンピューターアーキテクチャがリトルエンディアンかビッグエンディアンかによって異なります。

適用対象

製品	バージョン
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

こちらもご覧ください

Int64BitsToDouble(Int64)

次の方法で共有

BitConverter.DoubleToInt64Bits(Double) メソッド

定義

パラメーター

戻り値

例

注釈

適用対象

こちらもご覧ください

その他のリソース