BitConverter.DoubleToInt64Bits(Double) Method
Definition
Important
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Converts the specified double-precision floating point number to a 64-bit signed integer.
public:
static long DoubleToInt64Bits(double value);public static long DoubleToInt64Bits(double value);static member DoubleToInt64Bits : double -> int64Public Shared Function DoubleToInt64Bits (value As Double) As LongParameters
- value
- Double
The number to convert.
Returns
A 64-bit signed integer whose value is equivalent to value.
Examples
The following code example converts the bit patterns of several Double values to Int64 values with the DoubleToInt64Bits method.
// 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
Remarks
The order of bits in the integer returned by the DoubleToInt64Bits method depends on whether the computer architecture is little-endian or big-endian.
