80 lines
2.6 KiB
VB.net
80 lines
2.6 KiB
VB.net
#Region "Microsoft.VisualBasic::dae89f686d7e481105d44408dc3ba7fc, Microsoft.VisualBasic.Core\Extensions\Math\Information\UncheckHelpers.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module UncheckHelpers
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'
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' Function: ToTruncateInt32, ToTruncateInt64
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Numerics
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Imports System.Runtime.CompilerServices
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Imports System.Runtime.InteropServices
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Imports Microsoft.VisualBasic.Language
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Namespace Math.Information
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Public Module UncheckHelpers
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ReadOnly sizeOfInt64% = Marshal.SizeOf(Long.MaxValue)
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ReadOnly sizeOfInt32% = Marshal.SizeOf(Integer.MaxValue)
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function ToTruncateInt64(bi As BigInteger) As Long
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With bi.ToByteArray
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If .Length < sizeOfInt64 Then
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Return CType(bi, Long)
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Else
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Return BitConverter.ToInt64(.ByRef, Scan0)
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End If
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End With
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function ToTruncateInt32(bi As BigInteger) As Integer
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With bi.ToByteArray
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If .Length < sizeOfInt32 Then
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Return CType(bi, Long)
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Else
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Return BitConverter.ToInt32(.ByRef, Scan0)
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End If
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End With
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End Function
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End Module
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End Namespace
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