1 | #Region "Microsoft.VisualBasic::3d26d206d1d8d8bde42c0d0935273ff8, Microsoft.VisualBasic.Core\Extensions\Math\Information\UncheckHelpers.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Module UncheckHelpers |
35 | ' |
36 | ' Function: ToTruncateInt32, ToTruncateInt64 |
37 | ' |
38 | ' |
39 | ' /********************************************************************************/ |
40 | |
41 | #End Region |
42 | |
43 | Imports System.Numerics |
44 | Imports System.Runtime.CompilerServices |
45 | Imports System.Runtime.InteropServices |
46 | Imports Microsoft.VisualBasic.Language |
47 | |
48 | Namespace Math.Information |
49 | |
50 | Public Module UncheckHelpers |
51 | |
52 | ReadOnly sizeOfInt64% = Marshal.SizeOf(Long.MaxValue) |
53 | ReadOnly sizeOfInt32% = Marshal.SizeOf(Integer.MaxValue) |
54 | |
55 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
56 | <Extension> |
57 | Public Function ToTruncateInt64(bi As BigInteger) As Long |
58 | With bi.ToByteArray |
59 | If .Length < sizeOfInt64 Then |
60 | Return CType(bi, Long) |
61 | Else |
62 | Return BitConverter.ToInt64(.ByRef, Scan0) |
63 | End If |
64 | End With |
65 | End Function |
66 | |
67 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
68 | <Extension> |
69 | Public Function ToTruncateInt32(bi As BigInteger) As Integer |
70 | With bi.ToByteArray |
71 | If .Length < sizeOfInt32 Then |
72 | Return CType(bi, Long) |
73 | Else |
74 | Return BitConverter.ToInt32(.ByRef, Scan0) |
75 | End If |
76 | End With |
77 | End Function |
78 | End Module |
79 | End Namespace |