1 | #Region "Microsoft.VisualBasic::cc5a4e52f76acf996fd2dfbc29168ecd, Microsoft.VisualBasic.Core\Text\Patterns\Wildcards.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 WildcardsExtension |
35 | ' |
36 | ' Function: (+2 Overloads) WildcardMatch |
37 | ' |
38 | ' |
39 | ' /********************************************************************************/ |
40 | |
41 | #End Region |
42 | |
43 | Imports System.Runtime.CompilerServices |
44 | |
45 | Namespace Text.Patterns |
46 | |
47 | ''' <summary> |
48 | ''' Extensions to <see cref="String"/> by using wildcards to match string |
49 | ''' |
50 | ''' ###### A very simple wildcard match |
51 | ''' > https://github.com/picrap/WildcardMatch |
52 | ''' </summary> |
53 | Public Module WildcardsExtension |
54 | |
55 | ''' <summary> |
56 | ''' Tells if the given string matches the given wildcard. |
57 | ''' Two wildcards are allowed: ``*`` and ``%``. |
58 | ''' |
59 | ''' + '*' matches any ZERO or more characters |
60 | ''' + '%' matches any single character |
61 | ''' </summary> |
62 | ''' <param name="wildcard">The wildcard.</param> |
63 | ''' <param name="s">The s.</param> |
64 | ''' <param name="ignoreCase">if set to <c>true</c> [ignore case].</param> |
65 | ''' <returns></returns> |
66 | ''' |
67 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
68 | <Extension> |
69 | Public Function WildcardMatch(wildcard$, s$, Optional ignoreCase As Boolean = False) As Boolean |
70 | Return WildcardMatch(wildcard, s, 0, 0, ignoreCase) |
71 | End Function |
72 | |
73 | Const NeverRun$ = "This code is never run, so this exception is useless." |
74 | |
75 | ''' <summary> |
76 | ''' Internal matching algorithm. |
77 | ''' </summary> |
78 | ''' <param name="wildcard">The wildcard.</param> |
79 | ''' <param name="s">The s.</param> |
80 | ''' <param name="wildcardIndex">Index of the wildcard.</param> |
81 | ''' <param name="sIndex">Index of the s.</param> |
82 | ''' <param name="ignoreCase">if set to <c>true</c> [ignore case].</param> |
83 | ''' <returns></returns> |
84 | <Extension> |
85 | Private Function WildcardMatch(wildcard$, s$, wildcardIndex%, sIndex%, ignoreCase As Boolean) As Boolean |
86 | Do While True |
87 | ' in the wildcard end, if we are at tested string end, then strings match |
88 | If wildcardIndex = wildcard.Length Then |
89 | Return sIndex = s.Length |
90 | End If |
91 | |
92 | Dim c As Char = wildcard(wildcardIndex) |
93 | |
94 | Select Case c |
95 | |
96 | ' always a match |
97 | Case "%"c |
98 | Case "*"c |
99 | |
100 | ' if this is the last wildcard char, then we have a match, whatever the tested string is |
101 | If wildcardIndex = wildcard.Length - 1 Then |
102 | Return True |
103 | End If |
104 | |
105 | ' test if a match follows |
106 | Return Enumerable _ |
107 | .Range(sIndex, s.Length - 1) _ |
108 | .Any(Function(i) |
109 | Return WildcardMatch(wildcard, s, wildcardIndex + 1, i, ignoreCase) |
110 | End Function) |
111 | Case Else |
112 | If sIndex < s.Length Then |
113 | Dim cc = If(ignoreCase, Char.ToLower(c), c) |
114 | Dim sc = If(ignoreCase, Char.ToLower(s(sIndex)), s(sIndex)) |
115 | |
116 | If cc <> sc Then |
117 | Return False |
118 | End If |
119 | End If |
120 | End Select |
121 | |
122 | wildcardIndex += 1 |
123 | sIndex += 1 |
124 | Loop |
125 | |
126 | ' disable the warning for function no returns value. |
127 | Throw New Exception(NeverRun) |
128 | End Function |
129 | End Module |
130 | End Namespace |