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<pre><a name="line-1"></a><span class='hs-comment'>{- Copyright (C) 2006 John Goerzen <jgoerzen@complete.org>
<a name="line-2"></a>
<a name="line-3"></a>This program is free software; you can redistribute it and/or modify
<a name="line-4"></a>it under the terms of the GNU General Public License as published by
<a name="line-5"></a>the Free Software Foundation; either version 2 of the License, or
<a name="line-6"></a>(at your option) any later version.
<a name="line-7"></a>
<a name="line-8"></a>This program is distributed in the hope that it will be useful,
<a name="line-9"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-10"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-11"></a>GNU General Public License for more details.
<a name="line-12"></a>
<a name="line-13"></a>You should have received a copy of the GNU General Public License
<a name="line-14"></a>along with this program; if not, write to the Free Software
<a name="line-15"></a>Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<a name="line-16"></a>-}</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-comment'>{- |
<a name="line-19"></a> Module : System.Path.WildMatch
<a name="line-20"></a> Copyright : Copyright (C) 2006 John Goerzen
<a name="line-21"></a> License : GNU GPL, version 2 or above
<a name="line-22"></a>
<a name="line-23"></a> Maintainer : John Goerzen <jgoerzen@complete.org>
<a name="line-24"></a> Stability : provisional
<a name="line-25"></a> Portability: portable
<a name="line-26"></a>
<a name="line-27"></a>Matching filenames with wildcards. See also "System.Path.Glob" for
<a name="line-28"></a>support for generating lists of files based on wildcards.
<a name="line-29"></a>
<a name="line-30"></a>Inspired by fnmatch.py, part of the Python standard library.
<a name="line-31"></a>
<a name="line-32"></a>Written by John Goerzen, jgoerzen\@complete.org
<a name="line-33"></a>
<a name="line-34"></a>The input wildcard for functions in this module is expected to be in
<a name="line-35"></a>the standard style of Posix shells.
<a name="line-36"></a>
<a name="line-37"></a>That is:
<a name="line-38"></a>
<a name="line-39"></a>>? matches exactly one character
<a name="line-40"></a>>\* matches zero or more characters
<a name="line-41"></a>>[list] matches any character in list
<a name="line-42"></a>>[!list] matches any character not in the list
<a name="line-43"></a>
<a name="line-44"></a>The returned regular expression will always end in \$ but never begins
<a name="line-45"></a>with ^, making it suitable for appending to the end of paths. If you want to
<a name="line-46"></a>match a given filename directly, you should prepend the ^ character to the
<a name="line-47"></a>returned value from this function.
<a name="line-48"></a>
<a name="line-49"></a>Please note:
<a name="line-50"></a>
<a name="line-51"></a>* Neither the path separator (the slash or backslash) nor the period carry
<a name="line-52"></a>any special meaning for the functions in this module. That is, @*@ will
<a name="line-53"></a>match @\/@ in a filename. If this is not the behavior you want, you probably
<a name="line-54"></a>want "System.Path.Glob" instead of this module.
<a name="line-55"></a>
<a name="line-56"></a>* Unlike the Unix shell, filenames that begin with a period are not ignored
<a name="line-57"></a>by this module. That is, @*.txt@ will match @.test.txt@.
<a name="line-58"></a>
<a name="line-59"></a>* This module does not current permit escaping of special characters.
<a name="line-60"></a>-}</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span><span class='hs-varop'>.</span><span class='hs-conid'>WildMatch</span> <span class='hs-layout'>(</span><span class='hs-comment'>-- * Wildcard matching</span>
<a name="line-63"></a> <span class='hs-varid'>wildCheckCase</span><span class='hs-layout'>,</span>
<a name="line-64"></a> <span class='hs-varid'>wildToRegex</span><span class='hs-layout'>)</span>
<a name="line-65"></a> <span class='hs-keyword'>where</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="wildToRegex"></a><span class='hs-comment'>{- | Convert a wildcard to an (uncompiled) regular expression.
<a name="line-71"></a>
<a name="line-72"></a>-}</span>
<a name="line-73"></a><span class='hs-definition'>wildToRegex</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-74"></a><span class='hs-definition'>wildToRegex</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>i</span> <span class='hs-varop'>++</span> <span class='hs-str'>"$"</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="wildCheckCase"></a><span class='hs-comment'>{- | Check the given name against the given pattern, being case-sensitive.
<a name="line-77"></a>
<a name="line-78"></a>The given pattern is forced to match the given name starting at the beginning.
<a name="line-79"></a> -}</span>
<a name="line-80"></a><span class='hs-definition'>wildCheckCase</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ The wildcard pattern to use as the base</span>
<a name="line-81"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ The filename to check against it</span>
<a name="line-82"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Result</span>
<a name="line-83"></a><span class='hs-definition'>wildCheckCase</span> <span class='hs-varid'>patt</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span>
<a name="line-84"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>matchRegex</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkRegex</span> <span class='hs-varop'>$</span> <span class='hs-str'>"^"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>wildToRegex</span> <span class='hs-varid'>patt</span><span class='hs-layout'>)</span> <span class='hs-varid'>name</span> <span class='hs-keyword'>of</span>
<a name="line-85"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-86"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-87"></a>
<a name="line-88"></a><a name="convwild"></a><span class='hs-comment'>-- This is SO MUCH CLEANER than the python implementation!</span>
<a name="line-89"></a><span class='hs-definition'>convwild</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-90"></a><span class='hs-definition'>convwild</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-91"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-chr'>'*'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>".*"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>xs</span>
<a name="line-92"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-chr'>'?'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>xs</span>
<a name="line-93"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-chr'>'['</span><span class='hs-conop'>:</span><span class='hs-chr'>'!'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"[^"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convpat</span> <span class='hs-varid'>xs</span>
<a name="line-94"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-chr'>'['</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'['</span> <span class='hs-conop'>:</span> <span class='hs-varid'>convpat</span> <span class='hs-varid'>xs</span>
<a name="line-95"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-chr'>'.'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"\\."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>xs</span>
<a name="line-96"></a><span class='hs-definition'>convwild</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>escapeRe</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>xs</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="convpat"></a><span class='hs-definition'>convpat</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-99"></a><span class='hs-definition'>convpat</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\\'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"\\\\"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>convpat</span> <span class='hs-varid'>xs</span>
<a name="line-100"></a><span class='hs-definition'>convpat</span> <span class='hs-layout'>(</span><span class='hs-chr'>']'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>']'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>convwild</span> <span class='hs-varid'>xs</span>
<a name="line-101"></a><span class='hs-definition'>convpat</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>convpat</span> <span class='hs-varid'>xs</span>
<a name="line-102"></a><span class='hs-definition'>convpat</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
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