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62 lines
2.4 KiB
PHP
62 lines
2.4 KiB
PHP
<?php
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/* Copyright (c) 2019 Geert Bergman (geert@scrivo.nl), highlight.php
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of "highlight.js", "highlight.php", nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Highlight;
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/**
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* @internal
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*
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* @since 9.16.0.0
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*/
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abstract class RegExUtils
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{
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/**
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* @param string $value
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* @param bool $global
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* @param bool $case_insensitive
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*
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* @return RegEx
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*/
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public static function langRe($value, $global, $case_insensitive)
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{
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// PCRE allows us to change the definition of "new line." The
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// `(*ANYCRLF)` matches `\r`, `\n`, and `\r\n` for `$`
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//
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// https://www.pcre.org/original/doc/html/pcrepattern.html
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// PCRE requires us to tell it the string can be UTF-8, so the 'u' modifier
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// is required. The `u` flag for PCRE is different from JS' unicode flag.
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$escaped = preg_replace('#(?<!\\\)/#um', '\\/', $value);
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$regex = "/(*ANYCRLF){$escaped}/um" . ($case_insensitive ? "i" : "");
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return new RegEx($regex);
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}
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}
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