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Diffstat (limited to 'buildscripts/phing/classes/phing/util/regexp/PregEngine.php')
| -rw-r--r-- | buildscripts/phing/classes/phing/util/regexp/PregEngine.php | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/buildscripts/phing/classes/phing/util/regexp/PregEngine.php b/buildscripts/phing/classes/phing/util/regexp/PregEngine.php new file mode 100644 index 00000000..76cf56b3 --- /dev/null +++ b/buildscripts/phing/classes/phing/util/regexp/PregEngine.php @@ -0,0 +1,167 @@ +<?php +/* + * $Id: 94607411e16d4c9091369ff4a65ea8f44bde8781 $ + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This software consists of voluntary contributions made by many individuals + * and is licensed under the LGPL. For more information please see + * <http://phing.info>. + */ + +require_once 'phing/util/regexp/RegexpEngine.php'; + +/** + * PREG Regexp Engine. + * Implements a regexp engine using PHP's preg_match(), preg_match_all(), and preg_replace() functions. + * + * @author hans lellelid, hans@velum.net + * @package phing.util.regexp + */ +class PregEngine implements RegexpEngine { + + /** + * Set to null by default to distinguish between false and not set + * @var boolean + */ + private $ignoreCase = null; + + /** + * Set to null by default to distinguish between false and not set + * @var boolean + */ + private $multiline = null; + + /** + * Pattern modifiers + * @link http://php.net/manual/en/reference.pcre.pattern.modifiers.php + * @var string + */ + private $modifiers = null; + + /** + * Sets pattern modifiers for regex engine + * + * @param string $mods Modifiers to be applied to a given regex + * @return void + */ + public function setModifiers($mods) { + $this->modifiers = (string)$mods; + } + + /** + * Gets pattern modifiers. + * @return string + */ + public function getModifiers() { + $mods = $this->modifiers; + if($this->getIgnoreCase()) { + $mods .= 'i'; + } elseif($this->getIgnoreCase() === false) { + $mods = str_replace('i', '', $mods); + } + if($this->getMultiline()) { + $mods .= 's'; + } elseif($this->getMultiline() === false) { + $mods = str_replace('s', '', $mods); + } + // filter out duplicates + $mods = preg_split('//', $mods, -1, PREG_SPLIT_NO_EMPTY); + $mods = implode('', array_unique($mods)); + return $mods; + } + + /** + * Sets whether or not regex operation is case sensitive. + * @param boolean $bit + * @return void + */ + function setIgnoreCase($bit) { + $this->ignoreCase = (boolean) $bit; + } + + /** + * Gets whether or not regex operation is case sensitive. + * @return boolean + */ + function getIgnoreCase() { + return $this->ignoreCase; + } + + /** + * Sets whether regexp should be applied in multiline mode. + * @param boolean $bit + */ + function setMultiline($bit) { + $this->multiline = $bit; + } + + /** + * Gets whether regexp is to be applied in multiline mode. + * @return boolean + */ + function getMultiline() { + return $this->multiline; + } + + /** + * The pattern needs to be converted into PREG style -- which includes adding expression delims & any flags, etc. + * @param string $pattern + * @return string prepared pattern. + */ + private function preparePattern($pattern) + { + // Use backquotes since hardly ever found in a regexp pattern, avoids using preg_quote + return '`'.$pattern.'`' . $this->getModifiers(); + } + + /** + * Matches pattern against source string and sets the matches array. + * @param string $pattern The regex pattern to match. + * @param string $source The source string. + * @param array $matches The array in which to store matches. + * @return boolean Success of matching operation. + */ + function match($pattern, $source, &$matches) { + return preg_match($this->preparePattern($pattern), $source, $matches); + } + + /** + * Matches all patterns in source string and sets the matches array. + * @param string $pattern The regex pattern to match. + * @param string $source The source string. + * @param array $matches The array in which to store matches. + * @return boolean Success of matching operation. + */ + function matchAll($pattern, $source, &$matches) { + return preg_match_all($this->preparePattern($pattern), $source, $matches); + } + + /** + * Replaces $pattern with $replace in $source string. + * References to \1 group matches will be replaced with more preg-friendly + * $1. + * @param string $pattern The regex pattern to match. + * @param string $replace The string with which to replace matches. + * @param string $source The source string. + * @return string The replaced source string. + */ + function replace($pattern, $replace, $source) { + // convert \1 -> $1, because we want to use the more generic \1 in the XML + // but PREG prefers $1 syntax. + $replace = preg_replace('/\\\(\d+)/', '\$$1', $replace); + return preg_replace($this->preparePattern($pattern), $replace, $source); + } + +} + |