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<?php /* * $Id: StripLineComments.php 325 2007-12-20 15:44:58Z hans $ * * 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>. */ include_once 'phing/filters/BaseParamFilterReader.php'; include_once 'phing/filters/ChainableReader.php'; /* * This filter strips line comments. * * Example: * * <pre><striplinecomments> * <comment value="#"/> * <comment value="--"/> * <comment value="REM "/> * <comment value="rem "/> * <comment value="//"/> * </striplinecomments></pre> * * Or: * * <pre><filterreader classname="phing.filters.StripLineComments"> * <param type="comment" value="#"/> * <param type="comment" value="--"/> * <param type="comment" value="REM "/> * <param type="comment" value="rem "/> * <param type="comment" value="//"/> * </filterreader></pre> * * @author <a href="mailto:yl@seasonfive.com">Yannick Lecaillez</a> * @author hans lellelid, hans@velum.net * @version $Revision: 1.8 $ $Date: 2007-12-20 15:44:58 +0000 (Thu, 20 Dec 2007) $ * @access public * @see BaseParamFilterReader * @package phing.filters */ class StripLineComments extends BaseParamFilterReader implements ChainableReader { /** Parameter name for the comment prefix. */ const COMMENTS_KEY = "comment"; /** Array that holds the comment prefixes. */ private $_comments = array(); /** * Returns stream only including * lines from the original stream which don't start with any of the * specified comment prefixes. * * @return mixed the resulting stream, or -1 * if the end of the resulting stream has been reached. * * @throws IOException if the underlying stream throws an IOException * during reading */ function read($len = null) { if ( !$this->getInitialized() ) { $this->_initialize(); $this->setInitialized(true); } $buffer = $this->in->read($len); if ($buffer === -1) { return -1; } $lines = explode("\n", $buffer); $filtered = array(); $commentsSize = count($this->_comments); foreach($lines as $line) { for($i = 0; $i < $commentsSize; $i++) { $comment = $this->_comments[$i]->getValue(); if ( StringHelper::startsWith($comment, ltrim($line)) ) { $line = null; break; } } if ($line !== null) { $filtered[] = $line; } } $filtered_buffer = implode("\n", $filtered); return $filtered_buffer; } /* * Adds a <code>comment</code> element to the list of prefixes. * * @return comment The <code>comment</code> element added to the * list of comment prefixes to strip. */ function createComment() { $num = array_push($this->_comments, new Comment()); return $this->_comments[$num-1]; } /* * Sets the list of comment prefixes to strip. * * @param comments A list of strings, each of which is a prefix * for a comment line. Must not be <code>null</code>. */ function setComments($lineBreaks) { if (!is_array($lineBreaks)) { throw new Exception("Excpected 'array', got something else"); } $this->_comments = $lineBreaks; } /* * Returns the list of comment prefixes to strip. * * @return array The list of comment prefixes to strip. */ function getComments() { return $this->_comments; } /* * Creates a new StripLineComments using the passed in * Reader for instantiation. * * @param reader A Reader object providing the underlying stream. * Must not be <code>null</code>. * * @return a new filter based on this configuration, but filtering * the specified reader */ function chain(Reader $reader) { $newFilter = new StripLineComments($reader); $newFilter->setComments($this->getComments()); $newFilter->setInitialized(true); $newFilter->setProject($this->getProject()); return $newFilter; } /* * Parses the parameters to set the comment prefixes. */ private function _initialize() { $params = $this->getParameters(); if ( $params !== null ) { for($i = 0 ; $i<count($params) ; $i++) { if ( self::COMMENTS_KEY === $params[$i]->getType() ) { $comment = new Comment(); $comment->setValue($params[$i]->getValue()); array_push($this->_comments, $comment); } } } } } /* * The class that holds a comment representation. */ class Comment { /** The prefix for a line comment. */ private $_value; /* * Sets the prefix for this type of line comment. * * @param string $value The prefix for a line comment of this type. * Must not be <code>null</code>. */ function setValue($value) { $this->_value = (string) $value; } /* * Returns the prefix for this type of line comment. * * @return string The prefix for this type of line comment. */ function getValue() { return $this->_value; } }
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