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<?php
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/**
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://phing.info>.
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*/
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/**
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* This is a Php comment and string stripper reader that filters
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* those lexical tokens out for purposes of simple Php parsing.
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* (if you have more complex Php parsing needs, use a real lexer).
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* Since this class heavily relies on the single char read function,
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* you are recommended to make it work on top of a buffered reader.
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*
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* @author <a href="mailto:yl@seasonfive.com">Yannick Lecaillez</a>
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* @author hans lellelid, hans@velum.net
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* @see FilterReader
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* @package phing.filters
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*/
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class StripPhpComments extends BaseFilterReader implements ChainableReader
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{
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/**
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* The read-ahead character, used for effectively pushing a single
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* character back. -1 indicates that no character is in the buffer.
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*/
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private $readAheadCh = -1;
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/**
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* Whether or not the parser is currently in the middle of a string
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* literal.
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*
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* @var boolean
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*/
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private $inString = false;
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/**
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* Returns the stream without Php comments.
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*
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* @param int $len
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* @return string the resulting stream, or -1
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* if the end of the resulting stream has been reached
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*/
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public function read($len = null)
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{
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$buffer = $this->in->read($len);
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if ($buffer === -1) {
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return -1;
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}
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1
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$newStr = '';
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$tokens = token_get_all($buffer);
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foreach ($tokens as $token) {
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if (is_array($token)) {
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[$id, $text] = $token;
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switch ($id) {
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case T_COMMENT:
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case T_DOC_COMMENT:
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// no action on comments
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continue 2;
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default:
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$newStr .= $text;
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continue 2;
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}
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}
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$newStr .= $token;
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}
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return $newStr;
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}
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/**
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* Creates a new StripPhpComments using the passed in
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* Reader for instantiation.
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*
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* @param A|Reader $reader
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* @return $this a new filter based on this configuration, but filtering
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* the specified reader
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* @internal param A $reader Reader object providing the underlying stream.
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* Must not be <code>null</code>.
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*/
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public function chain(Reader $reader): Reader
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{
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$newFilter = new StripPhpComments($reader);
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$newFilter->setProject($this->getProject());
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return $newFilter;
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}
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}
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siad007