GreenCape/xml-converter

<?php
/**
 * GreenCape XML Converter
 *
 * MIT License
 *
 * Copyright (c) 2012-2015, Niels Braczek <nbraczek@bsds.de>. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * @package         GreenCape\Xml
 * @author          Niels Braczek <nbraczek@bsds.de>
 * @copyright   (C) 2012-2015 GreenCape, Niels Braczek <nbraczek@bsds.de>
 * @license         http://opensource.org/licenses/MIT The MIT license (MIT)
 * @link            http://greencape.github.io
 * @since           File available since Release 1.1.0
 */

namespace GreenCape\Xml;

/**
 * XML Stream Class
 *
 * @package GreenCape\Xml
 * @author  Niels Braczek <nbraczek@bsds.de>
 * @since   Class available since Release 1.1.0
 */
class Stream
{
    /** @var string  */
    private $data;

    /** @var int  */
    private $line = 1;

    /**
     * Stream constructor.
     *
     * @param string $data
     */
    public function __construct($data)
    {
        $this->data = $data;
    }

    /**
     * @param        $string
     * @param string $modifier
     *
     * @return bool
     */
    public function matches($string, $modifier = '')
    {
        $stream = substr($this->data, 0, strlen($string));

        if (strpos($modifier, 'i') !== false) {
            $stream = strtolower($stream);
            $string = strtolower($string);
        }

        return $stream === $string;
    }

    /**
     * @return string
     */
    public function flush()
    {
        $r          = $this->data;
        $this->data = null;

        return $r;
    }

    /**
     * @return bool
     */
    public function isEmpty()
    {
        return empty($this->data);
    }

    /**
     * @return int
     */
    public function line()
    {
        return $this->line;
    }

    /**
     * @param $char
     *
     * @return string
     */
    public function readTo($char)
    {
        $result = '';

        while ($this->current() != $char) {
            $result .= $this->next();
        }

        return $result;
    }

    /**
     * @return mixed
     */
    public function current()
    {
        return $this->data[0];
    }

    /**
     * @param int $length
     *
     * @return false|string
     */
    public function next($length = 1)
    {
        $c          = substr($this->data, 0, $length);
        $this->data = substr($this->data, $length);

        for ($i = 0, $iMax = strlen($c); $i < $iMax; ++$i) {
            if ($c[$i] === "\n") {
                $this->line++;
            }
        }

        return $c;
    }
}