Club Drupal

<?php

//

//  FPDI - Version 1.5.4

//

//    Copyright 2004-2015 Setasign - Jan Slabon

//

//  Licensed under the Apache License, Version 2.0 (the "License");

//  you may not use this file except in compliance with the License.

//  You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

//  Unless required by applicable law or agreed to in writing, software

//  distributed under the License is distributed on an "AS IS" BASIS,

//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

//  See the License for the specific language governing permissions and

//  limitations under the License.

//

/**

 * Class pdf_context

 */

class pdf_context

{

    /**

     * Mode

     *

     * @var integer 0 = file | 1 = string

     */

    protected $_mode = 0;

    /**

     * @var resource|string

     */

    public $file;

    /**

     * @var string

     */

    public $buffer;

    /**

     * @var integer

     */

    public $offset;

    /**

     * @var integer

     */

    public $length;

    /**

     * @var array

     */

    public $stack;

    /**

     * The constructor

     *

     * @param resource $f

     */

    public function __construct(&$f)

    {

        $this->file =& $f;

        if (is_string($this->file))

            $this->_mode = 1;

        $this->reset();

    }

    /**

     * Get the position in the file stream

     *

     * @return int

     */

    public function getPos()

    {

        if ($this->_mode == 0) {

            return ftell($this->file);

        } else {

            return 0;

        }

    }

    /**

     * Reset the position in the file stream.

     *

     * Optionally move the file pointer to a new location and reset the buffered data.

     *

     * @param null $pos

     * @param int $l

     */

    public function reset($pos = null, $l = 100)

    {

        if ($this->_mode == 0) {

            if (!is_null($pos)) {

                fseek ($this->file, $pos);

            }

            $this->buffer = $l > 0 ? fread($this->file, $l) : '';

            $this->length = strlen($this->buffer);

            if ($this->length < $l)

                $this->increaseLength($l - $this->length);

        } else {

            $this->buffer = $this->file;

            $this->length = strlen($this->buffer);

        }

        $this->offset = 0;

        $this->stack = array();

    }

    /**

     * Make sure that there is at least one character beyond the current offset in the buffer.

     *

     * To prevent the tokenizer from attempting to access data that does not exist.

     *

     * @return bool

     */

    public function ensureContent()

    {

        if ($this->offset >= $this->length - 1) {

            return $this->increaseLength();

        } else {

            return true;

        }

    }

    /**

     * Forcefully read more data into the buffer

     *

     * @param int $l

     * @return bool

     */

    public function increaseLength($l = 100)

    {

        if ($this->_mode == 0 && feof($this->file)) {

            return false;

        } else if ($this->_mode == 0) {

            $totalLength = $this->length + $l;

            do {

                $toRead = $totalLength - $this->length;

                if ($toRead < 1)

                    break;

                $this->buffer .= fread($this->file, $toRead);

            } while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file));

            return true;

        } else {

            return false;

        }

    }

}