Subversion-Projekte lars-tiefland.php_share

<?php

//

//  FPDI - Version 1.4.2

//

//    Copyright 2004-2011 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.

//

if (!class_exists('pdf_context', false)) {

    class pdf_context {

        /**

         * Modi

         *

         * @var integer 0 = file | 1 = string

         */

        var $_mode = 0;

    	var $file;

    	var $buffer;

    	var $offset;

    	var $length;

    	var $stack;

    	// Constructor

    	function pdf_context(&$f) {

    		$this->file =& $f;

    		if (is_string($this->file))

    		    $this->_mode = 1;

    		$this->reset();

    	}

    	// Optionally move the file

    	// pointer to a new location

    	// and reset the buffered data

    	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)

                    $this->increase_length($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

    	function ensure_content() {

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

    			return $this->increase_length();

    		} else {

    			return true;

    		}

    	}

    	// Forcefully read more data into the buffer

    	function increase_length($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;

			}

		}

    }

}