Subversion Repositories cheapmusic

<?php

//

//  FPDI - Version 1.2

//

//    Copyright 2004-2007 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 {

	var $file;

	var $buffer;

	var $offset;

	var $length;

	var $stack;

	// Constructor

	function pdf_context($f) {

		$this->file = $f;

		$this->reset();

	}

	// Optionally move the file

	// pointer to a new location

	// and reset the buffered data

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

		if (!is_null ($pos)) {

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

		}

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

		$this->offset = 0;

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

		$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 (feof($this->file)) {

			return false;

		} else {

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

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

			return true;

		}

	}

}

?>