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;
                }
        }

}
?>