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- <?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;
- }
- }
- }
- ?>
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