3 // FPDI - Version 1.2.1
5 // Copyright 2004-2008 Setasign - Jan Slabon
7 // Licensed under the Apache License, Version 2.0 (the "License");
8 // you may not use this file except in compliance with the License.
9 // You may obtain a copy of the License at
11 // http://www.apache.org/licenses/LICENSE-2.0
13 // Unless required by applicable law or agreed to in writing, software
14 // distributed under the License is distributed on an "AS IS" BASIS,
15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 // See the License for the specific language governing permissions and
17 // limitations under the License.
31 function pdf_context($f) {
36 // Optionally move the file
37 // pointer to a new location
38 // and reset the buffered data
40 function reset($pos = null, $l = 100) {
41 if (!is_null ($pos)) {
42 fseek ($this->file, $pos);
45 $this->buffer = $l > 0 ? fread($this->file, $l) : '';
46 $this->length = strlen($this->buffer);
47 if ($this->length < $l)
48 $this->increase_length($l - $this->length);
50 $this->stack = array();
53 // Make sure that there is at least one
54 // character beyond the current offset in
55 // the buffer to prevent the tokenizer
56 // from attempting to access data that does
59 function ensure_content() {
60 if ($this->offset >= $this->length - 1) {
61 return $this->increase_length();
67 // Forcefully read more data into the buffer
69 function increase_length($l=100) {
70 if (feof($this->file)) {
73 $totalLength = $this->length + $l;
75 $this->buffer .= fread($this->file, $totalLength-$this->length);
76 } while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file));