root / drupal7 / sites / all / libraries / fpdi-version / pdf_context.php @ 152165a8
1 | 85ad3d82 | Assos Assos | <?php
|
---|---|---|---|
2 | //
|
||
3 | // FPDI - Version 1.4.4
|
||
4 | //
|
||
5 | // Copyright 2004-2013 Setasign - Jan Slabon
|
||
6 | //
|
||
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
|
||
10 | //
|
||
11 | // http://www.apache.org/licenses/LICENSE-2.0
|
||
12 | //
|
||
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.
|
||
18 | //
|
||
19 | |||
20 | if (!class_exists('pdf_context', false)) { |
||
21 | |||
22 | class pdf_context { |
||
23 | |||
24 | /**
|
||
25 | * Modi
|
||
26 | *
|
||
27 | * @var integer 0 = file | 1 = string
|
||
28 | */
|
||
29 | var $_mode = 0; |
||
30 | |||
31 | var $file; |
||
32 | var $buffer; |
||
33 | var $offset; |
||
34 | var $length; |
||
35 | |||
36 | var $stack; |
||
37 | |||
38 | // Constructor
|
||
39 | |||
40 | function pdf_context(&$f) { |
||
41 | $this->file =& $f; |
||
42 | if (is_string($this->file)) |
||
43 | $this->_mode = 1; |
||
44 | $this->reset(); |
||
45 | } |
||
46 | |||
47 | // Optionally move the file
|
||
48 | // pointer to a new location
|
||
49 | // and reset the buffered data
|
||
50 | |||
51 | function reset($pos = null, $l = 100) { |
||
52 | if ($this->_mode == 0) { |
||
53 | if (!is_null ($pos)) { |
||
54 | fseek ($this->file, $pos); |
||
55 | } |
||
56 | |||
57 | $this->buffer = $l > 0 ? fread($this->file, $l) : ''; |
||
58 | $this->length = strlen($this->buffer); |
||
59 | if ($this->length < $l) |
||
60 | $this->increase_length($l - $this->length); |
||
61 | } else {
|
||
62 | $this->buffer = $this->file; |
||
63 | $this->length = strlen($this->buffer); |
||
64 | } |
||
65 | $this->offset = 0; |
||
66 | $this->stack = array(); |
||
67 | } |
||
68 | |||
69 | // Make sure that there is at least one
|
||
70 | // character beyond the current offset in
|
||
71 | // the buffer to prevent the tokenizer
|
||
72 | // from attempting to access data that does
|
||
73 | // not exist
|
||
74 | |||
75 | function ensure_content() { |
||
76 | if ($this->offset >= $this->length - 1) { |
||
77 | return $this->increase_length(); |
||
78 | } else {
|
||
79 | return true; |
||
80 | } |
||
81 | } |
||
82 | |||
83 | // Forcefully read more data into the buffer
|
||
84 | |||
85 | function increase_length($l = 100) { |
||
86 | if ($this->_mode == 0 && feof($this->file)) { |
||
87 | return false; |
||
88 | } elseif ($this->_mode == 0) { |
||
89 | $totalLength = $this->length + $l; |
||
90 | do {
|
||
91 | $toRead = $totalLength - $this->length; |
||
92 | if ($toRead < 1) |
||
93 | break;
|
||
94 | |||
95 | $this->buffer .= fread($this->file, $toRead); |
||
96 | } while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file)); |
||
97 | |||
98 | return true; |
||
99 | } else {
|
||
100 | return false; |
||
101 | } |
||
102 | } |
||
103 | } |
||
104 | } |