root / drupal7 / sites / all / libraries / fpdi-1.5.4 / pdf_context.php @ 4b706e38
| 1 | 60370e04 | Assos Assos | <?php
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| 2 | //
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| 3 | // FPDI - Version 1.5.4
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| 4 | //
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| 5 | // Copyright 2004-2015 Setasign - Jan Slabon
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| 6 | //
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| 7 | // Licensed under the Apache License, Version 2.0 (the "License");
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| 8 | // you may not use this file except in compliance with the License.
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| 9 | // You may obtain a copy of the License at
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| 10 | //
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| 11 | // http://www.apache.org/licenses/LICENSE-2.0
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| 12 | //
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| 13 | // Unless required by applicable law or agreed to in writing, software
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| 14 | // distributed under the License is distributed on an "AS IS" BASIS,
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| 15 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | // See the License for the specific language governing permissions and
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| 17 | // limitations under the License.
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| 18 | //
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| 19 | |||
| 20 | /**
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| 21 | * Class pdf_context
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| 22 | */
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| 23 | class pdf_context |
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| 24 | {
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| 25 | /**
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| 26 | * Mode
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| 27 | *
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| 28 | * @var integer 0 = file | 1 = string
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| 29 | */
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| 30 | protected $_mode = 0; |
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| 31 | |||
| 32 | /**
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| 33 | * @var resource|string
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| 34 | */
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| 35 | public $file; |
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| 36 | |||
| 37 | /**
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| 38 | * @var string
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| 39 | */
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| 40 | public $buffer; |
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| 41 | |||
| 42 | /**
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| 43 | * @var integer
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| 44 | */
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| 45 | public $offset; |
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| 46 | |||
| 47 | /**
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| 48 | * @var integer
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| 49 | */
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| 50 | public $length; |
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| 51 | |||
| 52 | /**
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| 53 | * @var array
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| 54 | */
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| 55 | public $stack; |
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| 56 | |||
| 57 | /**
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| 58 | * The constructor
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| 59 | *
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| 60 | * @param resource $f
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| 61 | */
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| 62 | public function __construct(&$f) |
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| 63 | {
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| 64 | $this->file =& $f; |
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| 65 | if (is_string($this->file)) |
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| 66 | $this->_mode = 1; |
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| 67 | |||
| 68 | $this->reset(); |
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| 69 | } |
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| 70 | |||
| 71 | /**
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| 72 | * Get the position in the file stream
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| 73 | *
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| 74 | * @return int
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| 75 | */
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| 76 | public function getPos() |
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| 77 | {
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| 78 | if ($this->_mode == 0) { |
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| 79 | return ftell($this->file); |
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| 80 | } else {
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| 81 | return 0; |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 85 | /**
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| 86 | * Reset the position in the file stream.
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| 87 | *
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| 88 | * Optionally move the file pointer to a new location and reset the buffered data.
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| 89 | *
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| 90 | * @param null $pos
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| 91 | * @param int $l
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| 92 | */
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| 93 | public function reset($pos = null, $l = 100) |
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| 94 | {
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| 95 | if ($this->_mode == 0) { |
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| 96 | if (!is_null($pos)) { |
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| 97 | fseek ($this->file, $pos); |
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| 98 | } |
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| 99 | |||
| 100 | $this->buffer = $l > 0 ? fread($this->file, $l) : ''; |
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| 101 | $this->length = strlen($this->buffer); |
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| 102 | if ($this->length < $l) |
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| 103 | $this->increaseLength($l - $this->length); |
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| 104 | } else {
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| 105 | $this->buffer = $this->file; |
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| 106 | $this->length = strlen($this->buffer); |
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| 107 | } |
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| 108 | $this->offset = 0; |
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| 109 | $this->stack = array(); |
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| 110 | } |
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| 111 | |||
| 112 | /**
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| 113 | * Make sure that there is at least one character beyond the current offset in the buffer.
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| 114 | *
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| 115 | * To prevent the tokenizer from attempting to access data that does not exist.
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| 116 | *
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| 117 | * @return bool
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| 118 | */
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| 119 | public function ensureContent() |
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| 120 | {
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| 121 | if ($this->offset >= $this->length - 1) { |
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| 122 | return $this->increaseLength(); |
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| 123 | } else {
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| 124 | return true; |
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| 125 | } |
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| 126 | } |
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| 127 | |||
| 128 | /**
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| 129 | * Forcefully read more data into the buffer
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| 130 | *
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| 131 | * @param int $l
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| 132 | * @return bool
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| 133 | */
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| 134 | public function increaseLength($l = 100) |
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| 135 | {
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| 136 | if ($this->_mode == 0 && feof($this->file)) { |
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| 137 | return false; |
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| 138 | } else if ($this->_mode == 0) { |
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| 139 | $totalLength = $this->length + $l; |
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| 140 | do {
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| 141 | $toRead = $totalLength - $this->length; |
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| 142 | if ($toRead < 1) |
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| 143 | break;
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| 144 | |||
| 145 | $this->buffer .= fread($this->file, $toRead); |
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| 146 | } while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file)); |
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| 147 | |||
| 148 | return true; |
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| 149 | } else {
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| 150 | return false; |
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| 151 | } |
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| 152 | } |
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| 153 | } |