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<?php |
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// |
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// FPDI - Version 1.4.2 |
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// |
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// Copyright 2004-2011 Setasign - Jan Slabon |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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|
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if (!class_exists('pdf_context', false)) { |
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|
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class pdf_context { |
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|
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/** |
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* Modi |
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* |
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* @var integer 0 = file | 1 = string |
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*/ |
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var $_mode = 0; |
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|
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var $file; |
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var $buffer; |
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var $offset; |
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var $length; |
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|
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var $stack; |
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|
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// Constructor |
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|
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function pdf_context(&$f) { |
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$this->file =& $f; |
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if (is_string($this->file)) |
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$this->_mode = 1; |
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$this->reset(); |
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} |
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|
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// Optionally move the file |
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// pointer to a new location |
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// and reset the buffered data |
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|
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function reset($pos = null, $l = 100) { |
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if ($this->_mode == 0) { |
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if (!is_null ($pos)) { |
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fseek ($this->file, $pos); |
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} |
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|
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$this->buffer = $l > 0 ? fread($this->file, $l) : ''; |
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$this->length = strlen($this->buffer); |
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if ($this->length < $l) |
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$this->increase_length($l - $this->length); |
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} else { |
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$this->buffer = $this->file; |
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$this->length = strlen($this->buffer); |
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} |
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$this->offset = 0; |
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$this->stack = array(); |
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} |
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|
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// Make sure that there is at least one |
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// character beyond the current offset in |
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// the buffer to prevent the tokenizer |
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// from attempting to access data that does |
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// not exist |
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|
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function ensure_content() { |
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if ($this->offset >= $this->length - 1) { |
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return $this->increase_length(); |
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} else { |
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return true; |
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} |
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} |
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|
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// Forcefully read more data into the buffer |
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|
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function increase_length($l = 100) { |
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if ($this->_mode == 0 && feof($this->file)) { |
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return false; |
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} else if ($this->_mode == 0) { |
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$totalLength = $this->length + $l; |
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do { |
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$toRead = $totalLength - $this->length; |
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if ($toRead < 1) |
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break; |
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|
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$this->buffer .= fread($this->file, $toRead); |
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} while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file)); |
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|
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return true; |
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} else { |
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return false; |
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} |
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} |
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} |
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} |
