153 lines
3.6 KiB
PHP
153 lines
3.6 KiB
PHP
<?php
|
|
//
|
|
// FPDI - Version 1.5.1
|
|
//
|
|
// Copyright 2004-2014 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
|
|
*/
|
|
class pdf_context
|
|
{
|
|
/**
|
|
* Mode
|
|
*
|
|
* @var integer 0 = file | 1 = string
|
|
*/
|
|
protected $_mode = 0;
|
|
|
|
/**
|
|
* @var resource|string
|
|
*/
|
|
public $file;
|
|
|
|
/**
|
|
* @var string
|
|
*/
|
|
public $buffer;
|
|
|
|
/**
|
|
* @var integer
|
|
*/
|
|
public $offset;
|
|
|
|
/**
|
|
* @var integer
|
|
*/
|
|
public $length;
|
|
|
|
/**
|
|
* @var array
|
|
*/
|
|
public $stack;
|
|
|
|
/**
|
|
* The constructor
|
|
*
|
|
* @param resource $f
|
|
*/
|
|
public function __construct(&$f)
|
|
{
|
|
$this->file =& $f;
|
|
if (is_string($this->file))
|
|
$this->_mode = 1;
|
|
|
|
$this->reset();
|
|
}
|
|
|
|
/**
|
|
* Get the position in the file stream
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getPos()
|
|
{
|
|
if ($this->_mode == 0) {
|
|
return ftell($this->file);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reset the position in the file stream.
|
|
*
|
|
* Optionally move the file pointer to a new location and reset the buffered data.
|
|
*
|
|
* @param null $pos
|
|
* @param int $l
|
|
*/
|
|
public function reset($pos = null, $l = 100)
|
|
{
|
|
if ($this->_mode == 0) {
|
|
if (!is_null($pos)) {
|
|
fseek ($this->file, $pos);
|
|
}
|
|
|
|
$this->buffer = $l > 0 ? fread($this->file, $l) : '';
|
|
$this->length = strlen($this->buffer);
|
|
if ($this->length < $l)
|
|
$this->increaseLength($l - $this->length);
|
|
} else {
|
|
$this->buffer = $this->file;
|
|
$this->length = strlen($this->buffer);
|
|
}
|
|
$this->offset = 0;
|
|
$this->stack = array();
|
|
}
|
|
|
|
/**
|
|
* Make sure that there is at least one character beyond the current offset in the buffer.
|
|
*
|
|
* To prevent the tokenizer from attempting to access data that does not exist.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function ensureContent()
|
|
{
|
|
if ($this->offset >= $this->length - 1) {
|
|
return $this->increaseLength();
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Forcefully read more data into the buffer
|
|
*
|
|
* @param int $l
|
|
* @return bool
|
|
*/
|
|
public function increaseLength($l = 100)
|
|
{
|
|
if ($this->_mode == 0 && feof($this->file)) {
|
|
return false;
|
|
} else if ($this->_mode == 0) {
|
|
$totalLength = $this->length + $l;
|
|
do {
|
|
$toRead = $totalLength - $this->length;
|
|
if ($toRead < 1)
|
|
break;
|
|
|
|
$this->buffer .= fread($this->file, $toRead);
|
|
} while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file));
|
|
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
} |