82 lines
2.0 KiB
PHP
82 lines
2.0 KiB
PHP
<?php
|
|
//
|
|
// FPDI - Version 1.2.1
|
|
//
|
|
// Copyright 2004-2008 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 {
|
|
|
|
var $file;
|
|
var $buffer;
|
|
var $offset;
|
|
var $length;
|
|
|
|
var $stack;
|
|
|
|
// Constructor
|
|
|
|
function pdf_context($f) {
|
|
$this->file = $f;
|
|
$this->reset();
|
|
}
|
|
|
|
// Optionally move the file
|
|
// pointer to a new location
|
|
// and reset the buffered data
|
|
|
|
function reset($pos = null, $l = 100) {
|
|
if (!is_null ($pos)) {
|
|
fseek ($this->file, $pos);
|
|
}
|
|
|
|
$this->buffer = $l > 0 ? fread($this->file, $l) : '';
|
|
$this->length = strlen($this->buffer);
|
|
if ($this->length < $l)
|
|
$this->increase_length($l - $this->length);
|
|
$this->offset = 0;
|
|
$this->stack = array();
|
|
}
|
|
|
|
// Make sure that there is at least one
|
|
// character beyond the current offset in
|
|
// the buffer to prevent the tokenizer
|
|
// from attempting to access data that does
|
|
// not exist
|
|
|
|
function ensure_content() {
|
|
if ($this->offset >= $this->length - 1) {
|
|
return $this->increase_length();
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Forcefully read more data into the buffer
|
|
|
|
function increase_length($l=100) {
|
|
if (feof($this->file)) {
|
|
return false;
|
|
} else {
|
|
$totalLength = $this->length + $l;
|
|
do {
|
|
$this->buffer .= fread($this->file, $totalLength-$this->length);
|
|
} while ((($this->length = strlen($this->buffer)) != $totalLength) && !feof($this->file));
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
} |