| @@ -1,719 +1,719 @@ | ||
| 1 | -<?php | |
| 2 | -// | |
| 3 | -// FPDI - Version 1.4.2 | |
| 4 | -// | |
| 5 | -// Copyright 2004-2011 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 (!defined ('PDF_TYPE_NULL')) | |
| 21 | - define ('PDF_TYPE_NULL', 0); | |
| 22 | -if (!defined ('PDF_TYPE_NUMERIC')) | |
| 23 | - define ('PDF_TYPE_NUMERIC', 1); | |
| 24 | -if (!defined ('PDF_TYPE_TOKEN')) | |
| 25 | - define ('PDF_TYPE_TOKEN', 2); | |
| 26 | -if (!defined ('PDF_TYPE_HEX')) | |
| 27 | - define ('PDF_TYPE_HEX', 3); | |
| 28 | -if (!defined ('PDF_TYPE_STRING')) | |
| 29 | - define ('PDF_TYPE_STRING', 4); | |
| 30 | -if (!defined ('PDF_TYPE_DICTIONARY')) | |
| 31 | - define ('PDF_TYPE_DICTIONARY', 5); | |
| 32 | -if (!defined ('PDF_TYPE_ARRAY')) | |
| 33 | - define ('PDF_TYPE_ARRAY', 6); | |
| 34 | -if (!defined ('PDF_TYPE_OBJDEC')) | |
| 35 | - define ('PDF_TYPE_OBJDEC', 7); | |
| 36 | -if (!defined ('PDF_TYPE_OBJREF')) | |
| 37 | - define ('PDF_TYPE_OBJREF', 8); | |
| 38 | -if (!defined ('PDF_TYPE_OBJECT')) | |
| 39 | - define ('PDF_TYPE_OBJECT', 9); | |
| 40 | -if (!defined ('PDF_TYPE_STREAM')) | |
| 41 | - define ('PDF_TYPE_STREAM', 10); | |
| 42 | -if (!defined ('PDF_TYPE_BOOLEAN')) | |
| 43 | - define ('PDF_TYPE_BOOLEAN', 11); | |
| 44 | -if (!defined ('PDF_TYPE_REAL')) | |
| 45 | - define ('PDF_TYPE_REAL', 12); | |
| 46 | - | |
| 47 | -require_once( USCES_PLUGIN_DIR . '/pdf/fpdi/pdf_context.php'); | |
| 48 | - | |
| 49 | -if (!class_exists('pdf_parser', false)) { | |
| 50 | - | |
| 51 | - class pdf_parser { | |
| 52 | - | |
| 53 | - /** | |
| 54 | - * Filename | |
| 55 | - * @var string | |
| 56 | - */ | |
| 57 | - var $filename; | |
| 58 | - | |
| 59 | - /** | |
| 60 | - * File resource | |
| 61 | - * @var resource | |
| 62 | - */ | |
| 63 | - var $f; | |
| 64 | - | |
| 65 | - /** | |
| 66 | - * PDF Context | |
| 67 | - * @var object pdf_context-Instance | |
| 68 | - */ | |
| 69 | - var $c; | |
| 70 | - | |
| 71 | - /** | |
| 72 | - * xref-Data | |
| 73 | - * @var array | |
| 74 | - */ | |
| 75 | - var $xref; | |
| 76 | - | |
| 77 | - /** | |
| 78 | - * root-Object | |
| 79 | - * @var array | |
| 80 | - */ | |
| 81 | - var $root; | |
| 82 | - | |
| 83 | - /** | |
| 84 | - * PDF version of the loaded document | |
| 85 | - * @var string | |
| 86 | - */ | |
| 87 | - var $pdfVersion; | |
| 88 | - | |
| 89 | - /** | |
| 90 | - * For reading encrypted documents and xref/objectstreams are in use | |
| 91 | - * | |
| 92 | - * @var boolean | |
| 93 | - */ | |
| 94 | - var $readPlain = true; | |
| 95 | - | |
| 96 | - /** | |
| 97 | - * Constructor | |
| 98 | - * | |
| 99 | - * @param string $filename Source-Filename | |
| 100 | - */ | |
| 101 | - function pdf_parser($filename) { | |
| 102 | - $this->filename = $filename; | |
| 103 | - | |
| 104 | - $this->f = @fopen($this->filename, 'rb'); | |
| 105 | - | |
| 106 | - if (!$this->f) | |
| 107 | - $this->error(sprintf('Cannot open %s !', $filename)); | |
| 108 | - | |
| 109 | - $this->getPDFVersion(); | |
| 110 | - | |
| 111 | - $this->c = new pdf_context($this->f); | |
| 112 | - | |
| 113 | - // Read xref-Data | |
| 114 | - $this->xref = array(); | |
| 115 | - $this->pdf_read_xref($this->xref, $this->pdf_find_xref()); | |
| 116 | - | |
| 117 | - // Check for Encryption | |
| 118 | - $this->getEncryption(); | |
| 119 | - | |
| 120 | - // Read root | |
| 121 | - $this->pdf_read_root(); | |
| 122 | - } | |
| 123 | - | |
| 124 | - /** | |
| 125 | - * Close the opened file | |
| 126 | - */ | |
| 127 | - function closeFile() { | |
| 128 | - if (isset($this->f) && is_resource($this->f)) { | |
| 129 | - fclose($this->f); | |
| 130 | - unset($this->f); | |
| 131 | - } | |
| 132 | - } | |
| 133 | - | |
| 134 | - /** | |
| 135 | - * Print Error and die | |
| 136 | - * | |
| 137 | - * @param string $msg Error-Message | |
| 138 | - */ | |
| 139 | - function error($msg) { | |
| 140 | - die('<b>PDF-Parser Error:</b> ' . $msg); | |
| 141 | - } | |
| 142 | - | |
| 143 | - /** | |
| 144 | - * Check Trailer for Encryption | |
| 145 | - */ | |
| 146 | - function getEncryption() { | |
| 147 | - if (isset($this->xref['trailer'][1]['/Encrypt'])) { | |
| 148 | - $this->error('File is encrypted!'); | |
| 149 | - } | |
| 150 | - } | |
| 151 | - | |
| 152 | - /** | |
| 153 | - * Find/Return /Root | |
| 154 | - * | |
| 155 | - * @return array | |
| 156 | - */ | |
| 157 | - function pdf_find_root() { | |
| 158 | - if ($this->xref['trailer'][1]['/Root'][0] != PDF_TYPE_OBJREF) { | |
| 159 | - $this->error('Wrong Type of Root-Element! Must be an indirect reference'); | |
| 160 | - } | |
| 161 | - | |
| 162 | - return $this->xref['trailer'][1]['/Root']; | |
| 163 | - } | |
| 164 | - | |
| 165 | - /** | |
| 166 | - * Read the /Root | |
| 167 | - */ | |
| 168 | - function pdf_read_root() { | |
| 169 | - // read root | |
| 170 | - $this->root = $this->pdf_resolve_object($this->c, $this->pdf_find_root()); | |
| 171 | - } | |
| 172 | - | |
| 173 | - /** | |
| 174 | - * Get PDF-Version | |
| 175 | - * | |
| 176 | - * And reset the PDF Version used in FPDI if needed | |
| 177 | - */ | |
| 178 | - function getPDFVersion() { | |
| 179 | - fseek($this->f, 0); | |
| 180 | - preg_match('/\d\.\d/',fread($this->f, 16), $m); | |
| 181 | - if (isset($m[0])) | |
| 182 | - $this->pdfVersion = $m[0]; | |
| 183 | - return $this->pdfVersion; | |
| 184 | - } | |
| 185 | - | |
| 186 | - /** | |
| 187 | - * Find the xref-Table | |
| 188 | - */ | |
| 189 | - function pdf_find_xref() { | |
| 190 | - $toRead = 1500; | |
| 191 | - | |
| 192 | - $stat = fseek ($this->f, -$toRead, SEEK_END); | |
| 193 | - if ($stat === -1) { | |
| 194 | - fseek ($this->f, 0); | |
| 195 | - } | |
| 196 | - $data = fread($this->f, $toRead); | |
| 197 | - | |
| 198 | - $pos = strlen($data) - strpos(strrev($data), strrev('startxref')); | |
| 199 | - $data = substr($data, $pos); | |
| 200 | - | |
| 201 | - if (!preg_match('/\s*(\d+).*$/s', $data, $matches)) { | |
| 202 | - $this->error('Unable to find pointer to xref table'); | |
| 203 | - } | |
| 204 | - | |
| 205 | - return (int) $matches[1]; | |
| 206 | - } | |
| 207 | - | |
| 208 | - /** | |
| 209 | - * Read xref-table | |
| 210 | - * | |
| 211 | - * @param array $result Array of xref-table | |
| 212 | - * @param integer $offset of xref-table | |
| 213 | - */ | |
| 214 | - function pdf_read_xref(&$result, $offset) { | |
| 215 | - $o_pos = $offset-min(20, $offset); | |
| 216 | - fseek($this->f, $o_pos); // set some bytes backwards to fetch errorious docs | |
| 217 | - | |
| 218 | - $data = fread($this->f, 100); | |
| 219 | - | |
| 220 | - $xrefPos = strrpos($data, 'xref'); | |
| 221 | - | |
| 222 | - if ($xrefPos === false) { | |
| 223 | - fseek($this->f, $offset); | |
| 224 | - $c = new pdf_context($this->f); | |
| 225 | - $xrefStreamObjDec = $this->pdf_read_value($c); | |
| 226 | - | |
| 227 | - if (is_array($xrefStreamObjDec) && isset($xrefStreamObjDec[0]) && $xrefStreamObjDec[0] == PDF_TYPE_OBJDEC) { | |
| 228 | - $this->error(sprintf('This document (%s) probably uses a compression technique which is not supported by the free parser shipped with FPDI.', $this->filename)); | |
| 229 | - } else { | |
| 230 | - $this->error('Unable to find xref table.'); | |
| 231 | - } | |
| 232 | - } | |
| 233 | - | |
| 234 | - if (!isset($result['xref_location'])) { | |
| 235 | - $result['xref_location'] = $o_pos + $xrefPos; | |
| 236 | - $result['max_object'] = 0; | |
| 237 | - } | |
| 238 | - | |
| 239 | - $cylces = -1; | |
| 240 | - $bytesPerCycle = 100; | |
| 241 | - | |
| 242 | - fseek($this->f, $o_pos = $o_pos + $xrefPos + 4); // set the handle directly after the "xref"-keyword | |
| 243 | - $data = fread($this->f, $bytesPerCycle); | |
| 244 | - | |
| 245 | - while (($trailerPos = strpos($data, 'trailer', max($bytesPerCycle * $cylces++, 0))) === false && !feof($this->f)) { | |
| 246 | - $data .= fread($this->f, $bytesPerCycle); | |
| 247 | - } | |
| 248 | - | |
| 249 | - if ($trailerPos === false) { | |
| 250 | - $this->error('Trailer keyword not found after xref table'); | |
| 251 | - } | |
| 252 | - | |
| 253 | - $data = substr($data, 0, $trailerPos); | |
| 254 | - | |
| 255 | - // get Line-Ending | |
| 256 | - preg_match_all("/(\r\n|\n|\r)/", substr($data, 0, 100), $m); // check the first 100 bytes for linebreaks | |
| 257 | - | |
| 258 | - $differentLineEndings = count(array_unique($m[0])); | |
| 259 | - if ($differentLineEndings > 1) { | |
| 260 | - $lines = preg_split("/(\r\n|\n|\r)/", $data, -1, PREG_SPLIT_NO_EMPTY); | |
| 261 | - } else { | |
| 262 | - $lines = explode($m[0][1], $data); | |
| 263 | - } | |
| 264 | - | |
| 265 | - $data = $differentLineEndings = $m = null; | |
| 266 | - unset($data, $differentLineEndings, $m); | |
| 267 | - | |
| 268 | - $linesCount = count($lines); | |
| 269 | - | |
| 270 | - $start = 1; | |
| 271 | - | |
| 272 | - for ($i = 0; $i < $linesCount; $i++) { | |
| 273 | - $line = trim($lines[$i]); | |
| 274 | - if ($line) { | |
| 275 | - $pieces = explode(' ', $line); | |
| 276 | - $c = count($pieces); | |
| 277 | - switch($c) { | |
| 278 | - case 2: | |
| 279 | - $start = (int)$pieces[0]; | |
| 280 | - $end = $start + (int)$pieces[1]; | |
| 281 | - if ($end > $result['max_object']) | |
| 282 | - $result['max_object'] = $end; | |
| 283 | - break; | |
| 284 | - case 3: | |
| 285 | - if (!isset($result['xref'][$start])) | |
| 286 | - $result['xref'][$start] = array(); | |
| 287 | - | |
| 288 | - if (!array_key_exists($gen = (int) $pieces[1], $result['xref'][$start])) { | |
| 289 | - $result['xref'][$start][$gen] = $pieces[2] == 'n' ? (int) $pieces[0] : null; | |
| 290 | - } | |
| 291 | - $start++; | |
| 292 | - break; | |
| 293 | - default: | |
| 294 | - $this->error('Unexpected data in xref table'); | |
| 295 | - } | |
| 296 | - } | |
| 297 | - } | |
| 298 | - | |
| 299 | - $lines = $pieces = $line = $start = $end = $gen = null; | |
| 300 | - unset($lines, $pieces, $line, $start, $end, $gen); | |
| 301 | - | |
| 302 | - fseek($this->f, $o_pos + $trailerPos + 7); | |
| 303 | - | |
| 304 | - $c = new pdf_context($this->f); | |
| 305 | - $trailer = $this->pdf_read_value($c); | |
| 306 | - | |
| 307 | - $c = null; | |
| 308 | - unset($c); | |
| 309 | - | |
| 310 | - if (!isset($result['trailer'])) { | |
| 311 | - $result['trailer'] = $trailer; | |
| 312 | - } | |
| 313 | - | |
| 314 | - if (isset($trailer[1]['/Prev'])) { | |
| 315 | - $this->pdf_read_xref($result, $trailer[1]['/Prev'][1]); | |
| 316 | - } | |
| 317 | - | |
| 318 | - $trailer = null; | |
| 319 | - unset($trailer); | |
| 320 | - | |
| 321 | - return true; | |
| 322 | - } | |
| 323 | - | |
| 324 | - /** | |
| 325 | - * Reads an Value | |
| 326 | - * | |
| 327 | - * @param object $c pdf_context | |
| 328 | - * @param string $token a Token | |
| 329 | - * @return mixed | |
| 330 | - */ | |
| 331 | - function pdf_read_value(&$c, $token = null) { | |
| 332 | - if (is_null($token)) { | |
| 333 | - $token = $this->pdf_read_token($c); | |
| 334 | - } | |
| 335 | - | |
| 336 | - if ($token === false) { | |
| 337 | - return false; | |
| 338 | - } | |
| 339 | - | |
| 340 | - switch ($token) { | |
| 341 | - case '<': | |
| 342 | - // This is a hex string. | |
| 343 | - // Read the value, then the terminator | |
| 344 | - | |
| 345 | - $pos = $c->offset; | |
| 346 | - | |
| 347 | - while(1) { | |
| 348 | - | |
| 349 | - $match = strpos ($c->buffer, '>', $pos); | |
| 350 | - | |
| 351 | - // If you can't find it, try | |
| 352 | - // reading more data from the stream | |
| 353 | - | |
| 354 | - if ($match === false) { | |
| 355 | - if (!$c->increase_length()) { | |
| 356 | - return false; | |
| 357 | - } else { | |
| 358 | - continue; | |
| 359 | - } | |
| 360 | - } | |
| 361 | - | |
| 362 | - $result = substr ($c->buffer, $c->offset, $match - $c->offset); | |
| 363 | - $c->offset = $match + 1; | |
| 364 | - | |
| 365 | - return array (PDF_TYPE_HEX, $result); | |
| 366 | - } | |
| 367 | - | |
| 368 | - break; | |
| 369 | - case '<<': | |
| 370 | - // This is a dictionary. | |
| 371 | - | |
| 372 | - $result = array(); | |
| 373 | - | |
| 374 | - // Recurse into this function until we reach | |
| 375 | - // the end of the dictionary. | |
| 376 | - while (($key = $this->pdf_read_token($c)) !== '>>') { | |
| 377 | - if ($key === false) { | |
| 378 | - return false; | |
| 379 | - } | |
| 380 | - | |
| 381 | - if (($value = $this->pdf_read_value($c)) === false) { | |
| 382 | - return false; | |
| 383 | - } | |
| 384 | - | |
| 385 | - // Catch missing value | |
| 386 | - if ($value[0] == PDF_TYPE_TOKEN && $value[1] == '>>') { | |
| 387 | - $result[$key] = array(PDF_TYPE_NULL); | |
| 388 | - break; | |
| 389 | - } | |
| 390 | - | |
| 391 | - $result[$key] = $value; | |
| 392 | - } | |
| 393 | - | |
| 394 | - return array (PDF_TYPE_DICTIONARY, $result); | |
| 395 | - | |
| 396 | - case '[': | |
| 397 | - // This is an array. | |
| 398 | - | |
| 399 | - $result = array(); | |
| 400 | - | |
| 401 | - // Recurse into this function until we reach | |
| 402 | - // the end of the array. | |
| 403 | - while (($token = $this->pdf_read_token($c)) !== ']') { | |
| 404 | - if ($token === false) { | |
| 405 | - return false; | |
| 406 | - } | |
| 407 | - | |
| 408 | - if (($value = $this->pdf_read_value($c, $token)) === false) { | |
| 409 | - return false; | |
| 410 | - } | |
| 411 | - | |
| 412 | - $result[] = $value; | |
| 413 | - } | |
| 414 | - | |
| 415 | - return array (PDF_TYPE_ARRAY, $result); | |
| 416 | - | |
| 417 | - case '(' : | |
| 418 | - // This is a string | |
| 419 | - $pos = $c->offset; | |
| 420 | - | |
| 421 | - $openBrackets = 1; | |
| 422 | - do { | |
| 423 | - for (; $openBrackets != 0 && $pos < $c->length; $pos++) { | |
| 424 | - switch (ord($c->buffer[$pos])) { | |
| 425 | - case 0x28: // '(' | |
| 426 | - $openBrackets++; | |
| 427 | - break; | |
| 428 | - case 0x29: // ')' | |
| 429 | - $openBrackets--; | |
| 430 | - break; | |
| 431 | - case 0x5C: // backslash | |
| 432 | - $pos++; | |
| 433 | - } | |
| 434 | - } | |
| 435 | - } while($openBrackets != 0 && $c->increase_length()); | |
| 436 | - | |
| 437 | - $result = substr($c->buffer, $c->offset, $pos - $c->offset - 1); | |
| 438 | - $c->offset = $pos; | |
| 439 | - | |
| 440 | - return array (PDF_TYPE_STRING, $result); | |
| 441 | - | |
| 442 | - case 'stream': | |
| 443 | - $o_pos = ftell($c->file)-strlen($c->buffer); | |
| 444 | - $o_offset = $c->offset; | |
| 445 | - | |
| 446 | - $c->reset($startpos = $o_pos + $o_offset); | |
| 447 | - | |
| 448 | - $e = 0; // ensure line breaks in front of the stream | |
| 449 | - if ($c->buffer[0] == chr(10) || $c->buffer[0] == chr(13)) | |
| 450 | - $e++; | |
| 451 | - if ($c->buffer[1] == chr(10) && $c->buffer[0] != chr(10)) | |
| 452 | - $e++; | |
| 453 | - | |
| 454 | - if ($this->actual_obj[1][1]['/Length'][0] == PDF_TYPE_OBJREF) { | |
| 455 | - $tmp_c = new pdf_context($this->f); | |
| 456 | - $tmp_length = $this->pdf_resolve_object($tmp_c, $this->actual_obj[1][1]['/Length']); | |
| 457 | - $length = $tmp_length[1][1]; | |
| 458 | - } else { | |
| 459 | - $length = $this->actual_obj[1][1]['/Length'][1]; | |
| 460 | - } | |
| 461 | - | |
| 462 | - if ($length > 0) { | |
| 463 | - $c->reset($startpos + $e,$length); | |
| 464 | - $v = $c->buffer; | |
| 465 | - } else { | |
| 466 | - $v = ''; | |
| 467 | - } | |
| 468 | - $c->reset($startpos + $e + $length + 9); // 9 = strlen("endstream") | |
| 469 | - | |
| 470 | - return array(PDF_TYPE_STREAM, $v); | |
| 471 | - | |
| 472 | - default : | |
| 473 | - if (is_numeric ($token)) { | |
| 474 | - // A numeric token. Make sure that | |
| 475 | - // it is not part of something else. | |
| 476 | - if (($tok2 = $this->pdf_read_token ($c)) !== false) { | |
| 477 | - if (is_numeric ($tok2)) { | |
| 478 | - | |
| 479 | - // Two numeric tokens in a row. | |
| 480 | - // In this case, we're probably in | |
| 481 | - // front of either an object reference | |
| 482 | - // or an object specification. | |
| 483 | - // Determine the case and return the data | |
| 484 | - if (($tok3 = $this->pdf_read_token ($c)) !== false) { | |
| 485 | - switch ($tok3) { | |
| 486 | - case 'obj': | |
| 487 | - return array (PDF_TYPE_OBJDEC, (int) $token, (int) $tok2); | |
| 488 | - case 'R': | |
| 489 | - return array (PDF_TYPE_OBJREF, (int) $token, (int) $tok2); | |
| 490 | - } | |
| 491 | - // If we get to this point, that numeric value up | |
| 492 | - // there was just a numeric value. Push the extra | |
| 493 | - // tokens back into the stack and return the value. | |
| 494 | - array_push ($c->stack, $tok3); | |
| 495 | - } | |
| 496 | - } | |
| 497 | - | |
| 498 | - array_push ($c->stack, $tok2); | |
| 499 | - } | |
| 500 | - | |
| 501 | - if ($token === (string)((int)$token)) | |
| 502 | - return array (PDF_TYPE_NUMERIC, (int)$token); | |
| 503 | - else | |
| 504 | - return array (PDF_TYPE_REAL, (float)$token); | |
| 505 | - } else if ($token == 'true' || $token == 'false') { | |
| 506 | - return array (PDF_TYPE_BOOLEAN, $token == 'true'); | |
| 507 | - } else if ($token == 'null') { | |
| 508 | - return array (PDF_TYPE_NULL); | |
| 509 | - } else { | |
| 510 | - // Just a token. Return it. | |
| 511 | - return array (PDF_TYPE_TOKEN, $token); | |
| 512 | - } | |
| 513 | - } | |
| 514 | - } | |
| 515 | - | |
| 516 | - /** | |
| 517 | - * Resolve an object | |
| 518 | - * | |
| 519 | - * @param object $c pdf_context | |
| 520 | - * @param array $obj_spec The object-data | |
| 521 | - * @param boolean $encapsulate Must set to true, cause the parsing and fpdi use this method only without this para | |
| 522 | - */ | |
| 523 | - function pdf_resolve_object(&$c, $obj_spec, $encapsulate = true) { | |
| 524 | - // Exit if we get invalid data | |
| 525 | - if (!is_array($obj_spec)) { | |
| 526 | - $ret = false; | |
| 527 | - return $ret; | |
| 528 | - } | |
| 529 | - | |
| 530 | - if ($obj_spec[0] == PDF_TYPE_OBJREF) { | |
| 531 | - | |
| 532 | - // This is a reference, resolve it | |
| 533 | - if (isset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]])) { | |
| 534 | - | |
| 535 | - // Save current file position | |
| 536 | - // This is needed if you want to resolve | |
| 537 | - // references while you're reading another object | |
| 538 | - // (e.g.: if you need to determine the length | |
| 539 | - // of a stream) | |
| 540 | - | |
| 541 | - $old_pos = ftell($c->file); | |
| 542 | - | |
| 543 | - // Reposition the file pointer and | |
| 544 | - // load the object header. | |
| 545 | - | |
| 546 | - $c->reset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]]); | |
| 547 | - | |
| 548 | - $header = $this->pdf_read_value($c); | |
| 549 | - | |
| 550 | - if ($header[0] != PDF_TYPE_OBJDEC || $header[1] != $obj_spec[1] || $header[2] != $obj_spec[2]) { | |
| 551 | - $toSearchFor = $obj_spec[1] . ' ' . $obj_spec[2] . ' obj'; | |
| 552 | - if (preg_match('/' . $toSearchFor . '/', $c->buffer)) { | |
| 553 | - $c->offset = strpos($c->buffer, $toSearchFor) + strlen($toSearchFor); | |
| 554 | - // reset stack | |
| 555 | - $c->stack = array(); | |
| 556 | - } else { | |
| 557 | - $this->error("Unable to find object ({$obj_spec[1]}, {$obj_spec[2]}) at expected location"); | |
| 558 | - } | |
| 559 | - } | |
| 560 | - | |
| 561 | - // If we're being asked to store all the information | |
| 562 | - // about the object, we add the object ID and generation | |
| 563 | - // number for later use | |
| 564 | - $result = array(); | |
| 565 | - $this->actual_obj =& $result; | |
| 566 | - if ($encapsulate) { | |
| 567 | - $result = array ( | |
| 568 | - PDF_TYPE_OBJECT, | |
| 569 | - 'obj' => $obj_spec[1], | |
| 570 | - 'gen' => $obj_spec[2] | |
| 571 | - ); | |
| 572 | - } | |
| 573 | - | |
| 574 | - // Now simply read the object data until | |
| 575 | - // we encounter an end-of-object marker | |
| 576 | - while(1) { | |
| 577 | - $value = $this->pdf_read_value($c); | |
| 578 | - if ($value === false || count($result) > 4) { | |
| 579 | - // in this case the parser coudn't find an endobj so we break here | |
| 580 | - break; | |
| 581 | - } | |
| 582 | - | |
| 583 | - if ($value[0] == PDF_TYPE_TOKEN && $value[1] === 'endobj') { | |
| 584 | - break; | |
| 585 | - } | |
| 586 | - | |
| 587 | - $result[] = $value; | |
| 588 | - } | |
| 589 | - | |
| 590 | - $c->reset($old_pos); | |
| 591 | - | |
| 592 | - if (isset($result[2][0]) && $result[2][0] == PDF_TYPE_STREAM) { | |
| 593 | - $result[0] = PDF_TYPE_STREAM; | |
| 594 | - } | |
| 595 | - | |
| 596 | - return $result; | |
| 597 | - } | |
| 598 | - } else { | |
| 599 | - return $obj_spec; | |
| 600 | - } | |
| 601 | - } | |
| 602 | - | |
| 603 | - | |
| 604 | - | |
| 605 | - /** | |
| 606 | - * Reads a token from the file | |
| 607 | - * | |
| 608 | - * @param object $c pdf_context | |
| 609 | - * @return mixed | |
| 610 | - */ | |
| 611 | - function pdf_read_token(&$c) | |
| 612 | - { | |
| 613 | - // If there is a token available | |
| 614 | - // on the stack, pop it out and | |
| 615 | - // return it. | |
| 616 | - | |
| 617 | - if (count($c->stack)) { | |
| 618 | - return array_pop($c->stack); | |
| 619 | - } | |
| 620 | - | |
| 621 | - // Strip away any whitespace | |
| 622 | - | |
| 623 | - do { | |
| 624 | - if (!$c->ensure_content()) { | |
| 625 | - return false; | |
| 626 | - } | |
| 627 | - $c->offset += strspn($c->buffer, " \n\r\t", $c->offset); | |
| 628 | - } while ($c->offset >= $c->length - 1); | |
| 629 | - | |
| 630 | - // Get the first character in the stream | |
| 631 | - | |
| 632 | - $char = $c->buffer[$c->offset++]; | |
| 633 | - | |
| 634 | - switch ($char) { | |
| 635 | - | |
| 636 | - case '[': | |
| 637 | - case ']': | |
| 638 | - case '(': | |
| 639 | - case ')': | |
| 640 | - | |
| 641 | - // This is either an array or literal string | |
| 642 | - // delimiter, Return it | |
| 643 | - | |
| 644 | - return $char; | |
| 645 | - | |
| 646 | - case '<': | |
| 647 | - case '>': | |
| 648 | - | |
| 649 | - // This could either be a hex string or | |
| 650 | - // dictionary delimiter. Determine the | |
| 651 | - // appropriate case and return the token | |
| 652 | - | |
| 653 | - if ($c->buffer[$c->offset] == $char) { | |
| 654 | - if (!$c->ensure_content()) { | |
| 655 | - return false; | |
| 656 | - } | |
| 657 | - $c->offset++; | |
| 658 | - return $char . $char; | |
| 659 | - } else { | |
| 660 | - return $char; | |
| 661 | - } | |
| 662 | - | |
| 663 | - case '%': | |
| 664 | - | |
| 665 | - // This is a comment - jump over it! | |
| 666 | - | |
| 667 | - $pos = $c->offset; | |
| 668 | - while(1) { | |
| 669 | - $match = preg_match("/(\r\n|\r|\n)/", $c->buffer, $m, PREG_OFFSET_CAPTURE, $pos); | |
| 670 | - if ($match === 0) { | |
| 671 | - if (!$c->increase_length()) { | |
| 672 | - return false; | |
| 673 | - } else { | |
| 674 | - continue; | |
| 675 | - } | |
| 676 | - } | |
| 677 | - | |
| 678 | - $c->offset = $m[0][1]+strlen($m[0][0]); | |
| 679 | - | |
| 680 | - return $this->pdf_read_token($c); | |
| 681 | - } | |
| 682 | - | |
| 683 | - default: | |
| 684 | - | |
| 685 | - // This is "another" type of token (probably | |
| 686 | - // a dictionary entry or a numeric value) | |
| 687 | - // Find the end and return it. | |
| 688 | - | |
| 689 | - if (!$c->ensure_content()) { | |
| 690 | - return false; | |
| 691 | - } | |
| 692 | - | |
| 693 | - while(1) { | |
| 694 | - | |
| 695 | - // Determine the length of the token | |
| 696 | - | |
| 697 | - $pos = strcspn($c->buffer, " %[]<>()\r\n\t/", $c->offset); | |
| 698 | - | |
| 699 | - if ($c->offset + $pos <= $c->length - 1) { | |
| 700 | - break; | |
| 701 | - } else { | |
| 702 | - // If the script reaches this point, | |
| 703 | - // the token may span beyond the end | |
| 704 | - // of the current buffer. Therefore, | |
| 705 | - // we increase the size of the buffer | |
| 706 | - // and try again--just to be safe. | |
| 707 | - | |
| 708 | - $c->increase_length(); | |
| 709 | - } | |
| 710 | - } | |
| 711 | - | |
| 712 | - $result = substr($c->buffer, $c->offset - 1, $pos + 1); | |
| 713 | - | |
| 714 | - $c->offset += $pos; | |
| 715 | - return $result; | |
| 716 | - } | |
| 717 | - } | |
| 718 | - } | |
| 719 | -} | |
| 1 | +<?php | |
| 2 | +// | |
| 3 | +// FPDI - Version 1.4.2 | |
| 4 | +// | |
| 5 | +// Copyright 2004-2011 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 (!defined ('PDF_TYPE_NULL')) | |
| 21 | + define ('PDF_TYPE_NULL', 0); | |
| 22 | +if (!defined ('PDF_TYPE_NUMERIC')) | |
| 23 | + define ('PDF_TYPE_NUMERIC', 1); | |
| 24 | +if (!defined ('PDF_TYPE_TOKEN')) | |
| 25 | + define ('PDF_TYPE_TOKEN', 2); | |
| 26 | +if (!defined ('PDF_TYPE_HEX')) | |
| 27 | + define ('PDF_TYPE_HEX', 3); | |
| 28 | +if (!defined ('PDF_TYPE_STRING')) | |
| 29 | + define ('PDF_TYPE_STRING', 4); | |
| 30 | +if (!defined ('PDF_TYPE_DICTIONARY')) | |
| 31 | + define ('PDF_TYPE_DICTIONARY', 5); | |
| 32 | +if (!defined ('PDF_TYPE_ARRAY')) | |
| 33 | + define ('PDF_TYPE_ARRAY', 6); | |
| 34 | +if (!defined ('PDF_TYPE_OBJDEC')) | |
| 35 | + define ('PDF_TYPE_OBJDEC', 7); | |
| 36 | +if (!defined ('PDF_TYPE_OBJREF')) | |
| 37 | + define ('PDF_TYPE_OBJREF', 8); | |
| 38 | +if (!defined ('PDF_TYPE_OBJECT')) | |
| 39 | + define ('PDF_TYPE_OBJECT', 9); | |
| 40 | +if (!defined ('PDF_TYPE_STREAM')) | |
| 41 | + define ('PDF_TYPE_STREAM', 10); | |
| 42 | +if (!defined ('PDF_TYPE_BOOLEAN')) | |
| 43 | + define ('PDF_TYPE_BOOLEAN', 11); | |
| 44 | +if (!defined ('PDF_TYPE_REAL')) | |
| 45 | + define ('PDF_TYPE_REAL', 12); | |
| 46 | + | |
| 47 | +require_once( USCES_PLUGIN_DIR . '/pdf/fpdi/pdf_context.php'); | |
| 48 | + | |
| 49 | +if (!class_exists('pdf_parser', false)) { | |
| 50 | + | |
| 51 | + class pdf_parser { | |
| 52 | + | |
| 53 | + /** | |
| 54 | + * Filename | |
| 55 | + * @var string | |
| 56 | + */ | |
| 57 | + var $filename; | |
| 58 | + | |
| 59 | + /** | |
| 60 | + * File resource | |
| 61 | + * @var resource | |
| 62 | + */ | |
| 63 | + var $f; | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * PDF Context | |
| 67 | + * @var object pdf_context-Instance | |
| 68 | + */ | |
| 69 | + var $c; | |
| 70 | + | |
| 71 | + /** | |
| 72 | + * xref-Data | |
| 73 | + * @var array | |
| 74 | + */ | |
| 75 | + var $xref; | |
| 76 | + | |
| 77 | + /** | |
| 78 | + * root-Object | |
| 79 | + * @var array | |
| 80 | + */ | |
| 81 | + var $root; | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * PDF version of the loaded document | |
| 85 | + * @var string | |
| 86 | + */ | |
| 87 | + var $pdfVersion; | |
| 88 | + | |
| 89 | + /** | |
| 90 | + * For reading encrypted documents and xref/objectstreams are in use | |
| 91 | + * | |
| 92 | + * @var boolean | |
| 93 | + */ | |
| 94 | + var $readPlain = true; | |
| 95 | + | |
| 96 | + /** | |
| 97 | + * Constructor | |
| 98 | + * | |
| 99 | + * @param string $filename Source-Filename | |
| 100 | + */ | |
| 101 | + function pdf_parser($filename) { | |
| 102 | + $this->filename = $filename; | |
| 103 | + | |
| 104 | + $this->f = @fopen($this->filename, 'rb'); | |
| 105 | + | |
| 106 | + if (!$this->f) | |
| 107 | + $this->error(sprintf('Cannot open %s !', $filename)); | |
| 108 | + | |
| 109 | + $this->getPDFVersion(); | |
| 110 | + | |
| 111 | + $this->c = new pdf_context($this->f); | |
| 112 | + | |
| 113 | + // Read xref-Data | |
| 114 | + $this->xref = array(); | |
| 115 | + $this->pdf_read_xref($this->xref, $this->pdf_find_xref()); | |
| 116 | + | |
| 117 | + // Check for Encryption | |
| 118 | + $this->getEncryption(); | |
| 119 | + | |
| 120 | + // Read root | |
| 121 | + $this->pdf_read_root(); | |
| 122 | + } | |
| 123 | + | |
| 124 | + /** | |
| 125 | + * Close the opened file | |
| 126 | + */ | |
| 127 | + function closeFile() { | |
| 128 | + if (isset($this->f) && is_resource($this->f)) { | |
| 129 | + fclose($this->f); | |
| 130 | + unset($this->f); | |
| 131 | + } | |
| 132 | + } | |
| 133 | + | |
| 134 | + /** | |
| 135 | + * Print Error and die | |
| 136 | + * | |
| 137 | + * @param string $msg Error-Message | |
| 138 | + */ | |
| 139 | + function error($msg) { | |
| 140 | + die('<b>PDF-Parser Error:</b> ' . $msg); | |
| 141 | + } | |
| 142 | + | |
| 143 | + /** | |
| 144 | + * Check Trailer for Encryption | |
| 145 | + */ | |
| 146 | + function getEncryption() { | |
| 147 | + if (isset($this->xref['trailer'][1]['/Encrypt'])) { | |
| 148 | + $this->error('File is encrypted!'); | |
| 149 | + } | |
| 150 | + } | |
| 151 | + | |
| 152 | + /** | |
| 153 | + * Find/Return /Root | |
| 154 | + * | |
| 155 | + * @return array | |
| 156 | + */ | |
| 157 | + function pdf_find_root() { | |
| 158 | + if ($this->xref['trailer'][1]['/Root'][0] != PDF_TYPE_OBJREF) { | |
| 159 | + $this->error('Wrong Type of Root-Element! Must be an indirect reference'); | |
| 160 | + } | |
| 161 | + | |
| 162 | + return $this->xref['trailer'][1]['/Root']; | |
| 163 | + } | |
| 164 | + | |
| 165 | + /** | |
| 166 | + * Read the /Root | |
| 167 | + */ | |
| 168 | + function pdf_read_root() { | |
| 169 | + // read root | |
| 170 | + $this->root = $this->pdf_resolve_object($this->c, $this->pdf_find_root()); | |
| 171 | + } | |
| 172 | + | |
| 173 | + /** | |
| 174 | + * Get PDF-Version | |
| 175 | + * | |
| 176 | + * And reset the PDF Version used in FPDI if needed | |
| 177 | + */ | |
| 178 | + function getPDFVersion() { | |
| 179 | + fseek($this->f, 0); | |
| 180 | + preg_match('/\d\.\d/',fread($this->f, 16), $m); | |
| 181 | + if (isset($m[0])) | |
| 182 | + $this->pdfVersion = $m[0]; | |
| 183 | + return $this->pdfVersion; | |
| 184 | + } | |
| 185 | + | |
| 186 | + /** | |
| 187 | + * Find the xref-Table | |
| 188 | + */ | |
| 189 | + function pdf_find_xref() { | |
| 190 | + $toRead = 1500; | |
| 191 | + | |
| 192 | + $stat = fseek ($this->f, -$toRead, SEEK_END); | |
| 193 | + if ($stat === -1) { | |
| 194 | + fseek ($this->f, 0); | |
| 195 | + } | |
| 196 | + $data = fread($this->f, $toRead); | |
| 197 | + | |
| 198 | + $pos = strlen($data) - strpos(strrev($data), strrev('startxref')); | |
| 199 | + $data = substr($data, $pos); | |
| 200 | + | |
| 201 | + if (!preg_match('/\s*(\d+).*$/s', $data, $matches)) { | |
| 202 | + $this->error('Unable to find pointer to xref table'); | |
| 203 | + } | |
| 204 | + | |
| 205 | + return (int) $matches[1]; | |
| 206 | + } | |
| 207 | + | |
| 208 | + /** | |
| 209 | + * Read xref-table | |
| 210 | + * | |
| 211 | + * @param array $result Array of xref-table | |
| 212 | + * @param integer $offset of xref-table | |
| 213 | + */ | |
| 214 | + function pdf_read_xref(&$result, $offset) { | |
| 215 | + $o_pos = $offset-min(20, $offset); | |
| 216 | + fseek($this->f, $o_pos); // set some bytes backwards to fetch errorious docs | |
| 217 | + | |
| 218 | + $data = fread($this->f, 100); | |
| 219 | + | |
| 220 | + $xrefPos = strrpos($data, 'xref'); | |
| 221 | + | |
| 222 | + if ($xrefPos === false) { | |
| 223 | + fseek($this->f, $offset); | |
| 224 | + $c = new pdf_context($this->f); | |
| 225 | + $xrefStreamObjDec = $this->pdf_read_value($c); | |
| 226 | + | |
| 227 | + if (is_array($xrefStreamObjDec) && isset($xrefStreamObjDec[0]) && $xrefStreamObjDec[0] == PDF_TYPE_OBJDEC) { | |
| 228 | + $this->error(sprintf('This document (%s) probably uses a compression technique which is not supported by the free parser shipped with FPDI.', $this->filename)); | |
| 229 | + } else { | |
| 230 | + $this->error('Unable to find xref table.'); | |
| 231 | + } | |
| 232 | + } | |
| 233 | + | |
| 234 | + if (!isset($result['xref_location'])) { | |
| 235 | + $result['xref_location'] = $o_pos + $xrefPos; | |
| 236 | + $result['max_object'] = 0; | |
| 237 | + } | |
| 238 | + | |
| 239 | + $cylces = -1; | |
| 240 | + $bytesPerCycle = 100; | |
| 241 | + | |
| 242 | + fseek($this->f, $o_pos = $o_pos + $xrefPos + 4); // set the handle directly after the "xref"-keyword | |
| 243 | + $data = fread($this->f, $bytesPerCycle); | |
| 244 | + | |
| 245 | + while (($trailerPos = strpos($data, 'trailer', max($bytesPerCycle * $cylces++, 0))) === false && !feof($this->f)) { | |
| 246 | + $data .= fread($this->f, $bytesPerCycle); | |
| 247 | + } | |
| 248 | + | |
| 249 | + if ($trailerPos === false) { | |
| 250 | + $this->error('Trailer keyword not found after xref table'); | |
| 251 | + } | |
| 252 | + | |
| 253 | + $data = substr($data, 0, $trailerPos); | |
| 254 | + | |
| 255 | + // get Line-Ending | |
| 256 | + preg_match_all("/(\r\n|\n|\r)/", substr($data, 0, 100), $m); // check the first 100 bytes for linebreaks | |
| 257 | + | |
| 258 | + $differentLineEndings = count(array_unique($m[0])); | |
| 259 | + if ($differentLineEndings > 1) { | |
| 260 | + $lines = preg_split("/(\r\n|\n|\r)/", $data, -1, PREG_SPLIT_NO_EMPTY); | |
| 261 | + } else { | |
| 262 | + $lines = explode($m[0][1], $data); | |
| 263 | + } | |
| 264 | + | |
| 265 | + $data = $differentLineEndings = $m = null; | |
| 266 | + unset($data, $differentLineEndings, $m); | |
| 267 | + | |
| 268 | + $linesCount = count($lines); | |
| 269 | + | |
| 270 | + $start = 1; | |
| 271 | + | |
| 272 | + for ($i = 0; $i < $linesCount; $i++) { | |
| 273 | + $line = trim($lines[$i]); | |
| 274 | + if ($line) { | |
| 275 | + $pieces = explode(' ', $line); | |
| 276 | + $c = count($pieces); | |
| 277 | + switch($c) { | |
| 278 | + case 2: | |
| 279 | + $start = (int)$pieces[0]; | |
| 280 | + $end = $start + (int)$pieces[1]; | |
| 281 | + if ($end > $result['max_object']) | |
| 282 | + $result['max_object'] = $end; | |
| 283 | + break; | |
| 284 | + case 3: | |
| 285 | + if (!isset($result['xref'][$start])) | |
| 286 | + $result['xref'][$start] = array(); | |
| 287 | + | |
| 288 | + if (!array_key_exists($gen = (int) $pieces[1], $result['xref'][$start])) { | |
| 289 | + $result['xref'][$start][$gen] = $pieces[2] == 'n' ? (int) $pieces[0] : null; | |
| 290 | + } | |
| 291 | + $start++; | |
| 292 | + break; | |
| 293 | + default: | |
| 294 | + $this->error('Unexpected data in xref table'); | |
| 295 | + } | |
| 296 | + } | |
| 297 | + } | |
| 298 | + | |
| 299 | + $lines = $pieces = $line = $start = $end = $gen = null; | |
| 300 | + unset($lines, $pieces, $line, $start, $end, $gen); | |
| 301 | + | |
| 302 | + fseek($this->f, $o_pos + $trailerPos + 7); | |
| 303 | + | |
| 304 | + $c = new pdf_context($this->f); | |
| 305 | + $trailer = $this->pdf_read_value($c); | |
| 306 | + | |
| 307 | + $c = null; | |
| 308 | + unset($c); | |
| 309 | + | |
| 310 | + if (!isset($result['trailer'])) { | |
| 311 | + $result['trailer'] = $trailer; | |
| 312 | + } | |
| 313 | + | |
| 314 | + if (isset($trailer[1]['/Prev'])) { | |
| 315 | + $this->pdf_read_xref($result, $trailer[1]['/Prev'][1]); | |
| 316 | + } | |
| 317 | + | |
| 318 | + $trailer = null; | |
| 319 | + unset($trailer); | |
| 320 | + | |
| 321 | + return true; | |
| 322 | + } | |
| 323 | + | |
| 324 | + /** | |
| 325 | + * Reads an Value | |
| 326 | + * | |
| 327 | + * @param object $c pdf_context | |
| 328 | + * @param string $token a Token | |
| 329 | + * @return mixed | |
| 330 | + */ | |
| 331 | + function pdf_read_value(&$c, $token = null) { | |
| 332 | + if (is_null($token)) { | |
| 333 | + $token = $this->pdf_read_token($c); | |
| 334 | + } | |
| 335 | + | |
| 336 | + if ($token === false) { | |
| 337 | + return false; | |
| 338 | + } | |
| 339 | + | |
| 340 | + switch ($token) { | |
| 341 | + case '<': | |
| 342 | + // This is a hex string. | |
| 343 | + // Read the value, then the terminator | |
| 344 | + | |
| 345 | + $pos = $c->offset; | |
| 346 | + | |
| 347 | + while(1) { | |
| 348 | + | |
| 349 | + $match = strpos ($c->buffer, '>', $pos); | |
| 350 | + | |
| 351 | + // If you can't find it, try | |
| 352 | + // reading more data from the stream | |
| 353 | + | |
| 354 | + if ($match === false) { | |
| 355 | + if (!$c->increase_length()) { | |
| 356 | + return false; | |
| 357 | + } else { | |
| 358 | + continue; | |
| 359 | + } | |
| 360 | + } | |
| 361 | + | |
| 362 | + $result = substr ($c->buffer, $c->offset, $match - $c->offset); | |
| 363 | + $c->offset = $match + 1; | |
| 364 | + | |
| 365 | + return array (PDF_TYPE_HEX, $result); | |
| 366 | + } | |
| 367 | + | |
| 368 | + break; | |
| 369 | + case '<<': | |
| 370 | + // This is a dictionary. | |
| 371 | + | |
| 372 | + $result = array(); | |
| 373 | + | |
| 374 | + // Recurse into this function until we reach | |
| 375 | + // the end of the dictionary. | |
| 376 | + while (($key = $this->pdf_read_token($c)) !== '>>') { | |
| 377 | + if ($key === false) { | |
| 378 | + return false; | |
| 379 | + } | |
| 380 | + | |
| 381 | + if (($value = $this->pdf_read_value($c)) === false) { | |
| 382 | + return false; | |
| 383 | + } | |
| 384 | + | |
| 385 | + // Catch missing value | |
| 386 | + if ($value[0] == PDF_TYPE_TOKEN && $value[1] == '>>') { | |
| 387 | + $result[$key] = array(PDF_TYPE_NULL); | |
| 388 | + break; | |
| 389 | + } | |
| 390 | + | |
| 391 | + $result[$key] = $value; | |
| 392 | + } | |
| 393 | + | |
| 394 | + return array (PDF_TYPE_DICTIONARY, $result); | |
| 395 | + | |
| 396 | + case '[': | |
| 397 | + // This is an array. | |
| 398 | + | |
| 399 | + $result = array(); | |
| 400 | + | |
| 401 | + // Recurse into this function until we reach | |
| 402 | + // the end of the array. | |
| 403 | + while (($token = $this->pdf_read_token($c)) !== ']') { | |
| 404 | + if ($token === false) { | |
| 405 | + return false; | |
| 406 | + } | |
| 407 | + | |
| 408 | + if (($value = $this->pdf_read_value($c, $token)) === false) { | |
| 409 | + return false; | |
| 410 | + } | |
| 411 | + | |
| 412 | + $result[] = $value; | |
| 413 | + } | |
| 414 | + | |
| 415 | + return array (PDF_TYPE_ARRAY, $result); | |
| 416 | + | |
| 417 | + case '(' : | |
| 418 | + // This is a string | |
| 419 | + $pos = $c->offset; | |
| 420 | + | |
| 421 | + $openBrackets = 1; | |
| 422 | + do { | |
| 423 | + for (; $openBrackets != 0 && $pos < $c->length; $pos++) { | |
| 424 | + switch (ord($c->buffer[$pos])) { | |
| 425 | + case 0x28: // '(' | |
| 426 | + $openBrackets++; | |
| 427 | + break; | |
| 428 | + case 0x29: // ')' | |
| 429 | + $openBrackets--; | |
| 430 | + break; | |
| 431 | + case 0x5C: // backslash | |
| 432 | + $pos++; | |
| 433 | + } | |
| 434 | + } | |
| 435 | + } while($openBrackets != 0 && $c->increase_length()); | |
| 436 | + | |
| 437 | + $result = substr($c->buffer, $c->offset, $pos - $c->offset - 1); | |
| 438 | + $c->offset = $pos; | |
| 439 | + | |
| 440 | + return array (PDF_TYPE_STRING, $result); | |
| 441 | + | |
| 442 | + case 'stream': | |
| 443 | + $o_pos = ftell($c->file)-strlen($c->buffer); | |
| 444 | + $o_offset = $c->offset; | |
| 445 | + | |
| 446 | + $c->reset($startpos = $o_pos + $o_offset); | |
| 447 | + | |
| 448 | + $e = 0; // ensure line breaks in front of the stream | |
| 449 | + if ($c->buffer[0] == chr(10) || $c->buffer[0] == chr(13)) | |
| 450 | + $e++; | |
| 451 | + if ($c->buffer[1] == chr(10) && $c->buffer[0] != chr(10)) | |
| 452 | + $e++; | |
| 453 | + | |
| 454 | + if ($this->actual_obj[1][1]['/Length'][0] == PDF_TYPE_OBJREF) { | |
| 455 | + $tmp_c = new pdf_context($this->f); | |
| 456 | + $tmp_length = $this->pdf_resolve_object($tmp_c, $this->actual_obj[1][1]['/Length']); | |
| 457 | + $length = $tmp_length[1][1]; | |
| 458 | + } else { | |
| 459 | + $length = $this->actual_obj[1][1]['/Length'][1]; | |
| 460 | + } | |
| 461 | + | |
| 462 | + if ($length > 0) { | |
| 463 | + $c->reset($startpos + $e,$length); | |
| 464 | + $v = $c->buffer; | |
| 465 | + } else { | |
| 466 | + $v = ''; | |
| 467 | + } | |
| 468 | + $c->reset($startpos + $e + $length + 9); // 9 = strlen("endstream") | |
| 469 | + | |
| 470 | + return array(PDF_TYPE_STREAM, $v); | |
| 471 | + | |
| 472 | + default : | |
| 473 | + if (is_numeric ($token)) { | |
| 474 | + // A numeric token. Make sure that | |
| 475 | + // it is not part of something else. | |
| 476 | + if (($tok2 = $this->pdf_read_token ($c)) !== false) { | |
| 477 | + if (is_numeric ($tok2)) { | |
| 478 | + | |
| 479 | + // Two numeric tokens in a row. | |
| 480 | + // In this case, we're probably in | |
| 481 | + // front of either an object reference | |
| 482 | + // or an object specification. | |
| 483 | + // Determine the case and return the data | |
| 484 | + if (($tok3 = $this->pdf_read_token ($c)) !== false) { | |
| 485 | + switch ($tok3) { | |
| 486 | + case 'obj': | |
| 487 | + return array (PDF_TYPE_OBJDEC, (int) $token, (int) $tok2); | |
| 488 | + case 'R': | |
| 489 | + return array (PDF_TYPE_OBJREF, (int) $token, (int) $tok2); | |
| 490 | + } | |
| 491 | + // If we get to this point, that numeric value up | |
| 492 | + // there was just a numeric value. Push the extra | |
| 493 | + // tokens back into the stack and return the value. | |
| 494 | + array_push ($c->stack, $tok3); | |
| 495 | + } | |
| 496 | + } | |
| 497 | + | |
| 498 | + array_push ($c->stack, $tok2); | |
| 499 | + } | |
| 500 | + | |
| 501 | + if ($token === (string)((int)$token)) | |
| 502 | + return array (PDF_TYPE_NUMERIC, (int)$token); | |
| 503 | + else | |
| 504 | + return array (PDF_TYPE_REAL, (float)$token); | |
| 505 | + } else if ($token == 'true' || $token == 'false') { | |
| 506 | + return array (PDF_TYPE_BOOLEAN, $token == 'true'); | |
| 507 | + } else if ($token == 'null') { | |
| 508 | + return array (PDF_TYPE_NULL); | |
| 509 | + } else { | |
| 510 | + // Just a token. Return it. | |
| 511 | + return array (PDF_TYPE_TOKEN, $token); | |
| 512 | + } | |
| 513 | + } | |
| 514 | + } | |
| 515 | + | |
| 516 | + /** | |
| 517 | + * Resolve an object | |
| 518 | + * | |
| 519 | + * @param object $c pdf_context | |
| 520 | + * @param array $obj_spec The object-data | |
| 521 | + * @param boolean $encapsulate Must set to true, cause the parsing and fpdi use this method only without this para | |
| 522 | + */ | |
| 523 | + function pdf_resolve_object(&$c, $obj_spec, $encapsulate = true) { | |
| 524 | + // Exit if we get invalid data | |
| 525 | + if (!is_array($obj_spec)) { | |
| 526 | + $ret = false; | |
| 527 | + return $ret; | |
| 528 | + } | |
| 529 | + | |
| 530 | + if ($obj_spec[0] == PDF_TYPE_OBJREF) { | |
| 531 | + | |
| 532 | + // This is a reference, resolve it | |
| 533 | + if (isset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]])) { | |
| 534 | + | |
| 535 | + // Save current file position | |
| 536 | + // This is needed if you want to resolve | |
| 537 | + // references while you're reading another object | |
| 538 | + // (e.g.: if you need to determine the length | |
| 539 | + // of a stream) | |
| 540 | + | |
| 541 | + $old_pos = ftell($c->file); | |
| 542 | + | |
| 543 | + // Reposition the file pointer and | |
| 544 | + // load the object header. | |
| 545 | + | |
| 546 | + $c->reset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]]); | |
| 547 | + | |
| 548 | + $header = $this->pdf_read_value($c); | |
| 549 | + | |
| 550 | + if ($header[0] != PDF_TYPE_OBJDEC || $header[1] != $obj_spec[1] || $header[2] != $obj_spec[2]) { | |
| 551 | + $toSearchFor = $obj_spec[1] . ' ' . $obj_spec[2] . ' obj'; | |
| 552 | + if (preg_match('/' . $toSearchFor . '/', $c->buffer)) { | |
| 553 | + $c->offset = strpos($c->buffer, $toSearchFor) + strlen($toSearchFor); | |
| 554 | + // reset stack | |
| 555 | + $c->stack = array(); | |
| 556 | + } else { | |
| 557 | + $this->error("Unable to find object ({$obj_spec[1]}, {$obj_spec[2]}) at expected location"); | |
| 558 | + } | |
| 559 | + } | |
| 560 | + | |
| 561 | + // If we're being asked to store all the information | |
| 562 | + // about the object, we add the object ID and generation | |
| 563 | + // number for later use | |
| 564 | + $result = array(); | |
| 565 | + $this->actual_obj =& $result; | |
| 566 | + if ($encapsulate) { | |
| 567 | + $result = array ( | |
| 568 | + PDF_TYPE_OBJECT, | |
| 569 | + 'obj' => $obj_spec[1], | |
| 570 | + 'gen' => $obj_spec[2] | |
| 571 | + ); | |
| 572 | + } | |
| 573 | + | |
| 574 | + // Now simply read the object data until | |
| 575 | + // we encounter an end-of-object marker | |
| 576 | + while(1) { | |
| 577 | + $value = $this->pdf_read_value($c); | |
| 578 | + if ($value === false || count($result) > 4) { | |
| 579 | + // in this case the parser coudn't find an endobj so we break here | |
| 580 | + break; | |
| 581 | + } | |
| 582 | + | |
| 583 | + if ($value[0] == PDF_TYPE_TOKEN && $value[1] === 'endobj') { | |
| 584 | + break; | |
| 585 | + } | |
| 586 | + | |
| 587 | + $result[] = $value; | |
| 588 | + } | |
| 589 | + | |
| 590 | + $c->reset($old_pos); | |
| 591 | + | |
| 592 | + if (isset($result[2][0]) && $result[2][0] == PDF_TYPE_STREAM) { | |
| 593 | + $result[0] = PDF_TYPE_STREAM; | |
| 594 | + } | |
| 595 | + | |
| 596 | + return $result; | |
| 597 | + } | |
| 598 | + } else { | |
| 599 | + return $obj_spec; | |
| 600 | + } | |
| 601 | + } | |
| 602 | + | |
| 603 | + | |
| 604 | + | |
| 605 | + /** | |
| 606 | + * Reads a token from the file | |
| 607 | + * | |
| 608 | + * @param object $c pdf_context | |
| 609 | + * @return mixed | |
| 610 | + */ | |
| 611 | + function pdf_read_token(&$c) | |
| 612 | + { | |
| 613 | + // If there is a token available | |
| 614 | + // on the stack, pop it out and | |
| 615 | + // return it. | |
| 616 | + | |
| 617 | + if (count($c->stack)) { | |
| 618 | + return array_pop($c->stack); | |
| 619 | + } | |
| 620 | + | |
| 621 | + // Strip away any whitespace | |
| 622 | + | |
| 623 | + do { | |
| 624 | + if (!$c->ensure_content()) { | |
| 625 | + return false; | |
| 626 | + } | |
| 627 | + $c->offset += strspn($c->buffer, " \n\r\t", $c->offset); | |
| 628 | + } while ($c->offset >= $c->length - 1); | |
| 629 | + | |
| 630 | + // Get the first character in the stream | |
| 631 | + | |
| 632 | + $char = $c->buffer[$c->offset++]; | |
| 633 | + | |
| 634 | + switch ($char) { | |
| 635 | + | |
| 636 | + case '[': | |
| 637 | + case ']': | |
| 638 | + case '(': | |
| 639 | + case ')': | |
| 640 | + | |
| 641 | + // This is either an array or literal string | |
| 642 | + // delimiter, Return it | |
| 643 | + | |
| 644 | + return $char; | |
| 645 | + | |
| 646 | + case '<': | |
| 647 | + case '>': | |
| 648 | + | |
| 649 | + // This could either be a hex string or | |
| 650 | + // dictionary delimiter. Determine the | |
| 651 | + // appropriate case and return the token | |
| 652 | + | |
| 653 | + if ($c->buffer[$c->offset] == $char) { | |
| 654 | + if (!$c->ensure_content()) { | |
| 655 | + return false; | |
| 656 | + } | |
| 657 | + $c->offset++; | |
| 658 | + return $char . $char; | |
| 659 | + } else { | |
| 660 | + return $char; | |
| 661 | + } | |
| 662 | + | |
| 663 | + case '%': | |
| 664 | + | |
| 665 | + // This is a comment - jump over it! | |
| 666 | + | |
| 667 | + $pos = $c->offset; | |
| 668 | + while(1) { | |
| 669 | + $match = preg_match("/(\r\n|\r|\n)/", $c->buffer, $m, PREG_OFFSET_CAPTURE, $pos); | |
| 670 | + if ($match === 0) { | |
| 671 | + if (!$c->increase_length()) { | |
| 672 | + return false; | |
| 673 | + } else { | |
| 674 | + continue; | |
| 675 | + } | |
| 676 | + } | |
| 677 | + | |
| 678 | + $c->offset = $m[0][1]+strlen($m[0][0]); | |
| 679 | + | |
| 680 | + return $this->pdf_read_token($c); | |
| 681 | + } | |
| 682 | + | |
| 683 | + default: | |
| 684 | + | |
| 685 | + // This is "another" type of token (probably | |
| 686 | + // a dictionary entry or a numeric value) | |
| 687 | + // Find the end and return it. | |
| 688 | + | |
| 689 | + if (!$c->ensure_content()) { | |
| 690 | + return false; | |
| 691 | + } | |
| 692 | + | |
| 693 | + while(1) { | |
| 694 | + | |
| 695 | + // Determine the length of the token | |
| 696 | + | |
| 697 | + $pos = strcspn($c->buffer, " %[]<>()\r\n\t/", $c->offset); | |
| 698 | + | |
| 699 | + if ($c->offset + $pos <= $c->length - 1) { | |
| 700 | + break; | |
| 701 | + } else { | |
| 702 | + // If the script reaches this point, | |
| 703 | + // the token may span beyond the end | |
| 704 | + // of the current buffer. Therefore, | |
| 705 | + // we increase the size of the buffer | |
| 706 | + // and try again--just to be safe. | |
| 707 | + | |
| 708 | + $c->increase_length(); | |
| 709 | + } | |
| 710 | + } | |
| 711 | + | |
| 712 | + $result = substr($c->buffer, $c->offset - 1, $pos + 1); | |
| 713 | + | |
| 714 | + $c->offset += $pos; | |
| 715 | + return $result; | |
| 716 | + } | |
| 717 | + } | |
| 718 | + } | |
| 719 | +} | |
