| @@ -1,660 +1,660 @@ | ||
| 1 | -<?php | |
| 2 | -// | |
| 3 | -// FPDI - Version 1.2 | |
| 4 | -// | |
| 5 | -// Copyright 2004-2007 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 | - | |
| 43 | -require_once(USCES_PLUGIN_DIR.'/classes/fpdf/pdf_context.php'); | |
| 44 | -require_once(USCES_PLUGIN_DIR.'/classes/fpdf/wrapper_functions.php'); | |
| 45 | - | |
| 46 | -class pdf_parser { | |
| 47 | - | |
| 48 | - /** | |
| 49 | - * Filename | |
| 50 | - * @var string | |
| 51 | - */ | |
| 52 | - var $filename; | |
| 53 | - | |
| 54 | - /** | |
| 55 | - * File resource | |
| 56 | - * @var resource | |
| 57 | - */ | |
| 58 | - var $f; | |
| 59 | - | |
| 60 | - /** | |
| 61 | - * PDF Context | |
| 62 | - * @var object pdf_context-Instance | |
| 63 | - */ | |
| 64 | - var $c; | |
| 65 | - | |
| 66 | - /** | |
| 67 | - * xref-Data | |
| 68 | - * @var array | |
| 69 | - */ | |
| 70 | - var $xref; | |
| 71 | - | |
| 72 | - /** | |
| 73 | - * root-Object | |
| 74 | - * @var array | |
| 75 | - */ | |
| 76 | - var $root; | |
| 77 | - | |
| 78 | - | |
| 79 | - /** | |
| 80 | - * Constructor | |
| 81 | - * | |
| 82 | - * @param string $filename Source-Filename | |
| 83 | - */ | |
| 84 | - function pdf_parser($filename) { | |
| 85 | - $this->filename = $filename; | |
| 86 | - | |
| 87 | - $this->f = @fopen($this->filename, "rb"); | |
| 88 | - | |
| 89 | - if (!$this->f) | |
| 90 | - $this->error(sprintf("Cannot open %s !", $filename)); | |
| 91 | - | |
| 92 | - $this->getPDFVersion(); | |
| 93 | - | |
| 94 | - $this->c =& new pdf_context($this->f); | |
| 95 | - // Read xref-Data | |
| 96 | - $this->pdf_read_xref($this->xref, $this->pdf_find_xref()); | |
| 97 | - | |
| 98 | - // Check for Encryption | |
| 99 | - $this->getEncryption(); | |
| 100 | - | |
| 101 | - // Read root | |
| 102 | - $this->pdf_read_root(); | |
| 103 | - } | |
| 104 | - | |
| 105 | - /** | |
| 106 | - * Close the opened file | |
| 107 | - */ | |
| 108 | - function closeFile() { | |
| 109 | - if (isset($this->f)) { | |
| 110 | - fclose($this->f); | |
| 111 | - unset($this->f); | |
| 112 | - } | |
| 113 | - } | |
| 114 | - | |
| 115 | - /** | |
| 116 | - * Print Error and die | |
| 117 | - * | |
| 118 | - * @param string $msg Error-Message | |
| 119 | - */ | |
| 120 | - function error($msg) { | |
| 121 | - die("<b>PDF-Parser Error:</b> ".$msg); | |
| 122 | - } | |
| 123 | - | |
| 124 | - /** | |
| 125 | - * Check Trailer for Encryption | |
| 126 | - */ | |
| 127 | - function getEncryption() { | |
| 128 | - if (isset($this->xref['trailer'][1]['/Encrypt'])) { | |
| 129 | - $this->error("File is encrypted!"); | |
| 130 | - } | |
| 131 | - } | |
| 132 | - | |
| 133 | - /** | |
| 134 | - * Find/Return /Root | |
| 135 | - * | |
| 136 | - * @return array | |
| 137 | - */ | |
| 138 | - function pdf_find_root() { | |
| 139 | - if ($this->xref['trailer'][1]['/Root'][0] != PDF_TYPE_OBJREF) { | |
| 140 | - $this->error("Wrong Type of Root-Element! Must be an indirect reference"); | |
| 141 | - } | |
| 142 | - return $this->xref['trailer'][1]['/Root']; | |
| 143 | - } | |
| 144 | - | |
| 145 | - /** | |
| 146 | - * Read the /Root | |
| 147 | - */ | |
| 148 | - function pdf_read_root() { | |
| 149 | - // read root | |
| 150 | - $this->root = $this->pdf_resolve_object($this->c, $this->pdf_find_root()); | |
| 151 | - } | |
| 152 | - | |
| 153 | - /** | |
| 154 | - * Get PDF-Version | |
| 155 | - * | |
| 156 | - * And reset the PDF Version used in FPDI if needed | |
| 157 | - */ | |
| 158 | - function getPDFVersion() { | |
| 159 | - fseek($this->f, 0); | |
| 160 | - preg_match("/\d\.\d/",fread($this->f,16),$m); | |
| 161 | - $this->pdfVersion = $m[0]; | |
| 162 | - } | |
| 163 | - | |
| 164 | - /** | |
| 165 | - * Find the xref-Table | |
| 166 | - */ | |
| 167 | - function pdf_find_xref() { | |
| 168 | - fseek ($this->f, -min(filesize($this->filename),1500), SEEK_END); | |
| 169 | - $data = fread($this->f, 1500); | |
| 170 | - | |
| 171 | - $pos = strlen($data) - strpos(strrev($data), strrev('startxref')); | |
| 172 | - $data = substr($data, $pos); | |
| 173 | - | |
| 174 | - if (!preg_match('/\s*(\d+).*$/s', $data, $matches)) { | |
| 175 | - $this->error("Unable to find pointer to xref table"); | |
| 176 | - } | |
| 177 | - | |
| 178 | - return (int) $matches[1]; | |
| 179 | - } | |
| 180 | - | |
| 181 | - /** | |
| 182 | - * Read xref-table | |
| 183 | - * | |
| 184 | - * @param array $result Array of xref-table | |
| 185 | - * @param integer $offset of xref-table | |
| 186 | - * @param integer $start start-position in xref-table | |
| 187 | - * @param integer $end end-position in xref-table | |
| 188 | - */ | |
| 189 | - function pdf_read_xref(&$result, $offset, $start = null, $end = null) { | |
| 190 | - if (is_null ($start) || is_null ($end)) { | |
| 191 | - fseek($this->f, $o_pos = $offset); | |
| 192 | - $data = trim(fgets($this->f,1024)); | |
| 193 | - | |
| 194 | - if (strlen($data) == 0) | |
| 195 | - $data = trim(fgets($this->f,1024)); | |
| 196 | - | |
| 197 | - if ($data !== 'xref') { | |
| 198 | - fseek($this->f, $o_pos); | |
| 199 | - $data = trim(_fgets($this->f, true)); | |
| 200 | - if ($data !== 'xref') { | |
| 201 | - if (preg_match('/(.*xref)(.*)/m', $data, $m)) { // xref 0 128 - in one line | |
| 202 | - fseek($this->f, $o_pos+strlen($m[1])); | |
| 203 | - } elseif (preg_match('/(x|r|e|f)+/', $data, $m)) { // correct invalid xref-pointer | |
| 204 | - $tmpOffset = $offset-4+strlen($m[0]); | |
| 205 | - $this->pdf_read_xref($result, $tmpOffset, $start, $end); | |
| 206 | - return; | |
| 207 | - } else { | |
| 208 | - $this->error("Unable to find xref table - Maybe a Problem with 'auto_detect_line_endings'"); | |
| 209 | - } | |
| 210 | - } | |
| 211 | - } | |
| 212 | - | |
| 213 | - $o_pos = ftell($this->f); | |
| 214 | - $data = explode(' ', trim(fgets($this->f,1024))); | |
| 215 | - if (count($data) != 2) { | |
| 216 | - fseek($this->f, $o_pos); | |
| 217 | - $data = explode(' ', trim(_fgets($this->f, true))); | |
| 218 | - | |
| 219 | - if (count($data) != 2) { | |
| 220 | - if (count($data) > 2) { // no lineending | |
| 221 | - $n_pos = $o_pos+strlen($data[0])+strlen($data[1])+2; | |
| 222 | - fseek($this->f, $n_pos); | |
| 223 | - } else { | |
| 224 | - $this->error("Unexpected header in xref table"); | |
| 225 | - } | |
| 226 | - } | |
| 227 | - } | |
| 228 | - $start = $data[0]; | |
| 229 | - $end = $start + $data[1]; | |
| 230 | - } | |
| 231 | - | |
| 232 | - if (!isset($result['xref_location'])) { | |
| 233 | - $result['xref_location'] = $offset; | |
| 234 | - } | |
| 235 | - | |
| 236 | - if (!isset($result['max_object']) || $end > $result['max_object']) { | |
| 237 | - $result['max_object'] = $end; | |
| 238 | - } | |
| 239 | - | |
| 240 | - for (; $start < $end; $start++) { | |
| 241 | - $data = ltrim(fread($this->f, 20)); // Spezifications says: 20 bytes including newlines | |
| 242 | - $offset = substr($data, 0, 10); | |
| 243 | - $generation = substr($data, 11, 5); | |
| 244 | - | |
| 245 | - if (!isset ($result['xref'][$start][(int) $generation])) { | |
| 246 | - $result['xref'][$start][(int) $generation] = (int) $offset; | |
| 247 | - } | |
| 248 | - } | |
| 249 | - | |
| 250 | - $o_pos = ftell($this->f); | |
| 251 | - $data = fgets($this->f,1024); | |
| 252 | - if (strlen(trim($data)) == 0) | |
| 253 | - $data = fgets($this->f, 1024); | |
| 254 | - | |
| 255 | - if (preg_match("/trailer/",$data)) { | |
| 256 | - if (preg_match("/(.*trailer[ \n\r]*)/",$data,$m)) { | |
| 257 | - fseek($this->f, $o_pos+strlen($m[1])); | |
| 258 | - } | |
| 259 | - | |
| 260 | - $c =& new pdf_context($this->f); | |
| 261 | - $trailer = $this->pdf_read_value($c); | |
| 262 | - | |
| 263 | - if (isset($trailer[1]['/Prev'])) { | |
| 264 | - $this->pdf_read_xref($result, $trailer[1]['/Prev'][1]); | |
| 265 | - $result['trailer'][1] = array_merge($result['trailer'][1], $trailer[1]); | |
| 266 | - } else { | |
| 267 | - $result['trailer'] = $trailer; | |
| 268 | - } | |
| 269 | - } else { | |
| 270 | - $data = explode(' ', trim($data)); | |
| 271 | - | |
| 272 | - if (count($data) != 2) { | |
| 273 | - fseek($this->f, $o_pos); | |
| 274 | - $data = explode(' ', trim (_fgets ($this->f, true))); | |
| 275 | - | |
| 276 | - if (count($data) != 2) { | |
| 277 | - $this->error("Unexpected data in xref table"); | |
| 278 | - } | |
| 279 | - } | |
| 280 | - | |
| 281 | - $this->pdf_read_xref($result, null, (int) $data[0], (int) $data[0] + (int) $data[1]); | |
| 282 | - } | |
| 283 | - } | |
| 284 | - | |
| 285 | - | |
| 286 | - /** | |
| 287 | - * Reads an Value | |
| 288 | - * | |
| 289 | - * @param object $c pdf_context | |
| 290 | - * @param string $token a Token | |
| 291 | - * @return mixed | |
| 292 | - */ | |
| 293 | - function pdf_read_value(&$c, $token = null) { | |
| 294 | - if (is_null($token)) { | |
| 295 | - $token = $this->pdf_read_token($c); | |
| 296 | - } | |
| 297 | - | |
| 298 | - if ($token === false) { | |
| 299 | - return false; | |
| 300 | - } | |
| 301 | - | |
| 302 | - switch ($token) { | |
| 303 | - case '<': | |
| 304 | - // This is a hex string. | |
| 305 | - // Read the value, then the terminator | |
| 306 | - | |
| 307 | - $pos = $c->offset; | |
| 308 | - | |
| 309 | - while(1) { | |
| 310 | - | |
| 311 | - $match = strpos ($c->buffer, '>', $pos); | |
| 312 | - | |
| 313 | - // If you can't find it, try | |
| 314 | - // reading more data from the stream | |
| 315 | - | |
| 316 | - if ($match === false) { | |
| 317 | - if (!$c->increase_length()) { | |
| 318 | - return false; | |
| 319 | - } else { | |
| 320 | - continue; | |
| 321 | - } | |
| 322 | - } | |
| 323 | - | |
| 324 | - $result = substr ($c->buffer, $c->offset, $match - $c->offset); | |
| 325 | - $c->offset = $match+1; | |
| 326 | - | |
| 327 | - return array (PDF_TYPE_HEX, $result); | |
| 328 | - } | |
| 329 | - | |
| 330 | - break; | |
| 331 | - case '<<': | |
| 332 | - // This is a dictionary. | |
| 333 | - | |
| 334 | - $result = array(); | |
| 335 | - | |
| 336 | - // Recurse into this function until we reach | |
| 337 | - // the end of the dictionary. | |
| 338 | - while (($key = $this->pdf_read_token($c)) !== '>>') { | |
| 339 | - if ($key === false) { | |
| 340 | - return false; | |
| 341 | - } | |
| 342 | - | |
| 343 | - if (($value = $this->pdf_read_value($c)) === false) { | |
| 344 | - return false; | |
| 345 | - } | |
| 346 | - $result[$key] = $value; | |
| 347 | - } | |
| 348 | - | |
| 349 | - return array (PDF_TYPE_DICTIONARY, $result); | |
| 350 | - | |
| 351 | - case '[': | |
| 352 | - // This is an array. | |
| 353 | - | |
| 354 | - $result = array(); | |
| 355 | - | |
| 356 | - // Recurse into this function until we reach | |
| 357 | - // the end of the array. | |
| 358 | - while (($token = $this->pdf_read_token($c)) !== ']') { | |
| 359 | - if ($token === false) { | |
| 360 | - return false; | |
| 361 | - } | |
| 362 | - | |
| 363 | - if (($value = $this->pdf_read_value($c, $token)) === false) { | |
| 364 | - return false; | |
| 365 | - } | |
| 366 | - | |
| 367 | - $result[] = $value; | |
| 368 | - } | |
| 369 | - | |
| 370 | - return array (PDF_TYPE_ARRAY, $result); | |
| 371 | - | |
| 372 | - case '(' : | |
| 373 | - // This is a string | |
| 374 | - | |
| 375 | - $pos = $c->offset; | |
| 376 | - | |
| 377 | - while(1) { | |
| 378 | - | |
| 379 | - // Start by finding the next closed | |
| 380 | - // parenthesis | |
| 381 | - | |
| 382 | - $match = strpos ($c->buffer, ')', $pos); | |
| 383 | - | |
| 384 | - // If you can't find it, try | |
| 385 | - // reading more data from the stream | |
| 386 | - | |
| 387 | - if ($match === false) { | |
| 388 | - if (!$c->increase_length()) { | |
| 389 | - return false; | |
| 390 | - } else { | |
| 391 | - continue; | |
| 392 | - } | |
| 393 | - } | |
| 394 | - | |
| 395 | - // Make sure that there is no backslash | |
| 396 | - // before the parenthesis. If there is, | |
| 397 | - // move on. Otherwise, return the string. | |
| 398 | - $esc = preg_match('/([\\\\]+)$/', $tmpresult = substr($c->buffer, $c->offset, $match - $c->offset), $m); | |
| 399 | - | |
| 400 | - if ($esc === 0 || strlen($m[1]) % 2 == 0) { | |
| 401 | - $result = $tmpresult; | |
| 402 | - $c->offset = $match + 1; | |
| 403 | - return array (PDF_TYPE_STRING, $result); | |
| 404 | - } else { | |
| 405 | - $pos = $match + 1; | |
| 406 | - | |
| 407 | - if ($pos > $c->offset + $c->length) { | |
| 408 | - $c->increase_length(); | |
| 409 | - } | |
| 410 | - } | |
| 411 | - } | |
| 412 | - | |
| 413 | - case "stream": | |
| 414 | - $o_pos = ftell($c->file)-strlen($c->buffer); | |
| 415 | - $o_offset = $c->offset; | |
| 416 | - | |
| 417 | - $c->reset($startpos = $o_pos + $o_offset); | |
| 418 | - | |
| 419 | - $e = 0; // ensure line breaks in front of the stream | |
| 420 | - if ($c->buffer[0] == chr(10) || $c->buffer[0] == chr(13)) | |
| 421 | - $e++; | |
| 422 | - if ($c->buffer[1] == chr(10) && $c->buffer[0] != chr(10)) | |
| 423 | - $e++; | |
| 424 | - | |
| 425 | - if ($this->actual_obj[1][1]['/Length'][0] == PDF_TYPE_OBJREF) { | |
| 426 | - $tmp_c =& new pdf_context($this->f); | |
| 427 | - $tmp_length = $this->pdf_resolve_object($tmp_c,$this->actual_obj[1][1]['/Length']); | |
| 428 | - $length = $tmp_length[1][1]; | |
| 429 | - } else { | |
| 430 | - $length = $this->actual_obj[1][1]['/Length'][1]; | |
| 431 | - } | |
| 432 | - | |
| 433 | - if ($length > 0) { | |
| 434 | - $c->reset($startpos+$e,$length); | |
| 435 | - $v = $c->buffer; | |
| 436 | - } else { | |
| 437 | - $v = ''; | |
| 438 | - } | |
| 439 | - $c->reset($startpos+$e+$length+9); // 9 = strlen("endstream") | |
| 440 | - | |
| 441 | - return array(PDF_TYPE_STREAM, $v); | |
| 442 | - | |
| 443 | - default : | |
| 444 | - if (is_numeric ($token)) { | |
| 445 | - // A numeric token. Make sure that | |
| 446 | - // it is not part of something else. | |
| 447 | - if (($tok2 = $this->pdf_read_token ($c)) !== false) { | |
| 448 | - if (is_numeric ($tok2)) { | |
| 449 | - | |
| 450 | - // Two numeric tokens in a row. | |
| 451 | - // In this case, we're probably in | |
| 452 | - // front of either an object reference | |
| 453 | - // or an object specification. | |
| 454 | - // Determine the case and return the data | |
| 455 | - if (($tok3 = $this->pdf_read_token ($c)) !== false) { | |
| 456 | - switch ($tok3) { | |
| 457 | - case 'obj' : | |
| 458 | - return array (PDF_TYPE_OBJDEC, (int) $token, (int) $tok2); | |
| 459 | - case 'R' : | |
| 460 | - return array (PDF_TYPE_OBJREF, (int) $token, (int) $tok2); | |
| 461 | - } | |
| 462 | - // If we get to this point, that numeric value up | |
| 463 | - // there was just a numeric value. Push the extra | |
| 464 | - // tokens back into the stack and return the value. | |
| 465 | - array_push ($c->stack, $tok3); | |
| 466 | - } | |
| 467 | - } | |
| 468 | - | |
| 469 | - array_push ($c->stack, $tok2); | |
| 470 | - } | |
| 471 | - | |
| 472 | - return array (PDF_TYPE_NUMERIC, $token); | |
| 473 | - } else { | |
| 474 | - | |
| 475 | - // Just a token. Return it. | |
| 476 | - return array (PDF_TYPE_TOKEN, $token); | |
| 477 | - } | |
| 478 | - | |
| 479 | - } | |
| 480 | - } | |
| 481 | - | |
| 482 | - /** | |
| 483 | - * Resolve an object | |
| 484 | - * | |
| 485 | - * @param object $c pdf_context | |
| 486 | - * @param array $obj_spec The object-data | |
| 487 | - * @param boolean $encapsulate Must set to true, cause the parsing and fpdi use this method only without this para | |
| 488 | - */ | |
| 489 | - function pdf_resolve_object(&$c, $obj_spec, $encapsulate = true) { | |
| 490 | - // Exit if we get invalid data | |
| 491 | - if (!is_array($obj_spec)) { | |
| 492 | - return false; | |
| 493 | - } | |
| 494 | - | |
| 495 | - if ($obj_spec[0] == PDF_TYPE_OBJREF) { | |
| 496 | - | |
| 497 | - // This is a reference, resolve it | |
| 498 | - if (isset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]])) { | |
| 499 | - | |
| 500 | - // Save current file position | |
| 501 | - // This is needed if you want to resolve | |
| 502 | - // references while you're reading another object | |
| 503 | - // (e.g.: if you need to determine the length | |
| 504 | - // of a stream) | |
| 505 | - | |
| 506 | - $old_pos = ftell($c->file); | |
| 507 | - | |
| 508 | - // Reposition the file pointer and | |
| 509 | - // load the object header. | |
| 510 | - | |
| 511 | - $c->reset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]]); | |
| 512 | - | |
| 513 | - $header = $this->pdf_read_value($c,null,true); | |
| 514 | - | |
| 515 | - if ($header[0] != PDF_TYPE_OBJDEC || $header[1] != $obj_spec[1] || $header[2] != $obj_spec[2]) { | |
| 516 | - $this->error("Unable to find object ({$obj_spec[1]}, {$obj_spec[2]}) at expected location"); | |
| 517 | - } | |
| 518 | - | |
| 519 | - // If we're being asked to store all the information | |
| 520 | - // about the object, we add the object ID and generation | |
| 521 | - // number for later use | |
| 522 | - $this->actual_obj =& $result; | |
| 523 | - if ($encapsulate) { | |
| 524 | - $result = array ( | |
| 525 | - PDF_TYPE_OBJECT, | |
| 526 | - 'obj' => $obj_spec[1], | |
| 527 | - 'gen' => $obj_spec[2] | |
| 528 | - ); | |
| 529 | - } else { | |
| 530 | - $result = array(); | |
| 531 | - } | |
| 532 | - | |
| 533 | - // Now simply read the object data until | |
| 534 | - // we encounter an end-of-object marker | |
| 535 | - while(1) { | |
| 536 | - $value = $this->pdf_read_value($c); | |
| 537 | - if ($value === false || count($result) > 4) { | |
| 538 | - // in this case the parser coudn't find an endobj so we break here | |
| 539 | - break; | |
| 540 | - } | |
| 541 | - | |
| 542 | - if ($value[0] == PDF_TYPE_TOKEN && $value[1] === 'endobj') { | |
| 543 | - break; | |
| 544 | - } | |
| 545 | - | |
| 546 | - $result[] = $value; | |
| 547 | - } | |
| 548 | - | |
| 549 | - $c->reset($old_pos); | |
| 550 | - | |
| 551 | - if (isset($result[2][0]) && $result[2][0] == PDF_TYPE_STREAM) { | |
| 552 | - $result[0] = PDF_TYPE_STREAM; | |
| 553 | - } | |
| 554 | - | |
| 555 | - return $result; | |
| 556 | - } | |
| 557 | - } else { | |
| 558 | - return $obj_spec; | |
| 559 | - } | |
| 560 | - } | |
| 561 | - | |
| 562 | - | |
| 563 | - | |
| 564 | - /** | |
| 565 | - * Reads a token from the file | |
| 566 | - * | |
| 567 | - * @param object $c pdf_context | |
| 568 | - * @return mixed | |
| 569 | - */ | |
| 570 | - function pdf_read_token(&$c) | |
| 571 | - { | |
| 572 | - // If there is a token available | |
| 573 | - // on the stack, pop it out and | |
| 574 | - // return it. | |
| 575 | - | |
| 576 | - if (count($c->stack)) { | |
| 577 | - return array_pop($c->stack); | |
| 578 | - } | |
| 579 | - | |
| 580 | - // Strip away any whitespace | |
| 581 | - | |
| 582 | - do { | |
| 583 | - if (!$c->ensure_content()) { | |
| 584 | - return false; | |
| 585 | - } | |
| 586 | - $c->offset += _strspn($c->buffer, " \n\r\t", $c->offset); | |
| 587 | - } while ($c->offset >= $c->length - 1); | |
| 588 | - | |
| 589 | - // Get the first character in the stream | |
| 590 | - | |
| 591 | - $char = $c->buffer[$c->offset++]; | |
| 592 | - | |
| 593 | - switch ($char) { | |
| 594 | - | |
| 595 | - case '[' : | |
| 596 | - case ']' : | |
| 597 | - case '(' : | |
| 598 | - case ')' : | |
| 599 | - | |
| 600 | - // This is either an array or literal string | |
| 601 | - // delimiter, Return it | |
| 602 | - | |
| 603 | - return $char; | |
| 604 | - | |
| 605 | - case '<' : | |
| 606 | - case '>' : | |
| 607 | - | |
| 608 | - // This could either be a hex string or | |
| 609 | - // dictionary delimiter. Determine the | |
| 610 | - // appropriate case and return the token | |
| 611 | - | |
| 612 | - if ($c->buffer[$c->offset] == $char) { | |
| 613 | - if (!$c->ensure_content()) { | |
| 614 | - return false; | |
| 615 | - } | |
| 616 | - $c->offset++; | |
| 617 | - return $char . $char; | |
| 618 | - } else { | |
| 619 | - return $char; | |
| 620 | - } | |
| 621 | - | |
| 622 | - default : | |
| 623 | - | |
| 624 | - // This is "another" type of token (probably | |
| 625 | - // a dictionary entry or a numeric value) | |
| 626 | - // Find the end and return it. | |
| 627 | - | |
| 628 | - if (!$c->ensure_content()) { | |
| 629 | - return false; | |
| 630 | - } | |
| 631 | - | |
| 632 | - while(1) { | |
| 633 | - | |
| 634 | - // Determine the length of the token | |
| 635 | - | |
| 636 | - $pos = _strcspn($c->buffer, " []<>()\r\n\t/", $c->offset); | |
| 637 | - if ($c->offset + $pos <= $c->length - 1) { | |
| 638 | - break; | |
| 639 | - } else { | |
| 640 | - // If the script reaches this point, | |
| 641 | - // the token may span beyond the end | |
| 642 | - // of the current buffer. Therefore, | |
| 643 | - // we increase the size of the buffer | |
| 644 | - // and try again--just to be safe. | |
| 645 | - | |
| 646 | - $c->increase_length(); | |
| 647 | - } | |
| 648 | - } | |
| 649 | - | |
| 650 | - $result = substr($c->buffer, $c->offset - 1, $pos + 1); | |
| 651 | - | |
| 652 | - $c->offset += $pos; | |
| 653 | - return $result; | |
| 654 | - } | |
| 655 | - } | |
| 656 | - | |
| 657 | - | |
| 658 | -} | |
| 659 | - | |
| 1 | +<?php | |
| 2 | +// | |
| 3 | +// FPDI - Version 1.2 | |
| 4 | +// | |
| 5 | +// Copyright 2004-2007 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 | + | |
| 43 | +require_once(USCES_PLUGIN_DIR.'/classes/fpdf/pdf_context.php'); | |
| 44 | +require_once(USCES_PLUGIN_DIR.'/classes/fpdf/wrapper_functions.php'); | |
| 45 | + | |
| 46 | +class pdf_parser { | |
| 47 | + | |
| 48 | + /** | |
| 49 | + * Filename | |
| 50 | + * @var string | |
| 51 | + */ | |
| 52 | + var $filename; | |
| 53 | + | |
| 54 | + /** | |
| 55 | + * File resource | |
| 56 | + * @var resource | |
| 57 | + */ | |
| 58 | + var $f; | |
| 59 | + | |
| 60 | + /** | |
| 61 | + * PDF Context | |
| 62 | + * @var object pdf_context-Instance | |
| 63 | + */ | |
| 64 | + var $c; | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * xref-Data | |
| 68 | + * @var array | |
| 69 | + */ | |
| 70 | + var $xref; | |
| 71 | + | |
| 72 | + /** | |
| 73 | + * root-Object | |
| 74 | + * @var array | |
| 75 | + */ | |
| 76 | + var $root; | |
| 77 | + | |
| 78 | + | |
| 79 | + /** | |
| 80 | + * Constructor | |
| 81 | + * | |
| 82 | + * @param string $filename Source-Filename | |
| 83 | + */ | |
| 84 | + function pdf_parser($filename) { | |
| 85 | + $this->filename = $filename; | |
| 86 | + | |
| 87 | + $this->f = @fopen($this->filename, "rb"); | |
| 88 | + | |
| 89 | + if (!$this->f) | |
| 90 | + $this->error(sprintf("Cannot open %s !", $filename)); | |
| 91 | + | |
| 92 | + $this->getPDFVersion(); | |
| 93 | + | |
| 94 | + $this->c = new pdf_context($this->f); | |
| 95 | + // Read xref-Data | |
| 96 | + $this->pdf_read_xref($this->xref, $this->pdf_find_xref()); | |
| 97 | + | |
| 98 | + // Check for Encryption | |
| 99 | + $this->getEncryption(); | |
| 100 | + | |
| 101 | + // Read root | |
| 102 | + $this->pdf_read_root(); | |
| 103 | + } | |
| 104 | + | |
| 105 | + /** | |
| 106 | + * Close the opened file | |
| 107 | + */ | |
| 108 | + function closeFile() { | |
| 109 | + if (isset($this->f)) { | |
| 110 | + fclose($this->f); | |
| 111 | + unset($this->f); | |
| 112 | + } | |
| 113 | + } | |
| 114 | + | |
| 115 | + /** | |
| 116 | + * Print Error and die | |
| 117 | + * | |
| 118 | + * @param string $msg Error-Message | |
| 119 | + */ | |
| 120 | + function error($msg) { | |
| 121 | + die("<b>PDF-Parser Error:</b> ".$msg); | |
| 122 | + } | |
| 123 | + | |
| 124 | + /** | |
| 125 | + * Check Trailer for Encryption | |
| 126 | + */ | |
| 127 | + function getEncryption() { | |
| 128 | + if (isset($this->xref['trailer'][1]['/Encrypt'])) { | |
| 129 | + $this->error("File is encrypted!"); | |
| 130 | + } | |
| 131 | + } | |
| 132 | + | |
| 133 | + /** | |
| 134 | + * Find/Return /Root | |
| 135 | + * | |
| 136 | + * @return array | |
| 137 | + */ | |
| 138 | + function pdf_find_root() { | |
| 139 | + if ($this->xref['trailer'][1]['/Root'][0] != PDF_TYPE_OBJREF) { | |
| 140 | + $this->error("Wrong Type of Root-Element! Must be an indirect reference"); | |
| 141 | + } | |
| 142 | + return $this->xref['trailer'][1]['/Root']; | |
| 143 | + } | |
| 144 | + | |
| 145 | + /** | |
| 146 | + * Read the /Root | |
| 147 | + */ | |
| 148 | + function pdf_read_root() { | |
| 149 | + // read root | |
| 150 | + $this->root = $this->pdf_resolve_object($this->c, $this->pdf_find_root()); | |
| 151 | + } | |
| 152 | + | |
| 153 | + /** | |
| 154 | + * Get PDF-Version | |
| 155 | + * | |
| 156 | + * And reset the PDF Version used in FPDI if needed | |
| 157 | + */ | |
| 158 | + function getPDFVersion() { | |
| 159 | + fseek($this->f, 0); | |
| 160 | + preg_match("/\d\.\d/",fread($this->f,16),$m); | |
| 161 | + $this->pdfVersion = $m[0]; | |
| 162 | + } | |
| 163 | + | |
| 164 | + /** | |
| 165 | + * Find the xref-Table | |
| 166 | + */ | |
| 167 | + function pdf_find_xref() { | |
| 168 | + fseek ($this->f, -min(filesize($this->filename),1500), SEEK_END); | |
| 169 | + $data = fread($this->f, 1500); | |
| 170 | + | |
| 171 | + $pos = strlen($data) - strpos(strrev($data), strrev('startxref')); | |
| 172 | + $data = substr($data, $pos); | |
| 173 | + | |
| 174 | + if (!preg_match('/\s*(\d+).*$/s', $data, $matches)) { | |
| 175 | + $this->error("Unable to find pointer to xref table"); | |
| 176 | + } | |
| 177 | + | |
| 178 | + return (int) $matches[1]; | |
| 179 | + } | |
| 180 | + | |
| 181 | + /** | |
| 182 | + * Read xref-table | |
| 183 | + * | |
| 184 | + * @param array $result Array of xref-table | |
| 185 | + * @param integer $offset of xref-table | |
| 186 | + * @param integer $start start-position in xref-table | |
| 187 | + * @param integer $end end-position in xref-table | |
| 188 | + */ | |
| 189 | + function pdf_read_xref(&$result, $offset, $start = null, $end = null) { | |
| 190 | + if (is_null ($start) || is_null ($end)) { | |
| 191 | + fseek($this->f, $o_pos = $offset); | |
| 192 | + $data = trim(fgets($this->f,1024)); | |
| 193 | + | |
| 194 | + if (strlen($data) == 0) | |
| 195 | + $data = trim(fgets($this->f,1024)); | |
| 196 | + | |
| 197 | + if ($data !== 'xref') { | |
| 198 | + fseek($this->f, $o_pos); | |
| 199 | + $data = trim(_fgets($this->f, true)); | |
| 200 | + if ($data !== 'xref') { | |
| 201 | + if (preg_match('/(.*xref)(.*)/m', $data, $m)) { // xref 0 128 - in one line | |
| 202 | + fseek($this->f, $o_pos+strlen($m[1])); | |
| 203 | + } elseif (preg_match('/(x|r|e|f)+/', $data, $m)) { // correct invalid xref-pointer | |
| 204 | + $tmpOffset = $offset-4+strlen($m[0]); | |
| 205 | + $this->pdf_read_xref($result, $tmpOffset, $start, $end); | |
| 206 | + return; | |
| 207 | + } else { | |
| 208 | + $this->error("Unable to find xref table - Maybe a Problem with 'auto_detect_line_endings'"); | |
| 209 | + } | |
| 210 | + } | |
| 211 | + } | |
| 212 | + | |
| 213 | + $o_pos = ftell($this->f); | |
| 214 | + $data = explode(' ', trim(fgets($this->f,1024))); | |
| 215 | + if (count($data) != 2) { | |
| 216 | + fseek($this->f, $o_pos); | |
| 217 | + $data = explode(' ', trim(_fgets($this->f, true))); | |
| 218 | + | |
| 219 | + if (count($data) != 2) { | |
| 220 | + if (count($data) > 2) { // no lineending | |
| 221 | + $n_pos = $o_pos+strlen($data[0])+strlen($data[1])+2; | |
| 222 | + fseek($this->f, $n_pos); | |
| 223 | + } else { | |
| 224 | + $this->error("Unexpected header in xref table"); | |
| 225 | + } | |
| 226 | + } | |
| 227 | + } | |
| 228 | + $start = $data[0]; | |
| 229 | + $end = $start + $data[1]; | |
| 230 | + } | |
| 231 | + | |
| 232 | + if (!isset($result['xref_location'])) { | |
| 233 | + $result['xref_location'] = $offset; | |
| 234 | + } | |
| 235 | + | |
| 236 | + if (!isset($result['max_object']) || $end > $result['max_object']) { | |
| 237 | + $result['max_object'] = $end; | |
| 238 | + } | |
| 239 | + | |
| 240 | + for (; $start < $end; $start++) { | |
| 241 | + $data = ltrim(fread($this->f, 20)); // Spezifications says: 20 bytes including newlines | |
| 242 | + $offset = substr($data, 0, 10); | |
| 243 | + $generation = substr($data, 11, 5); | |
| 244 | + | |
| 245 | + if (!isset ($result['xref'][$start][(int) $generation])) { | |
| 246 | + $result['xref'][$start][(int) $generation] = (int) $offset; | |
| 247 | + } | |
| 248 | + } | |
| 249 | + | |
| 250 | + $o_pos = ftell($this->f); | |
| 251 | + $data = fgets($this->f,1024); | |
| 252 | + if (strlen(trim($data)) == 0) | |
| 253 | + $data = fgets($this->f, 1024); | |
| 254 | + | |
| 255 | + if (preg_match("/trailer/",$data)) { | |
| 256 | + if (preg_match("/(.*trailer[ \n\r]*)/",$data,$m)) { | |
| 257 | + fseek($this->f, $o_pos+strlen($m[1])); | |
| 258 | + } | |
| 259 | + | |
| 260 | + $c = new pdf_context($this->f); | |
| 261 | + $trailer = $this->pdf_read_value($c); | |
| 262 | + | |
| 263 | + if (isset($trailer[1]['/Prev'])) { | |
| 264 | + $this->pdf_read_xref($result, $trailer[1]['/Prev'][1]); | |
| 265 | + $result['trailer'][1] = array_merge($result['trailer'][1], $trailer[1]); | |
| 266 | + } else { | |
| 267 | + $result['trailer'] = $trailer; | |
| 268 | + } | |
| 269 | + } else { | |
| 270 | + $data = explode(' ', trim($data)); | |
| 271 | + | |
| 272 | + if (count($data) != 2) { | |
| 273 | + fseek($this->f, $o_pos); | |
| 274 | + $data = explode(' ', trim (_fgets ($this->f, true))); | |
| 275 | + | |
| 276 | + if (count($data) != 2) { | |
| 277 | + $this->error("Unexpected data in xref table"); | |
| 278 | + } | |
| 279 | + } | |
| 280 | + | |
| 281 | + $this->pdf_read_xref($result, null, (int) $data[0], (int) $data[0] + (int) $data[1]); | |
| 282 | + } | |
| 283 | + } | |
| 284 | + | |
| 285 | + | |
| 286 | + /** | |
| 287 | + * Reads an Value | |
| 288 | + * | |
| 289 | + * @param object $c pdf_context | |
| 290 | + * @param string $token a Token | |
| 291 | + * @return mixed | |
| 292 | + */ | |
| 293 | + function pdf_read_value(&$c, $token = null) { | |
| 294 | + if (is_null($token)) { | |
| 295 | + $token = $this->pdf_read_token($c); | |
| 296 | + } | |
| 297 | + | |
| 298 | + if ($token === false) { | |
| 299 | + return false; | |
| 300 | + } | |
| 301 | + | |
| 302 | + switch ($token) { | |
| 303 | + case '<': | |
| 304 | + // This is a hex string. | |
| 305 | + // Read the value, then the terminator | |
| 306 | + | |
| 307 | + $pos = $c->offset; | |
| 308 | + | |
| 309 | + while(1) { | |
| 310 | + | |
| 311 | + $match = strpos ($c->buffer, '>', $pos); | |
| 312 | + | |
| 313 | + // If you can't find it, try | |
| 314 | + // reading more data from the stream | |
| 315 | + | |
| 316 | + if ($match === false) { | |
| 317 | + if (!$c->increase_length()) { | |
| 318 | + return false; | |
| 319 | + } else { | |
| 320 | + continue; | |
| 321 | + } | |
| 322 | + } | |
| 323 | + | |
| 324 | + $result = substr ($c->buffer, $c->offset, $match - $c->offset); | |
| 325 | + $c->offset = $match+1; | |
| 326 | + | |
| 327 | + return array (PDF_TYPE_HEX, $result); | |
| 328 | + } | |
| 329 | + | |
| 330 | + break; | |
| 331 | + case '<<': | |
| 332 | + // This is a dictionary. | |
| 333 | + | |
| 334 | + $result = array(); | |
| 335 | + | |
| 336 | + // Recurse into this function until we reach | |
| 337 | + // the end of the dictionary. | |
| 338 | + while (($key = $this->pdf_read_token($c)) !== '>>') { | |
| 339 | + if ($key === false) { | |
| 340 | + return false; | |
| 341 | + } | |
| 342 | + | |
| 343 | + if (($value = $this->pdf_read_value($c)) === false) { | |
| 344 | + return false; | |
| 345 | + } | |
| 346 | + $result[$key] = $value; | |
| 347 | + } | |
| 348 | + | |
| 349 | + return array (PDF_TYPE_DICTIONARY, $result); | |
| 350 | + | |
| 351 | + case '[': | |
| 352 | + // This is an array. | |
| 353 | + | |
| 354 | + $result = array(); | |
| 355 | + | |
| 356 | + // Recurse into this function until we reach | |
| 357 | + // the end of the array. | |
| 358 | + while (($token = $this->pdf_read_token($c)) !== ']') { | |
| 359 | + if ($token === false) { | |
| 360 | + return false; | |
| 361 | + } | |
| 362 | + | |
| 363 | + if (($value = $this->pdf_read_value($c, $token)) === false) { | |
| 364 | + return false; | |
| 365 | + } | |
| 366 | + | |
| 367 | + $result[] = $value; | |
| 368 | + } | |
| 369 | + | |
| 370 | + return array (PDF_TYPE_ARRAY, $result); | |
| 371 | + | |
| 372 | + case '(' : | |
| 373 | + // This is a string | |
| 374 | + | |
| 375 | + $pos = $c->offset; | |
| 376 | + | |
| 377 | + while(1) { | |
| 378 | + | |
| 379 | + // Start by finding the next closed | |
| 380 | + // parenthesis | |
| 381 | + | |
| 382 | + $match = strpos ($c->buffer, ')', $pos); | |
| 383 | + | |
| 384 | + // If you can't find it, try | |
| 385 | + // reading more data from the stream | |
| 386 | + | |
| 387 | + if ($match === false) { | |
| 388 | + if (!$c->increase_length()) { | |
| 389 | + return false; | |
| 390 | + } else { | |
| 391 | + continue; | |
| 392 | + } | |
| 393 | + } | |
| 394 | + | |
| 395 | + // Make sure that there is no backslash | |
| 396 | + // before the parenthesis. If there is, | |
| 397 | + // move on. Otherwise, return the string. | |
| 398 | + $esc = preg_match('/([\\\\]+)$/', $tmpresult = substr($c->buffer, $c->offset, $match - $c->offset), $m); | |
| 399 | + | |
| 400 | + if ($esc === 0 || strlen($m[1]) % 2 == 0) { | |
| 401 | + $result = $tmpresult; | |
| 402 | + $c->offset = $match + 1; | |
| 403 | + return array (PDF_TYPE_STRING, $result); | |
| 404 | + } else { | |
| 405 | + $pos = $match + 1; | |
| 406 | + | |
| 407 | + if ($pos > $c->offset + $c->length) { | |
| 408 | + $c->increase_length(); | |
| 409 | + } | |
| 410 | + } | |
| 411 | + } | |
| 412 | + | |
| 413 | + case "stream": | |
| 414 | + $o_pos = ftell($c->file)-strlen($c->buffer); | |
| 415 | + $o_offset = $c->offset; | |
| 416 | + | |
| 417 | + $c->reset($startpos = $o_pos + $o_offset); | |
| 418 | + | |
| 419 | + $e = 0; // ensure line breaks in front of the stream | |
| 420 | + if ($c->buffer[0] == chr(10) || $c->buffer[0] == chr(13)) | |
| 421 | + $e++; | |
| 422 | + if ($c->buffer[1] == chr(10) && $c->buffer[0] != chr(10)) | |
| 423 | + $e++; | |
| 424 | + | |
| 425 | + if ($this->actual_obj[1][1]['/Length'][0] == PDF_TYPE_OBJREF) { | |
| 426 | + $tmp_c = new pdf_context($this->f); | |
| 427 | + $tmp_length = $this->pdf_resolve_object($tmp_c,$this->actual_obj[1][1]['/Length']); | |
| 428 | + $length = $tmp_length[1][1]; | |
| 429 | + } else { | |
| 430 | + $length = $this->actual_obj[1][1]['/Length'][1]; | |
| 431 | + } | |
| 432 | + | |
| 433 | + if ($length > 0) { | |
| 434 | + $c->reset($startpos+$e,$length); | |
| 435 | + $v = $c->buffer; | |
| 436 | + } else { | |
| 437 | + $v = ''; | |
| 438 | + } | |
| 439 | + $c->reset($startpos+$e+$length+9); // 9 = strlen("endstream") | |
| 440 | + | |
| 441 | + return array(PDF_TYPE_STREAM, $v); | |
| 442 | + | |
| 443 | + default : | |
| 444 | + if (is_numeric ($token)) { | |
| 445 | + // A numeric token. Make sure that | |
| 446 | + // it is not part of something else. | |
| 447 | + if (($tok2 = $this->pdf_read_token ($c)) !== false) { | |
| 448 | + if (is_numeric ($tok2)) { | |
| 449 | + | |
| 450 | + // Two numeric tokens in a row. | |
| 451 | + // In this case, we're probably in | |
| 452 | + // front of either an object reference | |
| 453 | + // or an object specification. | |
| 454 | + // Determine the case and return the data | |
| 455 | + if (($tok3 = $this->pdf_read_token ($c)) !== false) { | |
| 456 | + switch ($tok3) { | |
| 457 | + case 'obj' : | |
| 458 | + return array (PDF_TYPE_OBJDEC, (int) $token, (int) $tok2); | |
| 459 | + case 'R' : | |
| 460 | + return array (PDF_TYPE_OBJREF, (int) $token, (int) $tok2); | |
| 461 | + } | |
| 462 | + // If we get to this point, that numeric value up | |
| 463 | + // there was just a numeric value. Push the extra | |
| 464 | + // tokens back into the stack and return the value. | |
| 465 | + array_push ($c->stack, $tok3); | |
| 466 | + } | |
| 467 | + } | |
| 468 | + | |
| 469 | + array_push ($c->stack, $tok2); | |
| 470 | + } | |
| 471 | + | |
| 472 | + return array (PDF_TYPE_NUMERIC, $token); | |
| 473 | + } else { | |
| 474 | + | |
| 475 | + // Just a token. Return it. | |
| 476 | + return array (PDF_TYPE_TOKEN, $token); | |
| 477 | + } | |
| 478 | + | |
| 479 | + } | |
| 480 | + } | |
| 481 | + | |
| 482 | + /** | |
| 483 | + * Resolve an object | |
| 484 | + * | |
| 485 | + * @param object $c pdf_context | |
| 486 | + * @param array $obj_spec The object-data | |
| 487 | + * @param boolean $encapsulate Must set to true, cause the parsing and fpdi use this method only without this para | |
| 488 | + */ | |
| 489 | + function pdf_resolve_object(&$c, $obj_spec, $encapsulate = true) { | |
| 490 | + // Exit if we get invalid data | |
| 491 | + if (!is_array($obj_spec)) { | |
| 492 | + return false; | |
| 493 | + } | |
| 494 | + | |
| 495 | + if ($obj_spec[0] == PDF_TYPE_OBJREF) { | |
| 496 | + | |
| 497 | + // This is a reference, resolve it | |
| 498 | + if (isset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]])) { | |
| 499 | + | |
| 500 | + // Save current file position | |
| 501 | + // This is needed if you want to resolve | |
| 502 | + // references while you're reading another object | |
| 503 | + // (e.g.: if you need to determine the length | |
| 504 | + // of a stream) | |
| 505 | + | |
| 506 | + $old_pos = ftell($c->file); | |
| 507 | + | |
| 508 | + // Reposition the file pointer and | |
| 509 | + // load the object header. | |
| 510 | + | |
| 511 | + $c->reset($this->xref['xref'][$obj_spec[1]][$obj_spec[2]]); | |
| 512 | + | |
| 513 | + $header = $this->pdf_read_value($c,null,true); | |
| 514 | + | |
| 515 | + if ($header[0] != PDF_TYPE_OBJDEC || $header[1] != $obj_spec[1] || $header[2] != $obj_spec[2]) { | |
| 516 | + $this->error("Unable to find object ({$obj_spec[1]}, {$obj_spec[2]}) at expected location"); | |
| 517 | + } | |
| 518 | + | |
| 519 | + // If we're being asked to store all the information | |
| 520 | + // about the object, we add the object ID and generation | |
| 521 | + // number for later use | |
| 522 | + $this->actual_obj =& $result; | |
| 523 | + if ($encapsulate) { | |
| 524 | + $result = array ( | |
| 525 | + PDF_TYPE_OBJECT, | |
| 526 | + 'obj' => $obj_spec[1], | |
| 527 | + 'gen' => $obj_spec[2] | |
| 528 | + ); | |
| 529 | + } else { | |
| 530 | + $result = array(); | |
| 531 | + } | |
| 532 | + | |
| 533 | + // Now simply read the object data until | |
| 534 | + // we encounter an end-of-object marker | |
| 535 | + while(1) { | |
| 536 | + $value = $this->pdf_read_value($c); | |
| 537 | + if ($value === false || count($result) > 4) { | |
| 538 | + // in this case the parser coudn't find an endobj so we break here | |
| 539 | + break; | |
| 540 | + } | |
| 541 | + | |
| 542 | + if ($value[0] == PDF_TYPE_TOKEN && $value[1] === 'endobj') { | |
| 543 | + break; | |
| 544 | + } | |
| 545 | + | |
| 546 | + $result[] = $value; | |
| 547 | + } | |
| 548 | + | |
| 549 | + $c->reset($old_pos); | |
| 550 | + | |
| 551 | + if (isset($result[2][0]) && $result[2][0] == PDF_TYPE_STREAM) { | |
| 552 | + $result[0] = PDF_TYPE_STREAM; | |
| 553 | + } | |
| 554 | + | |
| 555 | + return $result; | |
| 556 | + } | |
| 557 | + } else { | |
| 558 | + return $obj_spec; | |
| 559 | + } | |
| 560 | + } | |
| 561 | + | |
| 562 | + | |
| 563 | + | |
| 564 | + /** | |
| 565 | + * Reads a token from the file | |
| 566 | + * | |
| 567 | + * @param object $c pdf_context | |
| 568 | + * @return mixed | |
| 569 | + */ | |
| 570 | + function pdf_read_token(&$c) | |
| 571 | + { | |
| 572 | + // If there is a token available | |
| 573 | + // on the stack, pop it out and | |
| 574 | + // return it. | |
| 575 | + | |
| 576 | + if (count($c->stack)) { | |
| 577 | + return array_pop($c->stack); | |
| 578 | + } | |
| 579 | + | |
| 580 | + // Strip away any whitespace | |
| 581 | + | |
| 582 | + do { | |
| 583 | + if (!$c->ensure_content()) { | |
| 584 | + return false; | |
| 585 | + } | |
| 586 | + $c->offset += _strspn($c->buffer, " \n\r\t", $c->offset); | |
| 587 | + } while ($c->offset >= $c->length - 1); | |
| 588 | + | |
| 589 | + // Get the first character in the stream | |
| 590 | + | |
| 591 | + $char = $c->buffer[$c->offset++]; | |
| 592 | + | |
| 593 | + switch ($char) { | |
| 594 | + | |
| 595 | + case '[' : | |
| 596 | + case ']' : | |
| 597 | + case '(' : | |
| 598 | + case ')' : | |
| 599 | + | |
| 600 | + // This is either an array or literal string | |
| 601 | + // delimiter, Return it | |
| 602 | + | |
| 603 | + return $char; | |
| 604 | + | |
| 605 | + case '<' : | |
| 606 | + case '>' : | |
| 607 | + | |
| 608 | + // This could either be a hex string or | |
| 609 | + // dictionary delimiter. Determine the | |
| 610 | + // appropriate case and return the token | |
| 611 | + | |
| 612 | + if ($c->buffer[$c->offset] == $char) { | |
| 613 | + if (!$c->ensure_content()) { | |
| 614 | + return false; | |
| 615 | + } | |
| 616 | + $c->offset++; | |
| 617 | + return $char . $char; | |
| 618 | + } else { | |
| 619 | + return $char; | |
| 620 | + } | |
| 621 | + | |
| 622 | + default : | |
| 623 | + | |
| 624 | + // This is "another" type of token (probably | |
| 625 | + // a dictionary entry or a numeric value) | |
| 626 | + // Find the end and return it. | |
| 627 | + | |
| 628 | + if (!$c->ensure_content()) { | |
| 629 | + return false; | |
| 630 | + } | |
| 631 | + | |
| 632 | + while(1) { | |
| 633 | + | |
| 634 | + // Determine the length of the token | |
| 635 | + | |
| 636 | + $pos = _strcspn($c->buffer, " []<>()\r\n\t/", $c->offset); | |
| 637 | + if ($c->offset + $pos <= $c->length - 1) { | |
| 638 | + break; | |
| 639 | + } else { | |
| 640 | + // If the script reaches this point, | |
| 641 | + // the token may span beyond the end | |
| 642 | + // of the current buffer. Therefore, | |
| 643 | + // we increase the size of the buffer | |
| 644 | + // and try again--just to be safe. | |
| 645 | + | |
| 646 | + $c->increase_length(); | |
| 647 | + } | |
| 648 | + } | |
| 649 | + | |
| 650 | + $result = substr($c->buffer, $c->offset - 1, $pos + 1); | |
| 651 | + | |
| 652 | + $c->offset += $pos; | |
| 653 | + return $result; | |
| 654 | + } | |
| 655 | + } | |
| 656 | + | |
| 657 | + | |
| 658 | +} | |
| 659 | + | |
| 660 | 660 | ?> |
