Changeset 23376
- Timestamp:
- 02/02/2013 02:09:01 AM (12 years ago)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
trunk/wp-includes/class-json.php
r22798 r23376 1 1 <?php 2 if ( ! class_exists( 'Services_JSON' ) ) :2 if ( ! class_exists( 'Services_JSON' ) ) : 3 3 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ 4 4 /** … … 47 47 * 48 48 * @category 49 * @package 50 * @author 51 * @author 52 * @author 53 * @copyright 54 * @version CVS: $Id: JSON.php 288200 2009-09-09 15:41:29Z alan_k $55 * @license 56 * @link 49 * @package Services_JSON 50 * @author Michal Migurski <mike-json@teczno.com> 51 * @author Matt Knapp <mdknapp[at]gmail[dot]com> 52 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> 53 * @copyright 2005 Michal Migurski 54 * @version CVS: $Id: JSON.php 305040 2010-11-02 23:19:03Z alan_k $ 55 * @license http://www.opensource.org/licenses/bsd-license.php 56 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 57 57 */ 58 58 … … 60 60 * Marker constant for Services_JSON::decode(), used to flag stack state 61 61 */ 62 define('SERVICES_JSON_SLICE', 1);62 define('SERVICES_JSON_SLICE', 1); 63 63 64 64 /** … … 91 91 */ 92 92 define('SERVICES_JSON_SUPPRESS_ERRORS', 32); 93 94 /** 95 * Behavior switch for Services_JSON::decode() 96 */ 97 define('SERVICES_JSON_USE_TO_JSON', 64); 93 98 94 99 /** … … 115 120 class Services_JSON 116 121 { 117 /** 118 * constructs a new JSON instance 119 * 120 * @param int $use object behavior flags; combine with boolean-OR 121 * 122 * possible values: 123 * - SERVICES_JSON_LOOSE_TYPE: loose typing. 124 * "{...}" syntax creates associative arrays 125 * instead of objects in decode(). 126 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. 127 * Values which can't be encoded (e.g. resources) 128 * appear as NULL instead of throwing errors. 129 * By default, a deeply-nested resource will 130 * bubble up with an error, so all return values 131 * from encode() should be checked with isError() 132 */ 133 function Services_JSON($use = 0) 134 { 135 $this->use = $use; 136 } 137 138 /** 139 * convert a string from one UTF-16 char to one UTF-8 char 140 * 141 * Normally should be handled by mb_convert_encoding, but 142 * provides a slower PHP-only method for installations 143 * that lack the multibye string extension. 144 * 145 * @param string $utf16 UTF-16 character 146 * @return string UTF-8 character 147 * @access private 148 */ 149 function utf162utf8($utf16) 150 { 151 // oh please oh please oh please oh please oh please 152 if(function_exists('mb_convert_encoding')) { 153 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); 154 } 155 156 $bytes = (ord($utf16[0]) << 8) | ord($utf16[1]); 157 158 switch(true) { 159 case ((0x7F & $bytes) == $bytes): 160 // this case should never be reached, because we are in ASCII range 161 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 162 return chr(0x7F & $bytes); 163 164 case (0x07FF & $bytes) == $bytes: 165 // return a 2-byte UTF-8 character 166 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 167 return chr(0xC0 | (($bytes >> 6) & 0x1F)) 168 . chr(0x80 | ($bytes & 0x3F)); 169 170 case (0xFFFF & $bytes) == $bytes: 171 // return a 3-byte UTF-8 character 172 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 173 return chr(0xE0 | (($bytes >> 12) & 0x0F)) 174 . chr(0x80 | (($bytes >> 6) & 0x3F)) 175 . chr(0x80 | ($bytes & 0x3F)); 176 } 177 178 // ignoring UTF-32 for now, sorry 179 return ''; 180 } 181 182 /** 183 * convert a string from one UTF-8 char to one UTF-16 char 184 * 185 * Normally should be handled by mb_convert_encoding, but 186 * provides a slower PHP-only method for installations 187 * that lack the multibye string extension. 188 * 189 * @param string $utf8 UTF-8 character 190 * @return string UTF-16 character 191 * @access private 192 */ 193 function utf82utf16($utf8) 194 { 195 // oh please oh please oh please oh please oh please 196 if(function_exists('mb_convert_encoding')) { 197 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); 198 } 199 200 switch(strlen($utf8)) { 201 case 1: 202 // this case should never be reached, because we are in ASCII range 203 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 204 return $utf8; 205 206 case 2: 207 // return a UTF-16 character from a 2-byte UTF-8 char 208 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 209 return chr(0x07 & (ord($utf8[0]) >> 2)) 210 . chr((0xC0 & (ord($utf8[0]) << 6)) 211 | (0x3F & ord($utf8[1]))); 212 213 case 3: 214 // return a UTF-16 character from a 3-byte UTF-8 char 215 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 216 return chr((0xF0 & (ord($utf8[0]) << 4)) 217 | (0x0F & (ord($utf8[1]) >> 2))) 218 . chr((0xC0 & (ord($utf8[1]) << 6)) 219 | (0x7F & ord($utf8[2]))); 220 } 221 222 // ignoring UTF-32 for now, sorry 223 return ''; 224 } 225 226 /** 227 * encodes an arbitrary variable into JSON format (and sends JSON Header) 228 * 229 * @param mixed $var any number, boolean, string, array, or object to be encoded. 230 * see argument 1 to Services_JSON() above for array-parsing behavior. 231 * if var is a strng, note that encode() always expects it 232 * to be in ASCII or UTF-8 format! 233 * 234 * @return mixed JSON string representation of input var or an error if a problem occurs 235 * @access public 236 */ 237 function encode($var) 238 { 239 header('Content-type: application/json'); 240 return $this->_encode($var); 241 } 242 /** 243 * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow CSS!!!!) 244 * 245 * @param mixed $var any number, boolean, string, array, or object to be encoded. 246 * see argument 1 to Services_JSON() above for array-parsing behavior. 247 * if var is a strng, note that encode() always expects it 248 * to be in ASCII or UTF-8 format! 249 * 250 * @return mixed JSON string representation of input var or an error if a problem occurs 251 * @access public 252 */ 253 function encodeUnsafe($var) 254 { 255 return $this->_encode($var); 256 } 257 /** 258 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 259 * 260 * @param mixed $var any number, boolean, string, array, or object to be encoded. 261 * see argument 1 to Services_JSON() above for array-parsing behavior. 262 * if var is a strng, note that encode() always expects it 263 * to be in ASCII or UTF-8 format! 264 * 265 * @return mixed JSON string representation of input var or an error if a problem occurs 266 * @access public 267 */ 268 function _encode($var) 269 { 270 271 switch (gettype($var)) { 272 case 'boolean': 273 return $var ? 'true' : 'false'; 274 275 case 'NULL': 276 return 'null'; 277 278 case 'integer': 279 return (int) $var; 280 281 case 'double': 282 case 'float': 283 return (float) $var; 284 285 case 'string': 286 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT 287 $ascii = ''; 288 $strlen_var = strlen($var); 289 290 /* 291 * Iterate over every character in the string, 292 * escaping with a slash or encoding to UTF-8 where necessary 293 */ 294 for ($c = 0; $c < $strlen_var; ++$c) { 295 296 $ord_var_c = ord($var[$c]); 297 298 switch (true) { 299 case $ord_var_c == 0x08: 300 $ascii .= '\b'; 301 break; 302 case $ord_var_c == 0x09: 303 $ascii .= '\t'; 304 break; 305 case $ord_var_c == 0x0A: 306 $ascii .= '\n'; 307 break; 308 case $ord_var_c == 0x0C: 309 $ascii .= '\f'; 310 break; 311 case $ord_var_c == 0x0D: 312 $ascii .= '\r'; 313 break; 314 315 case $ord_var_c == 0x22: 316 case $ord_var_c == 0x2F: 317 case $ord_var_c == 0x5C: 318 // double quote, slash, slosh 319 $ascii .= '\\'.$var[$c]; 320 break; 321 322 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): 323 // characters U-00000000 - U-0000007F (same as ASCII) 324 $ascii .= $var[$c]; 325 break; 326 327 case (($ord_var_c & 0xE0) == 0xC0): 328 // characters U-00000080 - U-000007FF, mask 110XXXXX 329 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 330 if ($c+1 >= $strlen_var) { 331 $c += 1; 332 $ascii .= '?'; 333 break; 334 } 335 336 $char = pack('C*', $ord_var_c, ord($var[$c + 1])); 337 $c += 1; 338 $utf16 = $this->utf82utf16($char); 339 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 340 break; 341 342 case (($ord_var_c & 0xF0) == 0xE0): 343 if ($c+2 >= $strlen_var) { 344 $c += 2; 345 $ascii .= '?'; 346 break; 347 } 348 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 349 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 350 $char = pack('C*', $ord_var_c, 351 @ord($var[$c + 1]), 352 @ord($var[$c + 2])); 353 $c += 2; 354 $utf16 = $this->utf82utf16($char); 355 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 356 break; 357 358 case (($ord_var_c & 0xF8) == 0xF0): 359 if ($c+3 >= $strlen_var) { 360 $c += 3; 361 $ascii .= '?'; 362 break; 363 } 364 // characters U-00010000 - U-001FFFFF, mask 11110XXX 365 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 366 $char = pack('C*', $ord_var_c, 367 ord($var[$c + 1]), 368 ord($var[$c + 2]), 369 ord($var[$c + 3])); 370 $c += 3; 371 $utf16 = $this->utf82utf16($char); 372 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 373 break; 374 375 case (($ord_var_c & 0xFC) == 0xF8): 376 // characters U-00200000 - U-03FFFFFF, mask 111110XX 377 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 378 if ($c+4 >= $strlen_var) { 379 $c += 4; 380 $ascii .= '?'; 381 break; 382 } 383 $char = pack('C*', $ord_var_c, 384 ord($var[$c + 1]), 385 ord($var[$c + 2]), 386 ord($var[$c + 3]), 387 ord($var[$c + 4])); 388 $c += 4; 389 $utf16 = $this->utf82utf16($char); 390 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 391 break; 392 393 case (($ord_var_c & 0xFE) == 0xFC): 394 if ($c+5 >= $strlen_var) { 395 $c += 5; 396 $ascii .= '?'; 397 break; 398 } 399 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 400 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 401 $char = pack('C*', $ord_var_c, 402 ord($var[$c + 1]), 403 ord($var[$c + 2]), 404 ord($var[$c + 3]), 405 ord($var[$c + 4]), 406 ord($var[$c + 5])); 407 $c += 5; 408 $utf16 = $this->utf82utf16($char); 409 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 410 break; 411 } 412 } 413 return '"'.$ascii.'"'; 414 415 case 'array': 416 /* 417 * As per JSON spec if any array key is not an integer 418 * we must treat the the whole array as an object. We 419 * also try to catch a sparsely populated associative 420 * array with numeric keys here because some JS engines 421 * will create an array with empty indexes up to 422 * max_index which can cause memory issues and because 423 * the keys, which may be relevant, will be remapped 424 * otherwise. 425 * 426 * As per the ECMA and JSON specification an object may 427 * have any string as a property. Unfortunately due to 428 * a hole in the ECMA specification if the key is a 429 * ECMA reserved word or starts with a digit the 430 * parameter is only accessible using ECMAScript's 431 * bracket notation. 432 */ 433 434 // treat as a JSON object 435 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { 436 $properties = array_map(array($this, 'name_value'), 437 array_keys($var), 438 array_values($var)); 439 440 foreach($properties as $property) { 441 if(Services_JSON::isError($property)) { 442 return $property; 443 } 444 } 445 446 return '{' . join(',', $properties) . '}'; 447 } 448 449 // treat it like a regular array 450 $elements = array_map(array($this, '_encode'), $var); 451 452 foreach($elements as $element) { 453 if(Services_JSON::isError($element)) { 454 return $element; 455 } 456 } 457 458 return '[' . join(',', $elements) . ']'; 459 460 case 'object': 461 $vars = get_object_vars($var); 462 463 $properties = array_map(array($this, 'name_value'), 464 array_keys($vars), 465 array_values($vars)); 466 467 foreach($properties as $property) { 468 if(Services_JSON::isError($property)) { 469 return $property; 470 } 471 } 472 473 return '{' . join(',', $properties) . '}'; 474 475 default: 476 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 477 ? 'null' 478 : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); 479 } 480 } 481 482 /** 483 * array-walking function for use in generating JSON-formatted name-value pairs 484 * 485 * @param string $name name of key to use 486 * @param mixed $value reference to an array element to be encoded 487 * 488 * @return string JSON-formatted name-value pair, like '"name":value' 489 * @access private 490 */ 491 function name_value($name, $value) 492 { 493 $encoded_value = $this->_encode($value); 494 495 if(Services_JSON::isError($encoded_value)) { 496 return $encoded_value; 497 } 498 499 return $this->_encode(strval($name)) . ':' . $encoded_value; 500 } 501 502 /** 503 * reduce a string by removing leading and trailing comments and whitespace 504 * 505 * @param $str string string value to strip of comments and whitespace 506 * 507 * @return string string value stripped of comments and whitespace 508 * @access private 509 */ 510 function reduce_string($str) 511 { 512 $str = preg_replace(array( 513 514 // eliminate single line comments in '// ...' form 515 '#^\s*//(.+)$#m', 516 517 // eliminate multi-line comments in '/* ... */' form, at start of string 518 '#^\s*/\*(.+)\*/#Us', 519 520 // eliminate multi-line comments in '/* ... */' form, at end of string 521 '#/\*(.+)\*/\s*$#Us' 522 523 ), '', $str); 524 525 // eliminate extraneous space 526 return trim($str); 527 } 528 529 /** 530 * decodes a JSON string into appropriate variable 531 * 532 * @param string $str JSON-formatted string 533 * 534 * @return mixed number, boolean, string, array, or object 535 * corresponding to given JSON input string. 536 * See argument 1 to Services_JSON() above for object-output behavior. 537 * Note that decode() always returns strings 538 * in ASCII or UTF-8 format! 539 * @access public 540 */ 541 function decode($str) 542 { 543 $str = $this->reduce_string($str); 544 545 switch (strtolower($str)) { 546 case 'true': 547 return true; 548 549 case 'false': 550 return false; 551 552 case 'null': 553 return null; 554 555 default: 556 $m = array(); 557 558 if (is_numeric($str)) { 559 // Lookie-loo, it's a number 560 561 // This would work on its own, but I'm trying to be 562 // good about returning integers where appropriate: 563 // return (float)$str; 564 565 // Return float or int, as appropriate 566 return ((float)$str == (integer)$str) 567 ? (integer)$str 568 : (float)$str; 569 570 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { 571 // STRINGS RETURNED IN UTF-8 FORMAT 572 $delim = substr($str, 0, 1); 573 $chrs = substr($str, 1, -1); 574 $utf8 = ''; 575 $strlen_chrs = strlen($chrs); 576 577 for ($c = 0; $c < $strlen_chrs; ++$c) { 578 579 $substr_chrs_c_2 = substr($chrs, $c, 2); 580 $ord_chrs_c = ord($chrs[$c]); 581 582 switch (true) { 583 case $substr_chrs_c_2 == '\b': 584 $utf8 .= chr(0x08); 585 ++$c; 586 break; 587 case $substr_chrs_c_2 == '\t': 588 $utf8 .= chr(0x09); 589 ++$c; 590 break; 591 case $substr_chrs_c_2 == '\n': 592 $utf8 .= chr(0x0A); 593 ++$c; 594 break; 595 case $substr_chrs_c_2 == '\f': 596 $utf8 .= chr(0x0C); 597 ++$c; 598 break; 599 case $substr_chrs_c_2 == '\r': 600 $utf8 .= chr(0x0D); 601 ++$c; 602 break; 603 604 case $substr_chrs_c_2 == '\\"': 605 case $substr_chrs_c_2 == '\\\'': 606 case $substr_chrs_c_2 == '\\\\': 607 case $substr_chrs_c_2 == '\\/': 608 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || 609 ($delim == "'" && $substr_chrs_c_2 != '\\"')) { 610 $utf8 .= $chrs[++$c]; 611 } 612 break; 613 614 case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): 615 // single, escaped unicode character 616 $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) 617 . chr(hexdec(substr($chrs, ($c + 4), 2))); 618 $utf8 .= $this->utf162utf8($utf16); 619 $c += 5; 620 break; 621 622 case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): 623 $utf8 .= $chrs[$c]; 624 break; 625 626 case ($ord_chrs_c & 0xE0) == 0xC0: 627 // characters U-00000080 - U-000007FF, mask 110XXXXX 628 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 629 $utf8 .= substr($chrs, $c, 2); 630 ++$c; 631 break; 632 633 case ($ord_chrs_c & 0xF0) == 0xE0: 634 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 635 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 636 $utf8 .= substr($chrs, $c, 3); 637 $c += 2; 638 break; 639 640 case ($ord_chrs_c & 0xF8) == 0xF0: 641 // characters U-00010000 - U-001FFFFF, mask 11110XXX 642 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 643 $utf8 .= substr($chrs, $c, 4); 644 $c += 3; 645 break; 646 647 case ($ord_chrs_c & 0xFC) == 0xF8: 648 // characters U-00200000 - U-03FFFFFF, mask 111110XX 649 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 650 $utf8 .= substr($chrs, $c, 5); 651 $c += 4; 652 break; 653 654 case ($ord_chrs_c & 0xFE) == 0xFC: 655 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 656 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 657 $utf8 .= substr($chrs, $c, 6); 658 $c += 5; 659 break; 660 661 } 662 663 } 664 665 return $utf8; 666 667 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { 668 // array, or object notation 669 670 if ($str[0] == '[') { 671 $stk = array(SERVICES_JSON_IN_ARR); 672 $arr = array(); 673 } else { 674 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 675 $stk = array(SERVICES_JSON_IN_OBJ); 676 $obj = array(); 677 } else { 678 $stk = array(SERVICES_JSON_IN_OBJ); 679 $obj = new stdClass(); 680 } 681 } 682 683 array_push($stk, array('what' => SERVICES_JSON_SLICE, 684 'where' => 0, 685 'delim' => false)); 686 687 $chrs = substr($str, 1, -1); 688 $chrs = $this->reduce_string($chrs); 689 690 if ($chrs == '') { 691 if (reset($stk) == SERVICES_JSON_IN_ARR) { 692 return $arr; 693 694 } else { 695 return $obj; 696 697 } 698 } 699 700 //print("\nparsing {$chrs}\n"); 701 702 $strlen_chrs = strlen($chrs); 703 704 for ($c = 0; $c <= $strlen_chrs; ++$c) { 705 706 $top = end($stk); 707 $substr_chrs_c_2 = substr($chrs, $c, 2); 708 709 if (($c == $strlen_chrs) || (($chrs[$c] == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { 710 // found a comma that is not inside a string, array, etc., 711 // OR we've reached the end of the character list 712 $slice = substr($chrs, $top['where'], ($c - $top['where'])); 713 array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); 714 //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 715 716 if (reset($stk) == SERVICES_JSON_IN_ARR) { 717 // we are in an array, so just push an element onto the stack 718 array_push($arr, $this->decode($slice)); 719 720 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 721 // we are in an object, so figure 722 // out the property name and set an 723 // element in an associative array, 724 // for now 725 $parts = array(); 726 727 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 728 // "name":value pair 729 $key = $this->decode($parts[1]); 730 $val = $this->decode($parts[2]); 731 732 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 733 $obj[$key] = $val; 734 } else { 735 $obj->$key = $val; 736 } 737 } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 738 // name:value pair, where name is unquoted 739 $key = $parts[1]; 740 $val = $this->decode($parts[2]); 741 742 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 743 $obj[$key] = $val; 744 } else { 745 $obj->$key = $val; 746 } 747 } 748 749 } 750 751 } elseif ((($chrs[$c] == '"') || ($chrs[$c] == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { 752 // found a quote, and we are not inside a string 753 array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs[$c])); 754 //print("Found start of string at {$c}\n"); 755 756 } elseif (($chrs[$c] == $top['delim']) && 757 ($top['what'] == SERVICES_JSON_IN_STR) && 758 ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) { 759 // found a quote, we're in a string, and it's not escaped 760 // we know that it's not escaped becase there is _not_ an 761 // odd number of backslashes at the end of the string so far 762 array_pop($stk); 763 //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); 764 765 } elseif (($chrs[$c] == '[') && 766 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 767 // found a left-bracket, and we are in an array, object, or slice 768 array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); 769 //print("Found start of array at {$c}\n"); 770 771 } elseif (($chrs[$c] == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { 772 // found a right-bracket, and we're in an array 773 array_pop($stk); 774 //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 775 776 } elseif (($chrs[$c] == '{') && 777 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 778 // found a left-brace, and we are in an array, object, or slice 779 array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); 780 //print("Found start of object at {$c}\n"); 781 782 } elseif (($chrs[$c] == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { 783 // found a right-brace, and we're in an object 784 array_pop($stk); 785 //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 786 787 } elseif (($substr_chrs_c_2 == '/*') && 788 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 789 // found a comment start, and we are in an array, object, or slice 790 array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); 791 $c++; 792 //print("Found start of comment at {$c}\n"); 793 794 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { 795 // found a comment end, and we're in one now 796 array_pop($stk); 797 $c++; 798 799 for ($i = $top['where']; $i <= $c; ++$i) 800 $chrs = substr_replace($chrs, ' ', $i, 1); 801 802 //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 803 804 } 805 806 } 807 808 if (reset($stk) == SERVICES_JSON_IN_ARR) { 809 return $arr; 810 811 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 812 return $obj; 813 814 } 815 816 } 817 } 818 } 819 820 /** 821 * @todo Ultimately, this should just call PEAR::isError() 822 */ 823 function isError($data, $code = null) 824 { 825 if (class_exists('pear')) { 826 return PEAR::isError($data, $code); 827 } elseif (is_object($data) && (get_class($data) == 'services_json_error' || 828 is_subclass_of($data, 'services_json_error'))) { 829 return true; 830 } 831 832 return false; 833 } 122 /** 123 * constructs a new JSON instance 124 * 125 * @param int $use object behavior flags; combine with boolean-OR 126 * 127 * possible values: 128 * - SERVICES_JSON_LOOSE_TYPE: loose typing. 129 * "{...}" syntax creates associative arrays 130 * instead of objects in decode(). 131 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. 132 * Values which can't be encoded (e.g. resources) 133 * appear as NULL instead of throwing errors. 134 * By default, a deeply-nested resource will 135 * bubble up with an error, so all return values 136 * from encode() should be checked with isError() 137 * - SERVICES_JSON_USE_TO_JSON: call toJSON when serializing objects 138 * It serializes the return value from the toJSON call rather 139 * than the object it'self, toJSON can return associative arrays, 140 * strings or numbers, if you return an object, make sure it does 141 * not have a toJSON method, otherwise an error will occur. 142 */ 143 function Services_JSON($use = 0) 144 { 145 $this->use = $use; 146 $this->_mb_strlen = function_exists('mb_strlen'); 147 $this->_mb_convert_encoding = function_exists('mb_convert_encoding'); 148 $this->_mb_substr = function_exists('mb_substr'); 149 } 150 // private - cache the mbstring lookup results.. 151 var $_mb_strlen = false; 152 var $_mb_substr = false; 153 var $_mb_convert_encoding = false; 154 155 /** 156 * convert a string from one UTF-16 char to one UTF-8 char 157 * 158 * Normally should be handled by mb_convert_encoding, but 159 * provides a slower PHP-only method for installations 160 * that lack the multibye string extension. 161 * 162 * @param string $utf16 UTF-16 character 163 * @return string UTF-8 character 164 * @access private 165 */ 166 function utf162utf8($utf16) 167 { 168 // oh please oh please oh please oh please oh please 169 if($this->_mb_convert_encoding) { 170 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); 171 } 172 173 $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); 174 175 switch(true) { 176 case ((0x7F & $bytes) == $bytes): 177 // this case should never be reached, because we are in ASCII range 178 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 179 return chr(0x7F & $bytes); 180 181 case (0x07FF & $bytes) == $bytes: 182 // return a 2-byte UTF-8 character 183 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 184 return chr(0xC0 | (($bytes >> 6) & 0x1F)) 185 . chr(0x80 | ($bytes & 0x3F)); 186 187 case (0xFFFF & $bytes) == $bytes: 188 // return a 3-byte UTF-8 character 189 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 190 return chr(0xE0 | (($bytes >> 12) & 0x0F)) 191 . chr(0x80 | (($bytes >> 6) & 0x3F)) 192 . chr(0x80 | ($bytes & 0x3F)); 193 } 194 195 // ignoring UTF-32 for now, sorry 196 return ''; 197 } 198 199 /** 200 * convert a string from one UTF-8 char to one UTF-16 char 201 * 202 * Normally should be handled by mb_convert_encoding, but 203 * provides a slower PHP-only method for installations 204 * that lack the multibye string extension. 205 * 206 * @param string $utf8 UTF-8 character 207 * @return string UTF-16 character 208 * @access private 209 */ 210 function utf82utf16($utf8) 211 { 212 // oh please oh please oh please oh please oh please 213 if($this->_mb_convert_encoding) { 214 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); 215 } 216 217 switch($this->strlen8($utf8)) { 218 case 1: 219 // this case should never be reached, because we are in ASCII range 220 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 221 return $utf8; 222 223 case 2: 224 // return a UTF-16 character from a 2-byte UTF-8 char 225 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 226 return chr(0x07 & (ord($utf8{0}) >> 2)) 227 . chr((0xC0 & (ord($utf8{0}) << 6)) 228 | (0x3F & ord($utf8{1}))); 229 230 case 3: 231 // return a UTF-16 character from a 3-byte UTF-8 char 232 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 233 return chr((0xF0 & (ord($utf8{0}) << 4)) 234 | (0x0F & (ord($utf8{1}) >> 2))) 235 . chr((0xC0 & (ord($utf8{1}) << 6)) 236 | (0x7F & ord($utf8{2}))); 237 } 238 239 // ignoring UTF-32 for now, sorry 240 return ''; 241 } 242 243 /** 244 * encodes an arbitrary variable into JSON format (and sends JSON Header) 245 * 246 * @param mixed $var any number, boolean, string, array, or object to be encoded. 247 * see argument 1 to Services_JSON() above for array-parsing behavior. 248 * if var is a strng, note that encode() always expects it 249 * to be in ASCII or UTF-8 format! 250 * 251 * @return mixed JSON string representation of input var or an error if a problem occurs 252 * @access public 253 */ 254 function encode($var) 255 { 256 header('Content-type: application/json'); 257 return $this->encodeUnsafe($var); 258 } 259 /** 260 * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow XSS!!!!) 261 * 262 * @param mixed $var any number, boolean, string, array, or object to be encoded. 263 * see argument 1 to Services_JSON() above for array-parsing behavior. 264 * if var is a strng, note that encode() always expects it 265 * to be in ASCII or UTF-8 format! 266 * 267 * @return mixed JSON string representation of input var or an error if a problem occurs 268 * @access public 269 */ 270 function encodeUnsafe($var) 271 { 272 // see bug #16908 - regarding numeric locale printing 273 $lc = setlocale(LC_NUMERIC, 0); 274 setlocale(LC_NUMERIC, 'C'); 275 $ret = $this->_encode($var); 276 setlocale(LC_NUMERIC, $lc); 277 return $ret; 278 279 } 280 /** 281 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 282 * 283 * @param mixed $var any number, boolean, string, array, or object to be encoded. 284 * see argument 1 to Services_JSON() above for array-parsing behavior. 285 * if var is a strng, note that encode() always expects it 286 * to be in ASCII or UTF-8 format! 287 * 288 * @return mixed JSON string representation of input var or an error if a problem occurs 289 * @access public 290 */ 291 function _encode($var) 292 { 293 294 switch (gettype($var)) { 295 case 'boolean': 296 return $var ? 'true' : 'false'; 297 298 case 'NULL': 299 return 'null'; 300 301 case 'integer': 302 return (int) $var; 303 304 case 'double': 305 case 'float': 306 return (float) $var; 307 308 case 'string': 309 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT 310 $ascii = ''; 311 $strlen_var = $this->strlen8($var); 312 313 /* 314 * Iterate over every character in the string, 315 * escaping with a slash or encoding to UTF-8 where necessary 316 */ 317 for ($c = 0; $c < $strlen_var; ++$c) { 318 319 $ord_var_c = ord($var{$c}); 320 321 switch (true) { 322 case $ord_var_c == 0x08: 323 $ascii .= '\b'; 324 break; 325 case $ord_var_c == 0x09: 326 $ascii .= '\t'; 327 break; 328 case $ord_var_c == 0x0A: 329 $ascii .= '\n'; 330 break; 331 case $ord_var_c == 0x0C: 332 $ascii .= '\f'; 333 break; 334 case $ord_var_c == 0x0D: 335 $ascii .= '\r'; 336 break; 337 338 case $ord_var_c == 0x22: 339 case $ord_var_c == 0x2F: 340 case $ord_var_c == 0x5C: 341 // double quote, slash, slosh 342 $ascii .= '\\'.$var{$c}; 343 break; 344 345 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): 346 // characters U-00000000 - U-0000007F (same as ASCII) 347 $ascii .= $var{$c}; 348 break; 349 350 case (($ord_var_c & 0xE0) == 0xC0): 351 // characters U-00000080 - U-000007FF, mask 110XXXXX 352 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 353 if ($c+1 >= $strlen_var) { 354 $c += 1; 355 $ascii .= '?'; 356 break; 357 } 358 359 $char = pack('C*', $ord_var_c, ord($var{$c + 1})); 360 $c += 1; 361 $utf16 = $this->utf82utf16($char); 362 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 363 break; 364 365 case (($ord_var_c & 0xF0) == 0xE0): 366 if ($c+2 >= $strlen_var) { 367 $c += 2; 368 $ascii .= '?'; 369 break; 370 } 371 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 372 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 373 $char = pack('C*', $ord_var_c, 374 @ord($var{$c + 1}), 375 @ord($var{$c + 2})); 376 $c += 2; 377 $utf16 = $this->utf82utf16($char); 378 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 379 break; 380 381 case (($ord_var_c & 0xF8) == 0xF0): 382 if ($c+3 >= $strlen_var) { 383 $c += 3; 384 $ascii .= '?'; 385 break; 386 } 387 // characters U-00010000 - U-001FFFFF, mask 11110XXX 388 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 389 $char = pack('C*', $ord_var_c, 390 ord($var{$c + 1}), 391 ord($var{$c + 2}), 392 ord($var{$c + 3})); 393 $c += 3; 394 $utf16 = $this->utf82utf16($char); 395 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 396 break; 397 398 case (($ord_var_c & 0xFC) == 0xF8): 399 // characters U-00200000 - U-03FFFFFF, mask 111110XX 400 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 401 if ($c+4 >= $strlen_var) { 402 $c += 4; 403 $ascii .= '?'; 404 break; 405 } 406 $char = pack('C*', $ord_var_c, 407 ord($var{$c + 1}), 408 ord($var{$c + 2}), 409 ord($var{$c + 3}), 410 ord($var{$c + 4})); 411 $c += 4; 412 $utf16 = $this->utf82utf16($char); 413 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 414 break; 415 416 case (($ord_var_c & 0xFE) == 0xFC): 417 if ($c+5 >= $strlen_var) { 418 $c += 5; 419 $ascii .= '?'; 420 break; 421 } 422 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 423 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 424 $char = pack('C*', $ord_var_c, 425 ord($var{$c + 1}), 426 ord($var{$c + 2}), 427 ord($var{$c + 3}), 428 ord($var{$c + 4}), 429 ord($var{$c + 5})); 430 $c += 5; 431 $utf16 = $this->utf82utf16($char); 432 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 433 break; 434 } 435 } 436 return '"'.$ascii.'"'; 437 438 case 'array': 439 /* 440 * As per JSON spec if any array key is not an integer 441 * we must treat the the whole array as an object. We 442 * also try to catch a sparsely populated associative 443 * array with numeric keys here because some JS engines 444 * will create an array with empty indexes up to 445 * max_index which can cause memory issues and because 446 * the keys, which may be relevant, will be remapped 447 * otherwise. 448 * 449 * As per the ECMA and JSON specification an object may 450 * have any string as a property. Unfortunately due to 451 * a hole in the ECMA specification if the key is a 452 * ECMA reserved word or starts with a digit the 453 * parameter is only accessible using ECMAScript's 454 * bracket notation. 455 */ 456 457 // treat as a JSON object 458 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { 459 $properties = array_map(array($this, 'name_value'), 460 array_keys($var), 461 array_values($var)); 462 463 foreach($properties as $property) { 464 if(Services_JSON::isError($property)) { 465 return $property; 466 } 467 } 468 469 return '{' . join(',', $properties) . '}'; 470 } 471 472 // treat it like a regular array 473 $elements = array_map(array($this, '_encode'), $var); 474 475 foreach($elements as $element) { 476 if(Services_JSON::isError($element)) { 477 return $element; 478 } 479 } 480 481 return '[' . join(',', $elements) . ']'; 482 483 case 'object': 484 485 // support toJSON methods. 486 if (($this->use & SERVICES_JSON_USE_TO_JSON) && method_exists($var, 'toJSON')) { 487 // this may end up allowing unlimited recursion 488 // so we check the return value to make sure it's not got the same method. 489 $recode = $var->toJSON(); 490 491 if (method_exists($recode, 'toJSON')) { 492 493 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 494 ? 'null' 495 : new Services_JSON_Error(class_name($var). 496 " toJSON returned an object with a toJSON method."); 497 498 } 499 500 return $this->_encode( $recode ); 501 } 502 503 $vars = get_object_vars($var); 504 505 $properties = array_map(array($this, 'name_value'), 506 array_keys($vars), 507 array_values($vars)); 508 509 foreach($properties as $property) { 510 if(Services_JSON::isError($property)) { 511 return $property; 512 } 513 } 514 515 return '{' . join(',', $properties) . '}'; 516 517 default: 518 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 519 ? 'null' 520 : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); 521 } 522 } 523 524 /** 525 * array-walking function for use in generating JSON-formatted name-value pairs 526 * 527 * @param string $name name of key to use 528 * @param mixed $value reference to an array element to be encoded 529 * 530 * @return string JSON-formatted name-value pair, like '"name":value' 531 * @access private 532 */ 533 function name_value($name, $value) 534 { 535 $encoded_value = $this->_encode($value); 536 537 if(Services_JSON::isError($encoded_value)) { 538 return $encoded_value; 539 } 540 541 return $this->_encode(strval($name)) . ':' . $encoded_value; 542 } 543 544 /** 545 * reduce a string by removing leading and trailing comments and whitespace 546 * 547 * @param $str string string value to strip of comments and whitespace 548 * 549 * @return string string value stripped of comments and whitespace 550 * @access private 551 */ 552 function reduce_string($str) 553 { 554 $str = preg_replace(array( 555 556 // eliminate single line comments in '// ...' form 557 '#^\s*//(.+)$#m', 558 559 // eliminate multi-line comments in '/* ... */' form, at start of string 560 '#^\s*/\*(.+)\*/#Us', 561 562 // eliminate multi-line comments in '/* ... */' form, at end of string 563 '#/\*(.+)\*/\s*$#Us' 564 565 ), '', $str); 566 567 // eliminate extraneous space 568 return trim($str); 569 } 570 571 /** 572 * decodes a JSON string into appropriate variable 573 * 574 * @param string $str JSON-formatted string 575 * 576 * @return mixed number, boolean, string, array, or object 577 * corresponding to given JSON input string. 578 * See argument 1 to Services_JSON() above for object-output behavior. 579 * Note that decode() always returns strings 580 * in ASCII or UTF-8 format! 581 * @access public 582 */ 583 function decode($str) 584 { 585 $str = $this->reduce_string($str); 586 587 switch (strtolower($str)) { 588 case 'true': 589 return true; 590 591 case 'false': 592 return false; 593 594 case 'null': 595 return null; 596 597 default: 598 $m = array(); 599 600 if (is_numeric($str)) { 601 // Lookie-loo, it's a number 602 603 // This would work on its own, but I'm trying to be 604 // good about returning integers where appropriate: 605 // return (float)$str; 606 607 // Return float or int, as appropriate 608 return ((float)$str == (integer)$str) 609 ? (integer)$str 610 : (float)$str; 611 612 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { 613 // STRINGS RETURNED IN UTF-8 FORMAT 614 $delim = $this->substr8($str, 0, 1); 615 $chrs = $this->substr8($str, 1, -1); 616 $utf8 = ''; 617 $strlen_chrs = $this->strlen8($chrs); 618 619 for ($c = 0; $c < $strlen_chrs; ++$c) { 620 621 $substr_chrs_c_2 = $this->substr8($chrs, $c, 2); 622 $ord_chrs_c = ord($chrs{$c}); 623 624 switch (true) { 625 case $substr_chrs_c_2 == '\b': 626 $utf8 .= chr(0x08); 627 ++$c; 628 break; 629 case $substr_chrs_c_2 == '\t': 630 $utf8 .= chr(0x09); 631 ++$c; 632 break; 633 case $substr_chrs_c_2 == '\n': 634 $utf8 .= chr(0x0A); 635 ++$c; 636 break; 637 case $substr_chrs_c_2 == '\f': 638 $utf8 .= chr(0x0C); 639 ++$c; 640 break; 641 case $substr_chrs_c_2 == '\r': 642 $utf8 .= chr(0x0D); 643 ++$c; 644 break; 645 646 case $substr_chrs_c_2 == '\\"': 647 case $substr_chrs_c_2 == '\\\'': 648 case $substr_chrs_c_2 == '\\\\': 649 case $substr_chrs_c_2 == '\\/': 650 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || 651 ($delim == "'" && $substr_chrs_c_2 != '\\"')) { 652 $utf8 .= $chrs{++$c}; 653 } 654 break; 655 656 case preg_match('/\\\u[0-9A-F]{4}/i', $this->substr8($chrs, $c, 6)): 657 // single, escaped unicode character 658 $utf16 = chr(hexdec($this->substr8($chrs, ($c + 2), 2))) 659 . chr(hexdec($this->substr8($chrs, ($c + 4), 2))); 660 $utf8 .= $this->utf162utf8($utf16); 661 $c += 5; 662 break; 663 664 case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): 665 $utf8 .= $chrs{$c}; 666 break; 667 668 case ($ord_chrs_c & 0xE0) == 0xC0: 669 // characters U-00000080 - U-000007FF, mask 110XXXXX 670 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 671 $utf8 .= $this->substr8($chrs, $c, 2); 672 ++$c; 673 break; 674 675 case ($ord_chrs_c & 0xF0) == 0xE0: 676 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 677 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 678 $utf8 .= $this->substr8($chrs, $c, 3); 679 $c += 2; 680 break; 681 682 case ($ord_chrs_c & 0xF8) == 0xF0: 683 // characters U-00010000 - U-001FFFFF, mask 11110XXX 684 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 685 $utf8 .= $this->substr8($chrs, $c, 4); 686 $c += 3; 687 break; 688 689 case ($ord_chrs_c & 0xFC) == 0xF8: 690 // characters U-00200000 - U-03FFFFFF, mask 111110XX 691 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 692 $utf8 .= $this->substr8($chrs, $c, 5); 693 $c += 4; 694 break; 695 696 case ($ord_chrs_c & 0xFE) == 0xFC: 697 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 698 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 699 $utf8 .= $this->substr8($chrs, $c, 6); 700 $c += 5; 701 break; 702 703 } 704 705 } 706 707 return $utf8; 708 709 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { 710 // array, or object notation 711 712 if ($str{0} == '[') { 713 $stk = array(SERVICES_JSON_IN_ARR); 714 $arr = array(); 715 } else { 716 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 717 $stk = array(SERVICES_JSON_IN_OBJ); 718 $obj = array(); 719 } else { 720 $stk = array(SERVICES_JSON_IN_OBJ); 721 $obj = new stdClass(); 722 } 723 } 724 725 array_push($stk, array('what' => SERVICES_JSON_SLICE, 726 'where' => 0, 727 'delim' => false)); 728 729 $chrs = $this->substr8($str, 1, -1); 730 $chrs = $this->reduce_string($chrs); 731 732 if ($chrs == '') { 733 if (reset($stk) == SERVICES_JSON_IN_ARR) { 734 return $arr; 735 736 } else { 737 return $obj; 738 739 } 740 } 741 742 //print("\nparsing {$chrs}\n"); 743 744 $strlen_chrs = $this->strlen8($chrs); 745 746 for ($c = 0; $c <= $strlen_chrs; ++$c) { 747 748 $top = end($stk); 749 $substr_chrs_c_2 = $this->substr8($chrs, $c, 2); 750 751 if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { 752 // found a comma that is not inside a string, array, etc., 753 // OR we've reached the end of the character list 754 $slice = $this->substr8($chrs, $top['where'], ($c - $top['where'])); 755 array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); 756 //print("Found split at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 757 758 if (reset($stk) == SERVICES_JSON_IN_ARR) { 759 // we are in an array, so just push an element onto the stack 760 array_push($arr, $this->decode($slice)); 761 762 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 763 // we are in an object, so figure 764 // out the property name and set an 765 // element in an associative array, 766 // for now 767 $parts = array(); 768 769 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:/Uis', $slice, $parts)) { 770 // "name":value pair 771 $key = $this->decode($parts[1]); 772 $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); 773 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 774 $obj[$key] = $val; 775 } else { 776 $obj->$key = $val; 777 } 778 } elseif (preg_match('/^\s*(\w+)\s*:/Uis', $slice, $parts)) { 779 // name:value pair, where name is unquoted 780 $key = $parts[1]; 781 $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); 782 783 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 784 $obj[$key] = $val; 785 } else { 786 $obj->$key = $val; 787 } 788 } 789 790 } 791 792 } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { 793 // found a quote, and we are not inside a string 794 array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); 795 //print("Found start of string at {$c}\n"); 796 797 } elseif (($chrs{$c} == $top['delim']) && 798 ($top['what'] == SERVICES_JSON_IN_STR) && 799 (($this->strlen8($this->substr8($chrs, 0, $c)) - $this->strlen8(rtrim($this->substr8($chrs, 0, $c), '\\'))) % 2 != 1)) { 800 // found a quote, we're in a string, and it's not escaped 801 // we know that it's not escaped becase there is _not_ an 802 // odd number of backslashes at the end of the string so far 803 array_pop($stk); 804 //print("Found end of string at {$c}: ".$this->substr8($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); 805 806 } elseif (($chrs{$c} == '[') && 807 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 808 // found a left-bracket, and we are in an array, object, or slice 809 array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); 810 //print("Found start of array at {$c}\n"); 811 812 } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { 813 // found a right-bracket, and we're in an array 814 array_pop($stk); 815 //print("Found end of array at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 816 817 } elseif (($chrs{$c} == '{') && 818 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 819 // found a left-brace, and we are in an array, object, or slice 820 array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); 821 //print("Found start of object at {$c}\n"); 822 823 } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { 824 // found a right-brace, and we're in an object 825 array_pop($stk); 826 //print("Found end of object at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 827 828 } elseif (($substr_chrs_c_2 == '/*') && 829 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 830 // found a comment start, and we are in an array, object, or slice 831 array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); 832 $c++; 833 //print("Found start of comment at {$c}\n"); 834 835 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { 836 // found a comment end, and we're in one now 837 array_pop($stk); 838 $c++; 839 840 for ($i = $top['where']; $i <= $c; ++$i) 841 $chrs = substr_replace($chrs, ' ', $i, 1); 842 843 //print("Found end of comment at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 844 845 } 846 847 } 848 849 if (reset($stk) == SERVICES_JSON_IN_ARR) { 850 return $arr; 851 852 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 853 return $obj; 854 855 } 856 857 } 858 } 859 } 860 861 /** 862 * @todo Ultimately, this should just call PEAR::isError() 863 */ 864 function isError($data, $code = null) 865 { 866 if (class_exists('pear')) { 867 return PEAR::isError($data, $code); 868 } elseif (is_object($data) && (get_class($data) == 'services_json_error' || 869 is_subclass_of($data, 'services_json_error'))) { 870 return true; 871 } 872 873 return false; 874 } 875 876 /** 877 * Calculates length of string in bytes 878 * @param string 879 * @return integer length 880 */ 881 function strlen8( $str ) 882 { 883 if ( $this->_mb_strlen ) { 884 return mb_strlen( $str, "8bit" ); 885 } 886 return strlen( $str ); 887 } 888 889 /** 890 * Returns part of a string, interpreting $start and $length as number of bytes. 891 * @param string 892 * @param integer start 893 * @param integer length 894 * @return integer length 895 */ 896 function substr8( $string, $start, $length=false ) 897 { 898 if ( $length === false ) { 899 $length = $this->strlen8( $string ) - $start; 900 } 901 if ( $this->_mb_substr ) { 902 return mb_substr( $string, $start, $length, "8bit" ); 903 } 904 return substr( $string, $start, $length ); 905 } 906 834 907 } 835 908 836 909 if (class_exists('PEAR_Error')) { 837 910 838 839 840 841 842 843 844 845 911 class Services_JSON_Error extends PEAR_Error 912 { 913 function Services_JSON_Error($message = 'unknown error', $code = null, 914 $mode = null, $options = null, $userinfo = null) 915 { 916 parent::PEAR_Error($message, $code, $mode, $options, $userinfo); 917 } 918 } 846 919 847 920 } else { 848 921 849 850 851 852 853 854 855 856 857 858 859 860 922 /** 923 * @todo Ultimately, this class shall be descended from PEAR_Error 924 */ 925 class Services_JSON_Error 926 { 927 function Services_JSON_Error($message = 'unknown error', $code = null, 928 $mode = null, $options = null, $userinfo = null) 929 { 930 931 } 932 } 933 861 934 } 935 862 936 endif;
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