Changeset 11877
- Timestamp:
- 08/25/2009 08:11:07 AM (15 years ago)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
trunk/wp-includes/class-json.php
r11875 r11877 46 46 * 47 47 * @category 48 * @package 49 * @author 50 * @author 51 * @author 52 * @copyright 53 * @version 54 * @license 55 * @link 48 * @package Services_JSON 49 * @author Michal Migurski <mike-json@teczno.com> 50 * @author Matt Knapp <mdknapp[at]gmail[dot]com> 51 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> 52 * @copyright 2005 Michal Migurski 53 * @version CVS: $Id: JSON.php,v 1.3 2009/05/22 23:51:00 alan_k Exp $ 54 * @license http://www.opensource.org/licenses/bsd-license.php 55 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 56 56 */ 57 57 … … 59 59 * Marker constant for Services_JSON::decode(), used to flag stack state 60 60 */ 61 define('SERVICES_JSON_SLICE', 61 define('SERVICES_JSON_SLICE', 1); 62 62 63 63 /** … … 114 114 class Services_JSON 115 115 { 116 117 118 119 * @param int $useobject behavior flags; combine with boolean-OR120 121 *possible values:122 *- SERVICES_JSON_LOOSE_TYPE: loose typing.123 *"{...}" syntax creates associative arrays124 *instead of objects in decode().125 *- SERVICES_JSON_SUPPRESS_ERRORS: error suppression.126 *Values which can't be encoded (e.g. resources)127 *appear as NULL instead of throwing errors.128 *By default, a deeply-nested resource will129 *bubble up with an error, so all return values130 *from encode() should be checked with isError()131 132 133 134 135 136 137 138 139 140 141 142 143 144 * @paramstring $utf16 UTF-16 character145 * @returnstring UTF-8 character146 * @accessprivate147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 * @param string $utf8UTF-8 character189 * @returnstring UTF-16 character190 * @accessprivate191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 * @param mixed $varany number, boolean, string, array, or object to be encoded.229 *see argument 1 to Services_JSON() above for array-parsing behavior.230 *if var is a strng, note that encode() always expects it231 *to be in ASCII or UTF-8 format!232 233 * @return mixedJSON string representation of input var or an error if a problem occurs234 * @accesspublic235 236 237 238 239 240 241 242 243 244 * @param mixed $varany number, boolean, string, array, or object to be encoded.245 *see argument 1 to Services_JSON() above for array-parsing behavior.246 *if var is a strng, note that encode() always expects it247 *to be in ASCII or UTF-8 format!248 249 * @return mixedJSON string representation of input var or an error if a problem occurs250 * @accesspublic251 252 253 254 255 256 257 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 258 259 * @param mixed $varany number, boolean, string, array, or object to be encoded.260 *see argument 1 to Services_JSON() above for array-parsing behavior.261 *if var is a strng, note that encode() always expects it262 *to be in ASCII or UTF-8 format!263 264 * @return mixedJSON string representation of input var or an error if a problem occurs265 * @accesspublic266 267 function _encode($var) 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 * @param string $namename of key to use485 * @param mixed$value reference to an array element to be encoded486 487 * @returnstring JSON-formatted name-value pair, like '"name":value'488 * @accessprivate489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 * @param $str stringstring value to strip of comments and whitespace505 506 * @returnstring string value stripped of comments and whitespace507 * @accessprivate508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 * @param string $strJSON-formatted string532 533 * @return mixednumber, boolean, string, array, or object534 *corresponding to given JSON input string.535 *See argument 1 to Services_JSON() above for object-output behavior.536 *Note that decode() always returns strings537 *in ASCII or UTF-8 format!538 * @accesspublic539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 116 /** 117 * constructs a new JSON instance 118 * 119 * @param int $use object behavior flags; combine with boolean-OR 120 * 121 * possible values: 122 * - SERVICES_JSON_LOOSE_TYPE: loose typing. 123 * "{...}" syntax creates associative arrays 124 * instead of objects in decode(). 125 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. 126 * Values which can't be encoded (e.g. resources) 127 * appear as NULL instead of throwing errors. 128 * By default, a deeply-nested resource will 129 * bubble up with an error, so all return values 130 * from encode() should be checked with isError() 131 */ 132 function Services_JSON($use = 0) 133 { 134 $this->use = $use; 135 } 136 137 /** 138 * convert a string from one UTF-16 char to one UTF-8 char 139 * 140 * Normally should be handled by mb_convert_encoding, but 141 * provides a slower PHP-only method for installations 142 * that lack the multibye string extension. 143 * 144 * @param string $utf16 UTF-16 character 145 * @return string UTF-8 character 146 * @access private 147 */ 148 function utf162utf8($utf16) 149 { 150 // oh please oh please oh please oh please oh please 151 if(function_exists('mb_convert_encoding')) { 152 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); 153 } 154 155 $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); 156 157 switch(true) { 158 case ((0x7F & $bytes) == $bytes): 159 // this case should never be reached, because we are in ASCII range 160 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 161 return chr(0x7F & $bytes); 162 163 case (0x07FF & $bytes) == $bytes: 164 // return a 2-byte UTF-8 character 165 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 166 return chr(0xC0 | (($bytes >> 6) & 0x1F)) 167 . chr(0x80 | ($bytes & 0x3F)); 168 169 case (0xFFFF & $bytes) == $bytes: 170 // return a 3-byte UTF-8 character 171 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 172 return chr(0xE0 | (($bytes >> 12) & 0x0F)) 173 . chr(0x80 | (($bytes >> 6) & 0x3F)) 174 . chr(0x80 | ($bytes & 0x3F)); 175 } 176 177 // ignoring UTF-32 for now, sorry 178 return ''; 179 } 180 181 /** 182 * convert a string from one UTF-8 char to one UTF-16 char 183 * 184 * Normally should be handled by mb_convert_encoding, but 185 * provides a slower PHP-only method for installations 186 * that lack the multibye string extension. 187 * 188 * @param string $utf8 UTF-8 character 189 * @return string UTF-16 character 190 * @access private 191 */ 192 function utf82utf16($utf8) 193 { 194 // oh please oh please oh please oh please oh please 195 if(function_exists('mb_convert_encoding')) { 196 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); 197 } 198 199 switch(strlen($utf8)) { 200 case 1: 201 // this case should never be reached, because we are in ASCII range 202 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 203 return $utf8; 204 205 case 2: 206 // return a UTF-16 character from a 2-byte UTF-8 char 207 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 208 return chr(0x07 & (ord($utf8{0}) >> 2)) 209 . chr((0xC0 & (ord($utf8{0}) << 6)) 210 | (0x3F & ord($utf8{1}))); 211 212 case 3: 213 // return a UTF-16 character from a 3-byte UTF-8 char 214 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 215 return chr((0xF0 & (ord($utf8{0}) << 4)) 216 | (0x0F & (ord($utf8{1}) >> 2))) 217 . chr((0xC0 & (ord($utf8{1}) << 6)) 218 | (0x7F & ord($utf8{2}))); 219 } 220 221 // ignoring UTF-32 for now, sorry 222 return ''; 223 } 224 225 /** 226 * encodes an arbitrary variable into JSON format (and sends JSON Header) 227 * 228 * @param mixed $var any number, boolean, string, array, or object to be encoded. 229 * see argument 1 to Services_JSON() above for array-parsing behavior. 230 * if var is a strng, note that encode() always expects it 231 * to be in ASCII or UTF-8 format! 232 * 233 * @return mixed JSON string representation of input var or an error if a problem occurs 234 * @access public 235 */ 236 function encode($var) 237 { 238 header('Content-type: application/x-javascript'); 239 return $this->_encode($var); 240 } 241 /** 242 * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow CSS!!!!) 243 * 244 * @param mixed $var any number, boolean, string, array, or object to be encoded. 245 * see argument 1 to Services_JSON() above for array-parsing behavior. 246 * if var is a strng, note that encode() always expects it 247 * to be in ASCII or UTF-8 format! 248 * 249 * @return mixed JSON string representation of input var or an error if a problem occurs 250 * @access public 251 */ 252 function encodeUnsafe($var) 253 { 254 return $this->_encode($var); 255 } 256 /** 257 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 258 * 259 * @param mixed $var any number, boolean, string, array, or object to be encoded. 260 * see argument 1 to Services_JSON() above for array-parsing behavior. 261 * if var is a strng, note that encode() always expects it 262 * to be in ASCII or UTF-8 format! 263 * 264 * @return mixed JSON string representation of input var or an error if a problem occurs 265 * @access public 266 */ 267 function _encode($var) 268 { 269 270 switch (gettype($var)) { 271 case 'boolean': 272 return $var ? 'true' : 'false'; 273 274 case 'NULL': 275 return 'null'; 276 277 case 'integer': 278 return (int) $var; 279 280 case 'double': 281 case 'float': 282 return (float) $var; 283 284 case 'string': 285 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT 286 $ascii = ''; 287 $strlen_var = strlen($var); 288 289 /* 290 * Iterate over every character in the string, 291 * escaping with a slash or encoding to UTF-8 where necessary 292 */ 293 for ($c = 0; $c < $strlen_var; ++$c) { 294 295 $ord_var_c = ord($var{$c}); 296 297 switch (true) { 298 case $ord_var_c == 0x08: 299 $ascii .= '\b'; 300 break; 301 case $ord_var_c == 0x09: 302 $ascii .= '\t'; 303 break; 304 case $ord_var_c == 0x0A: 305 $ascii .= '\n'; 306 break; 307 case $ord_var_c == 0x0C: 308 $ascii .= '\f'; 309 break; 310 case $ord_var_c == 0x0D: 311 $ascii .= '\r'; 312 break; 313 314 case $ord_var_c == 0x22: 315 case $ord_var_c == 0x2F: 316 case $ord_var_c == 0x5C: 317 // double quote, slash, slosh 318 $ascii .= '\\'.$var{$c}; 319 break; 320 321 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): 322 // characters U-00000000 - U-0000007F (same as ASCII) 323 $ascii .= $var{$c}; 324 break; 325 326 case (($ord_var_c & 0xE0) == 0xC0): 327 // characters U-00000080 - U-000007FF, mask 110XXXXX 328 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 329 if ($c+1 >= $strlen_var) { 330 $c += 1; 331 $ascii .= '?'; 332 break; 333 } 334 335 $char = pack('C*', $ord_var_c, ord($var{$c + 1})); 336 $c += 1; 337 $utf16 = $this->utf82utf16($char); 338 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 339 break; 340 341 case (($ord_var_c & 0xF0) == 0xE0): 342 if ($c+2 >= $strlen_var) { 343 $c += 2; 344 $ascii .= '?'; 345 break; 346 } 347 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 348 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 349 $char = pack('C*', $ord_var_c, 350 @ord($var{$c + 1}), 351 @ord($var{$c + 2})); 352 $c += 2; 353 $utf16 = $this->utf82utf16($char); 354 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 355 break; 356 357 case (($ord_var_c & 0xF8) == 0xF0): 358 if ($c+3 >= $strlen_var) { 359 $c += 3; 360 $ascii .= '?'; 361 break; 362 } 363 // characters U-00010000 - U-001FFFFF, mask 11110XXX 364 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 365 $char = pack('C*', $ord_var_c, 366 ord($var{$c + 1}), 367 ord($var{$c + 2}), 368 ord($var{$c + 3})); 369 $c += 3; 370 $utf16 = $this->utf82utf16($char); 371 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 372 break; 373 374 case (($ord_var_c & 0xFC) == 0xF8): 375 // characters U-00200000 - U-03FFFFFF, mask 111110XX 376 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 377 if ($c+4 >= $strlen_var) { 378 $c += 4; 379 $ascii .= '?'; 380 break; 381 } 382 $char = pack('C*', $ord_var_c, 383 ord($var{$c + 1}), 384 ord($var{$c + 2}), 385 ord($var{$c + 3}), 386 ord($var{$c + 4})); 387 $c += 4; 388 $utf16 = $this->utf82utf16($char); 389 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 390 break; 391 392 case (($ord_var_c & 0xFE) == 0xFC): 393 if ($c+5 >= $strlen_var) { 394 $c += 5; 395 $ascii .= '?'; 396 break; 397 } 398 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 399 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 400 $char = pack('C*', $ord_var_c, 401 ord($var{$c + 1}), 402 ord($var{$c + 2}), 403 ord($var{$c + 3}), 404 ord($var{$c + 4}), 405 ord($var{$c + 5})); 406 $c += 5; 407 $utf16 = $this->utf82utf16($char); 408 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 409 break; 410 } 411 } 412 return '"'.$ascii.'"'; 413 414 case 'array': 415 /* 416 * As per JSON spec if any array key is not an integer 417 * we must treat the the whole array as an object. We 418 * also try to catch a sparsely populated associative 419 * array with numeric keys here because some JS engines 420 * will create an array with empty indexes up to 421 * max_index which can cause memory issues and because 422 * the keys, which may be relevant, will be remapped 423 * otherwise. 424 * 425 * As per the ECMA and JSON specification an object may 426 * have any string as a property. Unfortunately due to 427 * a hole in the ECMA specification if the key is a 428 * ECMA reserved word or starts with a digit the 429 * parameter is only accessible using ECMAScript's 430 * bracket notation. 431 */ 432 433 // treat as a JSON object 434 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { 435 $properties = array_map(array($this, 'name_value'), 436 array_keys($var), 437 array_values($var)); 438 439 foreach($properties as $property) { 440 if(Services_JSON::isError($property)) { 441 return $property; 442 } 443 } 444 445 return '{' . join(',', $properties) . '}'; 446 } 447 448 // treat it like a regular array 449 $elements = array_map(array($this, '_encode'), $var); 450 451 foreach($elements as $element) { 452 if(Services_JSON::isError($element)) { 453 return $element; 454 } 455 } 456 457 return '[' . join(',', $elements) . ']'; 458 459 case 'object': 460 $vars = get_object_vars($var); 461 462 $properties = array_map(array($this, 'name_value'), 463 array_keys($vars), 464 array_values($vars)); 465 466 foreach($properties as $property) { 467 if(Services_JSON::isError($property)) { 468 return $property; 469 } 470 } 471 472 return '{' . join(',', $properties) . '}'; 473 474 default: 475 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 476 ? 'null' 477 : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); 478 } 479 } 480 481 /** 482 * array-walking function for use in generating JSON-formatted name-value pairs 483 * 484 * @param string $name name of key to use 485 * @param mixed $value reference to an array element to be encoded 486 * 487 * @return string JSON-formatted name-value pair, like '"name":value' 488 * @access private 489 */ 490 function name_value($name, $value) 491 { 492 $encoded_value = $this->_encode($value); 493 494 if(Services_JSON::isError($encoded_value)) { 495 return $encoded_value; 496 } 497 498 return $this->_encode(strval($name)) . ':' . $encoded_value; 499 } 500 501 /** 502 * reduce a string by removing leading and trailing comments and whitespace 503 * 504 * @param $str string string value to strip of comments and whitespace 505 * 506 * @return string string value stripped of comments and whitespace 507 * @access private 508 */ 509 function reduce_string($str) 510 { 511 $str = preg_replace(array( 512 513 // eliminate single line comments in '// ...' form 514 '#^\s*//(.+)$#m', 515 516 // eliminate multi-line comments in '/* ... */' form, at start of string 517 '#^\s*/\*(.+)\*/#Us', 518 519 // eliminate multi-line comments in '/* ... */' form, at end of string 520 '#/\*(.+)\*/\s*$#Us' 521 522 ), '', $str); 523 524 // eliminate extraneous space 525 return trim($str); 526 } 527 528 /** 529 * decodes a JSON string into appropriate variable 530 * 531 * @param string $str JSON-formatted string 532 * 533 * @return mixed number, boolean, string, array, or object 534 * corresponding to given JSON input string. 535 * See argument 1 to Services_JSON() above for object-output behavior. 536 * Note that decode() always returns strings 537 * in ASCII or UTF-8 format! 538 * @access public 539 */ 540 function decode($str) 541 { 542 $str = $this->reduce_string($str); 543 544 switch (strtolower($str)) { 545 case 'true': 546 return true; 547 548 case 'false': 549 return false; 550 551 case 'null': 552 return null; 553 554 default: 555 $m = array(); 556 557 if (is_numeric($str)) { 558 // Lookie-loo, it's a number 559 560 // This would work on its own, but I'm trying to be 561 // good about returning integers where appropriate: 562 // return (float)$str; 563 564 // Return float or int, as appropriate 565 return ((float)$str == (integer)$str) 566 ? (integer)$str 567 : (float)$str; 568 569 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { 570 // STRINGS RETURNED IN UTF-8 FORMAT 571 $delim = substr($str, 0, 1); 572 $chrs = substr($str, 1, -1); 573 $utf8 = ''; 574 $strlen_chrs = strlen($chrs); 575 576 for ($c = 0; $c < $strlen_chrs; ++$c) { 577 578 $substr_chrs_c_2 = substr($chrs, $c, 2); 579 $ord_chrs_c = ord($chrs{$c}); 580 581 switch (true) { 582 case $substr_chrs_c_2 == '\b': 583 $utf8 .= chr(0x08); 584 ++$c; 585 break; 586 case $substr_chrs_c_2 == '\t': 587 $utf8 .= chr(0x09); 588 ++$c; 589 break; 590 case $substr_chrs_c_2 == '\n': 591 $utf8 .= chr(0x0A); 592 ++$c; 593 break; 594 case $substr_chrs_c_2 == '\f': 595 $utf8 .= chr(0x0C); 596 ++$c; 597 break; 598 case $substr_chrs_c_2 == '\r': 599 $utf8 .= chr(0x0D); 600 ++$c; 601 break; 602 603 case $substr_chrs_c_2 == '\\"': 604 case $substr_chrs_c_2 == '\\\'': 605 case $substr_chrs_c_2 == '\\\\': 606 case $substr_chrs_c_2 == '\\/': 607 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || 608 ($delim == "'" && $substr_chrs_c_2 != '\\"')) { 609 $utf8 .= $chrs{++$c}; 610 } 611 break; 612 613 case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): 614 // single, escaped unicode character 615 $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) 616 . chr(hexdec(substr($chrs, ($c + 4), 2))); 617 $utf8 .= $this->utf162utf8($utf16); 618 $c += 5; 619 break; 620 621 case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): 622 $utf8 .= $chrs{$c}; 623 break; 624 625 case ($ord_chrs_c & 0xE0) == 0xC0: 626 // characters U-00000080 - U-000007FF, mask 110XXXXX 627 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 628 $utf8 .= substr($chrs, $c, 2); 629 ++$c; 630 break; 631 632 case ($ord_chrs_c & 0xF0) == 0xE0: 633 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 634 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 635 $utf8 .= substr($chrs, $c, 3); 636 $c += 2; 637 break; 638 639 case ($ord_chrs_c & 0xF8) == 0xF0: 640 // characters U-00010000 - U-001FFFFF, mask 11110XXX 641 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 642 $utf8 .= substr($chrs, $c, 4); 643 $c += 3; 644 break; 645 646 case ($ord_chrs_c & 0xFC) == 0xF8: 647 // characters U-00200000 - U-03FFFFFF, mask 111110XX 648 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 649 $utf8 .= substr($chrs, $c, 5); 650 $c += 4; 651 break; 652 653 case ($ord_chrs_c & 0xFE) == 0xFC: 654 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 655 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 656 $utf8 .= substr($chrs, $c, 6); 657 $c += 5; 658 break; 659 660 } 661 662 } 663 664 return $utf8; 665 666 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { 667 // array, or object notation 668 669 if ($str{0} == '[') { 670 $stk = array(SERVICES_JSON_IN_ARR); 671 $arr = array(); 672 } else { 673 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 674 $stk = array(SERVICES_JSON_IN_OBJ); 675 $obj = array(); 676 } else { 677 $stk = array(SERVICES_JSON_IN_OBJ); 678 $obj = new stdClass(); 679 } 680 } 681 682 array_push($stk, array('what' => SERVICES_JSON_SLICE, 683 'where' => 0, 684 'delim' => false)); 685 686 $chrs = substr($str, 1, -1); 687 $chrs = $this->reduce_string($chrs); 688 689 if ($chrs == '') { 690 if (reset($stk) == SERVICES_JSON_IN_ARR) { 691 return $arr; 692 693 } else { 694 return $obj; 695 696 } 697 } 698 699 //print("\nparsing {$chrs}\n"); 700 701 $strlen_chrs = strlen($chrs); 702 703 for ($c = 0; $c <= $strlen_chrs; ++$c) { 704 705 $top = end($stk); 706 $substr_chrs_c_2 = substr($chrs, $c, 2); 707 708 if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { 709 // found a comma that is not inside a string, array, etc., 710 // OR we've reached the end of the character list 711 $slice = substr($chrs, $top['where'], ($c - $top['where'])); 712 array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); 713 //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 714 715 if (reset($stk) == SERVICES_JSON_IN_ARR) { 716 // we are in an array, so just push an element onto the stack 717 array_push($arr, $this->decode($slice)); 718 719 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 720 // we are in an object, so figure 721 // out the property name and set an 722 // element in an associative array, 723 // for now 724 $parts = array(); 725 726 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 727 // "name":value pair 728 $key = $this->decode($parts[1]); 729 $val = $this->decode($parts[2]); 730 731 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 732 $obj[$key] = $val; 733 } else { 734 $obj->$key = $val; 735 } 736 } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 737 // name:value pair, where name is unquoted 738 $key = $parts[1]; 739 $val = $this->decode($parts[2]); 740 741 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 742 $obj[$key] = $val; 743 } else { 744 $obj->$key = $val; 745 } 746 } 747 748 } 749 750 } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { 751 // found a quote, and we are not inside a string 752 array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); 753 //print("Found start of string at {$c}\n"); 754 755 } elseif (($chrs{$c} == $top['delim']) && 756 ($top['what'] == SERVICES_JSON_IN_STR) && 757 ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) { 758 // found a quote, we're in a string, and it's not escaped 759 // we know that it's not escaped becase there is _not_ an 760 // odd number of backslashes at the end of the string so far 761 array_pop($stk); 762 //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); 763 764 } elseif (($chrs{$c} == '[') && 765 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 766 // found a left-bracket, and we are in an array, object, or slice 767 array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); 768 //print("Found start of array at {$c}\n"); 769 770 } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { 771 // found a right-bracket, and we're in an array 772 array_pop($stk); 773 //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 774 775 } elseif (($chrs{$c} == '{') && 776 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 777 // found a left-brace, and we are in an array, object, or slice 778 array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); 779 //print("Found start of object at {$c}\n"); 780 781 } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { 782 // found a right-brace, and we're in an object 783 array_pop($stk); 784 //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 785 786 } elseif (($substr_chrs_c_2 == '/*') && 787 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 788 // found a comment start, and we are in an array, object, or slice 789 array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); 790 $c++; 791 //print("Found start of comment at {$c}\n"); 792 793 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { 794 // found a comment end, and we're in one now 795 array_pop($stk); 796 $c++; 797 798 for ($i = $top['where']; $i <= $c; ++$i) 799 $chrs = substr_replace($chrs, ' ', $i, 1); 800 801 //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 802 803 } 804 805 } 806 807 if (reset($stk) == SERVICES_JSON_IN_ARR) { 808 return $arr; 809 810 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 811 return $obj; 812 813 } 814 815 } 816 } 817 } 818 819 /** 820 * @todo Ultimately, this should just call PEAR::isError() 821 */ 822 function isError($data, $code = null) 823 { 824 if (class_exists('pear')) { 825 return PEAR::isError($data, $code); 826 } elseif (is_object($data) && (get_class($data) == 'services_json_error' || 827 is_subclass_of($data, 'services_json_error'))) { 828 return true; 829 } 830 831 return false; 832 } 833 833 } 834 834 835 835 if (class_exists('PEAR_Error')) { 836 836 837 838 839 840 841 842 843 844 837 class Services_JSON_Error extends PEAR_Error 838 { 839 function Services_JSON_Error($message = 'unknown error', $code = null, 840 $mode = null, $options = null, $userinfo = null) 841 { 842 parent::PEAR_Error($message, $code, $mode, $options, $userinfo); 843 } 844 } 845 845 846 846 } else { 847 847 848 849 850 851 852 853 854 855 856 857 858 848 /** 849 * @todo Ultimately, this class shall be descended from PEAR_Error 850 */ 851 class Services_JSON_Error 852 { 853 function Services_JSON_Error($message = 'unknown error', $code = null, 854 $mode = null, $options = null, $userinfo = null) 855 { 856 857 } 858 } 859 859 860 860 } 861
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