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/upload/libraries/JSON.php

https://github.com/sahilbabu/phpb2b
PHP | 808 lines | 442 code | 112 blank | 254 comment | 99 complexity | bf27210d14c3178ce82974c24e050630 MD5 | raw file
  1<?php
  2/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
  3
  4/**
  5 * Converts to and from JSON format.
  6 *
  7 * JSON (JavaScript Object Notation) is a lightweight data-interchange
  8 * format. It is easy for humans to read and write. It is easy for machines
  9 * to parse and generate. It is based on a subset of the JavaScript
 10 * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
 11 * This feature can also be found in  Python. JSON is a text format that is
 12 * completely language independent but uses conventions that are familiar
 13 * to programmers of the C-family of languages, including C, C++, C#, Java,
 14 * JavaScript, Perl, TCL, and many others. These properties make JSON an
 15 * ideal data-interchange language.
 16 *
 17 * This package provides a simple encoder and decoder for JSON notation. It
 18 * is intended for use with client-side Javascript applications that make
 19 * use of HTTPRequest to perform server communication functions - data can
 20 * be encoded into JSON notation for use in a client-side javascript, or
 21 * decoded from incoming Javascript requests. JSON format is native to
 22 * Javascript, and can be directly eval()'ed with no further parsing
 23 * overhead
 24 *
 25 * All strings should be in ASCII or UTF-8 format!
 26 *
 27 * LICENSE: Redistribution and use in source and binary forms, with or
 28 * without modification, are permitted provided that the following
 29 * conditions are met: Redistributions of source code must retain the
 30 * above copyright notice, this list of conditions and the following
 31 * disclaimer. Redistributions in binary form must reproduce the above
 32 * copyright notice, this list of conditions and the following disclaimer
 33 * in the documentation and/or other materials provided with the
 34 * distribution.
 35 *
 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 38 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 39 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 41 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 42 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 45 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 46 * DAMAGE.
 47 *
 48 * @category
 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 420 2009-12-26 13:37:06Z cht117 $
 55 * @license     http://www.opensource.org/licenses/bsd-license.php
 56 * @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
 57 */
 58
 59/**
 60 * Marker constant for Services_JSON::decode(), used to flag stack state
 61 */
 62define('SERVICES_JSON_SLICE',   1);
 63
 64/**
 65 * Marker constant for Services_JSON::decode(), used to flag stack state
 66 */
 67define('SERVICES_JSON_IN_STR',  2);
 68
 69/**
 70 * Marker constant for Services_JSON::decode(), used to flag stack state
 71 */
 72define('SERVICES_JSON_IN_ARR',  3);
 73
 74/**
 75 * Marker constant for Services_JSON::decode(), used to flag stack state
 76 */
 77define('SERVICES_JSON_IN_OBJ',  4);
 78
 79/**
 80 * Marker constant for Services_JSON::decode(), used to flag stack state
 81 */
 82define('SERVICES_JSON_IN_CMT', 5);
 83
 84/**
 85 * Behavior switch for Services_JSON::decode()
 86 */
 87define('SERVICES_JSON_LOOSE_TYPE', 16);
 88
 89/**
 90 * Behavior switch for Services_JSON::decode()
 91 */
 92define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
 93
 94/**
 95 * Converts to and from JSON format.
 96 *
 97 * Brief example of use:
 98 *
 99 * <code>
100 * // create a new instance of Services_JSON
101 * $json = new Services_JSON();
102 *
103 * // convert a complexe value to JSON notation, and send it to the browser
104 * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
105 * $output = $json->encode($value);
106 *
107 * print($output);
108 * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
109 *
110 * // accept incoming POST data, assumed to be in JSON notation
111 * $input = file_get_contents('php://input', 1000000);
112 * $value = $json->decode($input);
113 * </code>
114 */
115if (!class_exists('Services_JSON')) {
116class Services_JSON
117{
118   /**
119    * constructs a new JSON instance
120    *
121    * @param    int     $use    object behavior flags; combine with boolean-OR
122    *
123    *                           possible values:
124    *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
125    *                                   "{...}" syntax creates associative arrays
126    *                                   instead of objects in decode().
127    *                           - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
128    *                                   Values which can't be encoded (e.g. resources)
129    *                                   appear as NULL instead of throwing errors.
130    *                                   By default, a deeply-nested resource will
131    *                                   bubble up with an error, so all return values
132    *                                   from encode() should be checked with isError()
133    */
134    function Services_JSON($use = 0)
135    {
136        $this->use = $use;
137    }
138
139   /**
140    * convert a string from one UTF-16 char to one UTF-8 char
141    *
142    * Normally should be handled by mb_convert_encoding, but
143    * provides a slower PHP-only method for installations
144    * that lack the multibye string extension.
145    *
146    * @param    string  $utf16  UTF-16 character
147    * @return   string  UTF-8 character
148    * @access   private
149    */
150    function utf162utf8($utf16)
151    {
152        // oh please oh please oh please oh please oh please
153        if(function_exists('mb_convert_encoding')) {
154            return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
155        }
156
157        $bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
158
159        switch(true) {
160            case ((0x7F & $bytes) == $bytes):
161                // this case should never be reached, because we are in ASCII range
162                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
163                return chr(0x7F & $bytes);
164
165            case (0x07FF & $bytes) == $bytes:
166                // return a 2-byte UTF-8 character
167                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
168                return chr(0xC0 | (($bytes >> 6) & 0x1F))
169                     . chr(0x80 | ($bytes & 0x3F));
170
171            case (0xFFFF & $bytes) == $bytes:
172                // return a 3-byte UTF-8 character
173                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
174                return chr(0xE0 | (($bytes >> 12) & 0x0F))
175                     . chr(0x80 | (($bytes >> 6) & 0x3F))
176                     . chr(0x80 | ($bytes & 0x3F));
177        }
178
179        // ignoring UTF-32 for now, sorry
180        return '';
181    }
182
183   /**
184    * convert a string from one UTF-8 char to one UTF-16 char
185    *
186    * Normally should be handled by mb_convert_encoding, but
187    * provides a slower PHP-only method for installations
188    * that lack the multibye string extension.
189    *
190    * @param    string  $utf8   UTF-8 character
191    * @return   string  UTF-16 character
192    * @access   private
193    */
194    function utf82utf16($utf8)
195    {
196        // oh please oh please oh please oh please oh please
197        if(function_exists('mb_convert_encoding')) {
198            return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
199        }
200
201        switch(strlen($utf8)) {
202            case 1:
203                // this case should never be reached, because we are in ASCII range
204                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
205                return $utf8;
206
207            case 2:
208                // return a UTF-16 character from a 2-byte UTF-8 char
209                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
210                return chr(0x07 & (ord($utf8{0}) >> 2))
211                     . chr((0xC0 & (ord($utf8{0}) << 6))
212                         | (0x3F & ord($utf8{1})));
213
214            case 3:
215                // return a UTF-16 character from a 3-byte UTF-8 char
216                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
217                return chr((0xF0 & (ord($utf8{0}) << 4))
218                         | (0x0F & (ord($utf8{1}) >> 2)))
219                     . chr((0xC0 & (ord($utf8{1}) << 6))
220                         | (0x7F & ord($utf8{2})));
221        }
222
223        // ignoring UTF-32 for now, sorry
224        return '';
225    }
226
227   /**
228    * encodes an arbitrary variable into JSON format
229    *
230    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
231    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
232    *                           if var is a strng, note that encode() always expects it
233    *                           to be in ASCII or UTF-8 format!
234    *
235    * @return   mixed   JSON string representation of input var or an error if a problem occurs
236    * @access   public
237    */
238    function encode($var)
239    {
240        switch (gettype($var)) {
241            case 'boolean':
242                return $var ? 'true' : 'false';
243
244            case 'NULL':
245                return 'null';
246
247            case 'integer':
248                return (int) $var;
249
250            case 'double':
251            case 'float':
252                return (float) $var;
253
254            case 'string':
255                // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
256                $ascii = '';
257                $strlen_var = strlen($var);
258
259               /*
260                * Iterate over every character in the string,
261                * escaping with a slash or encoding to UTF-8 where necessary
262                */
263                for ($c = 0; $c < $strlen_var; ++$c) {
264
265                    $ord_var_c = ord($var{$c});
266
267                    switch (true) {
268                        case $ord_var_c == 0x08:
269                            $ascii .= '\b';
270                            break;
271                        case $ord_var_c == 0x09:
272                            $ascii .= '\t';
273                            break;
274                        case $ord_var_c == 0x0A:
275                            $ascii .= '\n';
276                            break;
277                        case $ord_var_c == 0x0C:
278                            $ascii .= '\f';
279                            break;
280                        case $ord_var_c == 0x0D:
281                            $ascii .= '\r';
282                            break;
283
284                        case $ord_var_c == 0x22:
285                        case $ord_var_c == 0x2F:
286                        case $ord_var_c == 0x5C:
287                            // double quote, slash, slosh
288                            $ascii .= '\\'.$var{$c};
289                            break;
290
291                        case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
292                            // characters U-00000000 - U-0000007F (same as ASCII)
293                            $ascii .= $var{$c};
294                            break;
295
296                        case (($ord_var_c & 0xE0) == 0xC0):
297                            // characters U-00000080 - U-000007FF, mask 110XXXXX
298                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
299                            $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
300                            $c += 1;
301                            $utf16 = $this->utf82utf16($char);
302                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
303                            break;
304
305                        case (($ord_var_c & 0xF0) == 0xE0):
306                            // characters U-00000800 - U-0000FFFF, mask 1110XXXX
307                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
308                            $char = pack('C*', $ord_var_c,
309                                         ord($var{$c + 1}),
310                                         ord($var{$c + 2}));
311                            $c += 2;
312                            $utf16 = $this->utf82utf16($char);
313                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
314                            break;
315
316                        case (($ord_var_c & 0xF8) == 0xF0):
317                            // characters U-00010000 - U-001FFFFF, mask 11110XXX
318                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
319                            $char = pack('C*', $ord_var_c,
320                                         ord($var{$c + 1}),
321                                         ord($var{$c + 2}),
322                                         ord($var{$c + 3}));
323                            $c += 3;
324                            $utf16 = $this->utf82utf16($char);
325                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
326                            break;
327
328                        case (($ord_var_c & 0xFC) == 0xF8):
329                            // characters U-00200000 - U-03FFFFFF, mask 111110XX
330                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
331                            $char = pack('C*', $ord_var_c,
332                                         ord($var{$c + 1}),
333                                         ord($var{$c + 2}),
334                                         ord($var{$c + 3}),
335                                         ord($var{$c + 4}));
336                            $c += 4;
337                            $utf16 = $this->utf82utf16($char);
338                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
339                            break;
340
341                        case (($ord_var_c & 0xFE) == 0xFC):
342                            // characters U-04000000 - U-7FFFFFFF, mask 1111110X
343                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
344                            $char = pack('C*', $ord_var_c,
345                                         ord($var{$c + 1}),
346                                         ord($var{$c + 2}),
347                                         ord($var{$c + 3}),
348                                         ord($var{$c + 4}),
349                                         ord($var{$c + 5}));
350                            $c += 5;
351                            $utf16 = $this->utf82utf16($char);
352                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
353                            break;
354                    }
355                }
356
357                return '"'.$ascii.'"';
358
359            case 'array':
360               /*
361                * As per JSON spec if any array key is not an integer
362                * we must treat the the whole array as an object. We
363                * also try to catch a sparsely populated associative
364                * array with numeric keys here because some JS engines
365                * will create an array with empty indexes up to
366                * max_index which can cause memory issues and because
367                * the keys, which may be relevant, will be remapped
368                * otherwise.
369                *
370                * As per the ECMA and JSON specification an object may
371                * have any string as a property. Unfortunately due to
372                * a hole in the ECMA specification if the key is a
373                * ECMA reserved word or starts with a digit the
374                * parameter is only accessible using ECMAScript's
375                * bracket notation.
376                */
377
378                // treat as a JSON object
379                if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
380                    $properties = array_map(array($this, 'name_value'),
381                                            array_keys($var),
382                                            array_values($var));
383
384                    foreach($properties as $property) {
385                        if(Services_JSON::isError($property)) {
386                            return $property;
387                        }
388                    }
389
390                    return '{' . join(',', $properties) . '}';
391                }
392
393                // treat it like a regular array
394                $elements = array_map(array($this, 'encode'), $var);
395
396                foreach($elements as $element) {
397                    if(Services_JSON::isError($element)) {
398                        return $element;
399                    }
400                }
401
402                return '[' . join(',', $elements) . ']';
403
404            case 'object':
405                $vars = get_object_vars($var);
406
407                $properties = array_map(array($this, 'name_value'),
408                                        array_keys($vars),
409                                        array_values($vars));
410
411                foreach($properties as $property) {
412                    if(Services_JSON::isError($property)) {
413                        return $property;
414                    }
415                }
416
417                return '{' . join(',', $properties) . '}';
418
419            default:
420                return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
421                    ? 'null'
422                    : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
423        }
424    }
425
426   /**
427    * array-walking function for use in generating JSON-formatted name-value pairs
428    *
429    * @param    string  $name   name of key to use
430    * @param    mixed   $value  reference to an array element to be encoded
431    *
432    * @return   string  JSON-formatted name-value pair, like '"name":value'
433    * @access   private
434    */
435    function name_value($name, $value)
436    {
437        $encoded_value = $this->encode($value);
438
439        if(Services_JSON::isError($encoded_value)) {
440            return $encoded_value;
441        }
442
443        return $this->encode(strval($name)) . ':' . $encoded_value;
444    }
445
446   /**
447    * reduce a string by removing leading and trailing comments and whitespace
448    *
449    * @param    $str    string      string value to strip of comments and whitespace
450    *
451    * @return   string  string value stripped of comments and whitespace
452    * @access   private
453    */
454    function reduce_string($str)
455    {
456        $str = preg_replace(array(
457
458                // eliminate single line comments in '// ...' form
459                '#^\s*//(.+)$#m',
460
461                // eliminate multi-line comments in '/* ... */' form, at start of string
462                '#^\s*/\*(.+)\*/#Us',
463
464                // eliminate multi-line comments in '/* ... */' form, at end of string
465                '#/\*(.+)\*/\s*$#Us'
466
467            ), '', $str);
468
469        // eliminate extraneous space
470        return trim($str);
471    }
472
473   /**
474    * decodes a JSON string into appropriate variable
475    *
476    * @param    string  $str    JSON-formatted string
477    *
478    * @return   mixed   number, boolean, string, array, or object
479    *                   corresponding to given JSON input string.
480    *                   See argument 1 to Services_JSON() above for object-output behavior.
481    *                   Note that decode() always returns strings
482    *                   in ASCII or UTF-8 format!
483    * @access   public
484    */
485    function decode($str)
486    {
487        $str = $this->reduce_string($str);
488
489        switch (strtolower($str)) {
490            case 'true':
491                return true;
492
493            case 'false':
494                return false;
495
496            case 'null':
497                return null;
498
499            default:
500                $m = array();
501
502                if (is_numeric($str)) {
503                    // Lookie-loo, it's a number
504
505                    // This would work on its own, but I'm trying to be
506                    // good about returning integers where appropriate:
507                    // return (float)$str;
508
509                    // Return float or int, as appropriate
510                    return ((float)$str == (integer)$str)
511                        ? (integer)$str
512                        : (float)$str;
513
514                } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
515                    // STRINGS RETURNED IN UTF-8 FORMAT
516                    $delim = substr($str, 0, 1);
517                    $chrs = substr($str, 1, -1);
518                    $utf8 = '';
519                    $strlen_chrs = strlen($chrs);
520
521                    for ($c = 0; $c < $strlen_chrs; ++$c) {
522
523                        $substr_chrs_c_2 = substr($chrs, $c, 2);
524                        $ord_chrs_c = ord($chrs{$c});
525
526                        switch (true) {
527                            case $substr_chrs_c_2 == '\b':
528                                $utf8 .= chr(0x08);
529                                ++$c;
530                                break;
531                            case $substr_chrs_c_2 == '\t':
532                                $utf8 .= chr(0x09);
533                                ++$c;
534                                break;
535                            case $substr_chrs_c_2 == '\n':
536                                $utf8 .= chr(0x0A);
537                                ++$c;
538                                break;
539                            case $substr_chrs_c_2 == '\f':
540                                $utf8 .= chr(0x0C);
541                                ++$c;
542                                break;
543                            case $substr_chrs_c_2 == '\r':
544                                $utf8 .= chr(0x0D);
545                                ++$c;
546                                break;
547
548                            case $substr_chrs_c_2 == '\\"':
549                            case $substr_chrs_c_2 == '\\\'':
550                            case $substr_chrs_c_2 == '\\\\':
551                            case $substr_chrs_c_2 == '\\/':
552                                if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
553                                   ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
554                                    $utf8 .= $chrs{++$c};
555                                }
556                                break;
557
558                            case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
559                                // single, escaped unicode character
560                                $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
561                                       . chr(hexdec(substr($chrs, ($c + 4), 2)));
562                                $utf8 .= $this->utf162utf8($utf16);
563                                $c += 5;
564                                break;
565
566                            case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
567                                $utf8 .= $chrs{$c};
568                                break;
569
570                            case ($ord_chrs_c & 0xE0) == 0xC0:
571                                // characters U-00000080 - U-000007FF, mask 110XXXXX
572                                //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
573                                $utf8 .= substr($chrs, $c, 2);
574                                ++$c;
575                                break;
576
577                            case ($ord_chrs_c & 0xF0) == 0xE0:
578                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX
579                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
580                                $utf8 .= substr($chrs, $c, 3);
581                                $c += 2;
582                                break;
583
584                            case ($ord_chrs_c & 0xF8) == 0xF0:
585                                // characters U-00010000 - U-001FFFFF, mask 11110XXX
586                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
587                                $utf8 .= substr($chrs, $c, 4);
588                                $c += 3;
589                                break;
590
591                            case ($ord_chrs_c & 0xFC) == 0xF8:
592                                // characters U-00200000 - U-03FFFFFF, mask 111110XX
593                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
594                                $utf8 .= substr($chrs, $c, 5);
595                                $c += 4;
596                                break;
597
598                            case ($ord_chrs_c & 0xFE) == 0xFC:
599                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X
600                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
601                                $utf8 .= substr($chrs, $c, 6);
602                                $c += 5;
603                                break;
604
605                        }
606
607                    }
608
609                    return $utf8;
610
611                } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
612                    // array, or object notation
613
614                    if ($str{0} == '[') {
615                        $stk = array(SERVICES_JSON_IN_ARR);
616                        $arr = array();
617                    } else {
618                        if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
619                            $stk = array(SERVICES_JSON_IN_OBJ);
620                            $obj = array();
621                        } else {
622                            $stk = array(SERVICES_JSON_IN_OBJ);
623                            $obj = new stdClass();
624                        }
625                    }
626
627                    array_push($stk, array('what'  => SERVICES_JSON_SLICE,
628                                           'where' => 0,
629                                           'delim' => false));
630
631                    $chrs = substr($str, 1, -1);
632                    $chrs = $this->reduce_string($chrs);
633
634                    if ($chrs == '') {
635                        if (reset($stk) == SERVICES_JSON_IN_ARR) {
636                            return $arr;
637
638                        } else {
639                            return $obj;
640
641                        }
642                    }
643
644                    //print("\nparsing {$chrs}\n");
645
646                    $strlen_chrs = strlen($chrs);
647
648                    for ($c = 0; $c <= $strlen_chrs; ++$c) {
649
650                        $top = end($stk);
651                        $substr_chrs_c_2 = substr($chrs, $c, 2);
652
653                        if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
654                            // found a comma that is not inside a string, array, etc.,
655                            // OR we've reached the end of the character list
656                            $slice = substr($chrs, $top['where'], ($c - $top['where']));
657                            array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
658                            //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
659
660                            if (reset($stk) == SERVICES_JSON_IN_ARR) {
661                                // we are in an array, so just push an element onto the stack
662                                array_push($arr, $this->decode($slice));
663
664                            } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
665                                // we are in an object, so figure
666                                // out the property name and set an
667                                // element in an associative array,
668                                // for now
669                                $parts = array();
670                                
671                                if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
672                                    // "name":value pair
673                                    $key = $this->decode($parts[1]);
674                                    $val = $this->decode($parts[2]);
675
676                                    if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
677                                        $obj[$key] = $val;
678                                    } else {
679                                        $obj->$key = $val;
680                                    }
681                                } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
682                                    // name:value pair, where name is unquoted
683                                    $key = $parts[1];
684                                    $val = $this->decode($parts[2]);
685
686                                    if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
687                                        $obj[$key] = $val;
688                                    } else {
689                                        $obj->$key = $val;
690                                    }
691                                }
692
693                            }
694
695                        } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
696                            // found a quote, and we are not inside a string
697                            array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
698                            //print("Found start of string at {$c}\n");
699
700                        } elseif (($chrs{$c} == $top['delim']) &&
701                                 ($top['what'] == SERVICES_JSON_IN_STR) &&
702                                 ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {
703                            // found a quote, we're in a string, and it's not escaped
704                            // we know that it's not escaped becase there is _not_ an
705                            // odd number of backslashes at the end of the string so far
706                            array_pop($stk);
707                            //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
708
709                        } elseif (($chrs{$c} == '[') &&
710                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
711                            // found a left-bracket, and we are in an array, object, or slice
712                            array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
713                            //print("Found start of array at {$c}\n");
714
715                        } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
716                            // found a right-bracket, and we're in an array
717                            array_pop($stk);
718                            //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
719
720                        } elseif (($chrs{$c} == '{') &&
721                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
722                            // found a left-brace, and we are in an array, object, or slice
723                            array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
724                            //print("Found start of object at {$c}\n");
725
726                        } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
727                            // found a right-brace, and we're in an object
728                            array_pop($stk);
729                            //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
730
731                        } elseif (($substr_chrs_c_2 == '/*') &&
732                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
733                            // found a comment start, and we are in an array, object, or slice
734                            array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
735                            $c++;
736                            //print("Found start of comment at {$c}\n");
737
738                        } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
739                            // found a comment end, and we're in one now
740                            array_pop($stk);
741                            $c++;
742
743                            for ($i = $top['where']; $i <= $c; ++$i)
744                                $chrs = substr_replace($chrs, ' ', $i, 1);
745
746                            //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
747
748                        }
749
750                    }
751
752                    if (reset($stk) == SERVICES_JSON_IN_ARR) {
753                        return $arr;
754
755                    } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
756                        return $obj;
757
758                    }
759
760                }
761        }
762    }
763
764    /**
765     * @todo Ultimately, this should just call PEAR::isError()
766     */
767    function isError($data, $code = null)
768    {
769        if (class_exists('pear')) {
770            return PEAR::isError($data, $code);
771        } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
772                                 is_subclass_of($data, 'services_json_error'))) {
773            return true;
774        }
775
776        return false;
777    }
778}
779}
780if (class_exists('PEAR_Error')) {
781
782    class Services_JSON_Error extends PEAR_Error
783    {
784        function Services_JSON_Error($message = 'unknown error', $code = null,
785                                     $mode = null, $options = null, $userinfo = null)
786        {
787            parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
788        }
789    }
790
791} else {
792
793    /**
794     * @todo Ultimately, this class shall be descended from PEAR_Error
795     */
796	if (!class_exists('Services_JSON_Error')) {
797    class Services_JSON_Error
798    {
799        function Services_JSON_Error($message = 'unknown error', $code = null,
800                                     $mode = null, $options = null, $userinfo = null)
801        {
802
803        }
804    }
805	}
806
807}
808?>