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/shopgate/vendors/shopgate_library/vendors/JSON.php

https://github.com/DaveBenNoah/PrestaShop-modules
PHP | 807 lines | 425 code | 114 blank | 268 comment | 96 complexity | c8398aeb5c3c71aeb1813389d9a030af 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     sgServicesJSON
 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,v 1.31 2006/06/28 05:54:17 migurski Exp $
 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 sgServicesJSON::decode(), used to flag stack state
 61 */
 62define('sgServicesJSON_SLICE',   1);
 63
 64/**
 65 * Marker constant for sgServicesJSON::decode(), used to flag stack state
 66 */
 67define('sgServicesJSON_IN_STR',  2);
 68
 69/**
 70 * Marker constant for sgServicesJSON::decode(), used to flag stack state
 71 */
 72define('sgServicesJSON_IN_ARR',  3);
 73
 74/**
 75 * Marker constant for sgServicesJSON::decode(), used to flag stack state
 76 */
 77define('sgServicesJSON_IN_OBJ',  4);
 78
 79/**
 80 * Marker constant for sgServicesJSON::decode(), used to flag stack state
 81 */
 82define('sgServicesJSON_IN_CMT', 5);
 83
 84/**
 85 * Behavior switch for sgServicesJSON::decode()
 86 */
 87define('sgServicesJSON_LOOSE_TYPE', 16);
 88
 89/**
 90 * Behavior switch for sgServicesJSON::decode()
 91 */
 92define('sgServicesJSON_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 sgServicesJSON
101 * $json = new sgServicesJSON();
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 */
115class sgServicesJSON
116{
117   /**
118    * constructs a new JSON instance
119    *
120    * @param    int     $use    object behavior flags; combine with boolean-OR
121    *
122    *                           possible values:
123    *                           - sgServicesJSON_LOOSE_TYPE:  loose typing.
124    *                                   "{...}" syntax creates associative arrays
125    *                                   instead of objects in decode().
126    *                           - sgServicesJSON_SUPPRESS_ERRORS:  error suppression.
127    *                                   Values which can't be encoded (e.g. resources)
128    *                                   appear as NULL instead of throwing errors.
129    *                                   By default, a deeply-nested resource will
130    *                                   bubble up with an error, so all return values
131    *                                   from encode() should be checked with isError()
132    */
133    function sgServicesJSON($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
228    *
229    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
230    *                           see argument 1 to sgServicesJSON() above for array-parsing behavior.
231    *                           if var is a strng, note that encode() always expects it
232    *                           to be in ASCII or UTF-8 format!
233    *
234    * @return   mixed   JSON string representation of input var or an error if a problem occurs
235    * @access   public
236    */
237    function encode($var)
238    {
239        switch (gettype($var)) {
240            case 'boolean':
241                return $var ? 'true' : 'false';
242
243            case 'NULL':
244                return 'null';
245
246            case 'integer':
247                return (int) $var;
248
249            case 'double':
250            case 'float':
251                return (float) $var;
252
253            case 'string':
254                // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
255                $ascii = '';
256                $strlen_var = strlen($var);
257
258               /*
259                * Iterate over every character in the string,
260                * escaping with a slash or encoding to UTF-8 where necessary
261                */
262                for ($c = 0; $c < $strlen_var; ++$c) {
263
264                    $ord_var_c = ord($var{$c});
265
266                    switch (true) {
267                        case $ord_var_c == 0x08:
268                            $ascii .= '\b';
269                            break;
270                        case $ord_var_c == 0x09:
271                            $ascii .= '\t';
272                            break;
273                        case $ord_var_c == 0x0A:
274                            $ascii .= '\n';
275                            break;
276                        case $ord_var_c == 0x0C:
277                            $ascii .= '\f';
278                            break;
279                        case $ord_var_c == 0x0D:
280                            $ascii .= '\r';
281                            break;
282
283                        case $ord_var_c == 0x22:
284                        case $ord_var_c == 0x2F:
285                        case $ord_var_c == 0x5C:
286                            // double quote, slash, slosh
287                            $ascii .= '\\'.$var{$c};
288                            break;
289
290                        case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
291                            // characters U-00000000 - U-0000007F (same as ASCII)
292                            $ascii .= $var{$c};
293                            break;
294
295                        case (($ord_var_c & 0xE0) == 0xC0):
296                            // characters U-00000080 - U-000007FF, mask 110XXXXX
297                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
298                            $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
299                            $c += 1;
300                            $utf16 = $this->utf82utf16($char);
301                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
302                            break;
303
304                        case (($ord_var_c & 0xF0) == 0xE0):
305                            // characters U-00000800 - U-0000FFFF, mask 1110XXXX
306                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
307                            $char = pack('C*', $ord_var_c,
308                                         ord($var{$c + 1}),
309                                         ord($var{$c + 2}));
310                            $c += 2;
311                            $utf16 = $this->utf82utf16($char);
312                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
313                            break;
314
315                        case (($ord_var_c & 0xF8) == 0xF0):
316                            // characters U-00010000 - U-001FFFFF, mask 11110XXX
317                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
318                            $char = pack('C*', $ord_var_c,
319                                         ord($var{$c + 1}),
320                                         ord($var{$c + 2}),
321                                         ord($var{$c + 3}));
322                            $c += 3;
323                            $utf16 = $this->utf82utf16($char);
324                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
325                            break;
326
327                        case (($ord_var_c & 0xFC) == 0xF8):
328                            // characters U-00200000 - U-03FFFFFF, mask 111110XX
329                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
330                            $char = pack('C*', $ord_var_c,
331                                         ord($var{$c + 1}),
332                                         ord($var{$c + 2}),
333                                         ord($var{$c + 3}),
334                                         ord($var{$c + 4}));
335                            $c += 4;
336                            $utf16 = $this->utf82utf16($char);
337                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
338                            break;
339
340                        case (($ord_var_c & 0xFE) == 0xFC):
341                            // characters U-04000000 - U-7FFFFFFF, mask 1111110X
342                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
343                            $char = pack('C*', $ord_var_c,
344                                         ord($var{$c + 1}),
345                                         ord($var{$c + 2}),
346                                         ord($var{$c + 3}),
347                                         ord($var{$c + 4}),
348                                         ord($var{$c + 5}));
349                            $c += 5;
350                            $utf16 = $this->utf82utf16($char);
351                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
352                            break;
353                    }
354                }
355
356                return '"'.$ascii.'"';
357
358            case 'array':
359               /*
360                * As per JSON spec if any array key is not an integer
361                * we must treat the the whole array as an object. We
362                * also try to catch a sparsely populated associative
363                * array with numeric keys here because some JS engines
364                * will create an array with empty indexes up to
365                * max_index which can cause memory issues and because
366                * the keys, which may be relevant, will be remapped
367                * otherwise.
368                *
369                * As per the ECMA and JSON specification an object may
370                * have any string as a property. Unfortunately due to
371                * a hole in the ECMA specification if the key is a
372                * ECMA reserved word or starts with a digit the
373                * parameter is only accessible using ECMAScript's
374                * bracket notation.
375                */
376
377                // treat as a JSON object
378                if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
379                    $properties = array_map(array($this, 'name_value'),
380                                            array_keys($var),
381                                            array_values($var));
382
383                    foreach($properties as $property) {
384                        if(sgServicesJSON::isError($property)) {
385                            return $property;
386                        }
387                    }
388
389                    return '{' . join(',', $properties) . '}';
390                }
391
392                // treat it like a regular array
393                $elements = array_map(array($this, 'encode'), $var);
394
395                foreach($elements as $element) {
396                    if(sgServicesJSON::isError($element)) {
397                        return $element;
398                    }
399                }
400
401                return '[' . join(',', $elements) . ']';
402
403            case 'object':
404                $vars = get_object_vars($var);
405
406                $properties = array_map(array($this, 'name_value'),
407                                        array_keys($vars),
408                                        array_values($vars));
409
410                foreach($properties as $property) {
411                    if(sgServicesJSON::isError($property)) {
412                        return $property;
413                    }
414                }
415
416                return '{' . join(',', $properties) . '}';
417
418            default:
419                return ($this->use & sgServicesJSON_SUPPRESS_ERRORS)
420                    ? 'null'
421                    : new sgServicesJSON_Error(gettype($var)." can not be encoded as JSON string");
422        }
423    }
424
425   /**
426    * array-walking function for use in generating JSON-formatted name-value pairs
427    *
428    * @param    string  $name   name of key to use
429    * @param    mixed   $value  reference to an array element to be encoded
430    *
431    * @return   string  JSON-formatted name-value pair, like '"name":value'
432    * @access   private
433    */
434    function name_value($name, $value)
435    {
436        $encoded_value = $this->encode($value);
437
438        if(sgServicesJSON::isError($encoded_value)) {
439            return $encoded_value;
440        }
441
442        return $this->encode(strval($name)) . ':' . $encoded_value;
443    }
444
445   /**
446    * reduce a string by removing leading and trailing comments and whitespace
447    *
448    * @param    $str    string      string value to strip of comments and whitespace
449    *
450    * @return   string  string value stripped of comments and whitespace
451    * @access   private
452    */
453    function reduce_string($str)
454    {
455        $str = preg_replace(array(
456
457                // eliminate single line comments in '// ...' form
458                '#^\s*//(.+)$#m',
459
460                // eliminate multi-line comments in '/* ... */' form, at start of string
461                '#^\s*/\*(.+)\*/#Us',
462
463                // eliminate multi-line comments in '/* ... */' form, at end of string
464                '#/\*(.+)\*/\s*$#Us'
465
466            ), '', $str);
467
468        // eliminate extraneous space
469        return trim($str);
470    }
471
472   /**
473    * decodes a JSON string into appropriate variable
474    *
475    * @param    string  $str    JSON-formatted string
476    *
477    * @return   mixed   number, boolean, string, array, or object
478    *                   corresponding to given JSON input string.
479    *                   See argument 1 to sgServicesJSON() above for object-output behavior.
480    *                   Note that decode() always returns strings
481    *                   in ASCII or UTF-8 format!
482    * @access   public
483    */
484    function decode($str)
485    {
486        $str = $this->reduce_string($str);
487
488        switch (strtolower($str)) {
489            case 'true':
490                return true;
491
492            case 'false':
493                return false;
494
495            case 'null':
496                return null;
497
498            default:
499                $m = array();
500
501                if (is_numeric($str)) {
502                    // Lookie-loo, it's a number
503
504                    // This would work on its own, but I'm trying to be
505                    // good about returning integers where appropriate:
506                    // return (float)$str;
507
508                    // Return float or int, as appropriate
509                    return ((float)$str == (integer)$str)
510                        ? (integer)$str
511                        : (float)$str;
512
513                } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
514                    // STRINGS RETURNED IN UTF-8 FORMAT
515                    $delim = substr($str, 0, 1);
516                    $chrs = substr($str, 1, -1);
517                    $utf8 = '';
518                    $strlen_chrs = strlen($chrs);
519
520                    for ($c = 0; $c < $strlen_chrs; ++$c) {
521
522                        $substr_chrs_c_2 = substr($chrs, $c, 2);
523                        $ord_chrs_c = ord($chrs{$c});
524
525                        switch (true) {
526                            case $substr_chrs_c_2 == '\b':
527                                $utf8 .= chr(0x08);
528                                ++$c;
529                                break;
530                            case $substr_chrs_c_2 == '\t':
531                                $utf8 .= chr(0x09);
532                                ++$c;
533                                break;
534                            case $substr_chrs_c_2 == '\n':
535                                $utf8 .= chr(0x0A);
536                                ++$c;
537                                break;
538                            case $substr_chrs_c_2 == '\f':
539                                $utf8 .= chr(0x0C);
540                                ++$c;
541                                break;
542                            case $substr_chrs_c_2 == '\r':
543                                $utf8 .= chr(0x0D);
544                                ++$c;
545                                break;
546
547                            case $substr_chrs_c_2 == '\\"':
548                            case $substr_chrs_c_2 == '\\\'':
549                            case $substr_chrs_c_2 == '\\\\':
550                            case $substr_chrs_c_2 == '\\/':
551                                if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
552                                   ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
553                                    $utf8 .= $chrs{++$c};
554                                }
555                                break;
556
557                            case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
558                                // single, escaped unicode character
559                                $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
560                                       . chr(hexdec(substr($chrs, ($c + 4), 2)));
561                                $utf8 .= $this->utf162utf8($utf16);
562                                $c += 5;
563                                break;
564
565                            case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
566                                $utf8 .= $chrs{$c};
567                                break;
568
569                            case ($ord_chrs_c & 0xE0) == 0xC0:
570                                // characters U-00000080 - U-000007FF, mask 110XXXXX
571                                //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
572                                $utf8 .= substr($chrs, $c, 2);
573                                ++$c;
574                                break;
575
576                            case ($ord_chrs_c & 0xF0) == 0xE0:
577                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX
578                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
579                                $utf8 .= substr($chrs, $c, 3);
580                                $c += 2;
581                                break;
582
583                            case ($ord_chrs_c & 0xF8) == 0xF0:
584                                // characters U-00010000 - U-001FFFFF, mask 11110XXX
585                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
586                                $utf8 .= substr($chrs, $c, 4);
587                                $c += 3;
588                                break;
589
590                            case ($ord_chrs_c & 0xFC) == 0xF8:
591                                // characters U-00200000 - U-03FFFFFF, mask 111110XX
592                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
593                                $utf8 .= substr($chrs, $c, 5);
594                                $c += 4;
595                                break;
596
597                            case ($ord_chrs_c & 0xFE) == 0xFC:
598                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X
599                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
600                                $utf8 .= substr($chrs, $c, 6);
601                                $c += 5;
602                                break;
603
604                        }
605
606                    }
607
608                    return $utf8;
609
610                } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
611                    // array, or object notation
612
613                    if ($str{0} == '[') {
614                        $stk = array(sgServicesJSON_IN_ARR);
615                        $arr = array();
616                    } else {
617                        if ($this->use & sgServicesJSON_LOOSE_TYPE) {
618                            $stk = array(sgServicesJSON_IN_OBJ);
619                            $obj = array();
620                        } else {
621                            $stk = array(sgServicesJSON_IN_OBJ);
622                            $obj = new stdClass();
623                        }
624                    }
625
626                    array_push($stk, array('what'  => sgServicesJSON_SLICE,
627                                           'where' => 0,
628                                           'delim' => false));
629
630                    $chrs = substr($str, 1, -1);
631                    $chrs = $this->reduce_string($chrs);
632
633                    if ($chrs == '') {
634                        if (reset($stk) == sgServicesJSON_IN_ARR) {
635                            return $arr;
636
637                        } else {
638                            return $obj;
639
640                        }
641                    }
642
643                    //print("\nparsing {$chrs}\n");
644
645                    $strlen_chrs = strlen($chrs);
646
647                    for ($c = 0; $c <= $strlen_chrs; ++$c) {
648
649                        $top = end($stk);
650                        $substr_chrs_c_2 = substr($chrs, $c, 2);
651
652                        if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == sgServicesJSON_SLICE))) {
653                            // found a comma that is not inside a string, array, etc.,
654                            // OR we've reached the end of the character list
655                            $slice = substr($chrs, $top['where'], ($c - $top['where']));
656                            array_push($stk, array('what' => sgServicesJSON_SLICE, 'where' => ($c + 1), 'delim' => false));
657                            //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
658
659                            if (reset($stk) == sgServicesJSON_IN_ARR) {
660                                // we are in an array, so just push an element onto the stack
661                                array_push($arr, $this->decode($slice));
662
663                            } elseif (reset($stk) == sgServicesJSON_IN_OBJ) {
664                                // we are in an object, so figure
665                                // out the property name and set an
666                                // element in an associative array,
667                                // for now
668                                $parts = array();
669
670                                if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
671                                    // "name":value pair
672                                    $key = $this->decode($parts[1]);
673                                    $val = $this->decode($parts[2]);
674
675                                    if ($this->use & sgServicesJSON_LOOSE_TYPE) {
676                                        $obj[$key] = $val;
677                                    } else {
678                                        $obj->$key = $val;
679                                    }
680                                } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
681                                    // name:value pair, where name is unquoted
682                                    $key = $parts[1];
683                                    $val = $this->decode($parts[2]);
684
685                                    if ($this->use & sgServicesJSON_LOOSE_TYPE) {
686                                        $obj[$key] = $val;
687                                    } else {
688                                        $obj->$key = $val;
689                                    }
690                                }
691
692                            }
693
694                        } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != sgServicesJSON_IN_STR)) {
695                            // found a quote, and we are not inside a string
696                            array_push($stk, array('what' => sgServicesJSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
697                            //print("Found start of string at {$c}\n");
698
699                        } elseif (($chrs{$c} == $top['delim']) &&
700                                 ($top['what'] == sgServicesJSON_IN_STR) &&
701                                 ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {
702                            // found a quote, we're in a string, and it's not escaped
703                            // we know that it's not escaped becase there is _not_ an
704                            // odd number of backslashes at the end of the string so far
705                            array_pop($stk);
706                            //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
707
708                        } elseif (($chrs{$c} == '[') &&
709                                 in_array($top['what'], array(sgServicesJSON_SLICE, sgServicesJSON_IN_ARR, sgServicesJSON_IN_OBJ))) {
710                            // found a left-bracket, and we are in an array, object, or slice
711                            array_push($stk, array('what' => sgServicesJSON_IN_ARR, 'where' => $c, 'delim' => false));
712                            //print("Found start of array at {$c}\n");
713
714                        } elseif (($chrs{$c} == ']') && ($top['what'] == sgServicesJSON_IN_ARR)) {
715                            // found a right-bracket, and we're in an array
716                            array_pop($stk);
717                            //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
718
719                        } elseif (($chrs{$c} == '{') &&
720                                 in_array($top['what'], array(sgServicesJSON_SLICE, sgServicesJSON_IN_ARR, sgServicesJSON_IN_OBJ))) {
721                            // found a left-brace, and we are in an array, object, or slice
722                            array_push($stk, array('what' => sgServicesJSON_IN_OBJ, 'where' => $c, 'delim' => false));
723                            //print("Found start of object at {$c}\n");
724
725                        } elseif (($chrs{$c} == '}') && ($top['what'] == sgServicesJSON_IN_OBJ)) {
726                            // found a right-brace, and we're in an object
727                            array_pop($stk);
728                            //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
729
730                        } elseif (($substr_chrs_c_2 == '/*') &&
731                                 in_array($top['what'], array(sgServicesJSON_SLICE, sgServicesJSON_IN_ARR, sgServicesJSON_IN_OBJ))) {
732                            // found a comment start, and we are in an array, object, or slice
733                            array_push($stk, array('what' => sgServicesJSON_IN_CMT, 'where' => $c, 'delim' => false));
734                            $c++;
735                            //print("Found start of comment at {$c}\n");
736
737                        } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == sgServicesJSON_IN_CMT)) {
738                            // found a comment end, and we're in one now
739                            array_pop($stk);
740                            $c++;
741
742                            for ($i = $top['where']; $i <= $c; ++$i)
743                                $chrs = substr_replace($chrs, ' ', $i, 1);
744
745                            //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
746
747                        }
748
749                    }
750
751                    if (reset($stk) == sgServicesJSON_IN_ARR) {
752                        return $arr;
753
754                    } elseif (reset($stk) == sgServicesJSON_IN_OBJ) {
755                        return $obj;
756
757                    }
758
759                }
760        }
761    }
762
763    /**
764     * @todo Ultimately, this should just call PEAR::isError()
765     */
766    function isError($data, $code = null)
767    {
768//         if (class_exists('pear')) {
769//             return PEAR::isError($data, $code);
770//         } else
771        if (is_object($data) && (get_class($data) == 'sgServicesJSON_error'
772        || is_subclass_of($data, 'sgServicesJSON_error'))) {
773            return true;
774        }
775
776        return false;
777    }
778}
779
780// if (class_exists('PEAR_Error')) {
781
782//     class sgServicesJSON_Error extends PEAR_Error
783//     {
784//         function sgServicesJSON_Error($message = 'unknown error', $code = null,
785//                                      $mode = null, $options = null, $userinfo = null)
786//         {
787//             parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
788//         }
789//     }
790
791// } else {
792
793    /**
794     * @todo Ultimately, this class shall be descended from PEAR_Error
795     */
796    class sgServicesJSON_Error
797    {
798        function sgServicesJSON_Error($message = 'unknown error', $code = null,
799                                     $mode = null, $options = null, $userinfo = null)
800        {
801
802        }
803    }
804
805// }
806
807?>