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/examples/dynamictable/public/phpolait/JSON.php

http://pyjamas.googlecode.com/
PHP | 791 lines | 428 code | 112 blank | 251 comment | 97 complexity | 9125de729343e8358e1f8340253bfb57 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* @license     http://www.opensource.org/licenses/bsd-license.php
 55* @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
 56*/
 57
 58/**
 59* Marker constant for Services_JSON::decode(), used to flag stack state
 60*/
 61define('SERVICES_JSON_SLICE',   1);
 62
 63/**
 64* Marker constant for Services_JSON::decode(), used to flag stack state
 65*/
 66define('SERVICES_JSON_IN_STR',  2);
 67
 68/**
 69* Marker constant for Services_JSON::decode(), used to flag stack state
 70*/
 71define('SERVICES_JSON_IN_ARR',  3);
 72
 73/**
 74* Marker constant for Services_JSON::decode(), used to flag stack state
 75*/
 76define('SERVICES_JSON_IN_OBJ',  4);
 77
 78/**
 79* Marker constant for Services_JSON::decode(), used to flag stack state
 80*/
 81define('SERVICES_JSON_IN_CMT', 5);
 82
 83/**
 84* Behavior switch for Services_JSON::decode()
 85*/
 86define('SERVICES_JSON_LOOSE_TYPE', 16);
 87
 88/**
 89* Behavior switch for Services_JSON::decode()
 90*/
 91define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
 92
 93/**
 94* Converts to and from JSON format.
 95*
 96* Brief example of use:
 97*
 98* <code>
 99* // create a new instance of Services_JSON
100* $json = new Services_JSON();
101*
102* // convert a complexe value to JSON notation, and send it to the browser
103* $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
104* $output = $json->encode($value);
105*
106* print($output);
107* // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
108*
109* // accept incoming POST data, assumed to be in JSON notation
110* $input = file_get_contents('php://input', 1000000);
111* $value = $json->decode($input);
112* </code>
113*/
114class Services_JSON
115{
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        $bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
155
156        switch(true) {
157            case ((0x7F & $bytes) == $bytes):
158                // this case should never be reached, because we are in ASCII range
159                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
160                return chr(0x7F & $bytes);
161
162            case (0x07FF & $bytes) == $bytes:
163                // return a 2-byte UTF-8 character
164                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
165                return chr(0xC0 | (($bytes >> 6) & 0x1F))
166                     . chr(0x80 | ($bytes & 0x3F));
167
168            case (0xFFFF & $bytes) == $bytes:
169                // return a 3-byte UTF-8 character
170                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
171                return chr(0xE0 | (($bytes >> 12) & 0x0F))
172                     . chr(0x80 | (($bytes >> 6) & 0x3F))
173                     . chr(0x80 | ($bytes & 0x3F));
174        }
175
176        // ignoring UTF-32 for now, sorry
177        return '';
178    }
179
180   /**
181    * convert a string from one UTF-8 char to one UTF-16 char
182    *
183    * Normally should be handled by mb_convert_encoding, but
184    * provides a slower PHP-only method for installations
185    * that lack the multibye string extension.
186    *
187    * @param    string  $utf8   UTF-8 character
188    * @return   string  UTF-16 character
189    * @access   private
190    */
191    function utf82utf16($utf8)
192    {
193        // oh please oh please oh please oh please oh please
194        if(function_exists('mb_convert_encoding'))
195            return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
196
197        switch(strlen($utf8)) {
198            case 1:
199                // this case should never be reached, because we are in ASCII range
200                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
201                return $ut8;
202
203            case 2:
204                // return a UTF-16 character from a 2-byte UTF-8 char
205                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
206                return chr(0x07 & (ord($utf8{0}) >> 2))
207                     . chr((0xC0 & (ord($utf8{0}) << 6))
208                         | (0x3F & ord($utf8{1})));
209
210            case 3:
211                // return a UTF-16 character from a 3-byte UTF-8 char
212                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
213                return chr((0xF0 & (ord($utf8{0}) << 4))
214                         | (0x0F & (ord($utf8{1}) >> 2)))
215                     . chr((0xC0 & (ord($utf8{1}) << 6))
216                         | (0x7F & ord($utf8{2})));
217        }
218
219        // ignoring UTF-32 for now, sorry
220        return '';
221    }
222
223   /**
224    * encodes an arbitrary variable into JSON format
225    *
226    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
227    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
228    *                           if var is a strng, note that encode() always expects it
229    *                           to be in ASCII or UTF-8 format!
230    *
231    * @return   mixed   JSON string representation of input var or an error if a problem occurs
232    * @access   public
233    */
234    function encode($var)
235    {
236        switch (gettype($var)) {
237            case 'boolean':
238                return $var ? 'true' : 'false';
239
240            case 'NULL':
241                return 'null';
242
243            case 'integer':
244                return (int) $var;
245
246            case 'double':
247            case 'float':
248                return (float) $var;
249
250            case 'string':
251                // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
252                $ascii = '';
253                $strlen_var = strlen($var);
254
255               /*
256                * Iterate over every character in the string,
257                * escaping with a slash or encoding to UTF-8 where necessary
258                */
259                for ($c = 0; $c < $strlen_var; ++$c) {
260
261                    $ord_var_c = ord($var{$c});
262
263                    switch (true) {
264                        case $ord_var_c == 0x08:
265                            $ascii .= '\b';
266                            break;
267                        case $ord_var_c == 0x09:
268                            $ascii .= '\t';
269                            break;
270                        case $ord_var_c == 0x0A:
271                            $ascii .= '\n';
272                            break;
273                        case $ord_var_c == 0x0C:
274                            $ascii .= '\f';
275                            break;
276                        case $ord_var_c == 0x0D:
277                            $ascii .= '\r';
278                            break;
279
280                        case $ord_var_c == 0x22:
281                        case $ord_var_c == 0x2F:
282                        case $ord_var_c == 0x5C:
283                            // double quote, slash, slosh
284                            $ascii .= '\\'.$var{$c};
285                            break;
286
287                        case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
288                            // characters U-00000000 - U-0000007F (same as ASCII)
289                            $ascii .= $var{$c};
290                            break;
291
292                        case (($ord_var_c & 0xE0) == 0xC0):
293                            // characters U-00000080 - U-000007FF, mask 110XXXXX
294                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
295                            $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
296                            $c += 1;
297                            $utf16 = $this->utf82utf16($char);
298                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
299                            break;
300
301                        case (($ord_var_c & 0xF0) == 0xE0):
302                            // characters U-00000800 - U-0000FFFF, mask 1110XXXX
303                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
304                            $char = pack('C*', $ord_var_c,
305                                         ord($var{$c + 1}),
306                                         ord($var{$c + 2}));
307                            $c += 2;
308                            $utf16 = $this->utf82utf16($char);
309                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
310                            break;
311
312                        case (($ord_var_c & 0xF8) == 0xF0):
313                            // characters U-00010000 - U-001FFFFF, mask 11110XXX
314                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
315                            $char = pack('C*', $ord_var_c,
316                                         ord($var{$c + 1}),
317                                         ord($var{$c + 2}),
318                                         ord($var{$c + 3}));
319                            $c += 3;
320                            $utf16 = $this->utf82utf16($char);
321                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
322                            break;
323
324                        case (($ord_var_c & 0xFC) == 0xF8):
325                            // characters U-00200000 - U-03FFFFFF, mask 111110XX
326                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
327                            $char = pack('C*', $ord_var_c,
328                                         ord($var{$c + 1}),
329                                         ord($var{$c + 2}),
330                                         ord($var{$c + 3}),
331                                         ord($var{$c + 4}));
332                            $c += 4;
333                            $utf16 = $this->utf82utf16($char);
334                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
335                            break;
336
337                        case (($ord_var_c & 0xFE) == 0xFC):
338                            // characters U-04000000 - U-7FFFFFFF, mask 1111110X
339                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
340                            $char = pack('C*', $ord_var_c,
341                                         ord($var{$c + 1}),
342                                         ord($var{$c + 2}),
343                                         ord($var{$c + 3}),
344                                         ord($var{$c + 4}),
345                                         ord($var{$c + 5}));
346                            $c += 5;
347                            $utf16 = $this->utf82utf16($char);
348                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
349                            break;
350                    }
351                }
352
353                return '"'.$ascii.'"';
354
355            case 'array':
356               /*
357                * As per JSON spec if any array key is not an integer
358                * we must treat the the whole array as an object. We
359                * also try to catch a sparsely populated associative
360                * array with numeric keys here because some JS engines
361                * will create an array with empty indexes up to
362                * max_index which can cause memory issues and because
363                * the keys, which may be relevant, will be remapped
364                * otherwise.
365                *
366                * As per the ECMA and JSON specification an object may
367                * have any string as a property. Unfortunately due to
368                * a hole in the ECMA specification if the key is a
369                * ECMA reserved word or starts with a digit the
370                * parameter is only accessible using ECMAScript's
371                * bracket notation.
372                */
373
374                // treat as a JSON object
375                if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
376                    $properties = array_map(array($this, 'name_value'),
377                                            array_keys($var),
378                                            array_values($var));
379
380                    foreach($properties as $property)
381                        if(Services_JSON::isError($property))
382                            return $property;
383
384                    return '{' . join(',', $properties) . '}';
385                }
386
387                // treat it like a regular array
388                $elements = array_map(array($this, 'encode'), $var);
389
390                foreach($elements as $element)
391                    if(Services_JSON::isError($element))
392                        return $element;
393
394                return '[' . join(',', $elements) . ']';
395
396            case 'object':
397                $vars = get_object_vars($var);
398
399                $properties = array_map(array($this, 'name_value'),
400                                        array_keys($vars),
401                                        array_values($vars));
402
403                foreach($properties as $property)
404                    if(Services_JSON::isError($property))
405                        return $property;
406
407                return '{' . join(',', $properties) . '}';
408
409            default:
410                return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
411                    ? 'null'
412                    : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
413        }
414    }
415
416   /**
417    * array-walking function for use in generating JSON-formatted name-value pairs
418    *
419    * @param    string  $name   name of key to use
420    * @param    mixed   $value  reference to an array element to be encoded
421    *
422    * @return   string  JSON-formatted name-value pair, like '"name":value'
423    * @access   private
424    */
425    function name_value($name, $value)
426    {
427        $encoded_value = $this->encode($value);
428
429        if(Services_JSON::isError($encoded_value))
430            return $encoded_value;
431
432        return $this->encode(strval($name)) . ':' . $encoded_value;
433    }
434
435   /**
436    * reduce a string by removing leading and trailing comments and whitespace
437    *
438    * @param    $str    string      string value to strip of comments and whitespace
439    *
440    * @return   string  string value stripped of comments and whitespace
441    * @access   private
442    */
443    function reduce_string($str)
444    {
445        $str = preg_replace(array(
446
447                // eliminate single line comments in '// ...' form
448                '#^\s*//(.+)$#m',
449
450                // eliminate multi-line comments in '/* ... */' form, at start of string
451                '#^\s*/\*(.+)\*/#Us',
452
453                // eliminate multi-line comments in '/* ... */' form, at end of string
454                '#/\*(.+)\*/\s*$#Us'
455
456            ), '', $str);
457
458        // eliminate extraneous space
459        return trim($str);
460    }
461
462   /**
463    * decodes a JSON string into appropriate variable
464    *
465    * @param    string  $str    JSON-formatted string
466    *
467    * @return   mixed   number, boolean, string, array, or object
468    *                   corresponding to given JSON input string.
469    *                   See argument 1 to Services_JSON() above for object-output behavior.
470    *                   Note that decode() always returns strings
471    *                   in ASCII or UTF-8 format!
472    * @access   public
473    */
474    function decode($str)
475    {
476        $str = $this->reduce_string($str);
477
478        switch (strtolower($str)) {
479            case 'true':
480                return true;
481
482            case 'false':
483                return false;
484
485            case 'null':
486                return null;
487
488            default:
489                if (is_numeric($str)) {
490                    // Lookie-loo, it's a number
491
492                    // This would work on its own, but I'm trying to be
493                    // good about returning integers where appropriate:
494                    // return (float)$str;
495
496                    // Return float or int, as appropriate
497                    return ((float)$str == (integer)$str)
498                        ? (integer)$str
499                        : (float)$str;
500
501                } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
502                    // STRINGS RETURNED IN UTF-8 FORMAT
503                    $delim = substr($str, 0, 1);
504                    $chrs = substr($str, 1, -1);
505                    $utf8 = '';
506                    $strlen_chrs = strlen($chrs);
507
508                    for ($c = 0; $c < $strlen_chrs; ++$c) {
509
510                        $substr_chrs_c_2 = substr($chrs, $c, 2);
511                        $ord_chrs_c = ord($chrs{$c});
512
513                        switch (true) {
514                            case $substr_chrs_c_2 == '\b':
515                                $utf8 .= chr(0x08);
516                                ++$c;
517                                break;
518                            case $substr_chrs_c_2 == '\t':
519                                $utf8 .= chr(0x09);
520                                ++$c;
521                                break;
522                            case $substr_chrs_c_2 == '\n':
523                                $utf8 .= chr(0x0A);
524                                ++$c;
525                                break;
526                            case $substr_chrs_c_2 == '\f':
527                                $utf8 .= chr(0x0C);
528                                ++$c;
529                                break;
530                            case $substr_chrs_c_2 == '\r':
531                                $utf8 .= chr(0x0D);
532                                ++$c;
533                                break;
534
535                            case $substr_chrs_c_2 == '\\"':
536                            case $substr_chrs_c_2 == '\\\'':
537                            case $substr_chrs_c_2 == '\\\\':
538                            case $substr_chrs_c_2 == '\\/':
539                                if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
540                                   ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
541                                    $utf8 .= $chrs{++$c};
542                                }
543                                break;
544
545                            case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
546                                // single, escaped unicode character
547                                $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
548                                       . chr(hexdec(substr($chrs, ($c + 4), 2)));
549                                $utf8 .= $this->utf162utf8($utf16);
550                                $c += 5;
551                                break;
552
553                            case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
554                                $utf8 .= $chrs{$c};
555                                break;
556
557                            case ($ord_chrs_c & 0xE0) == 0xC0:
558                                // characters U-00000080 - U-000007FF, mask 110XXXXX
559                                //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
560                                $utf8 .= substr($chrs, $c, 2);
561                                ++$c;
562                                break;
563
564                            case ($ord_chrs_c & 0xF0) == 0xE0:
565                                // characters U-00000800 - U-0000FFFF, mask 1110XXXX
566                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
567                                $utf8 .= substr($chrs, $c, 3);
568                                $c += 2;
569                                break;
570
571                            case ($ord_chrs_c & 0xF8) == 0xF0:
572                                // characters U-00010000 - U-001FFFFF, mask 11110XXX
573                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
574                                $utf8 .= substr($chrs, $c, 4);
575                                $c += 3;
576                                break;
577
578                            case ($ord_chrs_c & 0xFC) == 0xF8:
579                                // characters U-00200000 - U-03FFFFFF, mask 111110XX
580                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
581                                $utf8 .= substr($chrs, $c, 5);
582                                $c += 4;
583                                break;
584
585                            case ($ord_chrs_c & 0xFE) == 0xFC:
586                                // characters U-04000000 - U-7FFFFFFF, mask 1111110X
587                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
588                                $utf8 .= substr($chrs, $c, 6);
589                                $c += 5;
590                                break;
591
592                        }
593
594                    }
595
596                    return $utf8;
597
598                } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
599                    // array, or object notation
600
601                    if ($str{0} == '[') {
602                        $stk = array(SERVICES_JSON_IN_ARR);
603                        $arr = array();
604                    } else {
605                        if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
606                            $stk = array(SERVICES_JSON_IN_OBJ);
607                            $obj = array();
608                        } else {
609                            $stk = array(SERVICES_JSON_IN_OBJ);
610                            $obj = new stdClass();
611                        }
612                    }
613
614                    array_push($stk, array('what'  => SERVICES_JSON_SLICE,
615                                           'where' => 0,
616                                           'delim' => false));
617
618                    $chrs = substr($str, 1, -1);
619                    $chrs = $this->reduce_string($chrs);
620
621                    if ($chrs == '') {
622                        if (reset($stk) == SERVICES_JSON_IN_ARR) {
623                            return $arr;
624
625                        } else {
626                            return $obj;
627
628                        }
629                    }
630
631                    //print("\nparsing {$chrs}\n");
632
633                    $strlen_chrs = strlen($chrs);
634
635                    for ($c = 0; $c <= $strlen_chrs; ++$c) {
636
637                        $top = end($stk);
638                        $substr_chrs_c_2 = substr($chrs, $c, 2);
639
640                        if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
641                            // found a comma that is not inside a string, array, etc.,
642                            // OR we've reached the end of the character list
643                            $slice = substr($chrs, $top['where'], ($c - $top['where']));
644                            array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
645                            //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
646
647                            if (reset($stk) == SERVICES_JSON_IN_ARR) {
648                                // we are in an array, so just push an element onto the stack
649                                array_push($arr, $this->decode($slice));
650
651                            } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
652                                // we are in an object, so figure
653                                // out the property name and set an
654                                // element in an associative array,
655                                // for now
656                                if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
657                                    // "name":value pair
658                                    $key = $this->decode($parts[1]);
659                                    $val = $this->decode($parts[2]);
660
661                                    if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
662                                        $obj[$key] = $val;
663                                    } else {
664                                        $obj->$key = $val;
665                                    }
666                                } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
667                                    // name:value pair, where name is unquoted
668                                    $key = $parts[1];
669                                    $val = $this->decode($parts[2]);
670
671                                    if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
672                                        $obj[$key] = $val;
673                                    } else {
674                                        $obj->$key = $val;
675                                    }
676                                }
677
678                            }
679
680                        } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
681                            // found a quote, and we are not inside a string
682                            array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
683                            //print("Found start of string at {$c}\n");
684
685                        } elseif (($chrs{$c} == $top['delim']) &&
686                                 ($top['what'] == SERVICES_JSON_IN_STR) &&
687                                 (($chrs{$c - 1} != '\\') ||
688                                 ($chrs{$c - 1} == '\\' && $chrs{$c - 2} == '\\'))) {
689                            // found a quote, we're in a string, and it's not escaped
690                            array_pop($stk);
691                            //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
692
693                        } elseif (($chrs{$c} == '[') &&
694                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
695                            // found a left-bracket, and we are in an array, object, or slice
696                            array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
697                            //print("Found start of array at {$c}\n");
698
699                        } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
700                            // found a right-bracket, and we're in an array
701                            array_pop($stk);
702                            //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
703
704                        } elseif (($chrs{$c} == '{') &&
705                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
706                            // found a left-brace, and we are in an array, object, or slice
707                            array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
708                            //print("Found start of object at {$c}\n");
709
710                        } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
711                            // found a right-brace, and we're in an object
712                            array_pop($stk);
713                            //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
714
715                        } elseif (($substr_chrs_c_2 == '/*') &&
716                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
717                            // found a comment start, and we are in an array, object, or slice
718                            array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
719                            $c++;
720                            //print("Found start of comment at {$c}\n");
721
722                        } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
723                            // found a comment end, and we're in one now
724                            array_pop($stk);
725                            $c++;
726
727                            for ($i = $top['where']; $i <= $c; ++$i)
728                                $chrs = substr_replace($chrs, ' ', $i, 1);
729
730                            //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
731
732                        }
733
734                    }
735
736                    if (reset($stk) == SERVICES_JSON_IN_ARR) {
737                        return $arr;
738
739                    } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
740                        return $obj;
741
742                    }
743
744                }
745        }
746    }
747
748    /**
749     * @todo Ultimately, this should just call PEAR::isError()
750     */
751    function isError($data, $code = null)
752    {
753        if (class_exists('pear')) {
754            return PEAR::isError($data, $code);
755        } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
756                                 is_subclass_of($data, 'services_json_error'))) {
757            return true;
758        }
759
760        return false;
761    }
762}
763
764if (class_exists('pear_error')) {
765
766    class Services_JSON_Error extends PEAR_Error
767    {
768        function Services_JSON_Error($message = 'unknown error', $code = null,
769                                     $mode = null, $options = null, $userinfo = null)
770        {
771            parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
772        }
773    }
774
775} else {
776
777    /**
778     * @todo Ultimately, this class shall be descended from PEAR_Error
779     */
780    class Services_JSON_Error
781    {
782        function Services_JSON_Error($message = 'unknown error', $code = null,
783                                     $mode = null, $options = null, $userinfo = null)
784        {
785
786        }
787    }
788
789}
790
791?>