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<?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: $Id$
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
 */
62
define('SERVICES_JSON_SLICE',   1);
63
 
64
/**
65
 * Marker constant for Services_JSON::decode(), used to flag stack state
66
 */
67
define('SERVICES_JSON_IN_STR',  2);
68
 
69
/**
70
 * Marker constant for Services_JSON::decode(), used to flag stack state
71
 */
72
define('SERVICES_JSON_IN_ARR',  3);
73
 
74
/**
75
 * Marker constant for Services_JSON::decode(), used to flag stack state
76
 */
77
define('SERVICES_JSON_IN_OBJ',  4);
78
 
79
/**
80
 * Marker constant for Services_JSON::decode(), used to flag stack state
81
 */
82
define('SERVICES_JSON_IN_CMT', 5);
83
 
84
/**
85
 * Behavior switch for Services_JSON::decode()
86
 */
87
define('SERVICES_JSON_LOOSE_TYPE', 16);
88
 
89
/**
90
 * Behavior switch for Services_JSON::decode()
91
 */
92
define('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
 */
115
class Services_JSON
116
{
117
   /**
118
    * constructs a new JSON instance
119
    *
120
    * @param    int     $use    object behavior flags; combine with boolean-OR
121
    *
122
    *                           possible values:
123
    *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
124
    *                                   "{...}" syntax creates associative arrays
125
    *                                   instead of objects in decode().
126
    *                           - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
127
    *                                   Values which can't be encoded (e.g. resources)
128
    *                                   appear as NULL instead of throwing errors.
129
    *                                   By default, a deeply-nested resource will
130
    *                                   bubble up with an error, so all return values
131
    *                                   from encode() should be checked with isError()
132
    */
133
    function Services_JSON($use = 0)
134
    {
135
        $this->use = $use;
136
    }
137
 
138
   /**
139
    * convert a string from one UTF-16 char to one UTF-8 char
140
    *
141
    * Normally should be handled by mb_convert_encoding, but
142
    * provides a slower PHP-only method for installations
143
    * that lack the multibye string extension.
144
    *
145
    * @param    string  $utf16  UTF-16 character
146
    * @return   string  UTF-8 character
147
    * @access   private
148
    */
149
    function utf162utf8($utf16)
150
    {
151
        // oh please oh please oh please oh please oh please
152
        if(function_exists('mb_convert_encoding')) {
153
            return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
154
        }
155
 
156
        $bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
157
 
158
        switch(true) {
159
            case ((0x7F & $bytes) == $bytes):
160
                // this case should never be reached, because we are in ASCII range
161
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
162
                return chr(0x7F & $bytes);
163
 
164
            case (0x07FF & $bytes) == $bytes:
165
                // return a 2-byte UTF-8 character
166
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
167
                return chr(0xC0 | (($bytes >> 6) & 0x1F))
168
                     . chr(0x80 | ($bytes & 0x3F));
169
 
170
            case (0xFFFF & $bytes) == $bytes:
171
                // return a 3-byte UTF-8 character
172
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
173
                return chr(0xE0 | (($bytes >> 12) & 0x0F))
174
                     . chr(0x80 | (($bytes >> 6) & 0x3F))
175
                     . chr(0x80 | ($bytes & 0x3F));
176
        }
177
 
178
        // ignoring UTF-32 for now, sorry
179
        return '';
180
    }
181
 
182
   /**
183
    * convert a string from one UTF-8 char to one UTF-16 char
184
    *
185
    * Normally should be handled by mb_convert_encoding, but
186
    * provides a slower PHP-only method for installations
187
    * that lack the multibye string extension.
188
    *
189
    * @param    string  $utf8   UTF-8 character
190
    * @return   string  UTF-16 character
191
    * @access   private
192
    */
193
    function utf82utf16($utf8)
194
    {
195
        // oh please oh please oh please oh please oh please
196
        if(function_exists('mb_convert_encoding')) {
197
            return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
198
        }
199
 
200
        switch(strlen($utf8)) {
201
            case 1:
202
                // this case should never be reached, because we are in ASCII range
203
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
204
                return $utf8;
205
 
206
            case 2:
207
                // return a UTF-16 character from a 2-byte UTF-8 char
208
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
209
                return chr(0x07 & (ord($utf8{0}) >> 2))
210
                     . chr((0xC0 & (ord($utf8{0}) << 6))
211
                         | (0x3F & ord($utf8{1})));
212
 
213
            case 3:
214
                // return a UTF-16 character from a 3-byte UTF-8 char
215
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
216
                return chr((0xF0 & (ord($utf8{0}) << 4))
217
                         | (0x0F & (ord($utf8{1}) >> 2)))
218
                     . chr((0xC0 & (ord($utf8{1}) << 6))
219
                         | (0x7F & ord($utf8{2})));
220
        }
221
 
222
        // ignoring UTF-32 for now, sorry
223
        return '';
224
    }
225
 
226
   /**
227
    * encodes an arbitrary variable into JSON format
228
    *
229
    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
230
    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
231
    *                           if var is a strng, note that encode() always expects it
232
    *                           to be in ASCII or UTF-8 format!
233
    *
234
    * @return   mixed   JSON string representation of input var or an error if a problem occurs
235
    * @access   public
236
    */
237
    function encode($var)
238
    {
239
        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 $property) {
384
                        if(Services_JSON::isError($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 $element) {
396
                    if(Services_JSON::isError($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 $property) {
411
                    if(Services_JSON::isError($property)) {
412
                        return $property;
413
                    }
414
                }
415
 
416
                return '{' . join(',', $properties) . '}';
417
 
418
            default:
419
                return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
420
                    ? 'null'
421
                    : new Services_JSON_Error(gettype($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(Services_JSON::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  $str    JSON-formatted string
476
    *
477
    * @return   mixed   number, boolean, string, array, or object
478
    *                   corresponding to given JSON input string.
479
    *                   See argument 1 to Services_JSON() above for object-output behavior.
480
    *                   Note that decode() always returns strings
481
    *                   in ASCII or UTF-8 format!
482
    * @access   public
483
    */
484
    function decode($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(SERVICES_JSON_IN_ARR);
615
                        $arr = array();
616
                    } else {
617
                        if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
618
                            $stk = array(SERVICES_JSON_IN_OBJ);
619
                            $obj = array();
620
                        } else {
621
                            $stk = array(SERVICES_JSON_IN_OBJ);
622
                            $obj = new stdClass();
623
                        }
624
                    }
625
 
626
                    array_push($stk, array('what'  => SERVICES_JSON_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) == SERVICES_JSON_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'] == SERVICES_JSON_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' => SERVICES_JSON_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($stk) == SERVICES_JSON_IN_ARR) {
660
                                // we are in an array, so just push an element onto the stack
661
                                array_push($arr, $this->decode($slice));
662
 
663
                            } elseif (reset($stk) == SERVICES_JSON_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 & SERVICES_JSON_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 & SERVICES_JSON_LOOSE_TYPE) {
686
                                        $obj[$key] = $val;
687
                                    } else {
688
                                        $obj->$key = $val;
689
                                    }
690
                                }
691
 
692
                            }
693
 
694
                        } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
695
                            // found a quote, and we are not inside a string
696
                            array_push($stk, array('what' => SERVICES_JSON_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'] == SERVICES_JSON_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($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
710
                            // found a left-bracket, and we are in an array, object, or slice
711
                            array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
712
                            //print("Found start of array at {$c}\n");
713
 
714
                        } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
715
                            // found a right-bracket, and we're in an array
716
                            array_pop($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($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
721
                            // found a left-brace, and we are in an array, object, or slice
722
                            array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
723
                            //print("Found start of object at {$c}\n");
724
 
725
                        } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
726
                            // found a right-brace, and we're in an object
727
                            array_pop($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(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
732
                            // found a comment start, and we are in an array, object, or slice
733
                            array_push($stk, array('what' => SERVICES_JSON_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'] == SERVICES_JSON_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) == SERVICES_JSON_IN_ARR) {
752
                        return $arr;
753
 
754
                    } elseif (reset($stk) == SERVICES_JSON_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, $code);
770
        } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
771
                                 is_subclass_of($data, 'services_json_error'))) {
772
            return true;
773
        }
774
 
775
        return false;
776
    }
777
}
778
 
779
if (class_exists('PEAR_Error')) {
780
 
781
    class Services_JSON_Error extends PEAR_Error
782
    {
783
        function Services_JSON_Error($message = 'unknown error', $code = null,
784
                                     $mode = null, $options = null, $userinfo = null)
785
        {
786
            parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
787
        }
788
    }
789
 
790
} else {
791
 
792
    /**
793
     * @todo Ultimately, this class shall be descended from PEAR_Error
794
     */
795
    class Services_JSON_Error
796
    {
797
        function Services_JSON_Error($message = 'unknown error', $code = null,
798
                                     $mode = null, $options = null, $userinfo = null)
799
        {
800
 
801
        }
802
    }
803
 
804
}
805
 
806
?>