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<?php
/**
* @category phool
* @package phool
*/
//============================================================================
/**
* This file is adapted from the PEAR Services_JSON package version 1.0.3,
* available at http://pear.php.net/package/Services_JSON.
*
* Changes from PEAR version:
*        - switch to PHP 5 object syntax
*        - make independant from PEAR error handling using exceptions . Also
*          remove SERVICES_JSON_SUPPRESS_ERRORS flag (replace with a try/catch
*          construct)
*/

namespace Phool\Web;

/**
 * Converts to and from JSON format.
 *
 * JSON (JavaScript Object Notation) is a lightweight data-interchange
 * format. It is easy for humans to read and write. It is easy for machines
 * to parse and generate. It is based on a subset of the JavaScript
 * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
 * This feature can also be found in  Python. JSON is a text format that is
 * completely language independent but uses conventions that are familiar
 * to programmers of the C-family of languages, including C, C++, C#, Java,
 * JavaScript, Perl, TCL, and many others. These properties make JSON an
 * ideal data-interchange language.
 *
 * This package provides a simple encoder and decoder for JSON notation. It
 * is intended for use with client-side Javascript applications that make
 * use of HTTPRequest to perform server communication functions - data can
 * be encoded into JSON notation for use in a client-side javascript, or
 * decoded from incoming Javascript requests. JSON format is native to
 * Javascript, and can be directly eval()'ed with no further parsing
 * overhead
 *
 * All strings should be in ASCII or UTF-8 format!
 *
 * LICENSE: Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met: Redistributions of source code must retain the
 * above copyright notice, this list of conditions and the following
 * disclaimer. Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * @category
 * @package     Services_JSON
 * @author      Michal Migurski <mike-json@teczno.com>
 * @author      Matt Knapp <mdknapp[at]gmail[dot]com>
 * @author      Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
 * @author      Francois Laupretre <francois@tekwire.net>
 * @copyright   2005 Michal Migurski
 * @version     CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $
 * @license     http://www.opensource.org/licenses/bsd-license.php
 * @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
 */

/**
 * Marker constant for Services_JSON::decode(), used to flag stack state
 */
const SERVICES_JSON_SLICE=1;

/**
 * Marker constant for Services_JSON::decode(), used to flag stack state
 */
const SERVICES_JSON_IN_STR=2;

/**
 * Marker constant for Services_JSON::decode(), used to flag stack state
 */
const SERVICES_JSON_IN_ARR=3;

/**
 * Marker constant for Services_JSON::decode(), used to flag stack state
 */
const SERVICES_JSON_IN_OBJ=4;

/**
 * Marker constant for Services_JSON::decode(), used to flag stack state
 */
const SERVICES_JSON_IN_CMT=5;

/**
 * Behavior switch for Services_JSON::decode()
 */
const SERVICES_JSON_LOOSE_TYPE=16;

/**
 * Converts to and from JSON format.
 *
 * Brief example of use:
 *
 * <code>
 * // create a new instance of Services_JSON
 * $json = new \Phool\Web\Services_JSON();
 *
 * // convert a complexe value to JSON notation, and send it to the browser
 * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
 * $output = $json->encode($value);
 *
 * print($output);
 * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
 *
 * // accept incoming POST data, assumed to be in JSON notation
 * $input = file_get_contents('php://input', 1000000);
 * $value = $json->decode($input);
 * </code>
 */
class Services_JSON
{
   
/**
    * constructs a new JSON instance
    */

    /** @var int object behavior flags; combine with boolean-OR */

    
private $use;

    
/**
    * @param    int     $use    object behavior flags; combine with boolean-OR
    *
    *                           possible values:
    *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
    *                                   "{...}" syntax creates associative arrays
    *                                   instead of objects in decode().
    */
    
public function __construct($use 0)
    {
        
$this->use $use;
    }

   
/**
    * convert a string from one UTF-16 char to one UTF-8 char
    *
    * Normally should be handled by mb_convert_encoding, but
    * provides a slower PHP-only method for installations
    * that lack the multibye string extension.
    *
    * @param    string  $utf16  UTF-16 character
    * @return   string  UTF-8 character
    */
    
private function utf162utf8($utf16)
    {
        
// oh please oh please oh please oh please oh please
        
if(function_exists('mb_convert_encoding')) {
            return 
mb_convert_encoding($utf16'UTF-8''UTF-16');
        }

        
$bytes = (ord($utf16{0}) << 8) | ord($utf16{1});

        switch(
true) {
            case ((
0x7F $bytes) == $bytes):
                
// this case should never be reached, because we are in ASCII range
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return chr(0x7F $bytes);

            case (
0x07FF $bytes) == $bytes:
                
// return a 2-byte UTF-8 character
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return chr(0xC0 | (($bytes >> 6) & 0x1F))
                     . 
chr(0x80 | ($bytes 0x3F));

            case (
0xFFFF $bytes) == $bytes:
                
// return a 3-byte UTF-8 character
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return chr(0xE0 | (($bytes >> 12) & 0x0F))
                     . 
chr(0x80 | (($bytes >> 6) & 0x3F))
                     . 
chr(0x80 | ($bytes 0x3F));
        }

        
// ignoring UTF-32 for now, sorry
        
return '';
    }

   
/**
    * convert a string from one UTF-8 char to one UTF-16 char
    *
    * Normally should be handled by mb_convert_encoding, but
    * provides a slower PHP-only method for installations
    * that lack the multibye string extension.
    *
    * @param    string  $utf8   UTF-8 character
    * @return   string  UTF-16 character
    */
    
private function utf82utf16($utf8)
    {
        
// oh please oh please oh please oh please oh please
        
if(function_exists('mb_convert_encoding')) {
            return 
mb_convert_encoding($utf8'UTF-16''UTF-8');
        }

        switch(
strlen($utf8)) {
            case 
1:
                
// this case should never be reached, because we are in ASCII range
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return $utf8;

            case 
2:
                
// return a UTF-16 character from a 2-byte UTF-8 char
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return chr(0x07 & (ord($utf8{0}) >> 2))
                     . 
chr((0xC0 & (ord($utf8{0}) << 6))
                         | (
0x3F ord($utf8{1})));

            case 
3:
                
// return a UTF-16 character from a 3-byte UTF-8 char
                // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                
return chr((0xF0 & (ord($utf8{0}) << 4))
                         | (
0x0F & (ord($utf8{1}) >> 2)))
                     . 
chr((0xC0 & (ord($utf8{1}) << 6))
                         | (
0x7F ord($utf8{2})));
        }

        
// ignoring UTF-32 for now, sorry
        
return '';
    }

   
/**
    * encodes an arbitrary variable into JSON format
    *
    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
    *                           if var is a strng, note that encode() always expects it
    *                           to be in ASCII or UTF-8 format!
    *
    * @return   mixed   JSON string representation of input var
    * @throws Exception if a problem occurs
    */
    
public function encode($var)
    {
        switch (
gettype($var)) {
            case 
'boolean':
                return 
$var 'true' 'false';

            case 
'NULL':
                return 
'null';

            case 
'integer':
                return (int) 
$var;

            case 
'double':
            case 
'float':
                return (float) 
$var;

            case 
'string':
                
// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
                
$ascii '';
                
$strlen_var strlen($var);

               
/*
                * Iterate over every character in the string,
                * escaping with a slash or encoding to UTF-8 where necessary
                */
                
for ($c 0$c $strlen_var; ++$c) {

                    
$ord_var_c ord($var{$c});

                    switch (
true) {
                        case 
$ord_var_c == 0x08:
                            
$ascii .= '\b';
                            break;
                        case 
$ord_var_c == 0x09:
                            
$ascii .= '\t';
                            break;
                        case 
$ord_var_c == 0x0A:
                            
$ascii .= '\n';
                            break;
                        case 
$ord_var_c == 0x0C:
                            
$ascii .= '\f';
                            break;
                        case 
$ord_var_c == 0x0D:
                            
$ascii .= '\r';
                            break;

                        case 
$ord_var_c == 0x22:
                        case 
$ord_var_c == 0x2F:
                        case 
$ord_var_c == 0x5C:
                            
// double quote, slash, slosh
                            
$ascii .= '\\'.$var{$c};
                            break;

                        case ((
$ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
                            
// characters U-00000000 - U-0000007F (same as ASCII)
                            
$ascii .= $var{$c};
                            break;

                        case ((
$ord_var_c 0xE0) == 0xC0):
                            
// characters U-00000080 - U-000007FF, mask 110XXXXX
                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                            
$char pack('C*'$ord_var_cord($var{$c 1}));
                            
$c += 1;
                            
$utf16 $this->utf82utf16($char);
                            
$ascii .= sprintf('\u%04s'bin2hex($utf16));
                            break;

                        case ((
$ord_var_c 0xF0) == 0xE0):
                            
// characters U-00000800 - U-0000FFFF, mask 1110XXXX
                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                            
$char pack('C*'$ord_var_c,
                                         
ord($var{$c 1}),
                                         
ord($var{$c 2}));
                            
$c += 2;
                            
$utf16 $this->utf82utf16($char);
                            
$ascii .= sprintf('\u%04s'bin2hex($utf16));
                            break;

                        case ((
$ord_var_c 0xF8) == 0xF0):
                            
// characters U-00010000 - U-001FFFFF, mask 11110XXX
                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                            
$char pack('C*'$ord_var_c,
                                         
ord($var{$c 1}),
                                         
ord($var{$c 2}),
                                         
ord($var{$c 3}));
                            
$c += 3;
                            
$utf16 $this->utf82utf16($char);
                            
$ascii .= sprintf('\u%04s'bin2hex($utf16));
                            break;

                        case ((
$ord_var_c 0xFC) == 0xF8):
                            
// characters U-00200000 - U-03FFFFFF, mask 111110XX
                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                            
$char pack('C*'$ord_var_c,
                                         
ord($var{$c 1}),
                                         
ord($var{$c 2}),
                                         
ord($var{$c 3}),
                                         
ord($var{$c 4}));
                            
$c += 4;
                            
$utf16 $this->utf82utf16($char);
                            
$ascii .= sprintf('\u%04s'bin2hex($utf16));
                            break;

                        case ((
$ord_var_c 0xFE) == 0xFC):
                            
// characters U-04000000 - U-7FFFFFFF, mask 1111110X
                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                            
$char pack('C*'$ord_var_c,
                                         
ord($var{$c 1}),
                                         
ord($var{$c 2}),
                                         
ord($var{$c 3}),
                                         
ord($var{$c 4}),
                                         
ord($var{$c 5}));
                            
$c += 5;
                            
$utf16 $this->utf82utf16($char);
                            
$ascii .= sprintf('\u%04s'bin2hex($utf16));
                            break;
                    }
                }

                return 
'"'.$ascii.'"';

            case 
'array':
               
/*
                * As per JSON spec if any array key is not an integer
                * we must treat the the whole array as an object. We
                * also try to catch a sparsely populated associative
                * array with numeric keys here because some JS engines
                * will create an array with empty indexes up to
                * max_index which can cause memory issues and because
                * the keys, which may be relevant, will be remapped
                * otherwise.
                *
                * As per the ECMA and JSON specification an object may
                * have any string as a property. Unfortunately due to
                * a hole in the ECMA specification if the key is a
                * ECMA reserved word or starts with a digit the
                * parameter is only accessible using ECMAScript's
                * bracket notation.
                */

                // treat as a JSON object
                
if (is_array($var) && count($var) && (array_keys($var) !== range(0sizeof($var) - 1))) {
                    
$properties array_map(array($this'name_value'),
                                            
array_keys($var),
                                            
array_values($var));
                    return 
'{' join(','$properties) . '}';
                }

                
// treat it like a regular array
                
$elements array_map(array($this'encode'), $var);
                return 
'[' join(','$elements) . ']';

            case 
'object':
                
$vars get_object_vars($var);

                
$properties array_map(array($this'name_value'),
                                        
array_keys($vars),
                                        
array_values($vars));
                return 
'{' join(','$properties) . '}';

            default:
                 throw new \
Exception(gettype($var)." can not be encoded as JSON string");
        }
    }

   
/**
    * array-walking function for use in generating JSON-formatted name-value pairs
    *
    * @param    string  $name   name of key to use
    * @param    mixed   $value  reference to an array element to be encoded
    *
    * @return   string  JSON-formatted name-value pair, like '"name":value'
    */
    
private function name_value($name$value)
    {
        return 
$this->encode(strval($name)) . ':' $this->encode($value);
    }

   
/**
    * reduce a string by removing leading and trailing comments and whitespace
    *
    * @param    $str    string      string value to strip of comments and whitespace
    *
    * @return   string  string value stripped of comments and whitespace
    */
    
private function reduce_string($str)
    {
        
$str preg_replace(array(

                
// eliminate single line comments in '// ...' form
                
'#^\s*//(.+)$#m',

                
// eliminate multi-line comments in '/* ... */' form, at start of string
                
'#^\s*/\*(.+)\*/#Us',

                
// eliminate multi-line comments in '/* ... */' form, at end of string
                
'#/\*(.+)\*/\s*$#Us'

            
), ''$str);

        
// eliminate extraneous space
        
return trim($str);
    }

   
/**
    * decodes a JSON string into appropriate variable
    *
    * @param    string  $str    JSON-formatted string
    *
    * @return   mixed   number, boolean, string, array, or object
    *                   corresponding to given JSON input string.
    *                   See argument 1 to Services_JSON() above for object-output behavior.
    *                   Note that decode() always returns strings
    *                   in ASCII or UTF-8 format!
    */
    
public function decode($str)
    {
        
$str $this->reduce_string($str);

        switch (
strtolower($str)) {
            case 
'true':
                return 
true;

            case 
'false':
                return 
false;

            case 
'null':
                return 
null;

            default:
                
$m = array();

                if (
is_numeric($str)) {
                    
// Lookie-loo, it's a number

                    // This would work on its own, but I'm trying to be
                    // good about returning integers where appropriate:
                    // return (float)$str;

                    // Return float or int, as appropriate
                    
return ((float)$str == (integer)$str)
                        ? (integer)
$str
                        
: (float)$str;

                } elseif (
preg_match('/^("|\').*(\1)$/s'$str$m) && $m[1] == $m[2]) {
                    
// STRINGS RETURNED IN UTF-8 FORMAT
                    
$delim substr($str01);
                    
$chrs substr($str1, -1);
                    
$utf8 '';
                    
$strlen_chrs strlen($chrs);

                    for (
$c 0$c $strlen_chrs; ++$c) {

                        
$substr_chrs_c_2 substr($chrs$c2);
                        
$ord_chrs_c ord($chrs{$c});

                        switch (
true) {
                            case 
$substr_chrs_c_2 == '\b':
                                
$utf8 .= chr(0x08);
                                ++
$c;
                                break;
                            case 
$substr_chrs_c_2 == '\t':
                                
$utf8 .= chr(0x09);
                                ++
$c;
                                break;
                            case 
$substr_chrs_c_2 == '\n':
                                
$utf8 .= chr(0x0A);
                                ++
$c;
                                break;
                            case 
$substr_chrs_c_2 == '\f':
                                
$utf8 .= chr(0x0C);
                                ++
$c;
                                break;
                            case 
$substr_chrs_c_2 == '\r':
                                
$utf8 .= chr(0x0D);
                                ++
$c;
                                break;

                            case 
$substr_chrs_c_2 == '\\"':
                            case 
$substr_chrs_c_2 == '\\\'':
                            case 
$substr_chrs_c_2 == '\\\\':
                            case 
$substr_chrs_c_2 == '\\/':
                                if ((
$delim == '"' && $substr_chrs_c_2 != '\\\'') ||
                                   (
$delim == "'" && $substr_chrs_c_2 != '\\"')) {
                                    
$utf8 .= $chrs{++$c};
                                }
                                break;

                            case 
preg_match('/\\\u[0-9A-F]{4}/i'substr($chrs$c6)):
                                
// single, escaped unicode character
                                
$utf16 chr(hexdec(substr($chrs, ($c 2), 2)))
                                       . 
chr(hexdec(substr($chrs, ($c 4), 2)));
                                
$utf8 .= $this->utf162utf8($utf16);
                                
$c += 5;
                                break;

                            case (
$ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
                                
$utf8 .= $chrs{$c};
                                break;

                            case (
$ord_chrs_c 0xE0) == 0xC0:
                                
// characters U-00000080 - U-000007FF, mask 110XXXXX
                                //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                
$utf8 .= substr($chrs$c2);
                                ++
$c;
                                break;

                            case (
$ord_chrs_c 0xF0) == 0xE0:
                                
// characters U-00000800 - U-0000FFFF, mask 1110XXXX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                
$utf8 .= substr($chrs$c3);
                                
$c += 2;
                                break;

                            case (
$ord_chrs_c 0xF8) == 0xF0:
                                
// characters U-00010000 - U-001FFFFF, mask 11110XXX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                
$utf8 .= substr($chrs$c4);
                                
$c += 3;
                                break;

                            case (
$ord_chrs_c 0xFC) == 0xF8:
                                
// characters U-00200000 - U-03FFFFFF, mask 111110XX
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                
$utf8 .= substr($chrs$c5);
                                
$c += 4;
                                break;

                            case (
$ord_chrs_c 0xFE) == 0xFC:
                                
// characters U-04000000 - U-7FFFFFFF, mask 1111110X
                                // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                
$utf8 .= substr($chrs$c6);
                                
$c += 5;
                                break;

                        }

                    }

                    return 
$utf8;

                } elseif (
preg_match('/^\[.*\]$/s'$str) || preg_match('/^\{.*\}$/s'$str)) {
                    
// array, or object notation

                    
if ($str{0} == '[') {
                        
$stk = array(SERVICES_JSON_IN_ARR);
                        
$arr = array();
                    } else {
                        if (
$this->use SERVICES_JSON_LOOSE_TYPE) {
                            
$stk = array(SERVICES_JSON_IN_OBJ);
                            
$obj = array();
                        } else {
                            
$stk = array(SERVICES_JSON_IN_OBJ);
                            
$obj = new \stdClass();
                        }
                    }

                    
array_push($stk, array('what'  => SERVICES_JSON_SLICE,
                                           
'where' => 0,
                                           
'delim' => false));

                    
$chrs substr($str1, -1);
                    
$chrs $this->reduce_string($chrs);

                    if (
$chrs == '') {
                        if (
reset($stk) == SERVICES_JSON_IN_ARR) {
                            return 
$arr;

                        } else {
                            return 
$obj;

                        }
                    }

                    
//print("\nparsing {$chrs}\n");

                    
$strlen_chrs strlen($chrs);

                    for (
$c 0$c <= $strlen_chrs; ++$c) {

                        
$top end($stk);
                        
$substr_chrs_c_2 substr($chrs$c2);

                        if ((
$c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
                            
// found a comma that is not inside a string, array, etc.,
                            // OR we've reached the end of the character list
                            
$slice substr($chrs$top['where'], ($c $top['where']));
                            
array_push($stk, array('what' => SERVICES_JSON_SLICE'where' => ($c 1), 'delim' => false));
                            
//print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

                            
if (reset($stk) == SERVICES_JSON_IN_ARR) {
                                
// we are in an array, so just push an element onto the stack
                                
array_push($arr$this->decode($slice));

                            } elseif (
reset($stk) == SERVICES_JSON_IN_OBJ) {
                                
// we are in an object, so figure
                                // out the property name and set an
                                // element in an associative array,
                                // for now
                                
$parts = array();
                                
                                if (
preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis'$slice$parts)) {
                                    
// "name":value pair
                                    
$key $this->decode($parts[1]);
                                    
$val $this->decode($parts[2]);

                                    if (
$this->use SERVICES_JSON_LOOSE_TYPE) {
                                        
$obj[$key] = $val;
                                    } else {
                                        
$obj->$key $val;
                                    }
                                } elseif (
preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis'$slice$parts)) {
                                    
// name:value pair, where name is unquoted
                                    
$key $parts[1];
                                    
$val $this->decode($parts[2]);

                                    if (
$this->use SERVICES_JSON_LOOSE_TYPE) {
                                        
$obj[$key] = $val;
                                    } else {
                                        
$obj->$key $val;
                                    }
                                }

                            }

                        } elseif (((
$chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
                            
// found a quote, and we are not inside a string
                            
array_push($stk, array('what' => SERVICES_JSON_IN_STR'where' => $c'delim' => $chrs{$c}));
                            
//print("Found start of string at {$c}\n");

                        
} elseif (($chrs{$c} == $top['delim']) &&
                                 (
$top['what'] == SERVICES_JSON_IN_STR) &&
                                 ((
strlen(substr($chrs0$c)) - strlen(rtrim(substr($chrs0$c), '\\'))) % != 1)) {
                            
// found a quote, we're in a string, and it's not escaped
                            // we know that it's not escaped becase there is _not_ an
                            // odd number of backslashes at the end of the string so far
                            
array_pop($stk);
                            
//print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");

                        
} elseif (($chrs{$c} == '[') &&
                                 
in_array($top['what'], array(SERVICES_JSON_SLICESERVICES_JSON_IN_ARRSERVICES_JSON_IN_OBJ))) {
                            
// found a left-bracket, and we are in an array, object, or slice
                            
array_push($stk, array('what' => SERVICES_JSON_IN_ARR'where' => $c'delim' => false));
                            
//print("Found start of array at {$c}\n");

                        
} elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
                            
// found a right-bracket, and we're in an array
                            
array_pop($stk);
                            
//print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

                        
} elseif (($chrs{$c} == '{') &&
                                 
in_array($top['what'], array(SERVICES_JSON_SLICESERVICES_JSON_IN_ARRSERVICES_JSON_IN_OBJ))) {
                            
// found a left-brace, and we are in an array, object, or slice
                            
array_push($stk, array('what' => SERVICES_JSON_IN_OBJ'where' => $c'delim' => false));
                            
//print("Found start of object at {$c}\n");

                        
} elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
                            
// found a right-brace, and we're in an object
                            
array_pop($stk);
                            
//print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

                        
} elseif (($substr_chrs_c_2 == '/*') &&
                                 
in_array($top['what'], array(SERVICES_JSON_SLICESERVICES_JSON_IN_ARRSERVICES_JSON_IN_OBJ))) {
                            
// found a comment start, and we are in an array, object, or slice
                            
array_push($stk, array('what' => SERVICES_JSON_IN_CMT'where' => $c'delim' => false));
                            
$c++;
                            
//print("Found start of comment at {$c}\n");

                        
} elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
                            
// found a comment end, and we're in one now
                            
array_pop($stk);
                            
$c++;

                            for (
$i $top['where']; $i <= $c; ++$i)
                                
$chrs substr_replace($chrs' '$i1);

                            
//print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

                        
}

                    }

                    if (
reset($stk) == SERVICES_JSON_IN_ARR) {
                        return 
$arr;

                    } elseif (
reset($stk) == SERVICES_JSON_IN_OBJ) {
                        return 
$obj;

                    }

                }
        }
    }
}    
?>

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