Wordpress 3.6
[autoinstalls/wordpress.git] / wp-includes / class-json.php
index 58f6f7de2863ade31832939646d5ae2f83e163ad..417592fb88ba331e11f9b259bc30d854a75b24eb 100644 (file)
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists( 'Services_JSON' ) ) :
+if ( ! class_exists( 'Services_JSON' ) ) :
 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
 /**
  * Converts to and from JSON format.
@@ -46,20 +46,20 @@ if ( !class_exists( 'Services_JSON' ) ) :
  * 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>
- * @copyright  2005 Michal Migurski
- * @version     CVS: $Id: JSON.php 288200 2009-09-09 15:41:29Z alan_k $
- * @license            http://www.opensource.org/licenses/bsd-license.php
- * @link               http://pear.php.net/pepr/pepr-proposal-show.php?id=198
+ * @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>
+ * @copyright   2005 Michal Migurski
+ * @version     CVS: $Id: JSON.php 305040 2010-11-02 23:19:03Z alan_k $
+ * @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
  */
-define('SERVICES_JSON_SLICE', 1);
+define('SERVICES_JSON_SLICE',   1);
 
 /**
  * Marker constant for Services_JSON::decode(), used to flag stack state
@@ -91,6 +91,11 @@ define('SERVICES_JSON_LOOSE_TYPE', 16);
  */
 define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
 
+/**
+ * Behavior switch for Services_JSON::decode()
+ */
+define('SERVICES_JSON_USE_TO_JSON', 64);
+
 /**
  * Converts to and from JSON format.
  *
@@ -114,749 +119,818 @@ define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
  */
 class Services_JSON
 {
- /**
-       * constructs a new JSON instance
-       *
-       * @param int $use object behavior flags; combine with boolean-OR
-       *
-       *                                               possible values:
-       *                                               - SERVICES_JSON_LOOSE_TYPE:  loose typing.
-       *                                                               "{...}" syntax creates associative arrays
-       *                                                               instead of objects in decode().
-       *                                               - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
-       *                                                               Values which can't be encoded (e.g. resources)
-       *                                                               appear as NULL instead of throwing errors.
-       *                                                               By default, a deeply-nested resource will
-       *                                                               bubble up with an error, so all return values
-       *                                                               from encode() should be checked with isError()
-       */
-       function Services_JSON($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  $utf16  UTF-16 character
-       * @return string  UTF-8 character
-       * @access private
-       */
-       function utf162utf8($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  $utf8 UTF-8 character
-       * @return string  UTF-16 character
-       * @access private
-       */
-       function utf82utf16($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 (and sends JSON Header)
-       *
-       * @param        mixed $var      any number, boolean, string, array, or object to be encoded.
-       *                                               see argument 1 to Services_JSON() above for array-parsing behavior.
-       *                                               if var is a strng, note that encode() always expects it
-       *                                               to be in ASCII or UTF-8 format!
-       *
-       * @return mixed JSON string representation of input var or an error if a problem occurs
-       * @access public
-       */
-       function encode($var)
-       {
-               header('Content-type: application/json');
-               return $this->_encode($var);
-       }
-       /**
-       * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow CSS!!!!)
-       *
-       * @param        mixed $var      any number, boolean, string, array, or object to be encoded.
-       *                                               see argument 1 to Services_JSON() above for array-parsing behavior.
-       *                                               if var is a strng, note that encode() always expects it
-       *                                               to be in ASCII or UTF-8 format!
-       *
-       * @return mixed JSON string representation of input var or an error if a problem occurs
-       * @access public
-       */
-       function encodeUnsafe($var)
-       {
-               return $this->_encode($var);
-       }
-       /**
-       * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format
-       *
-       * @param        mixed $var      any number, boolean, string, array, or object to be encoded.
-       *                                               see argument 1 to Services_JSON() above for array-parsing behavior.
-       *                                               if var is a strng, note that encode() always expects it
-       *                                               to be in ASCII or UTF-8 format!
-       *
-       * @return mixed JSON string representation of input var or an error if a problem occurs
-       * @access public
-       */
-       function _encode($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 (($ord_var_c & 0xE0) == 0xC0):
-                                                       // characters U-00000080 - U-000007FF, mask 110XXXXX
-                                                       // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
-                                                       if ($c+1 >= $strlen_var) {
-                                                               $c += 1;
-                                                               $ascii .= '?';
-                                                               break;
-                                                       }
-
-                                                       $char = pack('C*', $ord_var_c, ord($var[$c + 1]));
-                                                       $c += 1;
-                                                       $utf16 = $this->utf82utf16($char);
-                                                       $ascii .= sprintf('\u%04s', bin2hex($utf16));
-                                                       break;
-
-                                               case (($ord_var_c & 0xF0) == 0xE0):
-                                                       if ($c+2 >= $strlen_var) {
-                                                               $c += 2;
-                                                               $ascii .= '?';
-                                                               break;
-                                                       }
-                                                       // 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 (($ord_var_c & 0xF8) == 0xF0):
-                                                       if ($c+3 >= $strlen_var) {
-                                                               $c += 3;
-                                                               $ascii .= '?';
-                                                               break;
-                                                       }
-                                                       // 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 (($ord_var_c & 0xFC) == 0xF8):
-                                                       // characters U-00200000 - U-03FFFFFF, mask 111110XX
-                                                       // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
-                                                       if ($c+4 >= $strlen_var) {
-                                                               $c += 4;
-                                                               $ascii .= '?';
-                                                               break;
-                                                       }
-                                                       $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 (($ord_var_c & 0xFE) == 0xFC):
-                                               if ($c+5 >= $strlen_var) {
-                                                               $c += 5;
-                                                               $ascii .= '?';
-                                                               break;
-                                                       }
-                                                       // 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(0, sizeof($var) - 1))) {
-                                       $properties = array_map(array($this, 'name_value'),
-                                                                                       array_keys($var),
-                                                                                       array_values($var));
-
-                                       foreach($properties as $property) {
-                                               if(Services_JSON::isError($property)) {
-                                                       return $property;
-                                               }
-                                       }
-
-                                       return '{' . join(',', $properties) . '}';
-                               }
-
-                               // treat it like a regular array
-                               $elements = array_map(array($this, '_encode'), $var);
-
-                               foreach($elements as $element) {
-                                       if(Services_JSON::isError($element)) {
-                                               return $element;
-                                       }
-                               }
-
-                               return '[' . join(',', $elements) . ']';
-
-                       case 'object':
-                               $vars = get_object_vars($var);
-
-                               $properties = array_map(array($this, 'name_value'),
-                                                                               array_keys($vars),
-                                                                               array_values($vars));
-
-                               foreach($properties as $property) {
-                                       if(Services_JSON::isError($property)) {
-                                               return $property;
-                                       }
-                               }
-
-                               return '{' . join(',', $properties) . '}';
-
-                       default:
-                               return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
-                                       ? 'null'
-                                       : new Services_JSON_Error(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 $value  reference to an array element to be encoded
-       *
-       * @return string  JSON-formatted name-value pair, like '"name":value'
-       * @access private
-       */
-       function name_value($name, $value)
-       {
-               $encoded_value = $this->_encode($value);
-
-               if(Services_JSON::isError($encoded_value)) {
-                       return $encoded_value;
-               }
-
-               return $this->_encode(strval($name)) . ':' . $encoded_value;
-       }
-
- /**
-       * reduce a string by removing leading and trailing comments and whitespace
-       *
-       * @param        $str    string  string value to strip of comments and whitespace
-       *
-       * @return string  string value stripped of comments and whitespace
-       * @access private
-       */
-       function reduce_string($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  $str    JSON-formatted string
-       *
-       * @return mixed number, boolean, string, array, or object
-       *                               corresponding to given JSON input string.
-       *                               See argument 1 to Services_JSON() above for object-output behavior.
-       *                               Note that decode() always returns strings
-       *                               in ASCII or UTF-8 format!
-       * @access public
-       */
-       function decode($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
-                                       $delim = substr($str, 0, 1);
-                                       $chrs = substr($str, 1, -1);
-                                       $utf8 = '';
-                                       $strlen_chrs = strlen($chrs);
-
-                                       for ($c = 0; $c < $strlen_chrs; ++$c) {
-
-                                               $substr_chrs_c_2 = substr($chrs, $c, 2);
-                                               $ord_chrs_c = ord($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, $c, 6)):
-                                                               // 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, $c, 2);
-                                                               ++$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, $c, 3);
-                                                               $c += 2;
-                                                               break;
-
-                                                       case ($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, $c, 4);
-                                                               $c += 3;
-                                                               break;
-
-                                                       case ($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, $c, 5);
-                                                               $c += 4;
-                                                               break;
-
-                                                       case ($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, $c, 6);
-                                                               $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));
-
-                                       $chrs = substr($str, 1, -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, $c, 2);
-
-                                               if (($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($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {
-                                                       // found a quote, we're in a string, and it's not escaped
-                                                       // we know that it's not escaped becase there is _not_ an
-                                                       // odd number of backslashes at the end of the string so far
-                                                       array_pop($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_SLICE, SERVICES_JSON_IN_ARR, SERVICES_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_SLICE, SERVICES_JSON_IN_ARR, SERVICES_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($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
-                                                       // found a comment start, and we are in an array, object, or slice
-                                                       array_push($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, ' ', $i, 1);
-
-                                                       //print("Found end of comment at {$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 $obj;
-
-                                       }
-
-                               }
-               }
-       }
-
-       /**
-       * @todo Ultimately, this should just call PEAR::isError()
-       */
-       function isError($data, $code = null)
-       {
-               if (class_exists('pear')) {
-                       return PEAR::isError($data, $code);
-               } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
-                                                               is_subclass_of($data, 'services_json_error'))) {
-                       return true;
-               }
-
-               return false;
-       }
+   /**
+    * constructs a new JSON instance
+    *
+    * @param    int     $use    object behavior flags; combine with boolean-OR
+    *
+    *                           possible values:
+    *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
+    *                                   "{...}" syntax creates associative arrays
+    *                                   instead of objects in decode().
+    *                           - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
+    *                                   Values which can't be encoded (e.g. resources)
+    *                                   appear as NULL instead of throwing errors.
+    *                                   By default, a deeply-nested resource will
+    *                                   bubble up with an error, so all return values
+    *                                   from encode() should be checked with isError()
+    *                           - SERVICES_JSON_USE_TO_JSON:  call toJSON when serializing objects
+    *                                   It serializes the return value from the toJSON call rather 
+    *                                   than the object it'self,  toJSON can return associative arrays, 
+    *                                   strings or numbers, if you return an object, make sure it does
+    *                                   not have a toJSON method, otherwise an error will occur.
+    */
+    function Services_JSON($use = 0)
+    {
+        $this->use = $use;
+        $this->_mb_strlen            = function_exists('mb_strlen');
+        $this->_mb_convert_encoding  = function_exists('mb_convert_encoding');
+        $this->_mb_substr            = function_exists('mb_substr');
+    }
+    // private - cache the mbstring lookup results..
+    var $_mb_strlen = false;
+    var $_mb_substr = false;
+    var $_mb_convert_encoding = false;
+    
+   /**
+    * 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  $utf16  UTF-16 character
+    * @return   string  UTF-8 character
+    * @access   private
+    */
+    function utf162utf8($utf16)
+    {
+        // oh please oh please oh please oh please oh please
+        if($this->_mb_convert_encoding) {
+            return mb_convert_encoding($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  $utf8   UTF-8 character
+    * @return   string  UTF-16 character
+    * @access   private
+    */
+    function utf82utf16($utf8)
+    {
+        // oh please oh please oh please oh please oh please
+        if($this->_mb_convert_encoding) {
+            return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
+        }
+
+        switch($this->strlen8($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 (and sends JSON Header)
+    *
+    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
+    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
+    *                           if var is a strng, note that encode() always expects it
+    *                           to be in ASCII or UTF-8 format!
+    *
+    * @return   mixed   JSON string representation of input var or an error if a problem occurs
+    * @access   public
+    */
+    function encode($var)
+    {
+        header('Content-type: application/json');
+        return $this->encodeUnsafe($var);
+    }
+    /**
+    * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow XSS!!!!)
+    *
+    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
+    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
+    *                           if var is a strng, note that encode() always expects it
+    *                           to be in ASCII or UTF-8 format!
+    *
+    * @return   mixed   JSON string representation of input var or an error if a problem occurs
+    * @access   public
+    */
+    function encodeUnsafe($var)
+    {
+        // see bug #16908 - regarding numeric locale printing
+        $lc = setlocale(LC_NUMERIC, 0);
+        setlocale(LC_NUMERIC, 'C');
+        $ret = $this->_encode($var);
+        setlocale(LC_NUMERIC, $lc);
+        return $ret;
+        
+    }
+    /**
+    * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 
+    *
+    * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
+    *                           see argument 1 to Services_JSON() above for array-parsing behavior.
+    *                           if var is a strng, note that encode() always expects it
+    *                           to be in ASCII or UTF-8 format!
+    *
+    * @return   mixed   JSON string representation of input var or an error if a problem occurs
+    * @access   public
+    */
+    function _encode($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 = $this->strlen8($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 (($ord_var_c & 0xE0) == 0xC0):
+                            // characters U-00000080 - U-000007FF, mask 110XXXXX
+                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+                            if ($c+1 >= $strlen_var) {
+                                $c += 1;
+                                $ascii .= '?';
+                                break;
+                            }
+                            
+                            $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
+                            $c += 1;
+                            $utf16 = $this->utf82utf16($char);
+                            $ascii .= sprintf('\u%04s', bin2hex($utf16));
+                            break;
+
+                        case (($ord_var_c & 0xF0) == 0xE0):
+                            if ($c+2 >= $strlen_var) {
+                                $c += 2;
+                                $ascii .= '?';
+                                break;
+                            }
+                            // 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 (($ord_var_c & 0xF8) == 0xF0):
+                            if ($c+3 >= $strlen_var) {
+                                $c += 3;
+                                $ascii .= '?';
+                                break;
+                            }
+                            // 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 (($ord_var_c & 0xFC) == 0xF8):
+                            // characters U-00200000 - U-03FFFFFF, mask 111110XX
+                            // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+                            if ($c+4 >= $strlen_var) {
+                                $c += 4;
+                                $ascii .= '?';
+                                break;
+                            }
+                            $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 (($ord_var_c & 0xFE) == 0xFC):
+                        if ($c+5 >= $strlen_var) {
+                                $c += 5;
+                                $ascii .= '?';
+                                break;
+                            }
+                            // 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(0, sizeof($var) - 1))) {
+                    $properties = array_map(array($this, 'name_value'),
+                                            array_keys($var),
+                                            array_values($var));
+
+                    foreach($properties as $property) {
+                        if(Services_JSON::isError($property)) {
+                            return $property;
+                        }
+                    }
+
+                    return '{' . join(',', $properties) . '}';
+                }
+
+                // treat it like a regular array
+                $elements = array_map(array($this, '_encode'), $var);
+
+                foreach($elements as $element) {
+                    if(Services_JSON::isError($element)) {
+                        return $element;
+                    }
+                }
+
+                return '[' . join(',', $elements) . ']';
+
+            case 'object':
+            
+                // support toJSON methods.
+                if (($this->use & SERVICES_JSON_USE_TO_JSON) && method_exists($var, 'toJSON')) {
+                    // this may end up allowing unlimited recursion
+                    // so we check the return value to make sure it's not got the same method.
+                    $recode = $var->toJSON();
+                    
+                    if (method_exists($recode, 'toJSON')) {
+                        
+                        return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
+                        ? 'null'
+                        : new Services_JSON_Error(get_class($var).
+                            " toJSON returned an object with a toJSON method.");
+                            
+                    }
+                    
+                    return $this->_encode( $recode );
+                } 
+                
+                $vars = get_object_vars($var);
+                
+                $properties = array_map(array($this, 'name_value'),
+                                        array_keys($vars),
+                                        array_values($vars));
+
+                foreach($properties as $property) {
+                    if(Services_JSON::isError($property)) {
+                        return $property;
+                    }
+                }
+
+                return '{' . join(',', $properties) . '}';
+
+            default:
+                return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
+                    ? 'null'
+                    : new Services_JSON_Error(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   $value  reference to an array element to be encoded
+    *
+    * @return   string  JSON-formatted name-value pair, like '"name":value'
+    * @access   private
+    */
+    function name_value($name, $value)
+    {
+        $encoded_value = $this->_encode($value);
+
+        if(Services_JSON::isError($encoded_value)) {
+            return $encoded_value;
+        }
+
+        return $this->_encode(strval($name)) . ':' . $encoded_value;
+    }
+
+   /**
+    * reduce a string by removing leading and trailing comments and whitespace
+    *
+    * @param    $str    string      string value to strip of comments and whitespace
+    *
+    * @return   string  string value stripped of comments and whitespace
+    * @access   private
+    */
+    function reduce_string($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  $str    JSON-formatted string
+    *
+    * @return   mixed   number, boolean, string, array, or object
+    *                   corresponding to given JSON input string.
+    *                   See argument 1 to Services_JSON() above for object-output behavior.
+    *                   Note that decode() always returns strings
+    *                   in ASCII or UTF-8 format!
+    * @access   public
+    */
+    function decode($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 = $this->substr8($str, 0, 1);
+                    $chrs = $this->substr8($str, 1, -1);
+                    $utf8 = '';
+                    $strlen_chrs = $this->strlen8($chrs);
+
+                    for ($c = 0; $c < $strlen_chrs; ++$c) {
+
+                        $substr_chrs_c_2 = $this->substr8($chrs, $c, 2);
+                        $ord_chrs_c = ord($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', $this->substr8($chrs, $c, 6)):
+                                // single, escaped unicode character
+                                $utf16 = chr(hexdec($this->substr8($chrs, ($c + 2), 2)))
+                                       . chr(hexdec($this->substr8($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 .= $this->substr8($chrs, $c, 2);
+                                ++$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 .= $this->substr8($chrs, $c, 3);
+                                $c += 2;
+                                break;
+
+                            case ($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 .= $this->substr8($chrs, $c, 4);
+                                $c += 3;
+                                break;
+
+                            case ($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 .= $this->substr8($chrs, $c, 5);
+                                $c += 4;
+                                break;
+
+                            case ($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 .= $this->substr8($chrs, $c, 6);
+                                $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 = $this->substr8($str, 1, -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 = $this->strlen8($chrs);
+
+                    for ($c = 0; $c <= $strlen_chrs; ++$c) {
+
+                        $top = end($stk);
+                        $substr_chrs_c_2 = $this->substr8($chrs, $c, 2);
+
+                        if (($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 = $this->substr8($chrs, $top['where'], ($c - $top['where']));
+                            array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
+                            //print("Found split at {$c}: ".$this->substr8($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*:/Uis', $slice, $parts)) {
+                                     // "name":value pair
+                                    $key = $this->decode($parts[1]);
+                                    $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B"));
+                                    if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
+                                        $obj[$key] = $val;
+                                    } else {
+                                        $obj->$key = $val;
+                                    }
+                                } elseif (preg_match('/^\s*(\w+)\s*:/Uis', $slice, $parts)) {
+                                    // name:value pair, where name is unquoted
+                                    $key = $parts[1];
+                                    $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B"));
+
+                                    if ($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) &&
+                                 (($this->strlen8($this->substr8($chrs, 0, $c)) - $this->strlen8(rtrim($this->substr8($chrs, 0, $c), '\\'))) % 2 != 1)) {
+                            // found a quote, we're in a string, and it's not escaped
+                            // we know that it's not escaped becase there is _not_ an
+                            // odd number of backslashes at the end of the string so far
+                            array_pop($stk);
+                            //print("Found end of string at {$c}: ".$this->substr8($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
+
+                        } elseif (($chrs{$c} == '[') &&
+                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_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 {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n");
+
+                        } elseif (($chrs{$c} == '{') &&
+                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_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 {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n");
+
+                        } elseif (($substr_chrs_c_2 == '/*') &&
+                                 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
+                            // found a comment start, and we are in an array, object, or slice
+                            array_push($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, ' ', $i, 1);
+
+                            //print("Found end of comment at {$c}: ".$this->substr8($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 $obj;
+
+                    }
+
+                }
+        }
+    }
+
+    /**
+     * @todo Ultimately, this should just call PEAR::isError()
+     */
+    function isError($data, $code = null)
+    {
+        if (class_exists('pear')) {
+            return PEAR::isError($data, $code);
+        } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
+                                 is_subclass_of($data, 'services_json_error'))) {
+            return true;
+        }
+
+        return false;
+    }
+    
+    /**
+    * Calculates length of string in bytes
+    * @param string 
+    * @return integer length
+    */
+    function strlen8( $str ) 
+    {
+        if ( $this->_mb_strlen ) {
+            return mb_strlen( $str, "8bit" );
+        }
+        return strlen( $str );
+    }
+    
+    /**
+    * Returns part of a string, interpreting $start and $length as number of bytes.
+    * @param string 
+    * @param integer start 
+    * @param integer length 
+    * @return integer length
+    */
+    function substr8( $string, $start, $length=false ) 
+    {
+        if ( $length === false ) {
+            $length = $this->strlen8( $string ) - $start;
+        }
+        if ( $this->_mb_substr ) {
+            return mb_substr( $string, $start, $length, "8bit" );
+        }
+        return substr( $string, $start, $length );
+    }
+
 }
 
 if (class_exists('PEAR_Error')) {
 
-       class Services_JSON_Error extends PEAR_Error
-       {
-               function Services_JSON_Error($message = 'unknown error', $code = null,
-                                                                       $mode = null, $options = null, $userinfo = null)
-               {
-                       parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
-               }
-       }
+    class Services_JSON_Error extends PEAR_Error
+    {
+        function Services_JSON_Error($message = 'unknown error', $code = null,
+                                     $mode = null, $options = null, $userinfo = null)
+        {
+            parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
+        }
+    }
 
 } else {
 
-       /**
-       * @todo Ultimately, this class shall be descended from PEAR_Error
-       */
-       class Services_JSON_Error
-       {
-               function Services_JSON_Error($message = 'unknown error', $code = null,
-                                                                       $mode = null, $options = null, $userinfo = null)
-               {
-
-               }
-       }
-
+    /**
+     * @todo Ultimately, this class shall be descended from PEAR_Error
+     */
+    class Services_JSON_Error
+    {
+        function Services_JSON_Error($message = 'unknown error', $code = null,
+                                     $mode = null, $options = null, $userinfo = null)
+        {
+
+        }
+    }
+    
 }
+
 endif;