Enano CMS (1.0.x): comparison includes/json.php

equal deleted inserted replaced

-:902822492a68
+:fe660c52c48f
+<?php
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+/**
+* 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>
+* @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
+*/
+define('SERVICES_JSON_SLICE',   1);
+/**
+* Marker constant for Services_JSON::decode(), used to flag stack state
+*/
+define('SERVICES_JSON_IN_STR',  2);
+/**
+* Marker constant for Services_JSON::decode(), used to flag stack state
+*/
+define('SERVICES_JSON_IN_ARR',  3);
+/**
+* Marker constant for Services_JSON::decode(), used to flag stack state
+*/
+define('SERVICES_JSON_IN_OBJ',  4);
+/**
+* Marker constant for Services_JSON::decode(), used to flag stack state
+*/
+define('SERVICES_JSON_IN_CMT', 5);
+/**
+* Behavior switch for Services_JSON::decode()
+*/
+define('SERVICES_JSON_LOOSE_TYPE', 16);
+/**
+* Behavior switch for Services_JSON::decode()
+*/
+define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
+/**
+* Converts to and from JSON format.
+*
+* Brief example of use:
+*
+* <code>
+// create a new instance of Services_JSON
+$json = new Services_JSON();
+// convert a complexe value to JSON notation, and send it to the browser
+$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
+*
+* @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
+*
+* @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 (($ord_var_c & 0xE0) == 0xC0):
+// characters U-00000080 - U-000007FF, mask 110XXXXX
+// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+$char = pack('C*', $ord_var_c, ord($var{$c + 1}));
+$c += 1;
+$utf16 = $this->utf82utf16($char);
+$ascii .= sprintf('\u%04s', bin2hex($utf16));
+break;
+case (($ord_var_c & 0xF0) == 0xE0):
+// characters U-00000800 - U-0000FFFF, mask 1110XXXX
+// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+$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(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;
+}
+}
+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, $userinfo);
+}
+}
+} else {
+/**
+* @todo Ultimately, this class shall be descended from PEAR_Error
+*/
+class Services_JSON_Error
+{
+function Services_JSON_Error($message = 'unknown error', $code = null,
+$mode = null, $options = null, $userinfo = null)
+{
+}
+}
+}
+?>