<?php
/*****************************************************************************
 *
 * oldPhpVersionFixes.php - This implements some functions which are present
 *                          in newer PHP versions but are already needed by
 *                          NagVis PHP code
 *
 * Copyright (c) 2004-2016 NagVis Project (Contact: info@nagvis.org)
 *
 * License:
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *****************************************************************************/
 
/**
 * @author	Lars Michelsen <lm@larsmichelsen.com>
 */

/**
 * This implements the function date_default_timezone_set() which is needed
 * since PHP 5.1 by all PHP date functions
 *
 * @author 	Lars Michelsen <lm@larsmichelsen.com>
 */
if(!function_exists('date_default_timezone_set')) {
	function date_default_timezone_set($timezone_identifier) {
		putenv("TZ=".$timezone_identifier);
		return TRUE;
	}
}

// To prevent the annoying and in most cases useless message:
//
// Error: (0) date() [function.date]: It is not safe to rely on the system's
// timezone settings. You are *required* to use the date.timezone setting or
// the date_default_timezone_set() function. In case you used any of those
// methods and you are still getting this warning, you most likely misspelled
// the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead
//
// Workaround the problem by setting the systems timezone as PHP default
// timezone. Don't let PHP know about that hack - it would cry again ;-).
if(function_exists("date_default_timezone_get"))
    date_default_timezone_set(@date_default_timezone_get());

if (version_compare(PHP_VERSION, '5.2.0') < 0) {

/**
 * Implements handling of PHP to JSON conversion for NagVis
 * (Needed for < PHP 5.2.0)
 *
 * Function taken from http://de.php.net/json_encode (Steve 01-May-2008 02:35)
 *
 * @param		String		Debug message
 * @author 	Lars Michelsen <lm@larsmichelsen.com>
 */
if (!function_exists('json_encode')) {
        define('COMPAT_JSON_ENCODE', True);
	function json_encode($a=false) {
		if (is_null($a)) return 'null';
		if ($a === false) return 'false';
		if ($a === true) return 'true';
		if (is_scalar($a)) {
			if (is_float($a)) {
				// Always use "." for floats.
				return floatval(str_replace(",", ".", strval($a)));
			}

			if (is_string($a)) {
				static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
				return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
			}
			else
				return $a;
		}
		$isList = true;
		for ($i = 0, reset($a); $i < count($a); $i++, next($a)) {
			if (key($a) !== $i) {
				$isList = false;
				break;
			}
		}
		$result = array();
		if ($isList) {
			foreach ($a as $v) $result[] = json_encode($v);
			return '[' . join(',', $result) . ']';
		} else {
			foreach ($a as $k => $v) $result[] = json_encode($k).':'.json_encode($v);
			return '{' . join(',', $result) . '}';
		}
	}
} else {
    define('COMPAT_JSON_ENCODE', False);
}

/**
 * Implements handling of PHP to JSON conversion for NagVis
 * (Needed for < PHP 5.2.0)
 *
 * Function taken from http://de.php.net/json_decode (www at walidator dot info 30-May-2009 02:16)
 * hope thats okay...
 *
 * @param   String    Debug message
 * @author  Lars Michelsen <lm@larsmichelsen.com>
 */
if(!function_exists('json_decode')){
        define('COMPAT_JSON_DECODE', True);

if(!class_exists('Services_JSON')) {
	/**
	* 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     $use    object behavior flags; combine with boolean-OR
			*
			*                           possible values:
			*                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
			*                                   "{...}" syntax creates associative arrays
			*                                   instead of objects in decode().
			*                           - SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
			*                                   Values which can't be encoded (e.g. resources)
			*                                   appear as NULL instead of throwing errors.
			*                                   By default, a deeply-nested resource will
			*                                   bubble up with an error, so all return values
			*                                   from encode() should be checked with isError()
			*/
			function __construct($use = 0)
			{
					$this->use = $use;
			}

		/**
			* convert a string from one UTF-16 char to one UTF-8 char
			*
			* Normally should be handled by mb_convert_encoding, but
			* provides a slower PHP-only method for installations
			* that lack the multibye string extension.
			*
			* @param    string  $utf16  UTF-16 character
			* @return   string  UTF-8 character
			* @access   private
			*/
			function utf162utf8($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 __construct($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 __construct($message = 'unknown error', $code = null,
																			$mode = null, $options = null, $userinfo = null)
					{

					}
			}

	}

			function json_decode($content, $assoc=false){
					if ( $assoc ){
							$json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
					} else {
							$json = new Services_JSON;
					}
					return $json->decode($content);
			}
	}
} else {
        define('COMPAT_JSON_DECODE', False);
}

if(!class_exists('PEAR_Error')) {
	/**
	 * Standard PEAR error class for PHP 4
	 *
	 * This class is supserseded by {@link PEAR_Exception} in PHP 5
	 *
	 * @category   pear
	 * @package    PEAR
	 * @author     Stig Bakken <ssb@php.net>
	 * @author     Tomas V.V. Cox <cox@idecnet.com>
	 * @author     Gregory Beaver <cellog@php.net>
	 * @copyright  1997-2006 The PHP Group
	 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
	 * @version    Release: 1.7.2
	 * @link       http://pear.php.net/manual/en/core.pear.pear-error.php
	 * @see        PEAR::raiseError(), PEAR::throwError()
	 * @since      Class available since PHP 4.0.2
	 */
	class PEAR_Error {
	    var $error_message_prefix = '';
	    var $mode                 = PEAR_ERROR_RETURN;
	    var $level                = E_USER_NOTICE;
	    var $code                 = -1;
	    var $message              = '';
	    var $userinfo             = '';
	    var $backtrace            = null;
	    
	    /**
	     * PEAR_Error constructor
	     *
	     * @param string $message  message
	     *
	     * @param int $code     (optional) error code
	     *
	     * @param int $mode     (optional) error mode, one of: PEAR_ERROR_RETURN,
	     *  PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER,
	     *  PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION
	     *
	     * @param mixed $options   (optional) error level, _OR_ in the case of
	     *  PEAR_ERROR_CALLBACK, the callback function or object/method
	     *  tuple.
	     *
	     * @param string $userinfo (optional) additional user/debug info
	     *
	     * @access public
	     *
	     */
	    function __construct($message = 'unknown error', $code = null,
	                        $mode = null, $options = null, $userinfo = null) {
	        if ($mode === null) {
	            $mode = PEAR_ERROR_RETURN;
	        }
	        $this->message   = $message;
	        $this->code      = $code;
	        $this->mode      = $mode;
	        $this->userinfo  = $userinfo;
	        if (!PEAR::getStaticProperty('PEAR_Error', 'skiptrace')) {
	            $this->backtrace = debug_backtrace();
	            if (isset($this->backtrace[0]) && isset($this->backtrace[0]['object'])) {
	                unset($this->backtrace[0]['object']);
	            }
	        }
	        if ($mode & PEAR_ERROR_CALLBACK) {
	            $this->level = E_USER_NOTICE;
	            $this->callback = $options;
	        } else {
	            if ($options === null) {
	                $options = E_USER_NOTICE;
	            }
	            $this->level = $options;
	            $this->callback = null;
	        }
	        if ($this->mode & PEAR_ERROR_PRINT) {
	            if (is_null($options) || is_int($options)) {
	                $format = "%s";
	            } else {
	                $format = $options;
	            }
	            printf($format, $this->getMessage());
	        }
	        if ($this->mode & PEAR_ERROR_TRIGGER) {
	            trigger_error($this->getMessage(), $this->level);
	        }
	        if ($this->mode & PEAR_ERROR_DIE) {
	            $msg = $this->getMessage();
	            if (is_null($options) || is_int($options)) {
	                $format = "%s";
	                if (substr($msg, -1) != "\n") {
	                    $msg .= "\n";
	                }
	            } else {
	                $format = $options;
	            }
	            die(sprintf($format, $msg));
	        }
	        if ($this->mode & PEAR_ERROR_CALLBACK) {
	            if (is_callable($this->callback)) {
	                call_user_func($this->callback, $this);
	            }
	        }
	        if ($this->mode & PEAR_ERROR_EXCEPTION) {
	            trigger_error("PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_Exception for exceptions", E_USER_WARNING);
	            eval('$e = new Exception($this->message, $this->code);throw($e);');
	        }
	    }
	 
	    /**
	     * Get the error mode from an error object.
	     *
	     * @return int error mode
	     * @access public
	     */
	    function getMode() {
	        return $this->mode;
	    }
	 
	    /**
	     * Get the callback function/method from an error object.
	     *
	     * @return mixed callback function or object/method array
	     * @access public
	     */
	    function getCallback() {
	        return $this->callback;
	    }
	 
	    /**
	     * Get the error message from an error object.
	     *
	     * @return  string  full error message
	     * @access public
	     */
	    function getMessage()
	    {
	        return ($this->error_message_prefix . $this->message);
	    }
	 
	    /**
	     * Get error code from an error object
	     *
	     * @return int error code
	     * @access public
	     */
	     function getCode()
	     {
	        return $this->code;
	     }
	 
	    /**
	     * Get the name of this error/exception.
	     *
	     * @return string error/exception name (type)
	     * @access public
	     */
	    function getType()
	    {
	        return get_class($this);
	    }
	 
	    /**
	     * Get additional user-supplied information.
	     *
	     * @return string user-supplied information
	     * @access public
	     */
	    function getUserInfo()
	    {
	        return $this->userinfo;
	    }
	 
	    /**
	     * Get additional debug information supplied by the application.
	     *
	     * @return string debug information
	     * @access public
	     */
	    function getDebugInfo()
	    {
	        return $this->getUserInfo();
	    }
	 
	    /**
	     * Get the call backtrace from where the error was generated.
	     * Supported with PHP 4.3.0 or newer.
	     *
	     * @param int $frame (optional) what frame to fetch
	     * @return array Backtrace, or NULL if not available.
	     * @access public
	     */
	    function getBacktrace($frame = null)
	    {
	        if (defined('PEAR_IGNORE_BACKTRACE')) {
	            return null;
	        }
	        if ($frame === null) {
	            return $this->backtrace;
	        }
	        return $this->backtrace[$frame];
	    }
	 
	    function addUserInfo($info)
	    {
	        if (empty($this->userinfo)) {
	            $this->userinfo = $info;
	        } else {
	            $this->userinfo .= " ** $info";
	        }
	    }
	 
	    function __toString()
	    {
	        return $this->getMessage();
	    }
	 
	    /**
	     * Make a string representation of this object.
	     *
	     * @return string a string with an object summary
	     * @access public
	     */
	    function toString() {
	        $modes = array();
	        $levels = array(E_USER_NOTICE  => 'notice',
	                        E_USER_WARNING => 'warning',
	                        E_USER_ERROR   => 'error');
	        if ($this->mode & PEAR_ERROR_CALLBACK) {
	            if (is_array($this->callback)) {
	                $callback = (is_object($this->callback[0]) ?
	                    strtolower(get_class($this->callback[0])) :
	                    $this->callback[0]) . '::' .
	                    $this->callback[1];
	            } else {
	                $callback = $this->callback;
	            }
	            return sprintf('[%s: message="%s" code=%d mode=callback '.
	                           'callback=%s prefix="%s" info="%s"]',
	                           strtolower(get_class($this)), $this->message, $this->code,
	                           $callback, $this->error_message_prefix,
	                           $this->userinfo);
	        }
	        if ($this->mode & PEAR_ERROR_PRINT) {
	            $modes[] = 'print';
	        }
	        if ($this->mode & PEAR_ERROR_TRIGGER) {
	            $modes[] = 'trigger';
	        }
	        if ($this->mode & PEAR_ERROR_DIE) {
	            $modes[] = 'die';
	        }
	        if ($this->mode & PEAR_ERROR_RETURN) {
	            $modes[] = 'return';
	        }
	        return sprintf('[%s: message="%s" code=%d mode=%s level=%s '.
	                       'prefix="%s" info="%s"]',
	                       strtolower(get_class($this)), $this->message, $this->code,
	                       implode("|", $modes), $levels[$this->level],
	                       $this->error_message_prefix,
	                       $this->userinfo);
	    }
	}
}

}
else {
        define('COMPAT_JSON_ENCODE', False);
        define('COMPAT_JSON_DECODE', False);
}
?>
