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+<?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!
+ *
+ * PHP versions 4 and 5
+ *
+ * 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
+ * @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
+ * @license http://www.freebsd.org/copyright/freebsd-license.html
+ * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198
+ */
+
+// for DokuWiki
+if(!defined('DOKU_INC')) die('meh.');
+require_once(DOKU_INC.'inc/utf8.php');
+
+/**
+ * Marker constant for JSON::decode(), used to flag stack state
+ */
+define('JSON_SLICE', 1);
+
+/**
+ * Marker constant for JSON::decode(), used to flag stack state
+ */
+define('JSON_IN_STR', 2);
+
+/**
+ * Marker constant for JSON::decode(), used to flag stack state
+ */
+define('JSON_IN_ARR', 4);
+
+/**
+ * Marker constant for JSON::decode(), used to flag stack state
+ */
+define('JSON_IN_OBJ', 8);
+
+/**
+ * Marker constant for JSON::decode(), used to flag stack state
+ */
+define('JSON_IN_CMT', 16);
+
+/**
+ * Behavior switch for JSON::decode()
+ */
+define('JSON_LOOSE_TYPE', 10);
+
+/**
+ * Behavior switch for JSON::decode()
+ */
+define('JSON_STRICT_TYPE', 11);
+
+/**
+ * Converts to and from JSON format.
+ *
+ * @category
+ * @package
+ * @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
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version
+ * @link
+ * @see
+ * @since
+ * @deprecated
+ */
+class JSON
+{
+ /**
+ * constructs a new JSON instance
+ *
+ * @param int $use object behavior: when encoding or decoding,
+ * be loose or strict about object/array usage
+ *
+ * possible values:
+ * JSON_STRICT_TYPE - strict typing, default
+ * "{...}" syntax creates objects in decode.
+ * JSON_LOOSE_TYPE - loose typing
+ * "{...}" syntax creates associative arrays in decode.
+ */
+ function JSON($use=JSON_STRICT_TYPE)
+ {
+ $this->use = $use;
+ }
+
+ /**
+ * encodes an arbitrary variable into JSON format
+ *
+ * @param mixed $var any number, boolean, string, array, or object to be encoded.
+ * see argument 1 to JSON() above for array-parsing behavior.
+ * if var is a strng, note that encode() always expects it
+ * to be in ASCII or UTF-8 format!
+ *
+ * @return string JSON string representation of input var
+ * @access public
+ */
+ function encode($var)
+ {
+ switch (gettype($var)) {
+ case 'boolean':
+ return $var ? 'true' : 'false';
+
+ case 'NULL':
+ return 'null';
+
+ case 'integer':
+ return sprintf('%d', $var);
+
+ case 'double':
+ case 'float':
+ return sprintf('%f', $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{$c});
+
+ switch ($ord_var_c) {
+ case 0x08: $ascii .= '\b'; break;
+ case 0x09: $ascii .= '\t'; break;
+ case 0x0A: $ascii .= '\n'; break;
+ case 0x0C: $ascii .= '\f'; break;
+ case 0x0D: $ascii .= '\r'; break;
+
+ case 0x22:
+ case 0x2F:
+ case 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 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
+ $utf16 = utf8_to_utf16be($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 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
+ $utf16 = utf8_to_utf16be($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 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
+ $utf16 = utf8_to_utf16be($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 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
+ $utf16 = utf8_to_utf16be($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 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
+ $utf16 = utf8_to_utf16be($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($var) - 1))) {
+ return sprintf('{%s}', join(',', array_map(array($this, 'name_value'),
+ array_keys($var),
+ array_values($var))));
+ }
+
+ // treat it like a regular array
+ return sprintf('[%s]', join(',', array_map(array($this, 'encode'), $var)));
+
+ case 'object':
+ $vars = get_object_vars($var);
+ return sprintf('{%s}', join(',', array_map(array($this, 'name_value'),
+ array_keys($vars),
+ array_values($vars))));
+
+ default:
+ return '';
+ }
+ }
+
+ /**
+ * encodes an arbitrary variable into JSON format, alias for encode()
+ */
+ function enc($var)
+ {
+ return $this->encode($var);
+ }
+
+ /** function name_value
+ * 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)
+ {
+ return (sprintf("%s:%s", $this->encode(strval($name)), $this->encode($value)));
+ }
+
+ /**
+ * reduce a string by removing leading and trailing comments and whitespace
+ *
+ * @param $str string string value to strip of comments and whitespace
+ *
+ * @return string string value stripped of comments and whitespace
+ * @access private
+ */
+ function reduce_string($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 $str JSON-formatted string
+ *
+ * @return mixed number, boolean, string, array, or object
+ * corresponding to given JSON input string.
+ * See argument 1 to JSON() above for object-output behavior.
+ * Note that decode() always returns strings
+ * in ASCII or UTF-8 format!
+ * @access public
+ */
+ function decode($str)
+ {
+ $str = $this->reduce_string($str);
+
+ switch (strtolower($str)) {
+ case 'true':
+ return true;
+
+ case 'false':
+ return false;
+
+ case 'null':
+ return null;
+
+ default:
+ if (is_numeric($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)$str;
+
+ } elseif (preg_match('/^("|\').+("|\')$/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{$c});
+
+ switch ($substr_chrs_c_2) {
+ case '\b': $utf8 .= chr(0x08); $c+=1; break;
+ case '\t': $utf8 .= chr(0x09); $c+=1; break;
+ case '\n': $utf8 .= chr(0x0A); $c+=1; break;
+ case '\f': $utf8 .= chr(0x0C); $c+=1; break;
+ case '\r': $utf8 .= chr(0x0D); $c+=1; break;
+
+ case '\\"':
+ case '\\\'':
+ case '\\\\':
+ case '\\/':
+ if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
+ ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
+ $utf8 .= $chrs{++$c};
+ }
+ break;
+
+ default:
+ if (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 .= mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
+ $utf8 .= utf16be_to_utf8($utf16);
+ $c+=5;
+
+ } elseif(($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F)) {
+ $utf8 .= $chrs{$c};
+
+ } elseif(($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); $c += 1;
+
+ } elseif(($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); $c += 2;
+
+ } elseif(($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); $c += 3;
+
+ } elseif(($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); $c += 4;
+
+ } elseif(($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(JSON_IN_ARR);
+ $arr = array();
+ } else {
+ if ($this->use == JSON_LOOSE_TYPE) {
+ $stk = array(JSON_IN_OBJ);
+ $obj = array();
+ } else {
+ $stk = array(JSON_IN_OBJ);
+ $obj = new stdClass();
+ }
+ }
+
+ array_push($stk, array('what' => JSON_SLICE,
+ 'where' => 0,
+ 'delim' => false));
+
+ $chrs = substr($str, 1, -1);
+ $chrs = $this->reduce_string($chrs);
+
+ if ($chrs == '') {
+ if (reset($stk) == 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'] == 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' => JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
+ //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
+
+ if (reset($stk) == 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) == JSON_IN_OBJ) {
+ // we are in an object, so figure
+ // out the property name and set an
+ // element in an associative array,
+ // for now
+ 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 == 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 == JSON_LOOSE_TYPE) {
+ $obj[$key] = $val;
+ } else {
+ $obj->$key = $val;
+ }
+ }
+
+ }
+
+ } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) &&
+ in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
+ // found a quote, and we are not inside a string
+ array_push($stk, array('what' => JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
+ //print("Found start of string at {$c}\n");
+
+ } elseif (($chrs{$c} == $top['delim']) &&
+ ($top['what'] == JSON_IN_STR) &&
+ (($chrs{$c - 1} != "\\") ||
+ ($chrs{$c - 1} == "\\" && $chrs{$c - 2} == "\\"))) {
+ // found a quote, we're in a string, and it's not escaped
+ 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(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
+ // found a left-bracket, and we are in an array, object, or slice
+ array_push($stk, array('what' => JSON_IN_ARR, 'where' => $c, 'delim' => false));
+ //print("Found start of array at {$c}\n");
+
+ } elseif (($chrs{$c} == ']') && ($top['what'] == JSON_IN_ARR)) {
+ // found a right-bracket, and we're in an array
+ array_pop($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(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
+ // found a left-brace, and we are in an array, object, or slice
+ array_push($stk, array('what' => JSON_IN_OBJ, 'where' => $c, 'delim' => false));
+ //print("Found start of object at {$c}\n");
+
+ } elseif (($chrs{$c} == '}') && ($top['what'] == JSON_IN_OBJ)) {
+ // found a right-brace, and we're in an object
+ array_pop($stk);
+ //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
+
+ } elseif (($substr_chrs_c_2 == '/*') &&
+ in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
+ // found a comment start, and we are in an array, object, or slice
+ array_push($stk, array('what' => JSON_IN_CMT, 'where' => $c, 'delim' => false));
+ $c++;
+ //print("Found start of comment at {$c}\n");
+
+ } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == 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) == JSON_IN_ARR) {
+ return $arr;
+
+ } elseif (reset($stk) == JSON_IN_OBJ) {
+ return $obj;
+
+ }
+
+ }
+ }
+ }
+
+ /**
+ * decodes a JSON string into appropriate variable; alias for decode()
+ */
+ function dec($var)
+ {
+ return $this->decode($var);
+ }
+
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 16:39:05 +0000