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Diffstat (limited to 'vendors/dokuwiki/inc/JSON.php')
| -rw-r--r-- | vendors/dokuwiki/inc/JSON.php | 624 | 
1 files changed, 624 insertions, 0 deletions
diff --git a/vendors/dokuwiki/inc/JSON.php b/vendors/dokuwiki/inc/JSON.php new file mode 100644 index 000000000..ea66c9c32 --- /dev/null +++ b/vendors/dokuwiki/inc/JSON.php @@ -0,0 +1,624 @@ +<?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); +    } + +} +  | 
