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<?php |
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
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|
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/** |
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* Converts to and from JSON format. |
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* |
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* JSON (JavaScript Object Notation) is a lightweight data-interchange |
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* format. It is easy for humans to read and write. It is easy for machines |
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* to parse and generate. It is based on a subset of the JavaScript |
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* Programming Language, Standard ECMA-262 3rd Edition - December 1999. |
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* This feature can also be found in Python. JSON is a text format that is |
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* completely language independent but uses conventions that are familiar |
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* to programmers of the C-family of languages, including C, C++, C#, Java, |
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* JavaScript, Perl, TCL, and many others. These properties make JSON an |
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* ideal data-interchange language. |
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* |
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* This package provides a simple encoder and decoder for JSON notation. It |
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* is intended for use with client-side Javascript applications that make |
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* use of HTTPRequest to perform server communication functions - data can |
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* be encoded into JSON notation for use in a client-side javascript, or |
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* decoded from incoming Javascript requests. JSON format is native to |
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* Javascript, and can be directly eval()'ed with no further parsing |
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* overhead |
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* |
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* All strings should be in ASCII or UTF-8 format! |
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* |
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* LICENSE: Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: Redistributions of source code must retain the |
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* above copyright notice, this list of conditions and the following |
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* disclaimer. Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
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* NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* @category |
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* @package Services_JSON |
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* @author Michal Migurski <mike-json@teczno.com> |
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* @author Matt Knapp <mdknapp[at]gmail[dot]com> |
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* @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> |
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* @copyright 2005 Michal Migurski |
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* @version CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $ |
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* @license http://www.opensource.org/licenses/bsd-license.php |
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* @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 |
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*/ |
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|
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/** |
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* Marker constant for Services_JSON::decode(), used to flag stack state |
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*/ |
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define('SERVICES_JSON_SLICE', 1); |
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|
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/** |
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* Marker constant for Services_JSON::decode(), used to flag stack state |
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*/ |
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define('SERVICES_JSON_IN_STR', 2); |
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|
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/** |
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* Marker constant for Services_JSON::decode(), used to flag stack state |
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*/ |
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define('SERVICES_JSON_IN_ARR', 3); |
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|
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/** |
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* Marker constant for Services_JSON::decode(), used to flag stack state |
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*/ |
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define('SERVICES_JSON_IN_OBJ', 4); |
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|
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/** |
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* Marker constant for Services_JSON::decode(), used to flag stack state |
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*/ |
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define('SERVICES_JSON_IN_CMT', 5); |
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|
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/** |
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* Behavior switch for Services_JSON::decode() |
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*/ |
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define('SERVICES_JSON_LOOSE_TYPE', 16); |
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|
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/** |
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* Behavior switch for Services_JSON::decode() |
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*/ |
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define('SERVICES_JSON_SUPPRESS_ERRORS', 32); |
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|
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/** |
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* Converts to and from JSON format. |
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* |
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* Brief example of use: |
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* |
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* <code> |
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* // create a new instance of Services_JSON |
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* $json = new Services_JSON(); |
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* |
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* // convert a complexe value to JSON notation, and send it to the browser |
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* $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); |
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* $output = $json->encode($value); |
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* |
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* print($output); |
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* // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] |
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* |
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* // accept incoming POST data, assumed to be in JSON notation |
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* $input = file_get_contents('php://input', 1000000); |
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* $value = $json->decode($input); |
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* </code> |
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*/ |
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class Services_JSON |
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{ |
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/** |
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* constructs a new JSON instance |
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* |
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* @param int $use object behavior flags; combine with boolean-OR |
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* |
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* possible values: |
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* - SERVICES_JSON_LOOSE_TYPE: loose typing. |
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* "{...}" syntax creates associative arrays |
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* instead of objects in decode(). |
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* - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. |
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* Values which can't be encoded (e.g. resources) |
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* appear as NULL instead of throwing errors. |
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* By default, a deeply-nested resource will |
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* bubble up with an error, so all return values |
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* from encode() should be checked with isError() |
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*/ |
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function Services_JSON($use = 0) |
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{ |
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$this->use = $use; |
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} |
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|
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/** |
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* convert a string from one UTF-16 char to one UTF-8 char |
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* |
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* Normally should be handled by mb_convert_encoding, but |
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* provides a slower PHP-only method for installations |
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* that lack the multibye string extension. |
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* |
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* @param string $utf16 UTF-16 character |
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* @return string UTF-8 character |
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* @access private |
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*/ |
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function utf162utf8($utf16) |
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{ |
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// oh please oh please oh please oh please oh please |
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if(function_exists('mb_convert_encoding')) { |
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return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); |
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} |
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|
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$bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); |
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|
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switch(true) { |
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case ((0x7F & $bytes) == $bytes): |
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// this case should never be reached, because we are in ASCII range |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return chr(0x7F & $bytes); |
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|
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case (0x07FF & $bytes) == $bytes: |
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// return a 2-byte UTF-8 character |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return chr(0xC0 | (($bytes >> 6) & 0x1F)) |
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. chr(0x80 | ($bytes & 0x3F)); |
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|
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case (0xFFFF & $bytes) == $bytes: |
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// return a 3-byte UTF-8 character |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return chr(0xE0 | (($bytes >> 12) & 0x0F)) |
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. chr(0x80 | (($bytes >> 6) & 0x3F)) |
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. chr(0x80 | ($bytes & 0x3F)); |
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} |
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|
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// ignoring UTF-32 for now, sorry |
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return ''; |
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} |
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|
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/** |
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* convert a string from one UTF-8 char to one UTF-16 char |
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* |
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* Normally should be handled by mb_convert_encoding, but |
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* provides a slower PHP-only method for installations |
| 187 |
* that lack the multibye string extension. |
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* |
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* @param string $utf8 UTF-8 character |
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* @return string UTF-16 character |
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* @access private |
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*/ |
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function utf82utf16($utf8) |
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{ |
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// oh please oh please oh please oh please oh please |
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if(function_exists('mb_convert_encoding')) { |
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return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); |
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} |
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|
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switch(strlen($utf8)) { |
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case 1: |
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// this case should never be reached, because we are in ASCII range |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return $utf8; |
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|
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case 2: |
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// return a UTF-16 character from a 2-byte UTF-8 char |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return chr(0x07 & (ord($utf8{0}) >> 2)) |
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. chr((0xC0 & (ord($utf8{0}) << 6)) |
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| (0x3F & ord($utf8{1}))); |
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|
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case 3: |
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// return a UTF-16 character from a 3-byte UTF-8 char |
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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return chr((0xF0 & (ord($utf8{0}) << 4)) |
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| (0x0F & (ord($utf8{1}) >> 2))) |
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. chr((0xC0 & (ord($utf8{1}) << 6)) |
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| (0x7F & ord($utf8{2}))); |
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} |
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|
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// ignoring UTF-32 for now, sorry |
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return ''; |
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} |
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|
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/** |
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* encodes an arbitrary variable into JSON format |
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* |
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* @param mixed $var any number, boolean, string, array, or object to be encoded. |
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* see argument 1 to Services_JSON() above for array-parsing behavior. |
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* if var is a strng, note that encode() always expects it |
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* to be in ASCII or UTF-8 format! |
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* |
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* @return mixed JSON string representation of input var or an error if a problem occurs |
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* @access public |
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*/ |
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function encode($var) |
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{ |
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switch (gettype($var)) { |
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case 'boolean': |
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return $var ? 'true' : 'false'; |
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|
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case 'NULL': |
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return 'null'; |
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|
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case 'integer': |
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return (int) $var; |
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|
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case 'double': |
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case 'float': |
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return (float) $var; |
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|
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case 'string': |
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// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT |
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$ascii = ''; |
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$strlen_var = strlen($var); |
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|
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/* |
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* Iterate over every character in the string, |
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* escaping with a slash or encoding to UTF-8 where necessary |
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*/ |
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for ($c = 0; $c < $strlen_var; ++$c) { |
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|
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$ord_var_c = ord($var{$c}); |
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|
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switch (true) { |
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case $ord_var_c == 0x08: |
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$ascii .= '\b'; |
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break; |
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case $ord_var_c == 0x09: |
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$ascii .= '\t'; |
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break; |
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case $ord_var_c == 0x0A: |
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$ascii .= '\n'; |
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break; |
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case $ord_var_c == 0x0C: |
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$ascii .= '\f'; |
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break; |
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case $ord_var_c == 0x0D: |
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$ascii .= '\r'; |
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break; |
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|
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case $ord_var_c == 0x22: |
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case $ord_var_c == 0x2F: |
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case $ord_var_c == 0x5C: |
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// double quote, slash, slosh |
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$ascii .= '\\'.$var{$c}; |
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break; |
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|
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case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): |
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// characters U-00000000 - U-0000007F (same as ASCII) |
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$ascii .= $var{$c}; |
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break; |
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|
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case (($ord_var_c & 0xE0) == 0xC0): |
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// characters U-00000080 - U-000007FF, mask 110XXXXX |
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// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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$char = pack('C*', $ord_var_c, ord($var{$c + 1})); |
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$c += 1; |
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$utf16 = $this->utf82utf16($char); |
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$ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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break; |
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|
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case (($ord_var_c & 0xF0) == 0xE0): |
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// characters U-00000800 - U-0000FFFF, mask 1110XXXX |
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// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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$char = pack('C*', $ord_var_c, |
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ord($var{$c + 1}), |
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ord($var{$c + 2})); |
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$c += 2; |
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$utf16 = $this->utf82utf16($char); |
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$ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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break; |
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|
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case (($ord_var_c & 0xF8) == 0xF0): |
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// characters U-00010000 - U-001FFFFF, mask 11110XXX |
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// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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$char = pack('C*', $ord_var_c, |
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ord($var{$c + 1}), |
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ord($var{$c + 2}), |
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ord($var{$c + 3})); |
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$c += 3; |
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$utf16 = $this->utf82utf16($char); |
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$ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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break; |
| 326 |
|
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case (($ord_var_c & 0xFC) == 0xF8): |
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// characters U-00200000 - U-03FFFFFF, mask 111110XX |
| 329 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 330 |
$char = pack('C*', $ord_var_c, |
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ord($var{$c + 1}), |
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ord($var{$c + 2}), |
| 333 |
ord($var{$c + 3}), |
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ord($var{$c + 4})); |
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$c += 4; |
| 336 |
$utf16 = $this->utf82utf16($char); |
| 337 |
$ascii .= sprintf('\u%04s', bin2hex($utf16)); |
| 338 |
break; |
| 339 |
|
| 340 |
case (($ord_var_c & 0xFE) == 0xFC): |
| 341 |
// characters U-04000000 - U-7FFFFFFF, mask 1111110X |
| 342 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 343 |
$char = pack('C*', $ord_var_c, |
| 344 |
ord($var{$c + 1}), |
| 345 |
ord($var{$c + 2}), |
| 346 |
ord($var{$c + 3}), |
| 347 |
ord($var{$c + 4}), |
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ord($var{$c + 5})); |
| 349 |
$c += 5; |
| 350 |
$utf16 = $this->utf82utf16($char); |
| 351 |
$ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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break; |
| 353 |
} |
| 354 |
} |
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|
| 356 |
return '"'.$ascii.'"'; |
| 357 |
|
| 358 |
case 'array': |
| 359 |
/* |
| 360 |
* As per JSON spec if any array key is not an integer |
| 361 |
* we must treat the the whole array as an object. We |
| 362 |
* also try to catch a sparsely populated associative |
| 363 |
* array with numeric keys here because some JS engines |
| 364 |
* will create an array with empty indexes up to |
| 365 |
* max_index which can cause memory issues and because |
| 366 |
* the keys, which may be relevant, will be remapped |
| 367 |
* otherwise. |
| 368 |
* |
| 369 |
* As per the ECMA and JSON specification an object may |
| 370 |
* have any string as a property. Unfortunately due to |
| 371 |
* a hole in the ECMA specification if the key is a |
| 372 |
* ECMA reserved word or starts with a digit the |
| 373 |
* parameter is only accessible using ECMAScript's |
| 374 |
* bracket notation. |
| 375 |
*/ |
| 376 |
|
| 377 |
// treat as a JSON object |
| 378 |
if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { |
| 379 |
$properties = array_map(array($this, 'name_value'), |
| 380 |
array_keys($var), |
| 381 |
array_values($var)); |
| 382 |
|
| 383 |
foreach($properties as $property) { |
| 384 |
if(Services_JSON::isError($property)) { |
| 385 |
return $property; |
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
return '{' . join(',', $properties) . '}'; |
| 390 |
} |
| 391 |
|
| 392 |
// treat it like a regular array |
| 393 |
$elements = array_map(array($this, 'encode'), $var); |
| 394 |
|
| 395 |
foreach($elements as $element) { |
| 396 |
if(Services_JSON::isError($element)) { |
| 397 |
return $element; |
| 398 |
} |
| 399 |
} |
| 400 |
|
| 401 |
return '[' . join(',', $elements) . ']'; |
| 402 |
|
| 403 |
case 'object': |
| 404 |
$vars = get_object_vars($var); |
| 405 |
|
| 406 |
$properties = array_map(array($this, 'name_value'), |
| 407 |
array_keys($vars), |
| 408 |
array_values($vars)); |
| 409 |
|
| 410 |
foreach($properties as $property) { |
| 411 |
if(Services_JSON::isError($property)) { |
| 412 |
return $property; |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
return '{' . join(',', $properties) . '}'; |
| 417 |
|
| 418 |
default: |
| 419 |
return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) |
| 420 |
? 'null' |
| 421 |
: new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); |
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
/** |
| 426 |
* array-walking function for use in generating JSON-formatted name-value pairs |
| 427 |
* |
| 428 |
* @param string $name name of key to use |
| 429 |
* @param mixed $value reference to an array element to be encoded |
| 430 |
* |
| 431 |
* @return string JSON-formatted name-value pair, like '"name":value' |
| 432 |
* @access private |
| 433 |
*/ |
| 434 |
function name_value($name, $value) |
| 435 |
{ |
| 436 |
$encoded_value = $this->encode($value); |
| 437 |
|
| 438 |
if(Services_JSON::isError($encoded_value)) { |
| 439 |
return $encoded_value; |
| 440 |
} |
| 441 |
|
| 442 |
return $this->encode(strval($name)) . ':' . $encoded_value; |
| 443 |
} |
| 444 |
|
| 445 |
/** |
| 446 |
* reduce a string by removing leading and trailing comments and whitespace |
| 447 |
* |
| 448 |
* @param $str string string value to strip of comments and whitespace |
| 449 |
* |
| 450 |
* @return string string value stripped of comments and whitespace |
| 451 |
* @access private |
| 452 |
*/ |
| 453 |
function reduce_string($str) |
| 454 |
{ |
| 455 |
$str = preg_replace(array( |
| 456 |
|
| 457 |
// eliminate single line comments in '// ...' form |
| 458 |
'#^\s*//(.+)$#m', |
| 459 |
|
| 460 |
// eliminate multi-line comments in '/* ... */' form, at start of string |
| 461 |
'#^\s*/\*(.+)\*/#Us', |
| 462 |
|
| 463 |
// eliminate multi-line comments in '/* ... */' form, at end of string |
| 464 |
'#/\*(.+)\*/\s*$#Us' |
| 465 |
|
| 466 |
), '', $str); |
| 467 |
|
| 468 |
// eliminate extraneous space |
| 469 |
return trim($str); |
| 470 |
} |
| 471 |
|
| 472 |
/** |
| 473 |
* decodes a JSON string into appropriate variable |
| 474 |
* |
| 475 |
* @param string $str JSON-formatted string |
| 476 |
* |
| 477 |
* @return mixed number, boolean, string, array, or object |
| 478 |
* corresponding to given JSON input string. |
| 479 |
* See argument 1 to Services_JSON() above for object-output behavior. |
| 480 |
* Note that decode() always returns strings |
| 481 |
* in ASCII or UTF-8 format! |
| 482 |
* @access public |
| 483 |
*/ |
| 484 |
function decode($str) |
| 485 |
{ |
| 486 |
$str = $this->reduce_string($str); |
| 487 |
|
| 488 |
switch (strtolower($str)) { |
| 489 |
case 'true': |
| 490 |
return true; |
| 491 |
|
| 492 |
case 'false': |
| 493 |
return false; |
| 494 |
|
| 495 |
case 'null': |
| 496 |
return null; |
| 497 |
|
| 498 |
default: |
| 499 |
$m = array(); |
| 500 |
|
| 501 |
if (is_numeric($str)) { |
| 502 |
// Lookie-loo, it's a number |
| 503 |
|
| 504 |
// This would work on its own, but I'm trying to be |
| 505 |
// good about returning integers where appropriate: |
| 506 |
// return (float)$str; |
| 507 |
|
| 508 |
// Return float or int, as appropriate |
| 509 |
return ((float)$str == (integer)$str) |
| 510 |
? (integer)$str |
| 511 |
: (float)$str; |
| 512 |
|
| 513 |
} elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { |
| 514 |
// STRINGS RETURNED IN UTF-8 FORMAT |
| 515 |
$delim = substr($str, 0, 1); |
| 516 |
$chrs = substr($str, 1, -1); |
| 517 |
$utf8 = ''; |
| 518 |
$strlen_chrs = strlen($chrs); |
| 519 |
|
| 520 |
for ($c = 0; $c < $strlen_chrs; ++$c) { |
| 521 |
|
| 522 |
$substr_chrs_c_2 = substr($chrs, $c, 2); |
| 523 |
$ord_chrs_c = ord($chrs{$c}); |
| 524 |
|
| 525 |
switch (true) { |
| 526 |
case $substr_chrs_c_2 == '\b': |
| 527 |
$utf8 .= chr(0x08); |
| 528 |
++$c; |
| 529 |
break; |
| 530 |
case $substr_chrs_c_2 == '\t': |
| 531 |
$utf8 .= chr(0x09); |
| 532 |
++$c; |
| 533 |
break; |
| 534 |
case $substr_chrs_c_2 == '\n': |
| 535 |
$utf8 .= chr(0x0A); |
| 536 |
++$c; |
| 537 |
break; |
| 538 |
case $substr_chrs_c_2 == '\f': |
| 539 |
$utf8 .= chr(0x0C); |
| 540 |
++$c; |
| 541 |
break; |
| 542 |
case $substr_chrs_c_2 == '\r': |
| 543 |
$utf8 .= chr(0x0D); |
| 544 |
++$c; |
| 545 |
break; |
| 546 |
|
| 547 |
case $substr_chrs_c_2 == '\\"': |
| 548 |
case $substr_chrs_c_2 == '\\\'': |
| 549 |
case $substr_chrs_c_2 == '\\\\': |
| 550 |
case $substr_chrs_c_2 == '\\/': |
| 551 |
if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || |
| 552 |
($delim == "'" && $substr_chrs_c_2 != '\\"')) { |
| 553 |
$utf8 .= $chrs{++$c}; |
| 554 |
} |
| 555 |
break; |
| 556 |
|
| 557 |
case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): |
| 558 |
// single, escaped unicode character |
| 559 |
$utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) |
| 560 |
. chr(hexdec(substr($chrs, ($c + 4), 2))); |
| 561 |
$utf8 .= $this->utf162utf8($utf16); |
| 562 |
$c += 5; |
| 563 |
break; |
| 564 |
|
| 565 |
case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): |
| 566 |
$utf8 .= $chrs{$c}; |
| 567 |
break; |
| 568 |
|
| 569 |
case ($ord_chrs_c & 0xE0) == 0xC0: |
| 570 |
// characters U-00000080 - U-000007FF, mask 110XXXXX |
| 571 |
//see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 572 |
$utf8 .= substr($chrs, $c, 2); |
| 573 |
++$c; |
| 574 |
break; |
| 575 |
|
| 576 |
case ($ord_chrs_c & 0xF0) == 0xE0: |
| 577 |
// characters U-00000800 - U-0000FFFF, mask 1110XXXX |
| 578 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 579 |
$utf8 .= substr($chrs, $c, 3); |
| 580 |
$c += 2; |
| 581 |
break; |
| 582 |
|
| 583 |
case ($ord_chrs_c & 0xF8) == 0xF0: |
| 584 |
// characters U-00010000 - U-001FFFFF, mask 11110XXX |
| 585 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 586 |
$utf8 .= substr($chrs, $c, 4); |
| 587 |
$c += 3; |
| 588 |
break; |
| 589 |
|
| 590 |
case ($ord_chrs_c & 0xFC) == 0xF8: |
| 591 |
// characters U-00200000 - U-03FFFFFF, mask 111110XX |
| 592 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 593 |
$utf8 .= substr($chrs, $c, 5); |
| 594 |
$c += 4; |
| 595 |
break; |
| 596 |
|
| 597 |
case ($ord_chrs_c & 0xFE) == 0xFC: |
| 598 |
// characters U-04000000 - U-7FFFFFFF, mask 1111110X |
| 599 |
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 600 |
$utf8 .= substr($chrs, $c, 6); |
| 601 |
$c += 5; |
| 602 |
break; |
| 603 |
|
| 604 |
} |
| 605 |
|
| 606 |
} |
| 607 |
|
| 608 |
return $utf8; |
| 609 |
|
| 610 |
} elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { |
| 611 |
// array, or object notation |
| 612 |
|
| 613 |
if ($str{0} == '[') { |
| 614 |
$stk = array(SERVICES_JSON_IN_ARR); |
| 615 |
$arr = array(); |
| 616 |
} else { |
| 617 |
if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
| 618 |
$stk = array(SERVICES_JSON_IN_OBJ); |
| 619 |
$obj = array(); |
| 620 |
} else { |
| 621 |
$stk = array(SERVICES_JSON_IN_OBJ); |
| 622 |
$obj = new stdClass(); |
| 623 |
} |
| 624 |
} |
| 625 |
|
| 626 |
array_push($stk, array('what' => SERVICES_JSON_SLICE, |
| 627 |
'where' => 0, |
| 628 |
'delim' => false)); |
| 629 |
|
| 630 |
$chrs = substr($str, 1, -1); |
| 631 |
$chrs = $this->reduce_string($chrs); |
| 632 |
|
| 633 |
if ($chrs == '') { |
| 634 |
if (reset($stk) == SERVICES_JSON_IN_ARR) { |
| 635 |
return $arr; |
| 636 |
|
| 637 |
} else { |
| 638 |
return $obj; |
| 639 |
|
| 640 |
} |
| 641 |
} |
| 642 |
|
| 643 |
//print("\nparsing {$chrs}\n"); |
| 644 |
|
| 645 |
$strlen_chrs = strlen($chrs); |
| 646 |
|
| 647 |
for ($c = 0; $c <= $strlen_chrs; ++$c) { |
| 648 |
|
| 649 |
$top = end($stk); |
| 650 |
$substr_chrs_c_2 = substr($chrs, $c, 2); |
| 651 |
|
| 652 |
if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { |
| 653 |
// found a comma that is not inside a string, array, etc., |
| 654 |
// OR we've reached the end of the character list |
| 655 |
$slice = substr($chrs, $top['where'], ($c - $top['where'])); |
| 656 |
array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); |
| 657 |
//print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
| 658 |
|
| 659 |
if (reset($stk) == SERVICES_JSON_IN_ARR) { |
| 660 |
// we are in an array, so just push an element onto the stack |
| 661 |
array_push($arr, $this->decode($slice)); |
| 662 |
|
| 663 |
} elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
| 664 |
// we are in an object, so figure |
| 665 |
// out the property name and set an |
| 666 |
// element in an associative array, |
| 667 |
// for now |
| 668 |
$parts = array(); |
| 669 |
|
| 670 |
if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
| 671 |
// "name":value pair |
| 672 |
$key = $this->decode($parts[1]); |
| 673 |
$val = $this->decode($parts[2]); |
| 674 |
|
| 675 |
if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
| 676 |
$obj[$key] = $val; |
| 677 |
} else { |
| 678 |
$obj->$key = $val; |
| 679 |
} |
| 680 |
} elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
| 681 |
// name:value pair, where name is unquoted |
| 682 |
$key = $parts[1]; |
| 683 |
$val = $this->decode($parts[2]); |
| 684 |
|
| 685 |
if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
| 686 |
$obj[$key] = $val; |
| 687 |
} else { |
| 688 |
$obj->$key = $val; |
| 689 |
} |
| 690 |
} |
| 691 |
|
| 692 |
} |
| 693 |
|
| 694 |
} elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { |
| 695 |
// found a quote, and we are not inside a string |
| 696 |
array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); |
| 697 |
//print("Found start of string at {$c}\n"); |
| 698 |
|
| 699 |
} elseif (($chrs{$c} == $top['delim']) && |
| 700 |
($top['what'] == SERVICES_JSON_IN_STR) && |
| 701 |
((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) { |
| 702 |
// found a quote, we're in a string, and it's not escaped |
| 703 |
// we know that it's not escaped becase there is _not_ an |
| 704 |
// odd number of backslashes at the end of the string so far |
| 705 |
array_pop($stk); |
| 706 |
//print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); |
| 707 |
|
| 708 |
} elseif (($chrs{$c} == '[') && |
| 709 |
in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 710 |
// found a left-bracket, and we are in an array, object, or slice |
| 711 |
array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); |
| 712 |
//print("Found start of array at {$c}\n"); |
| 713 |
|
| 714 |
} elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { |
| 715 |
// found a right-bracket, and we're in an array |
| 716 |
array_pop($stk); |
| 717 |
//print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
| 718 |
|
| 719 |
} elseif (($chrs{$c} == '{') && |
| 720 |
in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 721 |
// found a left-brace, and we are in an array, object, or slice |
| 722 |
array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); |
| 723 |
//print("Found start of object at {$c}\n"); |
| 724 |
|
| 725 |
} elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { |
| 726 |
// found a right-brace, and we're in an object |
| 727 |
array_pop($stk); |
| 728 |
//print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
| 729 |
|
| 730 |
} elseif (($substr_chrs_c_2 == '/*') && |
| 731 |
in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 732 |
// found a comment start, and we are in an array, object, or slice |
| 733 |
array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); |
| 734 |
$c++; |
| 735 |
//print("Found start of comment at {$c}\n"); |
| 736 |
|
| 737 |
} elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { |
| 738 |
// found a comment end, and we're in one now |
| 739 |
array_pop($stk); |
| 740 |
$c++; |
| 741 |
|
| 742 |
for ($i = $top['where']; $i <= $c; ++$i) |
| 743 |
$chrs = substr_replace($chrs, ' ', $i, 1); |
| 744 |
|
| 745 |
//print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
| 746 |
|
| 747 |
} |
| 748 |
|
| 749 |
} |
| 750 |
|
| 751 |
if (reset($stk) == SERVICES_JSON_IN_ARR) { |
| 752 |
return $arr; |
| 753 |
|
| 754 |
} elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
| 755 |
return $obj; |
| 756 |
|
| 757 |
} |
| 758 |
|
| 759 |
} |
| 760 |
} |
| 761 |
} |
| 762 |
|
| 763 |
/** |
| 764 |
* @todo Ultimately, this should just call PEAR::isError() |
| 765 |
*/ |
| 766 |
function isError($data, $code = null) |
| 767 |
{ |
| 768 |
if (class_exists('pear')) { |
| 769 |
return PEAR::isError($data, $code); |
| 770 |
} elseif (is_object($data) && (get_class($data) == 'services_json_error' || |
| 771 |
is_subclass_of($data, 'services_json_error'))) { |
| 772 |
return true; |
| 773 |
} |
| 774 |
|
| 775 |
return false; |
| 776 |
} |
| 777 |
} |
| 778 |
|
| 779 |
if (class_exists('PEAR_Error')) { |
| 780 |
|
| 781 |
class Services_JSON_Error extends PEAR_Error |
| 782 |
{ |
| 783 |
function Services_JSON_Error($message = 'unknown error', $code = null, |
| 784 |
$mode = null, $options = null, $userinfo = null) |
| 785 |
{ |
| 786 |
parent::PEAR_Error($message, $code, $mode, $options, $userinfo); |
| 787 |
} |
| 788 |
} |
| 789 |
|
| 790 |
} else { |
| 791 |
|
| 792 |
/** |
| 793 |
* @todo Ultimately, this class shall be descended from PEAR_Error |
| 794 |
*/ |
| 795 |
class Services_JSON_Error |
| 796 |
{ |
| 797 |
function Services_JSON_Error($message = 'unknown error', $code = null, |
| 798 |
$mode = null, $options = null, $userinfo = null) |
| 799 |
{ |
| 800 |
|
| 801 |
} |
| 802 |
} |
| 803 |
|
| 804 |
} |
| 805 |
|
| 806 |
?> |
| 807 |
|
