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<?php
/**
* $Id: JSON.php 40 2007-06-18 11:43:15Z spocke $
*
* @package MCManager.utils
* @author Moxiecode
* @copyright Copyright © 2007, Moxiecode Systems AB, All rights reserved.
*/
define('JSON_BOOL', 1);
define('JSON_INT', 2);
define('JSON_STR', 3);
define('JSON_FLOAT', 4);
define('JSON_NULL', 5);
define('JSON_START_OBJ', 6);
define('JSON_END_OBJ', 7);
define('JSON_START_ARRAY', 8);
define('JSON_END_ARRAY', 9);
define('JSON_KEY', 10);
define('JSON_SKIP', 11);
define('JSON_IN_ARRAY', 30);
define('JSON_IN_OBJECT', 40);
define('JSON_IN_BETWEEN', 50);
class Moxiecode_JSONReader {
var $_data, $_len, $_pos;
var $_value, $_token;
var $_location, $_lastLocations;
var $_needProp;
function Moxiecode_JSONReader($data) {
$this->_data = $data;
$this->_len = strlen($data);
$this->_pos = -1;
$this->_location = JSON_IN_BETWEEN;
$this->_lastLocations = array();
$this->_needProp = false;
}
function getToken() {
return $this->_token;
}
function getLocation() {
return $this->_location;
}
function getTokenName() {
switch ($this->_token) {
case JSON_BOOL:
return 'JSON_BOOL';
case JSON_INT:
return 'JSON_INT';
case JSON_STR:
return 'JSON_STR';
case JSON_FLOAT:
return 'JSON_FLOAT';
case JSON_NULL:
return 'JSON_NULL';
case JSON_START_OBJ:
return 'JSON_START_OBJ';
case JSON_END_OBJ:
return 'JSON_END_OBJ';
case JSON_START_ARRAY:
return 'JSON_START_ARRAY';
case JSON_END_ARRAY:
return 'JSON_END_ARRAY';
case JSON_KEY:
return 'JSON_KEY';
}
return 'UNKNOWN';
}
function getValue() {
return $this->_value;
}
function readToken() {
$chr = $this->read();
if ($chr != null) {
switch ($chr) {
case '[':
$this->_lastLocation[] = $this->_location;
$this->_location = JSON_IN_ARRAY;
$this->_token = JSON_START_ARRAY;
$this->_value = null;
$this->readAway();
return true;
case ']':
$this->_location = array_pop($this->_lastLocation);
$this->_token = JSON_END_ARRAY;
$this->_value = null;
$this->readAway();
if ($this->_location == JSON_IN_OBJECT)
$this->_needProp = true;
return true;
case '{':
$this->_lastLocation[] = $this->_location;
$this->_location = JSON_IN_OBJECT;
$this->_needProp = true;
$this->_token = JSON_START_OBJ;
$this->_value = null;
$this->readAway();
return true;
case '}':
$this->_location = array_pop($this->_lastLocation);
$this->_token = JSON_END_OBJ;
$this->_value = null;
$this->readAway();
if ($this->_location == JSON_IN_OBJECT)
$this->_needProp = true;
return true;
// String
case '"':
case '\'':
return $this->_readString($chr);
// Null
case 'n':
return $this->_readNull();
// Bool
case 't':
case 'f':
return $this->_readBool($chr);
default:
// Is number
if (is_numeric($chr) || $chr == '-' || $chr == '.')
return $this->_readNumber($chr);
return true;
}
}
return false;
}
function _readBool($chr) {
$this->_token = JSON_BOOL;
$this->_value = $chr == 't';
if ($chr == 't')
$this->skip(3); // rue
else
$this->skip(4); // alse
$this->readAway();
if ($this->_location == JSON_IN_OBJECT && !$this->_needProp)
$this->_needProp = true;
return true;
}
function _readNull() {
$this->_token = JSON_NULL;
$this->_value = null;
$this->skip(3); // ull
$this->readAway();
if ($this->_location == JSON_IN_OBJECT && !$this->_needProp)
$this->_needProp = true;
return true;
}
function _readString($quote) {
$output = "";
$this->_token = JSON_STR;
$endString = false;
while (($chr = $this->peek()) != -1) {
switch ($chr) {
case '\\':
// Read away slash
$this->read();
// Read escape code
$chr = $this->read();
switch ($chr) {
case 't':
$output .= "\t";
break;
case 'b':
$output .= "\b";
break;
case 'f':
$output .= "\f";
break;
case 'r':
$output .= "\r";
break;
case 'n':
$output .= "\n";
break;
case 'u':
$output .= $this->_int2utf8(hexdec($this->read(4)));
break;
default:
$output .= $chr;
break;
}
break;
case '\'':
case '"':
if ($chr == $quote)
$endString = true;
$chr = $this->read();
if ($chr != -1 && $chr != $quote)
$output .= $chr;
break;
default:
$output .= $this->read();
}
// String terminated
if ($endString)
break;
}
$this->readAway();
$this->_value = $output;
// Needed a property
if ($this->_needProp) {
$this->_token = JSON_KEY;
$this->_needProp = false;
return true;
}
if ($this->_location == JSON_IN_OBJECT && !$this->_needProp)
$this->_needProp = true;
return true;
}
function _int2utf8($int) {
$int = intval($int);
switch ($int) {
case 0:
return chr(0);
case ($int & 0x7F):
return chr($int);
case ($int & 0x7FF):
return chr(0xC0 | (($int >> 6) & 0x1F)) . chr(0x80 | ($int & 0x3F));
case ($int & 0xFFFF):
return chr(0xE0 | (($int >> 12) & 0x0F)) . chr(0x80 | (($int >> 6) & 0x3F)) . chr (0x80 | ($int & 0x3F));
case ($int & 0x1FFFFF):
return chr(0xF0 | ($int >> 18)) . chr(0x80 | (($int >> 12) & 0x3F)) . chr(0x80 | (($int >> 6) & 0x3F)) . chr(0x80 | ($int & 0x3F));
}
}
function _readNumber($start) {
$value = "";
$isFloat = false;
$this->_token = JSON_INT;
$value .= $start;
while (($chr = $this->peek()) != -1) {
if (is_numeric($chr) || $chr == '-' || $chr == '.') {
if ($chr == '.')
$isFloat = true;
$value .= $this->read();
} else
break;
}
$this->readAway();
if ($isFloat) {
$this->_token = JSON_FLOAT;
$this->_value = floatval($value);
} else
$this->_value = intval($value);
if ($this->_location == JSON_IN_OBJECT && !$this->_needProp)
$this->_needProp = true;
return true;
}
function readAway() {
while (($chr = $this->peek()) != null) {
if ($chr != ':' && $chr != ',' && $chr != ' ')
return;
$this->read();
}
}
function read($len = 1) {
if ($this->_pos < $this->_len) {
if ($len > 1) {
$str = substr($this->_data, $this->_pos + 1, $len);
$this->_pos += $len;
return $str;
} else
return $this->_data[++$this->_pos];
}
return null;
}
function skip($len) {
$this->_pos += $len;
}
function peek() {
if ($this->_pos < $this->_len)
return $this->_data[$this->_pos + 1];
return null;
}
}
/**
* This class handles JSON stuff.
*
* @package MCManager.utils
*/
class Moxiecode_JSON {
function Moxiecode_JSON() {
}
function decode($input) {
$reader = new Moxiecode_JSONReader($input);
return $this->readValue($reader);
}
function readValue(&$reader) {
$this->data = array();
$this->parents = array();
$this->cur =& $this->data;
$key = null;
$loc = JSON_IN_ARRAY;
while ($reader->readToken()) {
switch ($reader->getToken()) {
case JSON_STR:
case JSON_INT:
case JSON_BOOL:
case JSON_FLOAT:
case JSON_NULL:
switch ($reader->getLocation()) {
case JSON_IN_OBJECT:
$this->cur[$key] = $reader->getValue();
break;
case JSON_IN_ARRAY:
$this->cur[] = $reader->getValue();
break;
default:
return $reader->getValue();
}
break;
case JSON_KEY:
$key = $reader->getValue();
break;
case JSON_START_OBJ:
case JSON_START_ARRAY:
if ($loc == JSON_IN_OBJECT)
$this->addArray($key);
else
$this->addArray(null);
$cur =& $obj;
$loc = $reader->getLocation();
break;
case JSON_END_OBJ:
case JSON_END_ARRAY:
$loc = $reader->getLocation();
if (count($this->parents) > 0) {
$this->cur =& $this->parents[count($this->parents) - 1];
array_pop($this->parents);
}
break;
}
}
return $this->data[0];
}
// This method was needed since PHP is crapy and doesn't have pointers/references
function addArray($key) {
$this->parents[] =& $this->cur;
$ar = array();
if ($key)
$this->cur[$key] =& $ar;
else
$this->cur[] =& $ar;
$this->cur =& $ar;
}
function getDelim($index, &$reader) {
switch ($reader->getLocation()) {
case JSON_IN_ARRAY:
case JSON_IN_OBJECT:
if ($index > 0)
return ",";
break;
}
return "";
}
function encode($input) {
switch (gettype($input)) {
case 'boolean':
return $input ? 'true' : 'false';
case 'integer':
return (int) $input;
case 'float':
case 'double':
return (float) $input;
case 'NULL':
return 'null';
case 'string':
return $this->encodeString($input);
case 'array':
return $this->_encodeArray($input);
case 'object':
return $this->_encodeArray(get_object_vars($input));
}
return '';
}
function encodeString($input) {
// Needs to be escaped
if (preg_match('/[^a-zA-Z0-9]/', $input)) {
$output = '';
for ($i=0; $i<strlen($input); $i++) {
switch ($input[$i]) {
case "\b":
$output .= "\\b";
break;
case "\t":
$output .= "\\t";
break;
case "\f":
$output .= "\\f";
break;
case "\r":
$output .= "\\r";
break;
case "\n":
$output .= "\\n";
break;
case '\\':
$output .= "\\\\";
break;
case '\'':
$output .= "\\'";
break;
case '"':
$output .= '\"';
break;
default:
$byte = ord($input[$i]);
if (($byte & 0xE0) == 0xC0) {
$char = pack('C*', $byte, ord($input[$i + 1]));
$i += 1;
$output .= sprintf('\u%04s', bin2hex($this->_utf82utf16($char)));
} if (($byte & 0xF0) == 0xE0) {
$char = pack('C*', $byte, ord($input[$i + 1]), ord($input[$i + 2]));
$i += 2;
$output .= sprintf('\u%04s', bin2hex($this->_utf82utf16($char)));
} if (($byte & 0xF8) == 0xF0) {
$char = pack('C*', $byte, ord($input[$i + 1]), ord($input[$i + 2], ord($input[$i + 3])));
$i += 3;
$output .= sprintf('\u%04s', bin2hex($this->_utf82utf16($char)));
} if (($byte & 0xFC) == 0xF8) {
$char = pack('C*', $byte, ord($input[$i + 1]), ord($input[$i + 2], ord($input[$i + 3]), ord($input[$i + 4])));
$i += 4;
$output .= sprintf('\u%04s', bin2hex($this->_utf82utf16($char)));
} if (($byte & 0xFE) == 0xFC) {
$char = pack('C*', $byte, ord($input[$i + 1]), ord($input[$i + 2], ord($input[$i + 3]), ord($input[$i + 4]), ord($input[$i + 5])));
$i += 5;
$output .= sprintf('\u%04s', bin2hex($this->_utf82utf16($char)));
} else if ($byte < 128)
$output .= $input[$i];
}
}
return '"' . $output . '"';
}
return '"' . $input . '"';
}
function _utf82utf16($utf8) {
if (function_exists('mb_convert_encoding'))
return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
switch (strlen($utf8)) {
case 1:
return $utf8;
case 2:
return chr(0x07 & (ord($utf8[0]) >> 2)) . chr((0xC0 & (ord($utf8[0]) << 6)) | (0x3F & ord($utf8[1])));
case 3:
return chr((0xF0 & (ord($utf8[0]) << 4)) | (0x0F & (ord($utf8[1]) >> 2))) . chr((0xC0 & (ord($utf8[1]) << 6)) | (0x7F & ord($utf8[2])));
}
return '';
}
function _encodeArray($input) {
$output = '';
$isIndexed = true;
$keys = array_keys($input);
for ($i=0; $i<count($keys); $i++) {
if (!is_int($keys[$i])) {
$output .= $this->encodeString($keys[$i]) . ':' . $this->encode($input[$keys[$i]]);
$isIndexed = false;
} else
$output .= $this->encode($input[$keys[$i]]);
if ($i != count($keys) - 1)
$output .= ',';
}
return $isIndexed ? '[' . $output . ']' : '{' . $output . '}';
}
}
?>
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