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| 1 <?php |
| 2 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
| 3 |
| 4 /** |
| 5 * Converts to and from JSON format. |
| 6 * |
| 7 * JSON (JavaScript Object Notation) is a lightweight data-interchange |
| 8 * format. It is easy for humans to read and write. It is easy for machines |
| 9 * to parse and generate. It is based on a subset of the JavaScript |
| 10 * Programming Language, Standard ECMA-262 3rd Edition - December 1999. |
| 11 * This feature can also be found in Python. JSON is a text format that is |
| 12 * completely language independent but uses conventions that are familiar |
| 13 * to programmers of the C-family of languages, including C, C++, C#, Java, |
| 14 * JavaScript, Perl, TCL, and many others. These properties make JSON an |
| 15 * ideal data-interchange language. |
| 16 * |
| 17 * This package provides a simple encoder and decoder for JSON notation. It |
| 18 * is intended for use with client-side Javascript applications that make |
| 19 * use of HTTPRequest to perform server communication functions - data can |
| 20 * be encoded into JSON notation for use in a client-side javascript, or |
| 21 * decoded from incoming Javascript requests. JSON format is native to |
| 22 * Javascript, and can be directly eval()'ed with no further parsing |
| 23 * overhead |
| 24 * |
| 25 * All strings should be in ASCII or UTF-8 format! |
| 26 * |
| 27 * LICENSE: Redistribution and use in source and binary forms, with or |
| 28 * without modification, are permitted provided that the following |
| 29 * conditions are met: Redistributions of source code must retain the |
| 30 * above copyright notice, this list of conditions and the following |
| 31 * disclaimer. Redistributions in binary form must reproduce the above |
| 32 * copyright notice, this list of conditions and the following disclaimer |
| 33 * in the documentation and/or other materials provided with the |
| 34 * distribution. |
| 35 * |
| 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 38 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 39 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 41 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 42 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| 44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| 45 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| 46 * DAMAGE. |
| 47 * |
| 48 * @category |
| 49 * @package Services_JSON |
| 50 * @author Michal Migurski <mike-json@teczno.com> |
| 51 * @author Matt Knapp <mdknapp[at]gmail[dot]com> |
| 52 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> |
| 53 * @copyright 2005 Michal Migurski |
| 54 * @version CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $ |
| 55 * @license http://www.opensource.org/licenses/bsd-license.php |
| 56 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 |
| 57 */ |
| 58 |
| 59 /** |
| 60 * Marker constant for Services_JSON::decode(), used to flag stack state |
| 61 */ |
| 62 define('SERVICES_JSON_SLICE', 1); |
| 63 |
| 64 /** |
| 65 * Marker constant for Services_JSON::decode(), used to flag stack state |
| 66 */ |
| 67 define('SERVICES_JSON_IN_STR', 2); |
| 68 |
| 69 /** |
| 70 * Marker constant for Services_JSON::decode(), used to flag stack state |
| 71 */ |
| 72 define('SERVICES_JSON_IN_ARR', 3); |
| 73 |
| 74 /** |
| 75 * Marker constant for Services_JSON::decode(), used to flag stack state |
| 76 */ |
| 77 define('SERVICES_JSON_IN_OBJ', 4); |
| 78 |
| 79 /** |
| 80 * Marker constant for Services_JSON::decode(), used to flag stack state |
| 81 */ |
| 82 define('SERVICES_JSON_IN_CMT', 5); |
| 83 |
| 84 /** |
| 85 * Behavior switch for Services_JSON::decode() |
| 86 */ |
| 87 define('SERVICES_JSON_LOOSE_TYPE', 16); |
| 88 |
| 89 /** |
| 90 * Behavior switch for Services_JSON::decode() |
| 91 */ |
| 92 define('SERVICES_JSON_SUPPRESS_ERRORS', 32); |
| 93 |
| 94 /** |
| 95 * Converts to and from JSON format. |
| 96 * |
| 97 * Brief example of use: |
| 98 * |
| 99 * <code> |
| 100 * // create a new instance of Services_JSON |
| 101 * $json = new Services_JSON(); |
| 102 * |
| 103 * // convert a complexe value to JSON notation, and send it to the browser |
| 104 * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); |
| 105 * $output = $json->encode($value); |
| 106 * |
| 107 * print($output); |
| 108 * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] |
| 109 * |
| 110 * // accept incoming POST data, assumed to be in JSON notation |
| 111 * $input = file_get_contents('php://input', 1000000); |
| 112 * $value = $json->decode($input); |
| 113 * </code> |
| 114 */ |
| 115 class Services_JSON |
| 116 { |
| 117 /** |
| 118 * constructs a new JSON instance |
| 119 * |
| 120 * @param int $use object behavior flags; combine with boolean-OR |
| 121 * |
| 122 * possible values: |
| 123 * - SERVICES_JSON_LOOSE_TYPE: loose typing. |
| 124 * "{...}" syntax creates associative array
s |
| 125 * instead of objects in decode(). |
| 126 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppress
ion. |
| 127 * Values which can't be encoded (e.g. reso
urces) |
| 128 * appear as NULL instead of throwing error
s. |
| 129 * By default, a deeply-nested resource wil
l |
| 130 * bubble up with an error, so all return v
alues |
| 131 * from encode() should be checked with isE
rror() |
| 132 */ |
| 133 function Services_JSON($use = 0) |
| 134 { |
| 135 $this->use = $use; |
| 136 } |
| 137 |
| 138 /** |
| 139 * convert a string from one UTF-16 char to one UTF-8 char |
| 140 * |
| 141 * Normally should be handled by mb_convert_encoding, but |
| 142 * provides a slower PHP-only method for installations |
| 143 * that lack the multibye string extension. |
| 144 * |
| 145 * @param string $utf16 UTF-16 character |
| 146 * @return string UTF-8 character |
| 147 * @access private |
| 148 */ |
| 149 function utf162utf8($utf16) |
| 150 { |
| 151 // oh please oh please oh please oh please oh please |
| 152 if(function_exists('mb_convert_encoding')) { |
| 153 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); |
| 154 } |
| 155 |
| 156 $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); |
| 157 |
| 158 switch(true) { |
| 159 case ((0x7F & $bytes) == $bytes): |
| 160 // this case should never be reached, because we are in ASCII ra
nge |
| 161 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 162 return chr(0x7F & $bytes); |
| 163 |
| 164 case (0x07FF & $bytes) == $bytes: |
| 165 // return a 2-byte UTF-8 character |
| 166 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 167 return chr(0xC0 | (($bytes >> 6) & 0x1F)) |
| 168 . chr(0x80 | ($bytes & 0x3F)); |
| 169 |
| 170 case (0xFFFF & $bytes) == $bytes: |
| 171 // return a 3-byte UTF-8 character |
| 172 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 173 return chr(0xE0 | (($bytes >> 12) & 0x0F)) |
| 174 . chr(0x80 | (($bytes >> 6) & 0x3F)) |
| 175 . chr(0x80 | ($bytes & 0x3F)); |
| 176 } |
| 177 |
| 178 // ignoring UTF-32 for now, sorry |
| 179 return ''; |
| 180 } |
| 181 |
| 182 /** |
| 183 * convert a string from one UTF-8 char to one UTF-16 char |
| 184 * |
| 185 * Normally should be handled by mb_convert_encoding, but |
| 186 * provides a slower PHP-only method for installations |
| 187 * that lack the multibye string extension. |
| 188 * |
| 189 * @param string $utf8 UTF-8 character |
| 190 * @return string UTF-16 character |
| 191 * @access private |
| 192 */ |
| 193 function utf82utf16($utf8) |
| 194 { |
| 195 // oh please oh please oh please oh please oh please |
| 196 if(function_exists('mb_convert_encoding')) { |
| 197 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); |
| 198 } |
| 199 |
| 200 switch(strlen($utf8)) { |
| 201 case 1: |
| 202 // this case should never be reached, because we are in ASCII ra
nge |
| 203 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 204 return $utf8; |
| 205 |
| 206 case 2: |
| 207 // return a UTF-16 character from a 2-byte UTF-8 char |
| 208 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 209 return chr(0x07 & (ord($utf8{0}) >> 2)) |
| 210 . chr((0xC0 & (ord($utf8{0}) << 6)) |
| 211 | (0x3F & ord($utf8{1}))); |
| 212 |
| 213 case 3: |
| 214 // return a UTF-16 character from a 3-byte UTF-8 char |
| 215 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
| 216 return chr((0xF0 & (ord($utf8{0}) << 4)) |
| 217 | (0x0F & (ord($utf8{1}) >> 2))) |
| 218 . chr((0xC0 & (ord($utf8{1}) << 6)) |
| 219 | (0x7F & ord($utf8{2}))); |
| 220 } |
| 221 |
| 222 // ignoring UTF-32 for now, sorry |
| 223 return ''; |
| 224 } |
| 225 |
| 226 /** |
| 227 * encodes an arbitrary variable into JSON format |
| 228 * |
| 229 * @param mixed $var any number, boolean, string, array, or object to
be encoded. |
| 230 * see argument 1 to Services_JSON() above for arra
y-parsing behavior. |
| 231 * if var is a strng, note that encode() always exp
ects it |
| 232 * to be in ASCII or UTF-8 format! |
| 233 * |
| 234 * @return mixed JSON string representation of input var or an error if a
problem occurs |
| 235 * @access public |
| 236 */ |
| 237 function encode($var) |
| 238 { |
| 239 switch (gettype($var)) { |
| 240 case 'boolean': |
| 241 return $var ? 'true' : 'false'; |
| 242 |
| 243 case 'NULL': |
| 244 return 'null'; |
| 245 |
| 246 case 'integer': |
| 247 return (int) $var; |
| 248 |
| 249 case 'double': |
| 250 case 'float': |
| 251 return (float) $var; |
| 252 |
| 253 case 'string': |
| 254 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT |
| 255 $ascii = ''; |
| 256 $strlen_var = strlen($var); |
| 257 |
| 258 /* |
| 259 * Iterate over every character in the string, |
| 260 * escaping with a slash or encoding to UTF-8 where necessary |
| 261 */ |
| 262 for ($c = 0; $c < $strlen_var; ++$c) { |
| 263 |
| 264 $ord_var_c = ord($var{$c}); |
| 265 |
| 266 switch (true) { |
| 267 case $ord_var_c == 0x08: |
| 268 $ascii .= '\b'; |
| 269 break; |
| 270 case $ord_var_c == 0x09: |
| 271 $ascii .= '\t'; |
| 272 break; |
| 273 case $ord_var_c == 0x0A: |
| 274 $ascii .= '\n'; |
| 275 break; |
| 276 case $ord_var_c == 0x0C: |
| 277 $ascii .= '\f'; |
| 278 break; |
| 279 case $ord_var_c == 0x0D: |
| 280 $ascii .= '\r'; |
| 281 break; |
| 282 |
| 283 case $ord_var_c == 0x22: |
| 284 case $ord_var_c == 0x2F: |
| 285 case $ord_var_c == 0x5C: |
| 286 // double quote, slash, slosh |
| 287 $ascii .= '\\'.$var{$c}; |
| 288 break; |
| 289 |
| 290 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): |
| 291 // characters U-00000000 - U-0000007F (same as ASCII
) |
| 292 $ascii .= $var{$c}; |
| 293 break; |
| 294 |
| 295 case (($ord_var_c & 0xE0) == 0xC0): |
| 296 // characters U-00000080 - U-000007FF, mask 110XXXXX |
| 297 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#u
tf-8 |
| 298 $char = pack('C*', $ord_var_c, ord($var{$c + 1})); |
| 299 $c += 1; |
| 300 $utf16 = $this->utf82utf16($char); |
| 301 $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
| 302 break; |
| 303 |
| 304 case (($ord_var_c & 0xF0) == 0xE0): |
| 305 // characters U-00000800 - U-0000FFFF, mask 1110XXXX |
| 306 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#u
tf-8 |
| 307 $char = pack('C*', $ord_var_c, |
| 308 ord($var{$c + 1}), |
| 309 ord($var{$c + 2})); |
| 310 $c += 2; |
| 311 $utf16 = $this->utf82utf16($char); |
| 312 $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
| 313 break; |
| 314 |
| 315 case (($ord_var_c & 0xF8) == 0xF0): |
| 316 // characters U-00010000 - U-001FFFFF, mask 11110XXX |
| 317 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#u
tf-8 |
| 318 $char = pack('C*', $ord_var_c, |
| 319 ord($var{$c + 1}), |
| 320 ord($var{$c + 2}), |
| 321 ord($var{$c + 3})); |
| 322 $c += 3; |
| 323 $utf16 = $this->utf82utf16($char); |
| 324 $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
| 325 break; |
| 326 |
| 327 case (($ord_var_c & 0xFC) == 0xF8): |
| 328 // characters U-00200000 - U-03FFFFFF, mask 111110XX |
| 329 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#u
tf-8 |
| 330 $char = pack('C*', $ord_var_c, |
| 331 ord($var{$c + 1}), |
| 332 ord($var{$c + 2}), |
| 333 ord($var{$c + 3}), |
| 334 ord($var{$c + 4})); |
| 335 $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#u
tf-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{$c + 4}), |
| 348 ord($var{$c + 5})); |
| 349 $c += 5; |
| 350 $utf16 = $this->utf82utf16($char); |
| 351 $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
| 352 break; |
| 353 } |
| 354 } |
| 355 |
| 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 pai
rs |
| 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 $str string string value to strip of comments and whites
pace |
| 449 * |
| 450 * @return string string value stripped of comments and whitespace |
| 451 * @access private |
| 452 */ |
| 453 function reduce_string($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 o
f 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 $str JSON-formatted string |
| 476 * |
| 477 * @return mixed number, boolean, string, array, or object |
| 478 * corresponding to given JSON input string. |
| 479 * See argument 1 to Services_JSON() above for object-outpu
t behavior. |
| 480 * Note that decode() always returns strings |
| 481 * in ASCII or UTF-8 format! |
| 482 * @access public |
| 483 */ |
| 484 function decode($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 110X
XXXX |
| 571 //see http://www.cl.cam.ac.uk/~mgk25/unicode.htm
l#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 1110
XXXX |
| 578 // see http://www.cl.cam.ac.uk/~mgk25/unicode.ht
ml#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 1111
0XXX |
| 585 // see http://www.cl.cam.ac.uk/~mgk25/unicode.ht
ml#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 1111
10XX |
| 592 // see http://www.cl.cam.ac.uk/~mgk25/unicode.ht
ml#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 1111
110X |
| 599 // see http://www.cl.cam.ac.uk/~mgk25/unicode.ht
ml#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 - $top['wh
ere'])); |
| 656 array_push($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 o
nto 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_ST
R, '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, $c)) - strlen(rtrim(s
ubstr($chrs, 0, $c), '\\'))) % 2 != 1)) { |
| 702 // found a quote, we're in a string, and it's not es
caped |
| 703 // we know that it's not escaped becase there is _no
t_ an |
| 704 // odd number of backslashes at the end of the strin
g so far |
| 705 array_pop($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_SLIC
E, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 710 // found a left-bracket, and we are in an array, obj
ect, or slice |
| 711 array_push($stk, array('what' => SERVICES_JSON_IN_AR
R, 'where' => $c, 'delim' => false)); |
| 712 //print("Found start of array at {$c}\n"); |
| 713 |
| 714 } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICE
S_JSON_IN_ARR)) { |
| 715 // found a right-bracket, and we're in an array |
| 716 array_pop($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_SLIC
E, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 721 // found a left-brace, and we are in an array, objec
t, or slice |
| 722 array_push($stk, array('what' => SERVICES_JSON_IN_OB
J, 'where' => $c, 'delim' => false)); |
| 723 //print("Found start of object at {$c}\n"); |
| 724 |
| 725 } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICE
S_JSON_IN_OBJ)) { |
| 726 // found a right-brace, and we're in an object |
| 727 array_pop($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($top['what'], array(SERVICES_JSON_SLIC
E, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
| 732 // found a comment start, and we are in an array, ob
ject, or slice |
| 733 array_push($stk, array('what' => SERVICES_JSON_IN_CM
T, '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($chr
s, $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 ?> |
OLD | NEW |