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JSON.php
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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 $use object behavior flags; combine with boolean-OR |
| 121 | * |
| 122 | * possible values: |
| 123 | * - SERVICES_JSON_LOOSE_TYPE: loose typing. |
| 124 | * "{...}" syntax creates associative arrays |
| 125 | * instead of objects in decode(). |
| 126 | * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. |
| 127 | * Values which can't be encoded (e.g. resources) |
| 128 | * appear as NULL instead of throwing errors. |
| 129 | * By default, a deeply-nested resource will |
| 130 | * bubble up with an error, so all return values |
| 131 | * from encode() should be checked with isError() |
| 132 | */ |
| 133 | function Services_JSON($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 range |
| 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 range |
| 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 $var any number, boolean, string, array, or object to be encoded. |
| 230 | * see argument 1 to Services_JSON() above for array-parsing behavior. |
| 231 | * if var is a strng, note that encode() always expects it |
| 232 | * to be in ASCII or UTF-8 format! |
| 233 | * |
| 234 | * @return mixed JSON string representation of input var or an error if a problem occurs |
| 235 | * @access public |
| 236 | */ |
| 237 | function encode($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#utf-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#utf-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#utf-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#utf-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#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{$c + 4}), |
| 348 | ord($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 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 |