| 1 |
|
| 2 |
<?php |
| 3 |
|
| 4 |
$b62alphabet = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
| 5 |
$b62alphanum = []; |
| 6 |
for ($i = 0; $i < strlen($b62alphabet); $i++) { |
| 7 |
$b62alphanum[$b62alphabet[$i]] = $i; |
| 8 |
} |
| 9 |
|
| 10 |
function isSep($ch) |
| 11 |
{ |
| 12 |
return $ch == '[' || $ch == ']' || $ch == '{' || $ch == '}' || |
| 13 |
$ch == '(' || $ch == ')' || $ch == ',' || $ch == ':' || $ch == '"'; |
| 14 |
} |
| 15 |
|
| 16 |
class StringWriter |
| 17 |
{ |
| 18 |
public $str; |
| 19 |
|
| 20 |
public $maybeNextSep; |
| 21 |
|
| 22 |
public $prevCh; |
| 23 |
|
| 24 |
public function __construct() |
| 25 |
{ |
| 26 |
$this->str = ''; |
| 27 |
$this->maybeNextSep = null; |
| 28 |
$this->prevCh = null; |
| 29 |
} |
| 30 |
|
| 31 |
public function write($s) |
| 32 |
{ |
| 33 |
if ($this->maybeNextSep) { |
| 34 |
if (! isSep($this->prevCh) && ! isSep($s[0])) { |
| 35 |
$this->str .= $this->maybeNextSep; |
| 36 |
} |
| 37 |
$this->maybeNextSep = null; |
| 38 |
} |
| 39 |
|
| 40 |
$this->str .= $s; |
| 41 |
$this->prevCh = $s[strlen($s) - 1]; |
| 42 |
} |
| 43 |
|
| 44 |
public function maybeSep($sep) |
| 45 |
{ |
| 46 |
if ($this->maybeNextSep) { |
| 47 |
$this->write($this->maybeNextSep); |
| 48 |
} |
| 49 |
|
| 50 |
$this->maybeNextSep = $sep; |
| 51 |
} |
| 52 |
} |
| 53 |
|
| 54 |
if (! function_exists('array_is_list')) { |
| 55 |
function array_is_list(array $arr) |
| 56 |
{ |
| 57 |
if ($arr === []) { |
| 58 |
return true; |
| 59 |
} |
| 60 |
|
| 61 |
return array_keys($arr) === range(0, count($arr) - 1); |
| 62 |
} |
| 63 |
} |
| 64 |
|
| 65 |
function analyzeValue($value, &$strings, &$objectShapes) |
| 66 |
{ |
| 67 |
if (is_array($value) && array_is_list($value)) { |
| 68 |
foreach ($value as $v) { |
| 69 |
analyzeValue($v, $strings, $objectShapes); |
| 70 |
} |
| 71 |
} elseif (is_array($value) && ! array_is_list($value)) { |
| 72 |
$keys = array_keys($value); |
| 73 |
sort($keys); |
| 74 |
|
| 75 |
if (count($keys) > 1) { |
| 76 |
$shapeHash = json_encode($keys); |
| 77 |
if (! isset($objectShapes[$shapeHash])) { |
| 78 |
$objectShapes[$shapeHash] = ['count' => 1, 'keys' => $keys]; |
| 79 |
} else { |
| 80 |
$objectShapes[$shapeHash]['count'] += 1; |
| 81 |
} |
| 82 |
} elseif (count($keys) == 1) { |
| 83 |
if (! isset($strings[$keys[0]])) { |
| 84 |
$strings[$keys[0]] = ['count' => 1]; |
| 85 |
} else { |
| 86 |
$strings[$keys[0]]['count'] += 1; |
| 87 |
} |
| 88 |
} |
| 89 |
|
| 90 |
foreach ($keys as $key) { |
| 91 |
analyzeValue($value[$key], $strings, $objectShapes); |
| 92 |
} |
| 93 |
} elseif (is_string($value) && strlen($value) > 1) { |
| 94 |
if (! isset($strings[$value])) { |
| 95 |
$strings[$value] = ['count' => 1]; |
| 96 |
} else { |
| 97 |
$strings[$value]['count'] += 1; |
| 98 |
} |
| 99 |
} |
| 100 |
} |
| 101 |
|
| 102 |
function analyze($value) |
| 103 |
{ |
| 104 |
$strings = []; |
| 105 |
$objectShapes = []; |
| 106 |
analyzeValue($value, $strings, $objectShapes); |
| 107 |
|
| 108 |
foreach ($objectShapes as $hash => $shape) { |
| 109 |
if ($shape['count'] == 1) { |
| 110 |
unset($objectShapes[$hash]); |
| 111 |
} |
| 112 |
|
| 113 |
foreach ($shape['keys'] as $key) { |
| 114 |
if (! isset($strings[$key])) { |
| 115 |
$strings[$key] = ['count' => 1]; |
| 116 |
} else { |
| 117 |
$strings[$key]['count'] += 1; |
| 118 |
} |
| 119 |
} |
| 120 |
} |
| 121 |
|
| 122 |
foreach ($strings as $string => $s) { |
| 123 |
if ($s['count'] == 1) { |
| 124 |
unset($strings[$string]); |
| 125 |
} |
| 126 |
} |
| 127 |
|
| 128 |
$stringList = array_keys($strings); |
| 129 |
usort($stringList, function ($a, $b) use ($strings) { |
| 130 |
return $strings[$b]['count'] - $strings[$a]['count']; |
| 131 |
}); |
| 132 |
|
| 133 |
$stringIds = []; |
| 134 |
for ($id = 0; $id < count($stringList); $id++) { |
| 135 |
$stringIds[$stringList[$id]] = $id; |
| 136 |
} |
| 137 |
|
| 138 |
$objectShapeList = []; |
| 139 |
$objectShapeIds = []; |
| 140 |
foreach ($objectShapes as $hash => $shape) { |
| 141 |
$objectShapeIds[$hash] = count($objectShapeList); |
| 142 |
$objectShapeList[] = $shape['keys']; |
| 143 |
} |
| 144 |
|
| 145 |
return [ |
| 146 |
'stringList' => $stringList, |
| 147 |
'stringIds' => $stringIds, |
| 148 |
'objectShapeList' => $objectShapeList, |
| 149 |
'objectShapeIds' => $objectShapeIds, |
| 150 |
]; |
| 151 |
} |
| 152 |
|
| 153 |
function stringify($value) |
| 154 |
{ |
| 155 |
$w = new StringWriter(); |
| 156 |
$meta = analyze($value); |
| 157 |
|
| 158 |
stringifyStringTable($w, $meta); |
| 159 |
$w->write(';'); |
| 160 |
stringifyObjectShapeTable($w, $meta); |
| 161 |
$w->write(';'); |
| 162 |
stringifyValue($w, $meta, $value); |
| 163 |
|
| 164 |
return $w->str; |
| 165 |
} |
| 166 |
|
| 167 |
function stringifyStringTable($w, $meta) |
| 168 |
{ |
| 169 |
if (count($meta['stringList']) == 0) { |
| 170 |
return; |
| 171 |
} |
| 172 |
|
| 173 |
stringifyString($w, $meta['stringList'][0]); |
| 174 |
for ($i = 1; $i < count($meta['stringList']); $i++) { |
| 175 |
$w->maybeSep(','); |
| 176 |
stringifyString($w, $meta['stringList'][$i]); |
| 177 |
} |
| 178 |
} |
| 179 |
|
| 180 |
function stringifyString($w, $string) |
| 181 |
{ |
| 182 |
if (preg_match('/^[a-zA-Z0-9]+$/', $string)) { |
| 183 |
$w->write($string); |
| 184 |
} else { |
| 185 |
$w->write(json_encode($string)); |
| 186 |
} |
| 187 |
} |
| 188 |
|
| 189 |
function stringifyObjectShapeTable($w, $meta) |
| 190 |
{ |
| 191 |
if (count($meta['objectShapeList']) == 0) { |
| 192 |
return; |
| 193 |
} |
| 194 |
|
| 195 |
stringifyObjectShape($w, $meta, $meta['objectShapeList'][0]); |
| 196 |
for ($i = 1; $i < count($meta['objectShapeList']); $i++) { |
| 197 |
$w->write(','); |
| 198 |
stringifyObjectShape($w, $meta, $meta['objectShapeList'][$i]); |
| 199 |
} |
| 200 |
} |
| 201 |
|
| 202 |
function stringifyObjectShape($w, $meta, $shape) |
| 203 |
{ |
| 204 |
stringifyObjectKey($w, $meta, $shape[0]); |
| 205 |
for ($i = 1; $i < count($shape); $i++) { |
| 206 |
$w->maybeSep(':'); |
| 207 |
stringifyObjectKey($w, $meta, $shape[$i]); |
| 208 |
} |
| 209 |
} |
| 210 |
|
| 211 |
function stringifyObjectKey($w, $meta, $key) |
| 212 |
{ |
| 213 |
$id = isset($meta['stringIds'][$key]) ? $meta['stringIds'][$key] : null; |
| 214 |
if ($id === null) { |
| 215 |
$w->write(json_encode($key)); |
| 216 |
} else { |
| 217 |
stringifyBase62($w, $id); |
| 218 |
} |
| 219 |
} |
| 220 |
|
| 221 |
function stringifyBase62($w, $num) |
| 222 |
{ |
| 223 |
global $b62alphabet; |
| 224 |
$str = ''; |
| 225 |
do { |
| 226 |
$str .= $b62alphabet[$num % 62]; |
| 227 |
$num = intval($num / 62); |
| 228 |
} while ($num > 0); |
| 229 |
|
| 230 |
for ($i = strlen($str) - 1; $i >= 0; $i--) { |
| 231 |
$w->write($str[$i]); |
| 232 |
} |
| 233 |
} |
| 234 |
|
| 235 |
function stringifyValue($w, $meta, $value) |
| 236 |
{ |
| 237 |
if (is_array($value) && array_is_list($value)) { |
| 238 |
$w->write('['); |
| 239 |
if (count($value) == 0) { |
| 240 |
$w->write(']'); |
| 241 |
|
| 242 |
return; |
| 243 |
} |
| 244 |
// print_r($value); |
| 245 |
stringifyValue($w, $meta, $value[0]); |
| 246 |
for ($i = 1; $i < count($value); $i++) { |
| 247 |
$w->maybeSep(','); |
| 248 |
stringifyValue($w, $meta, $value[$i]); |
| 249 |
} |
| 250 |
|
| 251 |
$w->write(']'); |
| 252 |
} elseif (is_array($value) && ! array_is_list($value)) { |
| 253 |
$keys = array_keys($value); |
| 254 |
sort($keys); |
| 255 |
$hash = json_encode($keys); |
| 256 |
$shapeId = isset($meta['objectShapeIds'][$hash]) ? $meta['objectShapeIds'][$hash] : null; |
| 257 |
if ($shapeId === null) { |
| 258 |
stringifyKeyedObjectValue($w, $meta, $value, $keys); |
| 259 |
} else { |
| 260 |
stringifyShapedObjectValue($w, $meta, $value, $keys, $shapeId); |
| 261 |
} |
| 262 |
} elseif (is_numeric($value)) { |
| 263 |
if ($value == intval($value) && ($value < 0 || $value > 10)) { |
| 264 |
$w->write($value < 0 ? 'I' : 'i'); |
| 265 |
stringifyBase62($w, abs($value)); |
| 266 |
} elseif (is_infinite($value) || is_nan($value)) { |
| 267 |
$w->write('n'); |
| 268 |
} else { |
| 269 |
$w->write(strval($value)); |
| 270 |
} |
| 271 |
} elseif (is_string($value)) { |
| 272 |
$stringId = isset($meta['stringIds'][$value]) ? $meta['stringIds'][$value] : null; |
| 273 |
if ($stringId === null) { |
| 274 |
$w->write(json_encode($value)); |
| 275 |
} else { |
| 276 |
$w->write('s'); |
| 277 |
stringifyBase62($w, $stringId); |
| 278 |
} |
| 279 |
} elseif (is_bool($value)) { |
| 280 |
$w->write($value ? 'b' : 'B'); |
| 281 |
} elseif ($value === null) { |
| 282 |
$w->write('n'); |
| 283 |
} else { |
| 284 |
throw new Exception("Can't serialize value: ".$value); |
| 285 |
} |
| 286 |
} |
| 287 |
|
| 288 |
function stringifyShapedObjectValue($w, $meta, $value, $keys, $shapeId) |
| 289 |
{ |
| 290 |
$w->write('('); |
| 291 |
stringifyBase62($w, $shapeId); |
| 292 |
if (count($keys) == 0) { |
| 293 |
$w->write(')'); |
| 294 |
|
| 295 |
return; |
| 296 |
} |
| 297 |
|
| 298 |
foreach ($keys as $key) { |
| 299 |
$w->maybeSep(','); |
| 300 |
stringifyValue($w, $meta, $value[$key]); |
| 301 |
} |
| 302 |
|
| 303 |
$w->write(')'); |
| 304 |
} |
| 305 |
|
| 306 |
function stringifyKeyedObjectValue($w, $meta, $value, $keys) |
| 307 |
{ |
| 308 |
$w->write('{'); |
| 309 |
if (count($keys) == 0) { |
| 310 |
$w->write('}'); |
| 311 |
|
| 312 |
return; |
| 313 |
} |
| 314 |
|
| 315 |
stringifyKeyValuePair($w, $meta, $keys[0], $value[$keys[0]]); |
| 316 |
for ($i = 1; $i < count($keys); $i++) { |
| 317 |
$w->maybeSep(','); |
| 318 |
stringifyKeyValuePair($w, $meta, $keys[$i], $value[$keys[$i]]); |
| 319 |
} |
| 320 |
|
| 321 |
$w->write('}'); |
| 322 |
} |
| 323 |
|
| 324 |
function stringifyKeyValuePair($w, $meta, $key, $val) |
| 325 |
{ |
| 326 |
stringifyObjectKey($w, $meta, $key); |
| 327 |
$w->maybeSep(':'); |
| 328 |
stringifyValue($w, $meta, $val); |
| 329 |
} |
| 330 |
|
| 331 |
class ParseErrors extends Exception |
| 332 |
{ |
| 333 |
public $index; |
| 334 |
|
| 335 |
public function __construct($msg, $index) |
| 336 |
{ |
| 337 |
parent::__construct($msg); |
| 338 |
$this->name = 'ParseError'; // In PHP, Exception has a 'message' property but not a 'name' property. |
| 339 |
$this->index = $index; |
| 340 |
} |
| 341 |
} |
| 342 |
|
| 343 |
class StringReader |
| 344 |
{ |
| 345 |
public $str; |
| 346 |
|
| 347 |
public $index; |
| 348 |
|
| 349 |
public function __construct($str) |
| 350 |
{ |
| 351 |
$this->str = $str; |
| 352 |
$this->index = 0; |
| 353 |
} |
| 354 |
|
| 355 |
public function peek() |
| 356 |
{ |
| 357 |
if ($this->index >= strlen($this->str)) { |
| 358 |
return null; |
| 359 |
} else { |
| 360 |
return $this->str[$this->index]; |
| 361 |
} |
| 362 |
} |
| 363 |
|
| 364 |
public function consume() |
| 365 |
{ |
| 366 |
$this->index += 1; |
| 367 |
} |
| 368 |
|
| 369 |
public function skip($ch) |
| 370 |
{ |
| 371 |
$peeked = $this->peek(); |
| 372 |
if ($peeked != $ch) { |
| 373 |
$this->error("Unexpected char: Expected '".$ch."', got '".$peeked."'"); |
| 374 |
} |
| 375 |
|
| 376 |
$this->consume(); |
| 377 |
} |
| 378 |
|
| 379 |
public function maybeSkip($ch) |
| 380 |
{ |
| 381 |
if ($this->peek() == $ch) { |
| 382 |
$this->consume(); |
| 383 |
} |
| 384 |
} |
| 385 |
|
| 386 |
public function error($msg) |
| 387 |
{ |
| 388 |
throw new ParseErrors($msg, $this->index); |
| 389 |
} |
| 390 |
} |
| 391 |
|
| 392 |
function parse($str) |
| 393 |
{ |
| 394 |
$r = new StringReader($str); |
| 395 |
$stringTable = parseStringTable($r); |
| 396 |
$r->skip(';'); |
| 397 |
$objectShapeTable = parseObjectShapeTable($r, $stringTable); |
| 398 |
$r->skip(';'); |
| 399 |
|
| 400 |
return parseValue($r, $stringTable, $objectShapeTable); |
| 401 |
} |
| 402 |
|
| 403 |
function parseStringTable($r) |
| 404 |
{ |
| 405 |
if ($r->peek() == ';') { |
| 406 |
return []; |
| 407 |
} |
| 408 |
|
| 409 |
$strings = []; |
| 410 |
while (true) { |
| 411 |
$strings[] = parseString($r); |
| 412 |
$ch = $r->peek(); |
| 413 |
if ($ch == ';') { |
| 414 |
return $strings; |
| 415 |
} elseif ($ch == ',') { |
| 416 |
$r->consume(); |
| 417 |
} |
| 418 |
} |
| 419 |
} |
| 420 |
|
| 421 |
function parseString($r) |
| 422 |
{ |
| 423 |
if ($r->peek() == '"') { |
| 424 |
return parseJsonString($r); |
| 425 |
} elseif (preg_match('/[a-zA-Z0-9]/', $r->peek())) { |
| 426 |
return parsePlainString($r); |
| 427 |
} else { |
| 428 |
$r->error('Expected plain string or JSON string'); |
| 429 |
} |
| 430 |
} |
| 431 |
|
| 432 |
function parsePlainString($r) |
| 433 |
{ |
| 434 |
$str = $r->peek(); |
| 435 |
$r->consume(); |
| 436 |
|
| 437 |
while (true) { |
| 438 |
$ch = $r->peek(); |
| 439 |
if (! preg_match('/[a-zA-Z0-9]/', $ch)) { |
| 440 |
return $str; |
| 441 |
} |
| 442 |
|
| 443 |
$str .= $ch; |
| 444 |
$r->consume(); |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
function parseJsonString($r) |
| 449 |
{ |
| 450 |
$start = $r->index; |
| 451 |
$r->skip('"'); |
| 452 |
while (true) { |
| 453 |
$ch = $r->peek(); |
| 454 |
$r->consume(); |
| 455 |
if ($ch == '"') { |
| 456 |
break; |
| 457 |
} elseif ($ch == '\\') { |
| 458 |
$r->consume(); |
| 459 |
} elseif ($ch === null) { |
| 460 |
$r->error('Unexpected EOF'); |
| 461 |
} |
| 462 |
} |
| 463 |
|
| 464 |
$substring = substr($r->str, $start, $r->index - $start); |
| 465 |
|
| 466 |
return json_decode($substring, true); |
| 467 |
} |
| 468 |
|
| 469 |
function parseObjectShapeTable($r, $stringTable) |
| 470 |
{ |
| 471 |
if ($r->peek() == ';') { |
| 472 |
return []; |
| 473 |
} |
| 474 |
|
| 475 |
$shapes = []; |
| 476 |
while (true) { |
| 477 |
$shapes[] = parseObjectShape($r, $stringTable); |
| 478 |
$ch = $r->peek(); |
| 479 |
if ($ch == ';') { |
| 480 |
return $shapes; |
| 481 |
} elseif ($ch == ',') { |
| 482 |
$r->consume(); |
| 483 |
} |
| 484 |
} |
| 485 |
} |
| 486 |
|
| 487 |
function parseObjectShape($r, $stringTable) |
| 488 |
{ |
| 489 |
$shape = []; |
| 490 |
while (true) { |
| 491 |
$shape[] = parseObjectKey($r, $stringTable); |
| 492 |
$ch = $r->peek(); |
| 493 |
if ($ch == ',' || $ch == ';') { |
| 494 |
return $shape; |
| 495 |
} elseif ($ch == ':') { |
| 496 |
$r->consume(); |
| 497 |
} |
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
function parseObjectKey($r, $stringTable) |
| 502 |
{ |
| 503 |
if ($r->peek() == '"') { |
| 504 |
return parseJsonString($r); |
| 505 |
} else { |
| 506 |
$id = parseBase62($r); |
| 507 |
if ($id >= count($stringTable)) { |
| 508 |
$r->error('String ID '.$id.' out of range'); |
| 509 |
} |
| 510 |
|
| 511 |
return $stringTable[$id]; |
| 512 |
} |
| 513 |
} |
| 514 |
|
| 515 |
function parseBase62($r) |
| 516 |
{ |
| 517 |
global $b62alphanum; |
| 518 |
|
| 519 |
if (! preg_match('/[0-9a-zA-Z]/', $r->peek())) { |
| 520 |
$r->error('Expected base62 value'); |
| 521 |
} |
| 522 |
|
| 523 |
$num = 0; |
| 524 |
while (true) { |
| 525 |
$num *= 62; |
| 526 |
$num += $b62alphanum[$r->peek()]; |
| 527 |
$r->consume(); |
| 528 |
if (! preg_match('/[0-9a-zA-Z]/', $r->peek())) { |
| 529 |
return $num; |
| 530 |
} |
| 531 |
} |
| 532 |
} |
| 533 |
|
| 534 |
function parseValue($r, $stringTable, $objectShapeTable) |
| 535 |
{ |
| 536 |
$ch = $r->peek(); |
| 537 |
if ($ch == '[') { |
| 538 |
return parseArrayValue($r, $stringTable, $objectShapeTable); |
| 539 |
} elseif ($ch == '(') { |
| 540 |
return parseShapedObjectValue($r, $stringTable, $objectShapeTable); |
| 541 |
} elseif ($ch == '{') { |
| 542 |
return parseKeyedObjectValue($r, $stringTable, $objectShapeTable); |
| 543 |
} elseif (preg_match('/[iIf0-9\-]/', $ch)) { |
| 544 |
return parseNumberValue($r); |
| 545 |
} elseif ($ch == 's' || $ch == '"') { |
| 546 |
return parseStringValue($r, $stringTable); |
| 547 |
} elseif ($ch == 'b') { |
| 548 |
$r->consume(); |
| 549 |
|
| 550 |
return true; |
| 551 |
} elseif ($ch == 'B') { |
| 552 |
$r->consume(); |
| 553 |
|
| 554 |
return false; |
| 555 |
} elseif ($ch == 'n') { |
| 556 |
$r->consume(); |
| 557 |
|
| 558 |
return null; |
| 559 |
} else { |
| 560 |
$r->error("Expected value, got '".$ch."'"); |
| 561 |
} |
| 562 |
} |
| 563 |
|
| 564 |
function parseArrayValue($r, $stringTable, $objectShapeTable) |
| 565 |
{ |
| 566 |
$r->skip('['); |
| 567 |
if ($r->peek() == ']') { |
| 568 |
$r->consume(); |
| 569 |
|
| 570 |
return []; |
| 571 |
} |
| 572 |
|
| 573 |
$arr = []; |
| 574 |
while (true) { |
| 575 |
$arr[] = parseValue($r, $stringTable, $objectShapeTable); |
| 576 |
$ch = $r->peek(); |
| 577 |
if ($ch == ']') { |
| 578 |
$r->consume(); |
| 579 |
|
| 580 |
return $arr; |
| 581 |
} elseif ($ch == ',') { |
| 582 |
$r->consume(); |
| 583 |
} |
| 584 |
} |
| 585 |
} |
| 586 |
|
| 587 |
function parseShapedObjectValue($r, $stringTable, $objectShapeTable) |
| 588 |
{ |
| 589 |
$r->skip('('); |
| 590 |
$shapeId = parseBase62($r); |
| 591 |
if ($shapeId >= count($objectShapeTable)) { |
| 592 |
$r->error('Shape ID '.$shapeId.' out of range'); |
| 593 |
} |
| 594 |
|
| 595 |
$shape = $objectShapeTable[$shapeId]; |
| 596 |
$obj = []; |
| 597 |
foreach ($shape as $key) { |
| 598 |
if ($r->peek() == ',') { |
| 599 |
$r->consume(); |
| 600 |
} |
| 601 |
$obj[$key] = parseValue($r, $stringTable, $objectShapeTable); |
| 602 |
} |
| 603 |
|
| 604 |
$r->skip(')'); |
| 605 |
|
| 606 |
return $obj; |
| 607 |
} |
| 608 |
|
| 609 |
function parseKeyedObjectValue($r, $stringTable, $objectShapeTable) |
| 610 |
{ |
| 611 |
$r->skip('{'); |
| 612 |
if ($r->peek() == '}') { |
| 613 |
$r->consume(); |
| 614 |
|
| 615 |
return []; |
| 616 |
} |
| 617 |
|
| 618 |
$obj = []; |
| 619 |
while (true) { |
| 620 |
$key = parseObjectKey($r, $stringTable); |
| 621 |
if ($r->peek() == ':') { |
| 622 |
$r->consume(); |
| 623 |
} |
| 624 |
|
| 625 |
$obj[$key] = parseValue($r, $stringTable, $objectShapeTable); |
| 626 |
$ch = $r->peek(); |
| 627 |
if ($ch == ',') { |
| 628 |
$r->consume(); |
| 629 |
} elseif ($ch == '}') { |
| 630 |
$r->consume(); |
| 631 |
|
| 632 |
return $obj; |
| 633 |
} |
| 634 |
} |
| 635 |
} |
| 636 |
|
| 637 |
function parseNumberValue($r) |
| 638 |
{ |
| 639 |
$ch = $r->peek(); |
| 640 |
if ($ch == 'i') { |
| 641 |
$r->consume(); |
| 642 |
|
| 643 |
return parseBase62($r); |
| 644 |
} elseif ($ch == 'I') { |
| 645 |
$r->consume(); |
| 646 |
|
| 647 |
return -parseBase62($r); |
| 648 |
} else { |
| 649 |
return parseFloatValue($r); |
| 650 |
} |
| 651 |
} |
| 652 |
|
| 653 |
function parseFloatValue($r) |
| 654 |
{ |
| 655 |
// Here, we read the float, but then use PHP's float parser, |
| 656 |
// because making a float parser and serializer pair |
| 657 |
// which can round-trip any number is apparently pretty hard |
| 658 |
|
| 659 |
$str = ''; |
| 660 |
|
| 661 |
if (($ch = $r->peek()) == '-') { |
| 662 |
$str .= $ch; |
| 663 |
$r->consume(); |
| 664 |
} |
| 665 |
|
| 666 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 667 |
$str .= $ch; |
| 668 |
$r->consume(); |
| 669 |
} |
| 670 |
|
| 671 |
if ($str == '' || $str == '-') { |
| 672 |
$r->error('Zero-length number in float literal'); |
| 673 |
} |
| 674 |
|
| 675 |
if (($ch = $r->peek()) == '.') { |
| 676 |
$str .= $ch; |
| 677 |
$r->consume(); |
| 678 |
|
| 679 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 680 |
$str .= $ch; |
| 681 |
$r->consume(); |
| 682 |
} |
| 683 |
|
| 684 |
if ($str[strlen($str) - 1] == '.') { |
| 685 |
$r->error('Zero-length fractional part in float literal'); |
| 686 |
} |
| 687 |
} |
| 688 |
|
| 689 |
$ch = $r->peek(); |
| 690 |
if ($ch == 'e' || $ch == 'E') { |
| 691 |
$str .= $ch; |
| 692 |
$r->consume(); |
| 693 |
|
| 694 |
$ch = $r->peek(); |
| 695 |
if ($ch == '+' || $ch == '-') { |
| 696 |
$str .= $ch; |
| 697 |
$r->consume(); |
| 698 |
} |
| 699 |
|
| 700 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 701 |
$str .= $ch; |
| 702 |
$r->consume(); |
| 703 |
} |
| 704 |
|
| 705 |
if (! preg_match('/[0-9]/', $str[strlen($str) - 1])) { |
| 706 |
$r->error('Zero-length exponential part in float literal'); |
| 707 |
} |
| 708 |
} |
| 709 |
|
| 710 |
return floatval($str); |
| 711 |
} |
| 712 |
|
| 713 |
function parseStringValue($r, $stringTable) |
| 714 |
{ |
| 715 |
if ($r->peek() == '"') { |
| 716 |
return parseJsonString($r); |
| 717 |
} else { |
| 718 |
$r->skip('s'); |
| 719 |
$id = parseBase62($r); |
| 720 |
if ($id >= count($stringTable)) { |
| 721 |
$r->error('String ID '.$id.' out of range'); |
| 722 |
} |
| 723 |
|
| 724 |
return $stringTable[$id]; |
| 725 |
} |
| 726 |
} |
| 727 |
|
| 728 |
// print_r( |
| 729 |
// stringify( |
| 730 |
// // json_encode( |
| 731 |
// parse('Programmer;"age""first-name""full-time""occupation";{"people"[(0,iw"Bob"b"Plumber")(0,is"Alice"b,s0)(0,iA"Bernard"n,n)(0,iV"El"B,s0)]}') |
| 732 |
// // ) |
| 733 |
// ) |
| 734 |
// ); |
| 735 |
|
| 736 |
print_r( |
| 737 |
parse('Programmer;"age""first-name""full-time""occupation";{"people"[(0,iw"Bob"b"Plumber")(0,is"Alice"b,s0)(0,iA"Bernard"n,n)(0,iV"El"B,s0)]}') |
| 738 |
); |
| 739 |
|
