| 1 |
<?php |
| 2 |
|
| 3 |
namespace BitCode\BitForm\Jcof; |
| 4 |
|
| 5 |
class Jcof |
| 6 |
{ |
| 7 |
private const B62_ALPHABET = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
| 8 |
|
| 9 |
private const B62_ALPHABET_NUM = [ |
| 10 |
'0' => 0, |
| 11 |
'1' => 1, |
| 12 |
'2' => 2, |
| 13 |
'3' => 3, |
| 14 |
'4' => 4, |
| 15 |
'5' => 5, |
| 16 |
'6' => 6, |
| 17 |
'7' => 7, |
| 18 |
'8' => 8, |
| 19 |
'9' => 9, |
| 20 |
'a' => 10, |
| 21 |
'b' => 11, |
| 22 |
'c' => 12, |
| 23 |
'd' => 13, |
| 24 |
'e' => 14, |
| 25 |
'f' => 15, |
| 26 |
'g' => 16, |
| 27 |
'h' => 17, |
| 28 |
'i' => 18, |
| 29 |
'j' => 19, |
| 30 |
'k' => 20, |
| 31 |
'l' => 21, |
| 32 |
'm' => 22, |
| 33 |
'n' => 23, |
| 34 |
'o' => 24, |
| 35 |
'p' => 25, |
| 36 |
'q' => 26, |
| 37 |
'r' => 27, |
| 38 |
's' => 28, |
| 39 |
't' => 29, |
| 40 |
'u' => 30, |
| 41 |
'v' => 31, |
| 42 |
'w' => 32, |
| 43 |
'x' => 33, |
| 44 |
'y' => 34, |
| 45 |
'z' => 35, |
| 46 |
'A' => 36, |
| 47 |
'B' => 37, |
| 48 |
'C' => 38, |
| 49 |
'D' => 39, |
| 50 |
'E' => 40, |
| 51 |
'F' => 41, |
| 52 |
'G' => 42, |
| 53 |
'H' => 43, |
| 54 |
'I' => 44, |
| 55 |
'J' => 45, |
| 56 |
'K' => 46, |
| 57 |
'L' => 47, |
| 58 |
'M' => 48, |
| 59 |
'N' => 49, |
| 60 |
'O' => 50, |
| 61 |
'P' => 51, |
| 62 |
'Q' => 52, |
| 63 |
'R' => 53, |
| 64 |
'S' => 54, |
| 65 |
'T' => 55, |
| 66 |
'U' => 56, |
| 67 |
'V' => 57, |
| 68 |
'W' => 58, |
| 69 |
'X' => 59, |
| 70 |
'Y' => 60, |
| 71 |
'Z' => 61, |
| 72 |
]; |
| 73 |
|
| 74 |
public static function parse($str) |
| 75 |
{ |
| 76 |
$self = new self(); |
| 77 |
$r = new StringReader($str); |
| 78 |
$stringTable = $self->parseStringTable($r); |
| 79 |
$r->skip(';'); |
| 80 |
$objectShapeTable = $self->parseObjectShapeTable($r, $stringTable); |
| 81 |
$r->skip(';'); |
| 82 |
|
| 83 |
return $self->parseValue($r, $stringTable, $objectShapeTable); |
| 84 |
} |
| 85 |
|
| 86 |
public static function stringify($value) |
| 87 |
{ |
| 88 |
$self = new self(); |
| 89 |
$w = new StringWriter(); |
| 90 |
$meta = $self->analyze($value); |
| 91 |
|
| 92 |
$self->stringifyStringTable($w, $meta); |
| 93 |
$w->write(';'); |
| 94 |
$self->stringifyObjectShapeTable($w, $meta); |
| 95 |
$w->write(';'); |
| 96 |
$self->stringifyValue($w, $meta, $value); |
| 97 |
|
| 98 |
return $w->str; |
| 99 |
} |
| 100 |
|
| 101 |
public function arrayIsList(array $arr) |
| 102 |
{ |
| 103 |
if ($arr === []) { |
| 104 |
return true; |
| 105 |
} |
| 106 |
|
| 107 |
return array_keys($arr) === range(0, count($arr) - 1); |
| 108 |
} |
| 109 |
|
| 110 |
public function analyzeValue($value, &$strings, &$objectShapes) |
| 111 |
{ |
| 112 |
if (is_array($value) && $this->arrayIsList($value)) { |
| 113 |
foreach ($value as $v) { |
| 114 |
$this->analyzeValue($v, $strings, $objectShapes); |
| 115 |
} |
| 116 |
} elseif (is_array($value) && ! $this->arrayIsList($value)) { |
| 117 |
$keys = array_keys($value); |
| 118 |
sort($keys); |
| 119 |
|
| 120 |
if (count($keys) > 1) { |
| 121 |
$shapeHash = json_encode($keys); |
| 122 |
if (! isset($objectShapes[$shapeHash])) { |
| 123 |
$objectShapes[$shapeHash] = ['count' => 1, 'keys' => $keys]; |
| 124 |
} else { |
| 125 |
$objectShapes[$shapeHash]['count'] += 1; |
| 126 |
} |
| 127 |
} elseif (count($keys) == 1) { |
| 128 |
if (! isset($strings[$keys[0]])) { |
| 129 |
$strings[$keys[0]] = ['count' => 1]; |
| 130 |
} else { |
| 131 |
$strings[$keys[0]]['count'] += 1; |
| 132 |
} |
| 133 |
} |
| 134 |
|
| 135 |
foreach ($keys as $key) { |
| 136 |
$this->analyzeValue($value[$key], $strings, $objectShapes); |
| 137 |
} |
| 138 |
} elseif (is_string($value) && strlen($value) > 1) { |
| 139 |
if (! isset($strings[$value])) { |
| 140 |
$strings[$value] = ['count' => 1]; |
| 141 |
} else { |
| 142 |
$strings[$value]['count'] += 1; |
| 143 |
} |
| 144 |
} |
| 145 |
} |
| 146 |
|
| 147 |
public function analyze($value) |
| 148 |
{ |
| 149 |
$strings = []; |
| 150 |
$objectShapes = []; |
| 151 |
$this->analyzeValue($value, $strings, $objectShapes); |
| 152 |
|
| 153 |
foreach ($objectShapes as $hash => $shape) { |
| 154 |
if ($shape['count'] == 1) { |
| 155 |
unset($objectShapes[$hash]); |
| 156 |
} |
| 157 |
|
| 158 |
foreach ($shape['keys'] as $key) { |
| 159 |
if (! isset($strings[$key])) { |
| 160 |
$strings[$key] = ['count' => 1]; |
| 161 |
} else { |
| 162 |
$strings[$key]['count'] += 1; |
| 163 |
} |
| 164 |
} |
| 165 |
} |
| 166 |
|
| 167 |
foreach ($strings as $string => $s) { |
| 168 |
if ($s['count'] == 1) { |
| 169 |
unset($strings[$string]); |
| 170 |
} |
| 171 |
} |
| 172 |
|
| 173 |
$stringList = array_keys($strings); |
| 174 |
usort($stringList, function ($a, $b) use ($strings) { |
| 175 |
return $strings[$b]['count'] - $strings[$a]['count']; |
| 176 |
}); |
| 177 |
|
| 178 |
$stringIds = []; |
| 179 |
for ($id = 0; $id < count($stringList); $id++) { |
| 180 |
$stringIds[$stringList[$id]] = $id; |
| 181 |
} |
| 182 |
|
| 183 |
$objectShapeList = []; |
| 184 |
$objectShapeIds = []; |
| 185 |
foreach ($objectShapes as $hash => $shape) { |
| 186 |
$objectShapeIds[$hash] = count($objectShapeList); |
| 187 |
$objectShapeList[] = $shape['keys']; |
| 188 |
} |
| 189 |
|
| 190 |
return [ |
| 191 |
'stringList' => $stringList, |
| 192 |
'stringIds' => $stringIds, |
| 193 |
'objectShapeList' => $objectShapeList, |
| 194 |
'objectShapeIds' => $objectShapeIds, |
| 195 |
]; |
| 196 |
} |
| 197 |
|
| 198 |
public function stringifyStringTable($w, $meta) |
| 199 |
{ |
| 200 |
if (count($meta['stringList']) == 0) { |
| 201 |
return; |
| 202 |
} |
| 203 |
|
| 204 |
$this->stringifyString($w, $meta['stringList'][0]); |
| 205 |
for ($i = 1; $i < count($meta['stringList']); $i++) { |
| 206 |
$w->maybeSep(','); |
| 207 |
$this->stringifyString($w, $meta['stringList'][$i]); |
| 208 |
} |
| 209 |
} |
| 210 |
|
| 211 |
public function stringifyString($w, $string) |
| 212 |
{ |
| 213 |
if (preg_match('/^[a-zA-Z0-9]+$/', $string)) { |
| 214 |
$w->write($string); |
| 215 |
} else { |
| 216 |
$w->write(json_encode($string)); |
| 217 |
} |
| 218 |
} |
| 219 |
|
| 220 |
public function stringifyObjectShapeTable($w, $meta) |
| 221 |
{ |
| 222 |
if (count($meta['objectShapeList']) == 0) { |
| 223 |
return; |
| 224 |
} |
| 225 |
|
| 226 |
$this->stringifyObjectShape($w, $meta, $meta['objectShapeList'][0]); |
| 227 |
for ($i = 1; $i < count($meta['objectShapeList']); $i++) { |
| 228 |
$w->write(','); |
| 229 |
$this->stringifyObjectShape($w, $meta, $meta['objectShapeList'][$i]); |
| 230 |
} |
| 231 |
} |
| 232 |
|
| 233 |
public function stringifyObjectShape($w, $meta, $shape) |
| 234 |
{ |
| 235 |
$this->stringifyObjectKey($w, $meta, $shape[0]); |
| 236 |
for ($i = 1; $i < count($shape); $i++) { |
| 237 |
$w->maybeSep(':'); |
| 238 |
$this->stringifyObjectKey($w, $meta, $shape[$i]); |
| 239 |
} |
| 240 |
} |
| 241 |
|
| 242 |
public function stringifyObjectKey($w, $meta, $key) |
| 243 |
{ |
| 244 |
$id = isset($meta['stringIds'][$key]) ? $meta['stringIds'][$key] : null; |
| 245 |
if ($id === null) { |
| 246 |
$w->write(json_encode($key)); |
| 247 |
} else { |
| 248 |
$this->stringifyBase62($w, $id); |
| 249 |
} |
| 250 |
} |
| 251 |
|
| 252 |
public function stringifyBase62($w, $num) |
| 253 |
{ |
| 254 |
$str = ''; |
| 255 |
do { |
| 256 |
$str .= self::B62_ALPHABET[$num % 62]; |
| 257 |
$num = intval($num / 62); |
| 258 |
} while ($num > 0); |
| 259 |
|
| 260 |
for ($i = strlen($str) - 1; $i >= 0; $i--) { |
| 261 |
$w->write(substr($str, $i, 1)); |
| 262 |
} |
| 263 |
} |
| 264 |
|
| 265 |
public function stringifyValue($w, $meta, $value) |
| 266 |
{ |
| 267 |
if (is_array($value) && $this->arrayIsList($value)) { |
| 268 |
$w->write('['); |
| 269 |
if (count($value) == 0) { |
| 270 |
$w->write(']'); |
| 271 |
|
| 272 |
return; |
| 273 |
} |
| 274 |
// print_r($value); |
| 275 |
$this->stringifyValue($w, $meta, $value[0]); |
| 276 |
for ($i = 1; $i < count($value); $i++) { |
| 277 |
$w->maybeSep(','); |
| 278 |
$this->stringifyValue($w, $meta, $value[$i]); |
| 279 |
} |
| 280 |
|
| 281 |
$w->write(']'); |
| 282 |
} elseif (is_array($value) && ! $this->arrayIsList($value)) { |
| 283 |
$keys = array_keys($value); |
| 284 |
sort($keys); |
| 285 |
$hash = json_encode($keys); |
| 286 |
$shapeId = isset($meta['objectShapeIds'][$hash]) ? $meta['objectShapeIds'][$hash] : null; |
| 287 |
if ($shapeId === null) { |
| 288 |
$this->stringifyKeyedObjectValue($w, $meta, $value, $keys); |
| 289 |
} else { |
| 290 |
$this->stringifyShapedObjectValue($w, $meta, $value, $keys, $shapeId); |
| 291 |
} |
| 292 |
} elseif (is_numeric($value) && ! is_string($value)) { |
| 293 |
if ($value == intval($value) && ($value < 0 || $value > 10)) { |
| 294 |
$w->write($value < 0 ? 'I' : 'i'); |
| 295 |
$this->stringifyBase62($w, abs($value)); |
| 296 |
} elseif (is_infinite($value) || is_nan($value)) { |
| 297 |
$w->write('n'); |
| 298 |
} else { |
| 299 |
$w->write(json_encode($value)); |
| 300 |
} |
| 301 |
} elseif (is_string($value)) { |
| 302 |
$stringId = isset($meta['stringIds'][$value]) ? $meta['stringIds'][$value] : null; |
| 303 |
if ($stringId === null) { |
| 304 |
$w->write(json_encode($value)); |
| 305 |
} else { |
| 306 |
$w->write('s'); |
| 307 |
$this->stringifyBase62($w, $stringId); |
| 308 |
} |
| 309 |
} elseif (is_bool($value)) { |
| 310 |
$w->write($value ? 'b' : 'B'); |
| 311 |
} elseif ($value === null) { |
| 312 |
$w->write('n'); |
| 313 |
} else { |
| 314 |
throw new Exception("Can't serialize value: ".$value); |
| 315 |
} |
| 316 |
} |
| 317 |
|
| 318 |
public function stringifyShapedObjectValue($w, $meta, $value, $keys, $shapeId) |
| 319 |
{ |
| 320 |
$w->write('('); |
| 321 |
$this->stringifyBase62($w, $shapeId); |
| 322 |
if (count($keys) == 0) { |
| 323 |
$w->write(')'); |
| 324 |
|
| 325 |
return; |
| 326 |
} |
| 327 |
|
| 328 |
foreach ($keys as $key) { |
| 329 |
$w->maybeSep(','); |
| 330 |
$this->stringifyValue($w, $meta, $value[$key]); |
| 331 |
} |
| 332 |
|
| 333 |
$w->write(')'); |
| 334 |
} |
| 335 |
|
| 336 |
public function stringifyKeyedObjectValue($w, $meta, $value, $keys) |
| 337 |
{ |
| 338 |
$w->write('{'); |
| 339 |
if (count($keys) == 0) { |
| 340 |
$w->write('}'); |
| 341 |
|
| 342 |
return; |
| 343 |
} |
| 344 |
|
| 345 |
$this->stringifyKeyValuePair($w, $meta, $keys[0], $value[$keys[0]]); |
| 346 |
for ($i = 1; $i < count($keys); $i++) { |
| 347 |
$w->maybeSep(','); |
| 348 |
$this->stringifyKeyValuePair($w, $meta, $keys[$i], $value[$keys[$i]]); |
| 349 |
} |
| 350 |
|
| 351 |
$w->write('}'); |
| 352 |
} |
| 353 |
|
| 354 |
public function stringifyKeyValuePair($w, $meta, $key, $val) |
| 355 |
{ |
| 356 |
$this->stringifyObjectKey($w, $meta, $key); |
| 357 |
$w->maybeSep(':'); |
| 358 |
$this->stringifyValue($w, $meta, $val); |
| 359 |
} |
| 360 |
|
| 361 |
public function parseStringTable($r) |
| 362 |
{ |
| 363 |
if ($r->peek() == ';') { |
| 364 |
return []; |
| 365 |
} |
| 366 |
|
| 367 |
$strings = []; |
| 368 |
while (true) { |
| 369 |
$strings[] = $this->parseString($r); |
| 370 |
$ch = $r->peek(); |
| 371 |
if ($ch == ';') { |
| 372 |
return $strings; |
| 373 |
} elseif ($ch == ',') { |
| 374 |
$r->consume(); |
| 375 |
} |
| 376 |
} |
| 377 |
} |
| 378 |
|
| 379 |
public function parseString($r) |
| 380 |
{ |
| 381 |
if ($r->peek() == '"') { |
| 382 |
return $this->parseJsonString($r); |
| 383 |
} elseif (preg_match('/[a-zA-Z0-9]/', $r->peek())) { |
| 384 |
return $this->parsePlainString($r); |
| 385 |
} else { |
| 386 |
$r->error('Expected plain string or JSON string'); |
| 387 |
} |
| 388 |
} |
| 389 |
|
| 390 |
public function parsePlainString($r) |
| 391 |
{ |
| 392 |
$str = $r->peek(); |
| 393 |
$r->consume(); |
| 394 |
|
| 395 |
while (true) { |
| 396 |
$ch = $r->peek(); |
| 397 |
if (! preg_match('/[a-zA-Z0-9]/', $ch)) { |
| 398 |
return $str; |
| 399 |
} |
| 400 |
|
| 401 |
$str .= $ch; |
| 402 |
$r->consume(); |
| 403 |
} |
| 404 |
} |
| 405 |
|
| 406 |
public function parseJsonString($r) |
| 407 |
{ |
| 408 |
$start = $r->index; |
| 409 |
$r->skip('"'); |
| 410 |
while (true) { |
| 411 |
$ch = $r->peek(); |
| 412 |
$r->consume(); |
| 413 |
if ($ch == '"') { |
| 414 |
break; |
| 415 |
} elseif ($ch == '\\') { |
| 416 |
$r->consume(); |
| 417 |
} elseif ($ch === null) { |
| 418 |
$r->error('Unexpected EOF'); |
| 419 |
} |
| 420 |
} |
| 421 |
|
| 422 |
$substring = substr($r->str, $start, $r->index - $start); |
| 423 |
|
| 424 |
return json_decode($substring, true); |
| 425 |
} |
| 426 |
|
| 427 |
public function parseObjectShapeTable($r, $stringTable) |
| 428 |
{ |
| 429 |
if ($r->peek() == ';') { |
| 430 |
return []; |
| 431 |
} |
| 432 |
|
| 433 |
$shapes = []; |
| 434 |
while (true) { |
| 435 |
$shapes[] = $this->parseObjectShape($r, $stringTable); |
| 436 |
$ch = $r->peek(); |
| 437 |
if ($ch == ';') { |
| 438 |
return $shapes; |
| 439 |
} elseif ($ch == ',') { |
| 440 |
$r->consume(); |
| 441 |
} |
| 442 |
} |
| 443 |
} |
| 444 |
|
| 445 |
public function parseObjectShape($r, $stringTable) |
| 446 |
{ |
| 447 |
$shape = []; |
| 448 |
while (true) { |
| 449 |
$shape[] = $this->parseObjectKey($r, $stringTable); |
| 450 |
$ch = $r->peek(); |
| 451 |
if ($ch == ',' || $ch == ';') { |
| 452 |
return $shape; |
| 453 |
} elseif ($ch == ':') { |
| 454 |
$r->consume(); |
| 455 |
} |
| 456 |
} |
| 457 |
} |
| 458 |
|
| 459 |
public function parseObjectKey($r, $stringTable) |
| 460 |
{ |
| 461 |
if ($r->peek() == '"') { |
| 462 |
return $this->parseJsonString($r); |
| 463 |
} else { |
| 464 |
$id = $this->parseBase62($r); |
| 465 |
if ($id >= count($stringTable)) { |
| 466 |
$r->error('String ID '.$id.' out of range'); |
| 467 |
} |
| 468 |
|
| 469 |
return $stringTable[$id]; |
| 470 |
} |
| 471 |
} |
| 472 |
|
| 473 |
public function parseBase62($r) |
| 474 |
{ |
| 475 |
if (! preg_match('/[0-9a-zA-Z]/', $r->peek())) { |
| 476 |
$r->error('Expected base62 value'); |
| 477 |
} |
| 478 |
|
| 479 |
$num = 0; |
| 480 |
while (true) { |
| 481 |
$num *= 62; |
| 482 |
$num += self::B62_ALPHABET_NUM[$r->peek()]; |
| 483 |
$r->consume(); |
| 484 |
if (! preg_match('/[0-9a-zA-Z]/', $r->peek())) { |
| 485 |
return $num; |
| 486 |
} |
| 487 |
} |
| 488 |
} |
| 489 |
|
| 490 |
public function parseValue($r, $stringTable, $objectShapeTable) |
| 491 |
{ |
| 492 |
$ch = $r->peek(); |
| 493 |
if ($ch == '[') { |
| 494 |
return $this->parseArrayValue($r, $stringTable, $objectShapeTable); |
| 495 |
} elseif ($ch == '(') { |
| 496 |
return $this->parseShapedObjectValue($r, $stringTable, $objectShapeTable); |
| 497 |
} elseif ($ch == '{') { |
| 498 |
return $this->parseKeyedObjectValue($r, $stringTable, $objectShapeTable); |
| 499 |
} elseif (preg_match('/[iIf0-9\-]/', $ch)) { |
| 500 |
return $this->parseNumberValue($r); |
| 501 |
} elseif ($ch == 's' || $ch == '"') { |
| 502 |
return $this->parseStringValue($r, $stringTable); |
| 503 |
} elseif ($ch == 'b') { |
| 504 |
$r->consume(); |
| 505 |
|
| 506 |
return true; |
| 507 |
} elseif ($ch == 'B') { |
| 508 |
$r->consume(); |
| 509 |
|
| 510 |
return false; |
| 511 |
} elseif ($ch == 'n') { |
| 512 |
$r->consume(); |
| 513 |
|
| 514 |
return null; |
| 515 |
} else { |
| 516 |
$r->error("Expected value, got '".$ch."'"); |
| 517 |
} |
| 518 |
} |
| 519 |
|
| 520 |
public function parseArrayValue($r, $stringTable, $objectShapeTable) |
| 521 |
{ |
| 522 |
$r->skip('['); |
| 523 |
if ($r->peek() == ']') { |
| 524 |
$r->consume(); |
| 525 |
|
| 526 |
return []; |
| 527 |
} |
| 528 |
|
| 529 |
$arr = []; |
| 530 |
while (true) { |
| 531 |
$arr[] = $this->parseValue($r, $stringTable, $objectShapeTable); |
| 532 |
$ch = $r->peek(); |
| 533 |
if ($ch == ']') { |
| 534 |
$r->consume(); |
| 535 |
|
| 536 |
return $arr; |
| 537 |
} elseif ($ch == ',') { |
| 538 |
$r->consume(); |
| 539 |
} |
| 540 |
} |
| 541 |
} |
| 542 |
|
| 543 |
public function parseShapedObjectValue($r, $stringTable, $objectShapeTable) |
| 544 |
{ |
| 545 |
$r->skip('('); |
| 546 |
$shapeId = $this->parseBase62($r); |
| 547 |
if ($shapeId >= count($objectShapeTable)) { |
| 548 |
$r->error('Shape ID '.$shapeId.' out of range'); |
| 549 |
} |
| 550 |
|
| 551 |
$shape = $objectShapeTable[$shapeId]; |
| 552 |
$obj = []; |
| 553 |
foreach ($shape as $key) { |
| 554 |
if ($r->peek() == ',') { |
| 555 |
$r->consume(); |
| 556 |
} |
| 557 |
$obj[$key] = $this->parseValue($r, $stringTable, $objectShapeTable); |
| 558 |
} |
| 559 |
|
| 560 |
$r->skip(')'); |
| 561 |
|
| 562 |
return $obj; |
| 563 |
} |
| 564 |
|
| 565 |
public function parseKeyedObjectValue($r, $stringTable, $objectShapeTable) |
| 566 |
{ |
| 567 |
$r->skip('{'); |
| 568 |
if ($r->peek() == '}') { |
| 569 |
$r->consume(); |
| 570 |
|
| 571 |
return []; |
| 572 |
} |
| 573 |
|
| 574 |
$obj = []; |
| 575 |
while (true) { |
| 576 |
$key = $this->parseObjectKey($r, $stringTable); |
| 577 |
if ($r->peek() == ':') { |
| 578 |
$r->consume(); |
| 579 |
} |
| 580 |
|
| 581 |
$obj[$key] = $this->parseValue($r, $stringTable, $objectShapeTable); |
| 582 |
$ch = $r->peek(); |
| 583 |
if ($ch == ',') { |
| 584 |
$r->consume(); |
| 585 |
} elseif ($ch == '}') { |
| 586 |
$r->consume(); |
| 587 |
|
| 588 |
return $obj; |
| 589 |
} |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
public function parseNumberValue($r) |
| 594 |
{ |
| 595 |
$ch = $r->peek(); |
| 596 |
if ($ch == 'i') { |
| 597 |
$r->consume(); |
| 598 |
|
| 599 |
return $this->parseBase62($r); |
| 600 |
} elseif ($ch == 'I') { |
| 601 |
$r->consume(); |
| 602 |
|
| 603 |
return -$this->parseBase62($r); |
| 604 |
} else { |
| 605 |
return $this->parseFloatValue($r); |
| 606 |
} |
| 607 |
} |
| 608 |
|
| 609 |
public function parseFloatValue($r) |
| 610 |
{ |
| 611 |
// Here, we read the float, but then use custom's float parser, |
| 612 |
// because making a float parser and serializer pair |
| 613 |
// which can round-trip any number is apparently pretty hard |
| 614 |
|
| 615 |
$str = ''; |
| 616 |
|
| 617 |
if (($ch = $r->peek()) == '-') { |
| 618 |
$str .= $ch; |
| 619 |
$r->consume(); |
| 620 |
} |
| 621 |
|
| 622 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 623 |
$str .= $ch; |
| 624 |
$r->consume(); |
| 625 |
} |
| 626 |
|
| 627 |
if ($str == '' || $str == '-') { |
| 628 |
$r->error('Zero-length number in float literal'); |
| 629 |
} |
| 630 |
|
| 631 |
if (($ch = $r->peek()) == '.') { |
| 632 |
$str .= $ch; |
| 633 |
$r->consume(); |
| 634 |
|
| 635 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 636 |
$str .= $ch; |
| 637 |
$r->consume(); |
| 638 |
} |
| 639 |
|
| 640 |
if (substr($str, strlen($str) - 1, 1) == '.') { |
| 641 |
$r->error('Zero-length fractional part in float literal'); |
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
$ch = $r->peek(); |
| 646 |
if ($ch == 'e' || $ch == 'E') { |
| 647 |
$str .= $ch; |
| 648 |
$r->consume(); |
| 649 |
|
| 650 |
$ch = $r->peek(); |
| 651 |
if ($ch == '+' || $ch == '-') { |
| 652 |
$str .= $ch; |
| 653 |
$r->consume(); |
| 654 |
} |
| 655 |
|
| 656 |
while (preg_match('/[0-9]/', $ch = $r->peek())) { |
| 657 |
$str .= $ch; |
| 658 |
$r->consume(); |
| 659 |
} |
| 660 |
|
| 661 |
if (! preg_match('/[0-9]/', substr($str, strlen($str) - 1, 1))) { |
| 662 |
$r->error('Zero-length exponential part in float literal'); |
| 663 |
} |
| 664 |
} |
| 665 |
|
| 666 |
return $this->stringToFloat($str); |
| 667 |
} |
| 668 |
|
| 669 |
public function stringToFloat($str) |
| 670 |
{ |
| 671 |
$isNegative = false; |
| 672 |
if (substr($str, 0, 1) === '-') { |
| 673 |
$isNegative = true; |
| 674 |
$str = substr($str, 1); |
| 675 |
} |
| 676 |
|
| 677 |
$parts = explode('.', $str); |
| 678 |
$decimalLength = isset($parts[1]) ? strlen($parts[1]) : 0; |
| 679 |
|
| 680 |
$floatValue = (float) $str; |
| 681 |
|
| 682 |
$formattedValue = number_format($floatValue, $decimalLength, '.', ''); |
| 683 |
|
| 684 |
return $isNegative ? -1 * $formattedValue : $formattedValue; |
| 685 |
} |
| 686 |
|
| 687 |
public function parseStringValue($r, $stringTable) |
| 688 |
{ |
| 689 |
if ($r->peek() == '"') { |
| 690 |
return $this->parseJsonString($r); |
| 691 |
} else { |
| 692 |
$r->skip('s'); |
| 693 |
$id = $this->parseBase62($r); |
| 694 |
if ($id >= count($stringTable)) { |
| 695 |
$r->error('String ID '.$id.' out of range'); |
| 696 |
} |
| 697 |
|
| 698 |
return $stringTable[$id]; |
| 699 |
} |
| 700 |
} |
| 701 |
} |
| 702 |
|
