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/vendor/symfony/yaml/ -> Inline.php (source)

   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Yaml;
  13  
  14  use Symfony\Component\Yaml\Exception\DumpException;
  15  use Symfony\Component\Yaml\Exception\ParseException;
  16  use Symfony\Component\Yaml\Tag\TaggedValue;
  17  
  18  /**
  19   * Inline implements a YAML parser/dumper for the YAML inline syntax.
  20   *
  21   * @author Fabien Potencier <fabien@symfony.com>
  22   *
  23   * @internal
  24   */
  25  class Inline
  26  {
  27      const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
  28  
  29      public static $parsedLineNumber = -1;
  30      public static $parsedFilename;
  31  
  32      private static $exceptionOnInvalidType = false;
  33      private static $objectSupport = false;
  34      private static $objectForMap = false;
  35      private static $constantSupport = false;
  36  
  37      /**
  38       * @param int         $flags
  39       * @param int|null    $parsedLineNumber
  40       * @param string|null $parsedFilename
  41       */
  42      public static function initialize($flags, $parsedLineNumber = null, $parsedFilename = null)
  43      {
  44          self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
  45          self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
  46          self::$objectForMap = (bool) (Yaml::PARSE_OBJECT_FOR_MAP & $flags);
  47          self::$constantSupport = (bool) (Yaml::PARSE_CONSTANT & $flags);
  48          self::$parsedFilename = $parsedFilename;
  49  
  50          if (null !== $parsedLineNumber) {
  51              self::$parsedLineNumber = $parsedLineNumber;
  52          }
  53      }
  54  
  55      /**
  56       * Converts a YAML string to a PHP value.
  57       *
  58       * @param string $value      A YAML string
  59       * @param int    $flags      A bit field of PARSE_* constants to customize the YAML parser behavior
  60       * @param array  $references Mapping of variable names to values
  61       *
  62       * @return mixed A PHP value
  63       *
  64       * @throws ParseException
  65       */
  66      public static function parse($value, $flags = 0, $references = [])
  67      {
  68          if (\is_bool($flags)) {
  69              @trigger_error('Passing a boolean flag to toggle exception handling is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE flag instead.', \E_USER_DEPRECATED);
  70  
  71              if ($flags) {
  72                  $flags = Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE;
  73              } else {
  74                  $flags = 0;
  75              }
  76          }
  77  
  78          if (\func_num_args() >= 3 && !\is_array($references)) {
  79              @trigger_error('Passing a boolean flag to toggle object support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT flag instead.', \E_USER_DEPRECATED);
  80  
  81              if ($references) {
  82                  $flags |= Yaml::PARSE_OBJECT;
  83              }
  84  
  85              if (\func_num_args() >= 4) {
  86                  @trigger_error('Passing a boolean flag to toggle object for map support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT_FOR_MAP flag instead.', \E_USER_DEPRECATED);
  87  
  88                  if (func_get_arg(3)) {
  89                      $flags |= Yaml::PARSE_OBJECT_FOR_MAP;
  90                  }
  91              }
  92  
  93              if (\func_num_args() >= 5) {
  94                  $references = func_get_arg(4);
  95              } else {
  96                  $references = [];
  97              }
  98          }
  99  
 100          self::initialize($flags);
 101  
 102          $value = trim($value);
 103  
 104          if ('' === $value) {
 105              return '';
 106          }
 107  
 108          if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
 109              $mbEncoding = mb_internal_encoding();
 110              mb_internal_encoding('ASCII');
 111          }
 112  
 113          try {
 114              $i = 0;
 115              $tag = self::parseTag($value, $i, $flags);
 116              switch ($value[$i]) {
 117                  case '[':
 118                      $result = self::parseSequence($value, $flags, $i, $references);
 119                      ++$i;
 120                      break;
 121                  case '{':
 122                      $result = self::parseMapping($value, $flags, $i, $references);
 123                      ++$i;
 124                      break;
 125                  default:
 126                      $result = self::parseScalar($value, $flags, null, $i, null === $tag, $references);
 127              }
 128  
 129              // some comments are allowed at the end
 130              if (preg_replace('/\s*#.*$/A', '', substr($value, $i))) {
 131                  throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
 132              }
 133  
 134              if (null !== $tag) {
 135                  return new TaggedValue($tag, $result);
 136              }
 137  
 138              return $result;
 139          } finally {
 140              if (isset($mbEncoding)) {
 141                  mb_internal_encoding($mbEncoding);
 142              }
 143          }
 144      }
 145  
 146      /**
 147       * Dumps a given PHP variable to a YAML string.
 148       *
 149       * @param mixed $value The PHP variable to convert
 150       * @param int   $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
 151       *
 152       * @return string The YAML string representing the PHP value
 153       *
 154       * @throws DumpException When trying to dump PHP resource
 155       */
 156      public static function dump($value, $flags = 0)
 157      {
 158          if (\is_bool($flags)) {
 159              @trigger_error('Passing a boolean flag to toggle exception handling is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE flag instead.', \E_USER_DEPRECATED);
 160  
 161              if ($flags) {
 162                  $flags = Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE;
 163              } else {
 164                  $flags = 0;
 165              }
 166          }
 167  
 168          if (\func_num_args() >= 3) {
 169              @trigger_error('Passing a boolean flag to toggle object support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::DUMP_OBJECT flag instead.', \E_USER_DEPRECATED);
 170  
 171              if (func_get_arg(2)) {
 172                  $flags |= Yaml::DUMP_OBJECT;
 173              }
 174          }
 175  
 176          switch (true) {
 177              case \is_resource($value):
 178                  if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
 179                      throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
 180                  }
 181  
 182                  return 'null';
 183              case $value instanceof \DateTimeInterface:
 184                  return $value->format('c');
 185              case \is_object($value):
 186                  if ($value instanceof TaggedValue) {
 187                      return '!'.$value->getTag().' '.self::dump($value->getValue(), $flags);
 188                  }
 189  
 190                  if (Yaml::DUMP_OBJECT & $flags) {
 191                      return '!php/object '.self::dump(serialize($value));
 192                  }
 193  
 194                  if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
 195                      return self::dumpArray($value, $flags & ~Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE);
 196                  }
 197  
 198                  if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
 199                      throw new DumpException('Object support when dumping a YAML file has been disabled.');
 200                  }
 201  
 202                  return 'null';
 203              case \is_array($value):
 204                  return self::dumpArray($value, $flags);
 205              case null === $value:
 206                  return 'null';
 207              case true === $value:
 208                  return 'true';
 209              case false === $value:
 210                  return 'false';
 211              case ctype_digit($value):
 212                  return \is_string($value) ? "'$value'" : (int) $value;
 213              case is_numeric($value) && false === strpos($value, "\f") && false === strpos($value, "\n") && false === strpos($value, "\r") && false === strpos($value, "\t") && false === strpos($value, "\v"):
 214                  $locale = setlocale(\LC_NUMERIC, 0);
 215                  if (false !== $locale) {
 216                      setlocale(\LC_NUMERIC, 'C');
 217                  }
 218                  if (\is_float($value)) {
 219                      $repr = (string) $value;
 220                      if (is_infinite($value)) {
 221                          $repr = str_ireplace('INF', '.Inf', $repr);
 222                      } elseif (floor($value) == $value && $repr == $value) {
 223                          // Preserve float data type since storing a whole number will result in integer value.
 224                          $repr = '!!float '.$repr;
 225                      }
 226                  } else {
 227                      $repr = \is_string($value) ? "'$value'" : (string) $value;
 228                  }
 229                  if (false !== $locale) {
 230                      setlocale(\LC_NUMERIC, $locale);
 231                  }
 232  
 233                  return $repr;
 234              case '' == $value:
 235                  return "''";
 236              case self::isBinaryString($value):
 237                  return '!!binary '.base64_encode($value);
 238              case Escaper::requiresDoubleQuoting($value):
 239                  return Escaper::escapeWithDoubleQuotes($value);
 240              case Escaper::requiresSingleQuoting($value):
 241              case Parser::preg_match('{^[0-9]+[_0-9]*$}', $value):
 242              case Parser::preg_match(self::getHexRegex(), $value):
 243              case Parser::preg_match(self::getTimestampRegex(), $value):
 244                  return Escaper::escapeWithSingleQuotes($value);
 245              default:
 246                  return $value;
 247          }
 248      }
 249  
 250      /**
 251       * Check if given array is hash or just normal indexed array.
 252       *
 253       * @internal
 254       *
 255       * @param array|\ArrayObject|\stdClass $value The PHP array or array-like object to check
 256       *
 257       * @return bool true if value is hash array, false otherwise
 258       */
 259      public static function isHash($value)
 260      {
 261          if ($value instanceof \stdClass || $value instanceof \ArrayObject) {
 262              return true;
 263          }
 264  
 265          $expectedKey = 0;
 266  
 267          foreach ($value as $key => $val) {
 268              if ($key !== $expectedKey++) {
 269                  return true;
 270              }
 271          }
 272  
 273          return false;
 274      }
 275  
 276      /**
 277       * Dumps a PHP array to a YAML string.
 278       *
 279       * @param array $value The PHP array to dump
 280       * @param int   $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
 281       *
 282       * @return string The YAML string representing the PHP array
 283       */
 284      private static function dumpArray($value, $flags)
 285      {
 286          // array
 287          if (($value || Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE & $flags) && !self::isHash($value)) {
 288              $output = [];
 289              foreach ($value as $val) {
 290                  $output[] = self::dump($val, $flags);
 291              }
 292  
 293              return sprintf('[%s]', implode(', ', $output));
 294          }
 295  
 296          // hash
 297          $output = [];
 298          foreach ($value as $key => $val) {
 299              $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
 300          }
 301  
 302          return sprintf('{ %s }', implode(', ', $output));
 303      }
 304  
 305      /**
 306       * Parses a YAML scalar.
 307       *
 308       * @param string   $scalar
 309       * @param int      $flags
 310       * @param string[] $delimiters
 311       * @param int      &$i
 312       * @param bool     $evaluate
 313       * @param array    $references
 314       *
 315       * @return string
 316       *
 317       * @throws ParseException When malformed inline YAML string is parsed
 318       *
 319       * @internal
 320       */
 321      public static function parseScalar($scalar, $flags = 0, $delimiters = null, &$i = 0, $evaluate = true, $references = [], $legacyOmittedKeySupport = false)
 322      {
 323          if (\in_array($scalar[$i], ['"', "'"])) {
 324              // quoted scalar
 325              $output = self::parseQuotedScalar($scalar, $i);
 326  
 327              if (null !== $delimiters) {
 328                  $tmp = ltrim(substr($scalar, $i), ' ');
 329                  if ('' === $tmp) {
 330                      throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode('', $delimiters)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 331                  }
 332                  if (!\in_array($tmp[0], $delimiters)) {
 333                      throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 334                  }
 335              }
 336          } else {
 337              // "normal" string
 338              if (!$delimiters) {
 339                  $output = substr($scalar, $i);
 340                  $i += \strlen($output);
 341  
 342                  // remove comments
 343                  if (Parser::preg_match('/[ \t]+#/', $output, $match, \PREG_OFFSET_CAPTURE)) {
 344                      $output = substr($output, 0, $match[0][1]);
 345                  }
 346              } elseif (Parser::preg_match('/^(.'.($legacyOmittedKeySupport ? '+' : '*').'?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
 347                  $output = $match[1];
 348                  $i += \strlen($output);
 349              } else {
 350                  throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $scalar), self::$parsedLineNumber + 1, null, self::$parsedFilename);
 351              }
 352  
 353              // a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
 354              if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0])) {
 355                  throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]), self::$parsedLineNumber + 1, $output, self::$parsedFilename);
 356              }
 357  
 358              if ($output && '%' === $output[0]) {
 359                  @trigger_error(self::getDeprecationMessage(sprintf('Not quoting the scalar "%s" starting with the "%%" indicator character is deprecated since Symfony 3.1 and will throw a ParseException in 4.0.', $output)), \E_USER_DEPRECATED);
 360              }
 361  
 362              if ($evaluate) {
 363                  $output = self::evaluateScalar($output, $flags, $references);
 364              }
 365          }
 366  
 367          return $output;
 368      }
 369  
 370      /**
 371       * Parses a YAML quoted scalar.
 372       *
 373       * @param string $scalar
 374       * @param int    &$i
 375       *
 376       * @return string
 377       *
 378       * @throws ParseException When malformed inline YAML string is parsed
 379       */
 380      private static function parseQuotedScalar($scalar, &$i)
 381      {
 382          if (!Parser::preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
 383              throw new ParseException(sprintf('Malformed inline YAML string: "%s".', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 384          }
 385  
 386          $output = substr($match[0], 1, \strlen($match[0]) - 2);
 387  
 388          $unescaper = new Unescaper();
 389          if ('"' == $scalar[$i]) {
 390              $output = $unescaper->unescapeDoubleQuotedString($output);
 391          } else {
 392              $output = $unescaper->unescapeSingleQuotedString($output);
 393          }
 394  
 395          $i += \strlen($match[0]);
 396  
 397          return $output;
 398      }
 399  
 400      /**
 401       * Parses a YAML sequence.
 402       *
 403       * @param string $sequence
 404       * @param int    $flags
 405       * @param int    &$i
 406       * @param array  $references
 407       *
 408       * @return array
 409       *
 410       * @throws ParseException When malformed inline YAML string is parsed
 411       */
 412      private static function parseSequence($sequence, $flags, &$i = 0, $references = [])
 413      {
 414          $output = [];
 415          $len = \strlen($sequence);
 416          ++$i;
 417  
 418          // [foo, bar, ...]
 419          while ($i < $len) {
 420              if (']' === $sequence[$i]) {
 421                  return $output;
 422              }
 423              if (',' === $sequence[$i] || ' ' === $sequence[$i]) {
 424                  ++$i;
 425  
 426                  continue;
 427              }
 428  
 429              $tag = self::parseTag($sequence, $i, $flags);
 430              switch ($sequence[$i]) {
 431                  case '[':
 432                      // nested sequence
 433                      $value = self::parseSequence($sequence, $flags, $i, $references);
 434                      break;
 435                  case '{':
 436                      // nested mapping
 437                      $value = self::parseMapping($sequence, $flags, $i, $references);
 438                      break;
 439                  default:
 440                      $isQuoted = \in_array($sequence[$i], ['"', "'"]);
 441                      $value = self::parseScalar($sequence, $flags, [',', ']'], $i, null === $tag, $references);
 442  
 443                      // the value can be an array if a reference has been resolved to an array var
 444                      if (\is_string($value) && !$isQuoted && false !== strpos($value, ': ')) {
 445                          // embedded mapping?
 446                          try {
 447                              $pos = 0;
 448                              $value = self::parseMapping('{'.$value.'}', $flags, $pos, $references);
 449                          } catch (\InvalidArgumentException $e) {
 450                              // no, it's not
 451                          }
 452                      }
 453  
 454                      --$i;
 455              }
 456  
 457              if (null !== $tag) {
 458                  $value = new TaggedValue($tag, $value);
 459              }
 460  
 461              $output[] = $value;
 462  
 463              ++$i;
 464          }
 465  
 466          throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $sequence), self::$parsedLineNumber + 1, null, self::$parsedFilename);
 467      }
 468  
 469      /**
 470       * Parses a YAML mapping.
 471       *
 472       * @param string $mapping
 473       * @param int    $flags
 474       * @param int    &$i
 475       * @param array  $references
 476       *
 477       * @return array|\stdClass
 478       *
 479       * @throws ParseException When malformed inline YAML string is parsed
 480       */
 481      private static function parseMapping($mapping, $flags, &$i = 0, $references = [])
 482      {
 483          $output = [];
 484          $len = \strlen($mapping);
 485          ++$i;
 486          $allowOverwrite = false;
 487  
 488          // {foo: bar, bar:foo, ...}
 489          while ($i < $len) {
 490              switch ($mapping[$i]) {
 491                  case ' ':
 492                  case ',':
 493                      ++$i;
 494                      continue 2;
 495                  case '}':
 496                      if (self::$objectForMap) {
 497                          return (object) $output;
 498                      }
 499  
 500                      return $output;
 501              }
 502  
 503              // key
 504              $isKeyQuoted = \in_array($mapping[$i], ['"', "'"], true);
 505              $key = self::parseScalar($mapping, $flags, [':', ' '], $i, false, [], true);
 506  
 507              if ('!php/const' === $key) {
 508                  $key .= self::parseScalar($mapping, $flags, [':', ' '], $i, false, [], true);
 509                  if ('!php/const:' === $key && ':' !== $mapping[$i]) {
 510                      $key = '';
 511                      --$i;
 512                  } else {
 513                      $key = self::evaluateScalar($key, $flags);
 514                  }
 515              }
 516  
 517              if (':' !== $key && false === $i = strpos($mapping, ':', $i)) {
 518                  break;
 519              }
 520  
 521              if (':' === $key) {
 522                  @trigger_error(self::getDeprecationMessage('Omitting the key of a mapping is deprecated and will throw a ParseException in 4.0.'), \E_USER_DEPRECATED);
 523              }
 524  
 525              if (!$isKeyQuoted) {
 526                  $evaluatedKey = self::evaluateScalar($key, $flags, $references);
 527  
 528                  if ('' !== $key && $evaluatedKey !== $key && !\is_string($evaluatedKey) && !\is_int($evaluatedKey)) {
 529                      @trigger_error(self::getDeprecationMessage('Implicit casting of incompatible mapping keys to strings is deprecated since Symfony 3.3 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0. Quote your evaluable mapping keys instead.'), \E_USER_DEPRECATED);
 530                  }
 531              }
 532  
 533              if (':' !== $key && !$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], [' ', ',', '[', ']', '{', '}'], true))) {
 534                  @trigger_error(self::getDeprecationMessage('Using a colon after an unquoted mapping key that is not followed by an indication character (i.e. " ", ",", "[", "]", "{", "}") is deprecated since Symfony 3.2 and will throw a ParseException in 4.0.'), \E_USER_DEPRECATED);
 535              }
 536  
 537              if ('<<' === $key) {
 538                  $allowOverwrite = true;
 539              }
 540  
 541              while ($i < $len) {
 542                  if (':' === $mapping[$i] || ' ' === $mapping[$i]) {
 543                      ++$i;
 544  
 545                      continue;
 546                  }
 547  
 548                  $tag = self::parseTag($mapping, $i, $flags);
 549                  switch ($mapping[$i]) {
 550                      case '[':
 551                          // nested sequence
 552                          $value = self::parseSequence($mapping, $flags, $i, $references);
 553                          // Spec: Keys MUST be unique; first one wins.
 554                          // Parser cannot abort this mapping earlier, since lines
 555                          // are processed sequentially.
 556                          // But overwriting is allowed when a merge node is used in current block.
 557                          if ('<<' === $key) {
 558                              foreach ($value as $parsedValue) {
 559                                  $output += $parsedValue;
 560                              }
 561                          } elseif ($allowOverwrite || !isset($output[$key])) {
 562                              if (null !== $tag) {
 563                                  $output[$key] = new TaggedValue($tag, $value);
 564                              } else {
 565                                  $output[$key] = $value;
 566                              }
 567                          } elseif (isset($output[$key])) {
 568                              @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
 569                          }
 570                          break;
 571                      case '{':
 572                          // nested mapping
 573                          $value = self::parseMapping($mapping, $flags, $i, $references);
 574                          // Spec: Keys MUST be unique; first one wins.
 575                          // Parser cannot abort this mapping earlier, since lines
 576                          // are processed sequentially.
 577                          // But overwriting is allowed when a merge node is used in current block.
 578                          if ('<<' === $key) {
 579                              $output += $value;
 580                          } elseif ($allowOverwrite || !isset($output[$key])) {
 581                              if (null !== $tag) {
 582                                  $output[$key] = new TaggedValue($tag, $value);
 583                              } else {
 584                                  $output[$key] = $value;
 585                              }
 586                          } elseif (isset($output[$key])) {
 587                              @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
 588                          }
 589                          break;
 590                      default:
 591                          $value = self::parseScalar($mapping, $flags, [',', '}'], $i, null === $tag, $references);
 592                          // Spec: Keys MUST be unique; first one wins.
 593                          // Parser cannot abort this mapping earlier, since lines
 594                          // are processed sequentially.
 595                          // But overwriting is allowed when a merge node is used in current block.
 596                          if ('<<' === $key) {
 597                              $output += $value;
 598                          } elseif ($allowOverwrite || !isset($output[$key])) {
 599                              if (null !== $tag) {
 600                                  $output[$key] = new TaggedValue($tag, $value);
 601                              } else {
 602                                  $output[$key] = $value;
 603                              }
 604                          } elseif (isset($output[$key])) {
 605                              @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
 606                          }
 607                          --$i;
 608                  }
 609                  ++$i;
 610  
 611                  continue 2;
 612              }
 613          }
 614  
 615          throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $mapping), self::$parsedLineNumber + 1, null, self::$parsedFilename);
 616      }
 617  
 618      /**
 619       * Evaluates scalars and replaces magic values.
 620       *
 621       * @param string $scalar
 622       * @param int    $flags
 623       * @param array  $references
 624       *
 625       * @return mixed The evaluated YAML string
 626       *
 627       * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
 628       */
 629      private static function evaluateScalar($scalar, $flags, $references = [])
 630      {
 631          $scalar = trim($scalar);
 632          $scalarLower = strtolower($scalar);
 633  
 634          if (0 === strpos($scalar, '*')) {
 635              if (false !== $pos = strpos($scalar, '#')) {
 636                  $value = substr($scalar, 1, $pos - 2);
 637              } else {
 638                  $value = substr($scalar, 1);
 639              }
 640  
 641              // an unquoted *
 642              if (false === $value || '' === $value) {
 643                  throw new ParseException('A reference must contain at least one character.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
 644              }
 645  
 646              if (!\array_key_exists($value, $references)) {
 647                  throw new ParseException(sprintf('Reference "%s" does not exist.', $value), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
 648              }
 649  
 650              return $references[$value];
 651          }
 652  
 653          switch (true) {
 654              case 'null' === $scalarLower:
 655              case '' === $scalar:
 656              case '~' === $scalar:
 657                  return null;
 658              case 'true' === $scalarLower:
 659                  return true;
 660              case 'false' === $scalarLower:
 661                  return false;
 662              case '!' === $scalar[0]:
 663                  switch (true) {
 664                      case 0 === strpos($scalar, '!str'):
 665                          @trigger_error(self::getDeprecationMessage('Support for the !str tag is deprecated since Symfony 3.4. Use the !!str tag instead.'), \E_USER_DEPRECATED);
 666  
 667                          return (string) substr($scalar, 5);
 668                      case 0 === strpos($scalar, '!!str '):
 669                          return (string) substr($scalar, 6);
 670                      case 0 === strpos($scalar, '! '):
 671                          @trigger_error(self::getDeprecationMessage('Using the non-specific tag "!" is deprecated since Symfony 3.4 as its behavior will change in 4.0. It will force non-evaluating your values in 4.0. Use plain integers or !!float instead.'), \E_USER_DEPRECATED);
 672  
 673                          return (int) self::parseScalar(substr($scalar, 2), $flags);
 674                      case 0 === strpos($scalar, '!php/object:'):
 675                          if (self::$objectSupport) {
 676                              @trigger_error(self::getDeprecationMessage('The !php/object: tag to indicate dumped PHP objects is deprecated since Symfony 3.4 and will be removed in 4.0. Use the !php/object (without the colon) tag instead.'), \E_USER_DEPRECATED);
 677  
 678                              return unserialize(substr($scalar, 12));
 679                          }
 680  
 681                          if (self::$exceptionOnInvalidType) {
 682                              throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 683                          }
 684  
 685                          return null;
 686                      case 0 === strpos($scalar, '!!php/object:'):
 687                          if (self::$objectSupport) {
 688                              @trigger_error(self::getDeprecationMessage('The !!php/object: tag to indicate dumped PHP objects is deprecated since Symfony 3.1 and will be removed in 4.0. Use the !php/object (without the colon) tag instead.'), \E_USER_DEPRECATED);
 689  
 690                              return unserialize(substr($scalar, 13));
 691                          }
 692  
 693                          if (self::$exceptionOnInvalidType) {
 694                              throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 695                          }
 696  
 697                          return null;
 698                      case 0 === strpos($scalar, '!php/object'):
 699                          if (self::$objectSupport) {
 700                              if (!isset($scalar[12])) {
 701                                  return false;
 702                              }
 703  
 704                              return unserialize(self::parseScalar(substr($scalar, 12)));
 705                          }
 706  
 707                          if (self::$exceptionOnInvalidType) {
 708                              throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 709                          }
 710  
 711                          return null;
 712                      case 0 === strpos($scalar, '!php/const:'):
 713                          if (self::$constantSupport) {
 714                              @trigger_error(self::getDeprecationMessage('The !php/const: tag to indicate dumped PHP constants is deprecated since Symfony 3.4 and will be removed in 4.0. Use the !php/const (without the colon) tag instead.'), \E_USER_DEPRECATED);
 715  
 716                              if (\defined($const = substr($scalar, 11))) {
 717                                  return \constant($const);
 718                              }
 719  
 720                              throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 721                          }
 722                          if (self::$exceptionOnInvalidType) {
 723                              throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 724                          }
 725  
 726                          return null;
 727                      case 0 === strpos($scalar, '!php/const'):
 728                          if (self::$constantSupport) {
 729                              if (!isset($scalar[11])) {
 730                                  return '';
 731                              }
 732  
 733                              $i = 0;
 734                              if (\defined($const = self::parseScalar(substr($scalar, 11), 0, null, $i, false))) {
 735                                  return \constant($const);
 736                              }
 737  
 738                              throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 739                          }
 740                          if (self::$exceptionOnInvalidType) {
 741                              throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 742                          }
 743  
 744                          return null;
 745                      case 0 === strpos($scalar, '!!float '):
 746                          return (float) substr($scalar, 8);
 747                      case 0 === strpos($scalar, '!!binary '):
 748                          return self::evaluateBinaryScalar(substr($scalar, 9));
 749                      default:
 750                          @trigger_error(self::getDeprecationMessage(sprintf('Using the unquoted scalar value "%s" is deprecated since Symfony 3.3 and will be considered as a tagged value in 4.0. You must quote it.', $scalar)), \E_USER_DEPRECATED);
 751                  }
 752  
 753              // Optimize for returning strings.
 754              // no break
 755              case '+' === $scalar[0] || '-' === $scalar[0] || '.' === $scalar[0] || is_numeric($scalar[0]):
 756                  if (Parser::preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar)) {
 757                      $scalar = str_replace('_', '', (string) $scalar);
 758                  }
 759  
 760                  switch (true) {
 761                      case ctype_digit($scalar):
 762                          if (preg_match('/^0[0-7]+$/', $scalar)) {
 763                              return octdec($scalar);
 764                          }
 765  
 766                          $cast = (int) $scalar;
 767  
 768                          return ($scalar === (string) $cast) ? $cast : $scalar;
 769                      case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
 770                          if (preg_match('/^-0[0-7]+$/', $scalar)) {
 771                              return -octdec(substr($scalar, 1));
 772                          }
 773  
 774                          $cast = (int) $scalar;
 775  
 776                          return ($scalar === (string) $cast) ? $cast : $scalar;
 777                      case is_numeric($scalar):
 778                      case Parser::preg_match(self::getHexRegex(), $scalar):
 779                          $scalar = str_replace('_', '', $scalar);
 780  
 781                          return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
 782                      case '.inf' === $scalarLower:
 783                      case '.nan' === $scalarLower:
 784                          return -log(0);
 785                      case '-.inf' === $scalarLower:
 786                          return log(0);
 787                      case Parser::preg_match('/^(-|\+)?[0-9][0-9,]*(\.[0-9_]+)?$/', $scalar):
 788                      case Parser::preg_match('/^(-|\+)?[0-9][0-9_]*(\.[0-9_]+)?$/', $scalar):
 789                          if (false !== strpos($scalar, ',')) {
 790                              @trigger_error(self::getDeprecationMessage('Using the comma as a group separator for floats is deprecated since Symfony 3.2 and will be removed in 4.0.'), \E_USER_DEPRECATED);
 791                          }
 792  
 793                          return (float) str_replace([',', '_'], '', $scalar);
 794                      case Parser::preg_match(self::getTimestampRegex(), $scalar):
 795                          if (Yaml::PARSE_DATETIME & $flags) {
 796                              // When no timezone is provided in the parsed date, YAML spec says we must assume UTC.
 797                              return new \DateTime($scalar, new \DateTimeZone('UTC'));
 798                          }
 799  
 800                          $timeZone = date_default_timezone_get();
 801                          date_default_timezone_set('UTC');
 802                          $time = strtotime($scalar);
 803                          date_default_timezone_set($timeZone);
 804  
 805                          return $time;
 806                  }
 807          }
 808  
 809          return (string) $scalar;
 810      }
 811  
 812      /**
 813       * @param string $value
 814       * @param int    &$i
 815       * @param int    $flags
 816       *
 817       * @return string|null
 818       */
 819      private static function parseTag($value, &$i, $flags)
 820      {
 821          if ('!' !== $value[$i]) {
 822              return null;
 823          }
 824  
 825          $tagLength = strcspn($value, " \t\n", $i + 1);
 826          $tag = substr($value, $i + 1, $tagLength);
 827  
 828          $nextOffset = $i + $tagLength + 1;
 829          $nextOffset += strspn($value, ' ', $nextOffset);
 830  
 831          // Is followed by a scalar
 832          if ((!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], ['[', '{'], true)) && 'tagged' !== $tag) {
 833              // Manage non-whitelisted scalars in {@link self::evaluateScalar()}
 834              return null;
 835          }
 836  
 837          // Built-in tags
 838          if ($tag && '!' === $tag[0]) {
 839              throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
 840          }
 841  
 842          if (Yaml::PARSE_CUSTOM_TAGS & $flags) {
 843              $i = $nextOffset;
 844  
 845              return $tag;
 846          }
 847  
 848          throw new ParseException(sprintf('Tags support is not enabled. Enable the `Yaml::PARSE_CUSTOM_TAGS` flag to use "!%s".', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
 849      }
 850  
 851      /**
 852       * @param string $scalar
 853       *
 854       * @return string
 855       *
 856       * @internal
 857       */
 858      public static function evaluateBinaryScalar($scalar)
 859      {
 860          $parsedBinaryData = self::parseScalar(preg_replace('/\s/', '', $scalar));
 861  
 862          if (0 !== (\strlen($parsedBinaryData) % 4)) {
 863              throw new ParseException(sprintf('The normalized base64 encoded data (data without whitespace characters) length must be a multiple of four (%d bytes given).', \strlen($parsedBinaryData)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 864          }
 865  
 866          if (!Parser::preg_match('#^[A-Z0-9+/]+={0,2}$#i', $parsedBinaryData)) {
 867              throw new ParseException(sprintf('The base64 encoded data (%s) contains invalid characters.', $parsedBinaryData), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
 868          }
 869  
 870          return base64_decode($parsedBinaryData, true);
 871      }
 872  
 873      private static function isBinaryString($value)
 874      {
 875          return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
 876      }
 877  
 878      /**
 879       * Gets a regex that matches a YAML date.
 880       *
 881       * @return string The regular expression
 882       *
 883       * @see http://www.yaml.org/spec/1.2/spec.html#id2761573
 884       */
 885      private static function getTimestampRegex()
 886      {
 887          return <<<EOF
 888          ~^
 889          (?P<year>[0-9][0-9][0-9][0-9])
 890          -(?P<month>[0-9][0-9]?)
 891          -(?P<day>[0-9][0-9]?)
 892          (?:(?:[Tt]|[ \t]+)
 893          (?P<hour>[0-9][0-9]?)
 894          :(?P<minute>[0-9][0-9])
 895          :(?P<second>[0-9][0-9])
 896          (?:\.(?P<fraction>[0-9]*))?
 897          (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
 898          (?::(?P<tz_minute>[0-9][0-9]))?))?)?
 899          $~x
 900  EOF;
 901      }
 902  
 903      /**
 904       * Gets a regex that matches a YAML number in hexadecimal notation.
 905       *
 906       * @return string
 907       */
 908      private static function getHexRegex()
 909      {
 910          return '~^0x[0-9a-f_]++$~i';
 911      }
 912  
 913      private static function getDeprecationMessage($message)
 914      {
 915          $message = rtrim($message, '.');
 916  
 917          if (null !== self::$parsedFilename) {
 918              $message .= ' in '.self::$parsedFilename;
 919          }
 920  
 921          if (-1 !== self::$parsedLineNumber) {
 922              $message .= ' on line '.(self::$parsedLineNumber + 1);
 923          }
 924  
 925          return $message.'.';
 926      }
 927  }


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