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Direktori : /home2/selectio/public_html/fms-worksuite/vendor/amphp/parser/src/ |
Current File : /home2/selectio/public_html/fms-worksuite/vendor/amphp/parser/src/Parser.php |
<?php declare(strict_types=1); namespace Amp\Parser; class Parser { /** @var \Generator<array-key, int|string|null, string, void>|null */ private ?\Generator $generator; /** @var list<string> */ private array $buffers = []; private int $bufferLength = 0; /** @var int|string|null */ private $delimiter; /** * @param \Generator<array-key, int|string|null, string, void> $generator * * @throws InvalidDelimiterError If the generator yields an invalid delimiter. * @throws \Throwable If the generator throws. */ public function __construct(\Generator $generator) { $this->generator = $generator; $this->delimiter = $this->filterDelimiter($this->generator->current()); if (!$this->generator->valid()) { $this->generator = null; } } /** * Cancels the generator parser and returns any remaining data in the internal buffer. Writing data after calling * this method will result in an error. */ final public function cancel(): string { $buffer = \implode($this->buffers); $this->buffers = []; $this->generator = null; return $buffer; } /** * @return bool True if the parser can still receive more data to parse, false if it has ended and calling push * will throw an exception. */ final public function isValid(): bool { return $this->generator !== null; } /** * Adds data to the internal buffer and tries to continue parsing. * * @param string $data Data to append to the internal buffer. * * @throws InvalidDelimiterError If the generator yields an invalid delimiter. * @throws \Error If parsing has already been cancelled. * @throws \Throwable If the generator throws. */ final public function push(string $data): void { if ($this->generator === null) { throw new \Error("The parser is no longer writable"); } $length = \strlen($data); if ($length === 0) { return; } $this->bufferLength += $length; try { do { if (\is_int($this->delimiter) && $this->bufferLength < $this->delimiter) { return; } if (!empty($this->buffers)) { $this->buffers[] = $data; $data = \implode($this->buffers); $this->buffers = []; } if (\is_int($this->delimiter)) { $cutAt = $retainFrom = $this->delimiter; } elseif (\is_string($this->delimiter)) { if (($cutAt = \strpos($data, $this->delimiter)) === false) { return; } $retainFrom = $cutAt + \strlen($this->delimiter); } else { $cutAt = $retainFrom = $this->bufferLength; } if ($this->bufferLength > $cutAt) { $send = \substr($data, 0, $cutAt); $data = \substr($data, $retainFrom); } else { $send = $data; $data = ''; } $this->bufferLength -= $retainFrom; $this->delimiter = $this->filterDelimiter($this->generator->send($send)); if (!$this->generator->valid()) { $this->generator = null; return; } } while ($this->bufferLength); } catch (\Throwable $exception) { $this->generator = null; throw $exception; } finally { if (\strlen($data)) { $this->buffers[] = $data; } } } /** * @param mixed $delimiter Value yielded from Generator. * @return int|string|null */ private function filterDelimiter($delimiter) { \assert($this->generator instanceof \Generator, "Invalid parser state"); if ($delimiter !== null && (!\is_int($delimiter) || $delimiter <= 0) && (!\is_string($delimiter) || !\strlen($delimiter)) ) { throw new InvalidDelimiterError( $this->generator, \sprintf( "Invalid value yielded: Expected NULL, an int greater than 0, or a non-empty string; %s given", \is_object($delimiter) ? \sprintf("instance of %s", \get_class($delimiter)) : \gettype($delimiter), ) ); } return $delimiter; } }