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<?php |
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declare(strict_types=1); |
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namespace Remorhaz\UniLex\Tool\RegExp; |
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use Iterator; |
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use IteratorAggregate; |
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use Remorhaz\UniLex\RegExp\FSM\Range; |
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use SplFileObject; |
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use Throwable; |
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final class PropertiesRangeIterator implements IteratorAggregate |
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{ |
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private $file; |
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private $onProgress; |
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public function __construct(SplFileObject $file, callable $onProgress) |
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{ |
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$this->file = $file; |
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$this->onProgress = $onProgress; |
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} |
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public function getIterator(): Iterator |
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{ |
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while (!$this->file->eof()) { |
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$line = $this->fetchNextLine($this->file); |
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if (!isset($line)) { |
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continue; |
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} |
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yield from $this->fetchPropertyRange($line); |
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($this->onProgress)(strlen($line)); |
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} |
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} |
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private function fetchNextLine(SplFileObject $file): ?string |
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{ |
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$line = $file->fgets(); |
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if (false === $line) { |
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throw new Exception\LineNotReadException($file->getFilename()); |
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} |
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return '' == $line ? null : $line; |
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} |
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private function fetchPropertyRange(string $line): Iterator |
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{ |
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$dataWithComment = explode('#', $line, 2); |
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$data = trim($dataWithComment[0] ?? ''); |
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if ('' == $data) { |
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return null; |
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} |
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$rangeWithProp = explode(';', $data); |
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$unSplitRange = trim($rangeWithProp[0] ?? null); |
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$prop = trim($rangeWithProp[1] ?? null); |
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if (!isset($unSplitRange, $prop)) { |
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throw new Exception\InvalidLineException($line); |
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} |
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$splitRange = explode('..', $unSplitRange); |
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$start = hexdec($splitRange[0]); |
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$finish = isset($splitRange[1]) |
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? hexdec($splitRange[1]) |
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: $start; |
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try { |
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yield $prop => new Range($start, $finish); |
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} catch (Throwable $e) { |
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throw new Exception\RangeNotCreatedException($e); |
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} |
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} |
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} |
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remorhaz /
php-unilex
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