protected function DiffEngine::_lcs_pos in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Component/Diff/Engine/DiffEngine.php \Drupal\Component\Diff\Engine\DiffEngine::_lcs_pos()
2. 10 core/lib/Drupal/Component/Diff/Engine/DiffEngine.php \Drupal\Component\Diff\Engine\DiffEngine::_lcs_pos()

1 call to DiffEngine::_lcs_pos()

DiffEngine::_diag in core/lib/Drupal/Component/Diff/Engine/DiffEngine.php

Divide the Largest Common Subsequence (LCS) of the sequences [XOFF, XLIM) and [YOFF, YLIM) into NCHUNKS approximately equally sized segments.

File

core/lib/Drupal/Component/Diff/Engine/DiffEngine.php, line 243

Class

DiffEngine

Class used internally by Diff to actually compute the diffs.

Namespace

Drupal\Component\Diff\Engine

Code

protected function _lcs_pos($ypos) {
  $end = $this->lcs;
  if ($end == 0 || $ypos > $this->seq[$end]) {
    $this->seq[++$this->lcs] = $ypos;
    $this->in_seq[$ypos] = 1;
    return $this->lcs;
  }
  $beg = 1;
  while ($beg < $end) {
    $mid = (int) (($beg + $end) / 2);
    if ($ypos > $this->seq[$mid]) {
      $beg = $mid + 1;
    }
    else {
      $end = $mid;
    }
  }
  $this::USE_ASSERTS && assert($ypos != $this->seq[$end]);
  $this->in_seq[$this->seq[$end]] = FALSE;
  $this->seq[$end] = $ypos;
  $this->in_seq[$ypos] = 1;
  return $end;
}