43      * @param string|int $rev empty string or revision timestamp
46     abstract protected function getFilename($rev = '');  argument
65      * @param int $rev timestamp of current page
68     public function isCurrentRevision($rev)  argument
70         return $rev == $this->currentRevision();
76      * @param int $rev revision timestamp
79     public function isLastRevision($rev = null)  argument
81         return $rev === $this->lastRevision();
139      * @param int $rev revision timestamp
157     public function getRevisionInfo($rev, $retrieveCurrentRevInfo = true)  argument
159         $rev = max(0, $rev);
160         if (!$rev) return false;
168         if (isset($this->cache[$this->id][$rev])) {
169             return $this->cache[$this->id][$rev];
173         $result = $this->readloglines($rev);
186         return $this->cache[$this->id][$rev] ?? false;
324      * @param int $rev revision timestamp used as start date
332     public function getRelativeRevision($rev, $direction)  argument
334         $rev = max($rev, 0);
338         if (!$direction || ($direction > 0 && $this->isCurrentRevision($rev))) {
343         $result = $this->readloglines($rev);
368 …        if (($direction > 0 && $info['date'] > $rev) || ($direction < 0 && $info['date'] < $rev)) {
379                 && ($info['date'] == $rev || ($revCounter > 0 && !$relativeRev))
412                 $rev = $rev2;
414                 $rev1 = $rev;
480         } elseif ($rev = $this->getRelativeRevision($date_at + 1, -1)) {
482             return $rev;
495      * @param int $rev revision timestamp
507     protected function retrieveRevisionsAround($rev, $max)  argument
514         $result = $this->readloglines($rev);
527                     if ($info['date'] >= $rev) {
838      * @param int $rev
840     public function traceCurrentRevision($rev)  argument
842         if ($rev > $this->lastRevision()) {
843             $rev = $this->currentRevision();
845         return $rev;