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Backport 23954c4cda739190cb79295eeb78859c5c329be0 to 3.5 branch

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Dylan K. Taylor 2018-12-28 23:03:24 +00:00
parent 5ecc5ed7e0
commit 3f5e83a322
1 changed files with 0 additions and 75 deletions
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75
src/pocketmine/level/format/io/region/RegionLoader.php
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@ -198,81 +198,6 @@ class RegionLoader{
}
}
public function doSlowCleanUp() : int{
for($i = 0; $i < 1024; ++$i){
if($this->locationTable[$i][0] === 0 or $this->locationTable[$i][1] === 0){
continue;
}
fseek($this->filePointer, $this->locationTable[$i][0] << 12);
$chunk = fread($this->filePointer, $this->locationTable[$i][1] << 12);
$length = Binary::readInt(substr($chunk, 0, 4));
if($length <= 1){
$this->locationTable[$i] = [0, 0, 0]; //Non-generated chunk, remove it from index
}
try{
$chunk = zlib_decode(substr($chunk, 5));
}catch(\Throwable $e){
$this->locationTable[$i] = [0, 0, 0]; //Corrupted chunk, remove it
continue;
}
$chunk = chr(self::COMPRESSION_ZLIB) . zlib_encode($chunk, ZLIB_ENCODING_DEFLATE, 9);
$chunk = Binary::writeInt(strlen($chunk)) . $chunk;
$sectors = (int) ceil(strlen($chunk) / 4096);
if($sectors > $this->locationTable[$i][1]){
$this->locationTable[$i][0] = $this->lastSector + 1;
$this->lastSector += $sectors;
}
fseek($this->filePointer, $this->locationTable[$i][0] << 12);
fwrite($this->filePointer, str_pad($chunk, $sectors << 12, "\x00", STR_PAD_RIGHT));
}
$this->writeLocationTable();
$n = $this->cleanGarbage();
$this->writeLocationTable();
return $n;
}
private function cleanGarbage() : int{
$sectors = [];
foreach($this->locationTable as $index => $data){ //Calculate file usage
if($data[0] === 0 or $data[1] === 0){
$this->locationTable[$index] = [0, 0, 0];
continue;
}
for($i = 0; $i < $data[1]; ++$i){
$sectors[$data[0]] = $index;
}
}
if(count($sectors) === ($this->lastSector - 2)){ //No collection needed
return 0;
}
ksort($sectors);
$shift = 0;
$lastSector = 1; //First chunk - 1
fseek($this->filePointer, 8192);
$sector = 2;
foreach($sectors as $sector => $index){
if(($sector - $lastSector) > 1){
$shift += $sector - $lastSector - 1;
}
if($shift > 0){
fseek($this->filePointer, $sector << 12);
$old = fread($this->filePointer, 4096);
fseek($this->filePointer, ($sector - $shift) << 12);
fwrite($this->filePointer, $old, 4096);
}
$this->locationTable[$index][0] -= $shift;
$lastSector = $sector;
}
ftruncate($this->filePointer, ($sector + 1) << 12); //Truncate to the end of file written
return $shift;
}
protected function loadLocationTable(){
fseek($this->filePointer, 0);
$this->lastSector = 1;