|
public static fromBinary ( string $data, pocketmine\level\format\LevelProvider $provider = null ) : |
||
| $data | string | |
| $provider | pocketmine\level\format\LevelProvider | |
| return | ||
public function readChunk($x, $z, $generate = true, $forward = false)
{
$index = self::getChunkOffset($x, $z);
if ($index < 0 or $index >= 4096) {
//Regenerate chunk due to corruption
$this->locationTable[$index][0] = 0;
$this->locationTable[$index][1] = 1;
}
if (!$this->isChunkGenerated($index)) {
if ($generate === true) {
//Allocate space
$this->locationTable[$index][0] = ++$this->lastSector;
$this->locationTable[$index][1] = 1;
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
fwrite($this->filePointer, str_pad(Binary::writeInt(-1) . chr(self::COMPRESSION_ZLIB), 4096, "", STR_PAD_RIGHT));
$this->writeLocationIndex($index);
} else {
return false;
}
}
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
$length = Binary::readInt(fread($this->filePointer, 4));
$compression = ord(fgetc($this->filePointer));
if ($length <= 0) {
//Not yet generated
$this->generateChunk($x, $z);
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
$length = Binary::readInt(fread($this->filePointer, 4));
$compression = ord(fgetc($this->filePointer));
}
if ($length > $this->locationTable[$index][1] << 12) {
//Invalid chunk, bigger than defined number of sectors
MainLogger::getLogger()->error("Corrupted chunk detected");
$this->locationTable[$index][1] = $length >> 12;
$this->writeLocationIndex($index);
} elseif ($compression !== self::COMPRESSION_ZLIB and $compression !== self::COMPRESSION_GZIP) {
MainLogger::getLogger()->error("Invalid compression type");
return false;
}
$chunk = Chunk::fromBinary(fread($this->filePointer, $length - 1), $this->levelProvider);
if ($chunk instanceof Chunk) {
return $chunk;
} elseif ($forward === false) {
MainLogger::getLogger()->error("Corrupted chunk detected");
$this->generateChunk($x, $z);
return $this->readChunk($x, $z, $generate, true);
} else {
return null;
}
}
protected function unserializeChunk($data)
{
return Chunk::fromBinary($data, $this->levelProvider);
}
public function readChunk($x, $z, $generate = true, $forward = false)
{
$index = self::getChunkOffset($x, $z);
if ($index < 0 or $index >= 4096) {
return null;
}
$this->lastUsed = time();
if (!$this->isChunkGenerated($index)) {
if ($generate === true) {
//Allocate space
$this->locationTable[$index][0] = ++$this->lastSector;
$this->locationTable[$index][1] = 1;
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
fwrite($this->filePointer, str_pad(pack("N", -1) . chr(self::COMPRESSION_ZLIB), 4096, "", STR_PAD_RIGHT));
$this->writeLocationIndex($index);
} else {
return null;
}
}
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
$length = PHP_INT_SIZE === 8 ? unpack("N", fread($this->filePointer, 4))[1] << 32 >> 32 : unpack("N", fread($this->filePointer, 4))[1];
$compression = ord(fgetc($this->filePointer));
if ($length <= 0 or $length >= self::MAX_SECTOR_LENGTH) {
//Not yet generated / corrupted
if ($length >= self::MAX_SECTOR_LENGTH) {
$this->locationTable[$index][0] = ++$this->lastSector;
$this->locationTable[$index][1] = 1;
MainLogger::getLogger()->error("Corrupted chunk header detected");
}
$this->generateChunk($x, $z);
fseek($this->filePointer, $this->locationTable[$index][0] << 12);
$length = PHP_INT_SIZE === 8 ? unpack("N", fread($this->filePointer, 4))[1] << 32 >> 32 : unpack("N", fread($this->filePointer, 4))[1];
$compression = ord(fgetc($this->filePointer));
}
if ($length > $this->locationTable[$index][1] << 12) {
//Invalid chunk, bigger than defined number of sectors
MainLogger::getLogger()->error("Corrupted bigger chunk detected");
$this->locationTable[$index][1] = $length >> 12;
$this->writeLocationIndex($index);
} elseif ($compression !== self::COMPRESSION_ZLIB and $compression !== self::COMPRESSION_GZIP) {
MainLogger::getLogger()->error("Invalid compression type");
return null;
}
$chunk = Chunk::fromBinary(fread($this->filePointer, $length - 1), $this->levelProvider);
if ($chunk instanceof Chunk) {
return $chunk;
} elseif ($forward === false) {
MainLogger::getLogger()->error("Corrupted chunk detected");
$this->generateChunk($x, $z);
return $this->readChunk($x, $z, $generate, true);
} else {
return null;
}
}
