def _readChunk(self, cx, cz):
cx &= 0x1f
cz &= 0x1f
offset = self.getOffset(cx, cz)
if offset == 0:
raise ChunkNotPresent((cx, cz))
sectorStart = offset >> 8
numSectors = offset & 0xff
if numSectors == 0:
raise ChunkNotPresent((cx, cz))
if sectorStart + numSectors > len(self.freeSectors):
raise ChunkNotPresent((cx, cz))
with self.file as f:
f.seek(sectorStart * self.SECTOR_BYTES)
data = f.read(numSectors * self.SECTOR_BYTES)
if len(data) < 5:
raise RegionMalformed("Chunk data is only %d bytes long (expected 5)" % len(data))
# log.debug("REGION LOAD {0},{1} sector {2}".format(cx, cz, sectorStart))
length = struct.unpack_from(">I", data)[0]
format = struct.unpack_from("B", data, 4)[0]
data = data[5:length + 5]
return data, format
def loadChunk(self, cx, cz, world):
data = self._readChunk(cx, cz)
if data is None:
raise ChunkNotPresent((cx, cz, self))
chunk = PocketChunk(cx, cz, data[4:], world)
return chunk
def copyChunkAtPosition(self, tempWorld, level, cx, cz):
if level.containsChunk(cx, cz):
return
try:
tempChunkBytes = tempWorld._getChunkBytes(cx, cz)
except ChunkNotPresent, e:
raise ChunkNotPresent(
"While generating a world in {0} using server {1} ({2!r})".
format(tempWorld, self.serverJarFile, e),
sys.exc_info()[2])
def getChunk(self, cx, cz):
for p in cx, cz:
if not 0 <= p <= 31:
raise ChunkNotPresent((cx, cz, self))
c = self._loadedChunks.get((cx, cz))
if c is None:
c = self.chunkFile.loadChunk(cx, cz, self)
self._loadedChunks[cx, cz] = c
return c
def copyChunkAtPosition(self, tempWorld, level, cx, cz):
if level.containsChunk(cx, cz):
return
try:
tempChunkBytes = tempWorld._getChunkBytes(cx, cz)
except ChunkNotPresent as e:
raise ChunkNotPresent("While generating a world in {0} using server {1} ({2!r})".format(tempWorld, self.serverJarFile, e)).with_traceback(sys.exc_info()[2])
level.worldFolder.saveChunk(cx, cz, tempChunkBytes)
level._allChunks = None
def loadChunk(self, cx, cz, world):
"""
:param cx, cz: int Coordinates of the chunk
:param world: PocketLeveldbWorld
:return: PocketLeveldbChunk
"""
data = self._readChunk(cx, cz)
if data is None:
raise ChunkNotPresent((cx, cz, self))
chunk = PocketLeveldbChunk(cx, cz, world, data)
return chunk
def copyChunkAtPosition(self, tempWorld, level, cx, cz):
if level.containsChunk(cx, cz):
return
try:
tempChunkBytes = tempWorld._getChunkBytes(cx, cz)
except ChunkNotPresent as e:
raise ChunkNotPresent("While generating a world in {0} using server {1} ({2!r})".format(tempWorld,
self.serverJarFile,
e), sys.exc_info()[
2])
if isinstance(level, PocketLeveldbWorld):
level.saveGeneratedChunk(cx, cz, tempChunkBytes)
else:
level.worldFolder.saveChunk(cx, cz, tempChunkBytes)
level._allChunks = None
