public DataInputStream getChunkDataInputStream(int i, int j)
{
if (outOfBounds(i, j))
{
debugln("READ", i, j, "out of bounds");
return(null);
}
try
{
int k = getOffset(i, j);
if (k == 0)
{
return(null);
}
int l = k >> 8;
int i1 = k & 0xff;
if (l + i1 > sectorFree.size())
{
debugln("READ", i, j, "invalid sector");
return(null);
}
dataFile.seek(l * 4096);
int j1 = dataFile.readInt();
if (j1 > 4096 * i1)
{
debugln("READ", i, j,
(new StringBuilder()).append("invalid length: ").append(j1).append(" > 4096 * ").append(i1).
toString());
return(null);
}
byte byte0 = dataFile.readByte();
if (byte0 == 1)
{
var abyte0 = new byte[j1 - 1];
dataFile.read(abyte0);
var datainputstream =
new DataInputStream(new GZIPInputStream(new ByteArrayInputStream(abyte0)));
return(datainputstream);
}
if (byte0 == 2)
{
var abyte1 = new byte[j1 - 1];
dataFile.read(abyte1);
var datainputstream1 =
new DataInputStream(new InflaterInputStream(new ByteArrayInputStream(abyte1)));
return(datainputstream1);
}
else
{
debugln("READ", i, j, (new StringBuilder()).append("unknown version ").append(byte0).toString());
return(null);
}
}
catch (IOException)
{
debugln("READ", i, j, "exception");
}
return(null);
}
public virtual DataInputStream GetChunkDataInputStream(int x, int z)
{
if (OutOfBounds(x, z))
{
return(null);
}
try
{
int offset = GetOffset(x, z);
if (offset == 0)
{
return(null);
}
int sectorNumber = offset >> 8;
int numSectors = offset & 0xFF;
if (sectorNumber + numSectors > _sectorFree.Count)
{
return(null);
}
_file.seek(sectorNumber * SectorBytes);
int length = _file.readInt();
if (length > SectorBytes * numSectors)
{
return(null);
}
byte version = _file.readByte();
if (version == VersionGzip)
{
byte[] data = new byte[length - 1];
_file.read(data);
return(new DataInputStream(new ByteArrayInputStream(data)));
}
if (version != VersionDeflate)
{
return(null);
}
{
byte[] data = new byte[length - 1];
_file.read(data);
return(new DataInputStream(new InflaterInputStream(new ByteArrayInputStream(data))));
}
}
catch (Exception)
{
return(null);
}
}
