public NetChunkData(int roleId, WorldPos pos)
{
this.roleId = roleId;
worldPos = pos;
isExist = false;
data = new ChunkByteData();
}
public void SaveChunkData(int x, int z, ChunkByteData chunkByteData)
{
byte[] chunkSize = new byte[4];
Serialization.WriteIntToByteArr(chunkSize, (int)chunkByteData.data.Length);
int singleChunkLength = (int)chunkByteData.data.Length + 5;
int blockLength = ByteToSector(singleChunkLength);
ClearChunkData(x, z);
int blockOffset = GetChunkCanSavedSector(blockLength);
long blockOffsetStartByteIndex = SectorToByte(blockOffset);
_fs.Position = blockOffsetStartByteIndex;
//写入区块长度
_fs.Write(chunkSize, 0, chunkSize.Length);
//写入压缩格式
_fs.WriteByte((byte)chunkByteData.compressType);
//写入区块压缩数据
_fs.Write(chunkByteData.data, 0, (int)chunkByteData.data.Length);
int startPosition = (x * REGION_DEPTH + z) * 4;
_fs.Position = startPosition;
byte[] blockOffsetByte = new byte[4];
Serialization.WriteIntToByteArr(blockOffsetByte, blockOffset);
_fs.Write(blockOffsetByte, 0, 3);
_fs.WriteByte((byte)blockLength);
//更新可存储标志，并将块后面不足一个扇区的部分写0x00
for (int i = blockOffset; i < blockOffset + blockLength; i++)
{
_useSector[i] = true;
}
long chunkEnd = blockOffsetStartByteIndex + singleChunkLength;
long sectorEnd = blockOffsetStartByteIndex + SectorToByte(blockLength);
if (chunkEnd < sectorEnd)
{
_fs.Position = chunkEnd;
byte[] extendByte = Enumerable.Repeat((byte)0x00, (int)(sectorEnd - chunkEnd)).ToArray();
_fs.Write(extendByte, 0, extendByte.Length);
}
//截取文件最后没有使用的扇区
int lastUseSectorIndex = GetLastUseSectorIndex();
if (lastUseSectorIndex != -1 && lastUseSectorIndex != _useSector.Count - 1)
{
int truncatedIndex = lastUseSectorIndex + 1;
_useSector.RemoveRange(truncatedIndex, _useSector.Count - truncatedIndex);
_fs.SetLength(SectorToByte(truncatedIndex));
}
//更新headData数据
_headData[x, z].BlockOffset = blockOffset;
_headData[x, z].BlockLength = (byte)blockLength;
_headData[x, z].Length = chunkByteData.data.Length;
_headData[x, z].status = ChunkDataStatus.OK;
_headData[x, z].CompressionType = chunkByteData.compressType;
}
public bool GetChunkData(int x, int z, ChunkByteData chunkByteData)
{
if (_headData[x, z].status == ChunkDataStatus.Not_Create)
{
return(false);
}
_fs.Position = SectorToByte(_headData[x, z].BlockOffset) + 5;
byte[] data = new byte[_headData[x, z].Length];
_fs.Read(data, 0, data.Length);
chunkByteData.data = data;
chunkByteData.compressType = _headData[x, z].CompressionType;
return(true);
}