public byte[] GetChunkCompressedBytes(Vector relativeChunkLocation)
{
// Sanity check
if (locationTable is null || timestampTable is null)
{
return(null);
}
var chunkIndex = GetChunkTableIndex(relativeChunkLocation);
var(offset, size) = locationTable.GetOffsetSizeAtIndex(chunkIndex);
if (size == 0)
{
return(null);
}
Memory <byte> memAlloc = fileCache.Memory.Slice(offset, size);
var chunkAllocation = new ChunkAllocation(memAlloc);
return(chunkAllocation.GetChunkBytes());
}
public async Task <bool> InitializeAsync()
{
if (!File.Exists(filePath))
{
await InitializeNewFileAsync();
}
try
{
regionFileStream = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException)
{
return(false);
}
// Load file into memory
await regionFileStream.ReadAsync(fileCache.Memory);
regionFileStream.Seek(0, SeekOrigin.Begin);
locationTable = new RegionFileHeaderTable(fileCache.Memory.Slice(0, tableSize));
timestampTable = new RegionFileHeaderTable(fileCache.Memory.Slice(tableSize, tableSize));
// Determine end of all allocations/next available allocation
nextAvailableOffset = 8192;
for (int x = 0; x < cubicRegionSize; x++)
{
for (int z = 0; z < cubicRegionSize; z++)
{
var tableIndex = GetChunkTableIndex(new Vector(x, 0, z));
var(offset, size) = locationTable.GetOffsetSizeAtIndex(tableIndex);
if (size == 0)
{
continue;
}
if (offset + size > nextAvailableOffset)
{
nextAvailableOffset = offset + size;
}
}
}
return(true);
}