public FractalHeapDirectBlock(FractalHeapHeader header, H5BinaryReader reader, Superblock superblock) : base(reader)
{
_superblock = superblock;
var headerSize = 0UL;
// signature
var signature = reader.ReadBytes(4);
headerSize += 4;
H5Utils.ValidateSignature(signature, FractalHeapDirectBlock.Signature);
// version
this.Version = reader.ReadByte();
headerSize += 1;
// heap header address
this.HeapHeaderAddress = superblock.ReadOffset(reader);
headerSize += superblock.OffsetsSize;
// block offset
var blockOffsetFieldSize = (int)Math.Ceiling(header.MaximumHeapSize / 8.0);
this.BlockOffset = H5Utils.ReadUlong(this.Reader, (ulong)blockOffsetFieldSize);
headerSize += (ulong)blockOffsetFieldSize;
// checksum
if (header.Flags.HasFlag(FractalHeapHeaderFlags.DirectBlocksAreChecksummed))
{
this.Checksum = reader.ReadUInt32();
headerSize += 4;
}
this.HeaderSize = headerSize;
}
public ManagedObjectsFractalHeapId(H5BinaryReader reader, H5BinaryReader localReader, FractalHeapHeader header, ulong offsetByteCount, ulong lengthByteCount)
{
_reader = reader;
_header = header;
this.Offset = H5Utils.ReadUlong(localReader, offsetByteCount);
this.Length = H5Utils.ReadUlong(localReader, lengthByteCount);
}
internal HugeObjectsFractalHeapIdSubType1(H5BinaryReader reader, Superblock superblock, H5BinaryReader localReader, FractalHeapHeader header)
{
_reader = reader;
_superblock = superblock;
_heapHeader = header;
// BTree2 key
this.BTree2Key = H5Utils.ReadUlong(localReader, header.HugeIdsSize);
}
public FractalHeapIndirectBlock(FractalHeapHeader header, H5BinaryReader reader, Superblock superblock, uint rowCount) : base(reader)
{
_superblock = superblock;
this.RowCount = rowCount;
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, FractalHeapIndirectBlock.Signature);
// version
this.Version = reader.ReadByte();
// heap header address
this.HeapHeaderAddress = superblock.ReadOffset(reader);
// block offset
var blockOffsetFieldSize = (int)Math.Ceiling(header.MaximumHeapSize / 8.0);
this.BlockOffset = H5Utils.ReadUlong(this.Reader, (ulong)blockOffsetFieldSize);
// H5HFcache.c (H5HF__cache_iblock_deserialize)
var length = rowCount * header.TableWidth;
this.Entries = new FractalHeapEntry[length];
for (uint i = 0; i < this.Entries.Length; i++)
{
/* Decode child block address */
this.Entries[i].Address = _superblock.ReadOffset(reader);
/* Check for heap with I/O filters */
if (header.IOFilterEncodedLength > 0)
{
/* Decode extra information for direct blocks */
if (i < (header.MaxDirectRows * header.TableWidth))
{
/* Size of filtered direct block */
this.Entries[i].FilteredSize = _superblock.ReadLength(reader);
/* I/O filter mask for filtered direct block */
this.Entries[i].FilterMask = reader.ReadUInt32();
}
}
/* Count child blocks */
if (!superblock.IsUndefinedAddress(this.Entries[i].Address))
{
this.ChildCount++;
this.MaxChildIndex = i;
}
}
// checksum
this.Checksum = reader.ReadUInt32();
}
internal static FractalHeapId Construct(H5Context context, H5BinaryReader localReader, FractalHeapHeader header)
{
var firstByte = localReader.ReadByte();
// bits 6-7
var version = (byte)((firstByte & 0xB0) >> 6);
if (version != 0)
{
throw new FormatException($"Only version 0 instances of type {nameof(FractalHeapId)} are supported.");
}
// bits 4-5
var type = (FractalHeapIdType)((firstByte & 0x30) >> 4);
// offset and length Size (for managed objects fractal heap id)
var offsetSize = (ulong)Math.Ceiling(header.MaximumHeapSize / 8.0);
#warning Is -1 correct?
var lengthSize = H5Utils.FindMinByteCount(header.MaximumDirectBlockSize - 1);
// H5HF.c (H5HF_op)
return((FractalHeapId)((type, header.HugeIdsAreDirect, header.IOFilterEncodedLength, header.TinyObjectsAreExtended) switch
{
(FractalHeapIdType.Managed, _, _, _) => new ManagedObjectsFractalHeapId(context.Reader, localReader, header, offsetSize, lengthSize),
// H5HFhuge.c (H5HF__huge_op_real)
(FractalHeapIdType.Huge, false, 0, _) => new HugeObjectsFractalHeapIdSubType1(context.Reader, context.Superblock, localReader, header),
(FractalHeapIdType.Huge, false, _, _) => new HugeObjectsFractalHeapIdSubType2(context.Reader, context.Superblock, localReader, header),
(FractalHeapIdType.Huge, true, 0, _) => new HugeObjectsFractalHeapIdSubType3(context.Reader, context.Superblock, localReader),
(FractalHeapIdType.Huge, true, _, _) => new HugeObjectsFractalHeapIdSubType4(context.Reader, context.Superblock, localReader),
// H5HFtiny.c (H5HF_tiny_op_real)
(FractalHeapIdType.Tiny, _, _, false) => new TinyObjectsFractalHeapIdSubType1(localReader, firstByte),
(FractalHeapIdType.Tiny, _, _, true) => new TinyObjectsFractalHeapIdSubType2(localReader, firstByte),
// default
_ => throw new Exception($"Unknown heap ID type '{type}'.")
}));
public HugeObjectsFractalHeapIdSubType2(H5BinaryReader reader, Superblock superblock, H5BinaryReader localReader, FractalHeapHeader header)
: base(reader, superblock, localReader, header)
{
//
}