public BTree1Node(H5BinaryReader reader, Superblock superblock, Func <T> decodeKey)
{
_reader = reader;
_superblock = superblock;
_decodeKey = decodeKey;
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, BTree1Node <T> .Signature);
this.NodeType = (BTree1NodeType)reader.ReadByte();
this.NodeLevel = reader.ReadByte();
this.EntriesUsed = reader.ReadUInt16();
this.LeftSiblingAddress = superblock.ReadOffset(reader);
this.RightSiblingAddress = superblock.ReadOffset(reader);
this.Keys = new T[this.EntriesUsed + 1];
this.ChildAddresses = new ulong[this.EntriesUsed];
for (int i = 0; i < this.EntriesUsed; i++)
{
this.Keys[i] = decodeKey();
this.ChildAddresses[i] = superblock.ReadOffset(reader);
}
this.Keys[this.EntriesUsed] = decodeKey();
}
public MultiDriverInfo(H5BinaryReader reader) : base(reader)
{
// member mapping
this.MemberMapping1 = (MemberMapping)reader.ReadByte();
this.MemberMapping2 = (MemberMapping)reader.ReadByte();
this.MemberMapping3 = (MemberMapping)reader.ReadByte();
this.MemberMapping4 = (MemberMapping)reader.ReadByte();
this.MemberMapping5 = (MemberMapping)reader.ReadByte();
this.MemberMapping6 = (MemberMapping)reader.ReadByte();
// reserved
reader.ReadBytes(3);
// member count
var memberCount = new MemberMapping[] { this.MemberMapping1, this.MemberMapping2, this.MemberMapping3,
this.MemberMapping4, this.MemberMapping5, this.MemberMapping6 }.Distinct().Count();
// member start and end addresses
this.MemberFileStartAddresses = new List <ulong>(memberCount);
this.MemberFileEndAddresses = new List <ulong>(memberCount);
for (int i = 0; i < memberCount; i++)
{
this.MemberFileStartAddresses[i] = reader.ReadUInt64();
this.MemberFileEndAddresses[i] = reader.ReadUInt64();
}
// member names
this.MemberNames = new List <string>(memberCount);
for (int i = 0; i < memberCount; i++)
{
this.MemberNames[i] = H5Utils.ReadNullTerminatedString(reader, pad: true);
}
}
public BTree2Node(H5BinaryReader reader, BTree2Header <T> header, ushort recordCount, byte[] signature, Func <T> decodeKey)
: base(reader)
{
// signature
var actualSignature = reader.ReadBytes(4);
H5Utils.ValidateSignature(actualSignature, signature);
// version
this.Version = reader.ReadByte();
// type
this.Type = (BTree2Type)reader.ReadByte();
if (this.Type != header.Type)
{
throw new FormatException($"The BTree2 internal node type ('{this.Type}') does not match the type defined in the header ('{header.Type}').");
}
// records
this.Records = new T[recordCount];
for (ulong i = 0; i < recordCount; i++)
{
this.Records[i] = decodeKey();
}
}
public FixedArrayHeader(H5BinaryReader reader, Superblock superblock, uint chunkSizeLength) : base(reader)
{
_superblock = superblock;
_chunkSizeLength = chunkSizeLength;
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, FixedArrayHeader.Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientID = (ClientID)reader.ReadByte();
// entry size
this.EntrySize = reader.ReadByte();
// page bits
this.PageBits = reader.ReadByte();
// entries count
this.EntriesCount = superblock.ReadLength(reader);
// data block address
this.DataBlockAddress = superblock.ReadOffset(reader);
// checksum
this.Checksum = reader.ReadUInt32();
}
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 GlobalHeapCollection(H5BinaryReader reader, Superblock superblock) : base(reader)
{
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, GlobalHeapCollection.Signature);
// version
this.Version = reader.ReadByte();
// reserved
reader.ReadBytes(3);
// collection size
this.CollectionSize = superblock.ReadLength(reader);
// global heap objects
this.GlobalHeapObjects = new List <GlobalHeapObject>();
var headerSize = 8UL + superblock.LengthsSize;
var remaining = this.CollectionSize;
while (remaining > headerSize)
{
var before = reader.BaseStream.Position;
var globalHeapObject = new GlobalHeapObject(reader, superblock);
this.GlobalHeapObjects.Add(globalHeapObject);
var after = reader.BaseStream.Position;
var consumed = (ulong)(after - before);
remaining -= consumed;
}
}
public EnumerationPropertyDescription(H5BinaryReader reader, byte version, uint valueSize, ushort memberCount) : base(reader)
{
// base type
this.BaseType = new DatatypeMessage(reader);
// names
this.Names = new List <string>(memberCount);
for (int i = 0; i < memberCount; i++)
{
if (version <= 2)
{
this.Names.Add(H5Utils.ReadNullTerminatedString(reader, pad: true));
}
else
{
this.Names.Add(H5Utils.ReadNullTerminatedString(reader, pad: false));
}
}
// values
this.Values = new List <byte[]>(memberCount);
for (int i = 0; i < memberCount; i++)
{
this.Values.Add(reader.ReadBytes((int)valueSize));
}
}
public BTree2InternalNode(H5BinaryReader reader, Superblock superblock, BTree2Header <T> header, ushort recordCount, int nodeLevel, Func <T> decodeKey)
: base(reader, header, recordCount, BTree2InternalNode <T> .Signature, decodeKey)
{
this.NodePointers = new BTree2NodePointer[recordCount + 1];
// H5B2cache.c (H5B2__cache_int_deserialize)
for (int i = 0; i < recordCount + 1; i++)
{
// address
this.NodePointers[i].Address = superblock.ReadOffset(reader);
// record count
var childRecordCount = H5Utils.ReadUlong(reader, header.MaxRecordCountSize);
this.NodePointers[i].RecordCount = (ushort)childRecordCount;
// total record count
if (nodeLevel > 1)
{
var totalChildRecordCount = H5Utils.ReadUlong(reader, header.NodeInfos[nodeLevel - 1].CumulatedTotalRecordCountSize);
this.NodePointers[i].TotalRecordCount = totalChildRecordCount;
}
else
{
this.NodePointers[i].TotalRecordCount = childRecordCount;
}
}
// checksum
this.Checksum = reader.ReadUInt32();
}
public T[] Read <T>() where T : struct
{
switch (this.Message.Datatype.Class)
{
case DatatypeMessageClass.FixedPoint:
case DatatypeMessageClass.FloatingPoint:
case DatatypeMessageClass.BitField:
case DatatypeMessageClass.Opaque:
case DatatypeMessageClass.Compound:
case DatatypeMessageClass.Reference:
case DatatypeMessageClass.Enumerated:
case DatatypeMessageClass.Array:
break;
default:
throw new Exception($"This method can only be used with one of the following type classes: '{DatatypeMessageClass.FixedPoint}', '{DatatypeMessageClass.FloatingPoint}', '{DatatypeMessageClass.BitField}', '{DatatypeMessageClass.Opaque}', '{DatatypeMessageClass.Compound}', '{DatatypeMessageClass.Reference}', '{DatatypeMessageClass.Enumerated}' and '{DatatypeMessageClass.Array}'.");
}
var buffer = this.Message.Data;
var byteOrderAware = this.Message.Datatype.BitField as IByteOrderAware;
if (byteOrderAware != null)
{
H5Utils.EnsureEndianness(buffer.ToArray(), buffer, byteOrderAware.ByteOrder, this.Message.Datatype.Size);
}
return(MemoryMarshal
.Cast <byte, T>(this.Message.Data)
.ToArray());
}
public T[] ReadCompound <T>(
Func <FieldInfo, string>?getName = default,
Selection?fileSelection = default,
Selection?memorySelection = default,
ulong[]?memoryDims = default,
H5DatasetAccess datasetAccess = default) where T : struct
{
var data = this.Read <byte>(
null,
fileSelection,
memorySelection,
memoryDims,
datasetAccess,
skipShuffle: false);
if (data is null)
{
throw new Exception("The buffer is null. This should never happen.");
}
if (getName is null)
{
getName = fieldInfo => fieldInfo.Name;
}
return(H5Utils.ReadCompound <T>(this.InternalDataType, this.InternalDataspace, this.Context.Superblock, data, getName));
}
public override void Initialize()
{
base.Initialize();
_unlimitedDim = this.Dataset.InternalDataspace.DimensionMaxSizes
.ToList()
.FindLastIndex(value => value == H5Constants.Unlimited);
// H5Dearray.c (H5D__earray_idx_resize)
/* "Swizzle" constant dimensions for this dataset */
if (_unlimitedDim > 0)
{
/* Get the swizzled chunk dimensions */
_swizzledChunkDims = this.ChunkDims.ToArray();
H5Utils.SwizzleCoords(_swizzledChunkDims, _unlimitedDim);
/* Get the swizzled number of chunks in each dimension */
var swizzledScaledDims = this.ScaledDims.ToArray();
H5Utils.SwizzleCoords(swizzledScaledDims, _unlimitedDim);
/* Get the swizzled "down" sizes for each dimension */
_swizzledDownChunkCounts = swizzledScaledDims.AccumulateReverse();
/* Get the swizzled max number of chunks in each dimension */
var swizzledScaledMaxDims = this.ScaledMaxDims.ToArray();
H5Utils.SwizzleCoords(swizzledScaledMaxDims, _unlimitedDim);
/* Get the swizzled max "down" sizes for each dimension */
_swizzledDownMaxChunkCounts = swizzledScaledMaxDims.AccumulateReverse();
}
}
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);
}
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 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 FreeSpaceManagerHeader(H5BinaryReader reader, Superblock superblock) : base(reader)
{
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, FreeSpaceManagerHeader.Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientId = (ClientId)reader.ReadByte();
// total space tracked
this.TotalSpaceTracked = superblock.ReadLength(reader);
// total sections count
this.TotalSectionsCount = superblock.ReadLength(reader);
// serialized sections count
this.SerializedSectionsCount = superblock.ReadLength(reader);
// un-serialized sections count
this.UnSerializedSectionsCount = superblock.ReadLength(reader);
// section classes count
this.SectionClassesCount = reader.ReadUInt16();
// shrink percent
this.ShrinkPercent = reader.ReadUInt16();
// expand percent
this.ExpandPercent = reader.ReadUInt16();
// address space size
this.AddressSpaceSize = reader.ReadUInt16();
// maximum section size
this.MaximumSectionSize = superblock.ReadLength(reader);
// serialized section list address
this.SerializedSectionListAddress = superblock.ReadOffset(reader);
// serialized section list used
this.SerializedSectionListUsed = superblock.ReadLength(reader);
// serialized section list allocated size
this.SerializedSectionListAllocatedSize = superblock.ReadLength(reader);
// checksum
this.Checksum = reader.ReadUInt32();
}
public SharedObjectHeaderMessageTable(H5BinaryReader reader) : base(reader)
{
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, SharedObjectHeaderMessageTable.Signature);
//
#warning implement this correctly
// checksum
this.Checksum = reader.ReadUInt32();
}
protected override ChunkInfo GetChunkInfo(ulong[] chunkIndices)
{
if (this.Dataset.InternalFilterPipeline is null)
{
if (_btree2_no_filter is null)
{
this.Dataset.Context.Reader.Seek((long)this.Dataset.InternalDataLayout.Address, SeekOrigin.Begin);
Func <BTree2Record10> decodeKey
= () => this.DecodeRecord10(this.ChunkRank);
_btree2_no_filter = new BTree2Header <BTree2Record10>(this.Dataset.Context.Reader, this.Dataset.Context.Superblock, decodeKey);
}
// get record
var success = _btree2_no_filter.TryFindRecord(out var record, record =>
{
// H5Dbtree2.c (H5D__bt2_compare)
return(H5Utils.VectorCompare(this.ChunkRank, chunkIndices, record.ScaledOffsets));
});
return(success
? new ChunkInfo(record.Address, this.ChunkByteSize, 0)
: ChunkInfo.None);
}
else
{
if (_btree2_filter is null)
{
this.Dataset.Context.Reader.Seek((long)this.Dataset.InternalDataLayout.Address, SeekOrigin.Begin);
var chunkSizeLength = H5Utils.ComputeChunkSizeLength(this.ChunkByteSize);
Func <BTree2Record11> decodeKey =
() => this.DecodeRecord11(this.ChunkRank, chunkSizeLength);
_btree2_filter = new BTree2Header <BTree2Record11>(this.Dataset.Context.Reader, this.Dataset.Context.Superblock, decodeKey);
}
// get record
var success = _btree2_filter.TryFindRecord(out var record, record =>
{
// H5Dbtree2.c (H5D__bt2_compare)
return(H5Utils.VectorCompare(this.ChunkRank, chunkIndices, record.ScaledOffsets));
});
return(success
? new ChunkInfo(record.Address, record.ChunkSize, record.FilterMask)
: ChunkInfo.None);
}
}
public ExtensibleArrayIndexBlock(
H5BinaryReader reader,
Superblock superblock,
ExtensibleArrayHeader header,
Func <H5BinaryReader, T> decode)
{
// H5EAiblock.c (H5EA__iblock_alloc)
this.SecondaryBlockDataBlockAddressCount = 2 * (ulong)Math.Log(header.SecondaryBlockMinimumDataBlockPointerCount, 2);
ulong dataBlockPointerCount = (ulong)(2 * (header.SecondaryBlockMinimumDataBlockPointerCount - 1));
ulong secondaryBlockPointerCount = header.SecondaryBlockCount - this.SecondaryBlockDataBlockAddressCount;
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, ExtensibleArrayIndexBlock <T> .Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientID = (ClientID)reader.ReadByte();
// header address
this.HeaderAddress = superblock.ReadOffset(reader);
// elements
this.Elements = Enumerable
.Range(0, header.IndexBlockElementsCount)
.Select(i => decode(reader))
.ToArray();
// data block addresses
this.DataBlockAddresses = new ulong[dataBlockPointerCount];
for (ulong i = 0; i < dataBlockPointerCount; i++)
{
this.DataBlockAddresses[i] = superblock.ReadOffset(reader);
}
// secondary block addresses
this.SecondaryBlockAddresses = new ulong[secondaryBlockPointerCount];
for (ulong i = 0; i < secondaryBlockPointerCount; i++)
{
this.SecondaryBlockAddresses[i] = superblock.ReadOffset(reader);
}
// checksum
this.Checksum = reader.ReadUInt32();
}
public SharedMessageRecordList(H5BinaryReader reader) : base(reader)
{
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, SharedMessageRecordList.Signature);
// share message records
this.SharedMessageRecords = new List <SharedMessageRecord>();
#warning how to know how many?
// checksum
this.Checksum = reader.ReadUInt32();
}
private Span <byte> GetBuffer <T>(out T[] result) where T : struct
{
// first, get byte size
var byteSize = H5Utils.CalculateSize(this.Dataspace.DimensionSizes, this.Dataspace.Type) * this.Datatype.Size;
// second, convert file type (e.g. 2 bytes) to T (e.g. 4 bytes)
var arraySize = byteSize / (ulong)Unsafe.SizeOf <T>();
// finally, create buffer
result = new T[arraySize];
var buffer = MemoryMarshal.AsBytes(result.AsSpan());
return(buffer);
}
public LinkMessage(H5BinaryReader reader, Superblock superblock) : base(reader)
{
// version
this.Version = reader.ReadByte();
// flags
this.Flags = reader.ReadByte();
// link type
var isLinkTypeFieldPresent = (this.Flags & (1 << 3)) > 0;
if (isLinkTypeFieldPresent)
{
this.LinkType = (LinkType)reader.ReadByte();
}
// creation order
var isCreationOrderFieldPresent = (this.Flags & (1 << 2)) > 0;
if (isCreationOrderFieldPresent)
{
this.CreationOrder = reader.ReadUInt64();
}
// link name encoding
var isLinkNameEncodingFieldPresent = (this.Flags & (1 << 4)) > 0;
if (isLinkNameEncodingFieldPresent)
{
this.LinkNameEncoding = (CharacterSetEncoding)reader.ReadByte();
}
// link length
var linkLengthFieldLength = (ulong)(1 << (this.Flags & 0x03));
var linkNameLength = H5Utils.ReadUlong(this.Reader, linkLengthFieldLength);
// link name
this.LinkName = H5Utils.ReadFixedLengthString(reader, (int)linkNameLength, this.LinkNameEncoding);
// link info
this.LinkInfo = this.LinkType switch
{
LinkType.Hard => new HardLinkInfo(reader, superblock),
LinkType.Soft => new SoftLinkInfo(reader),
LinkType.External => new ExternalLinkInfo(reader),
_ when(65 <= (byte)this.LinkType && (byte)this.LinkType <= 255) => new UserDefinedLinkInfo(reader),
_ => throw new NotSupportedException($"The link message link type '{this.LinkType}' is not supported.")
};
}
internal ObjectHeaderContinuationBlock2(H5Context context, ulong objectHeaderSize, byte version, bool withCreationOrder)
: base(context.Reader)
{
// signature
var signature = context.Reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, ObjectHeaderContinuationBlock2.Signature);
// header messages
var messages = this.ReadHeaderMessages(context, objectHeaderSize - 8, version, withCreationOrder);
this.HeaderMessages.AddRange(messages);
#warning H5OCache.c (L. 1595) /* Gaps should only occur in chunks with no null messages */
#warning read gap and checksum
}
public FixedArrayDataBlock(H5BinaryReader reader, Superblock superblock, FixedArrayHeader header, uint chunkSizeLength)
{
// H5FAdblock.c (H5FA__dblock_alloc)
this.ElementsPerPage = 1UL << header.PageBits;
this.PageCount = 0UL;
var pageBitmapSize = 0UL;
if (header.EntriesCount > this.ElementsPerPage)
{
/* Compute number of pages */
this.PageCount = (header.EntriesCount + this.ElementsPerPage - 1) / this.ElementsPerPage;
/* Compute size of 'page init' flag array, in bytes */
pageBitmapSize = (this.PageCount + 7) / 8;
}
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, FixedArrayDataBlock.Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientID = (ClientID)reader.ReadByte();
// header address
this.HeaderAddress = superblock.ReadOffset(reader);
// page bitmap
if (this.PageCount > 0)
{
this.PageBitmap = reader.ReadBytes((int)pageBitmapSize);
}
// elements
else
{
this.Elements = ArrayIndexUtils.ReadElements(reader, superblock, header.EntriesCount, this.ClientID, chunkSizeLength);
}
// checksum
this.Checksum = reader.ReadUInt32();
}
public ExtensibleArrayDataBlock(H5BinaryReader reader, Superblock superblock, ExtensibleArrayHeader header, ulong elementCount, Func <H5BinaryReader, T> decode)
{
// H5EAdblock.c (H5EA__dblock_alloc)
this.PageCount = 0UL;
if (elementCount > header.DataBlockPageElementsCount)
{
/* Set the # of pages in the data block */
this.PageCount = elementCount / header.DataBlockPageElementsCount;
}
// H5EAcache.c (H5EA__cache_dblock_deserialize)
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, ExtensibleArrayDataBlock <T> .Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientID = (ClientID)reader.ReadByte();
// header address
this.HeaderAddress = superblock.ReadOffset(reader);
// block offset
this.BlockOffset = H5Utils.ReadUlong(reader, header.ArrayOffsetsSize);
// elements
if (this.PageCount == 0)
{
this.Elements = Enumerable
.Range(0, (int)elementCount)
.Select(i => decode(reader))
.ToArray();
}
else
{
this.Elements = new T[0];
}
// checksum
this.Checksum = reader.ReadUInt32();
}
public ExternalLinkInfo(H5BinaryReader reader) : base(reader)
{
// value length
this.ValueLength = reader.ReadUInt16();
// version and flags
var data = reader.ReadByte();
this.Version = (byte)((data & 0xF0) >> 4); // take only upper 4 bits
this.Flags = (byte)((data & 0x0F) >> 0); // take only lower 4 bits
// file name
this.FilePath = H5Utils.ReadNullTerminatedString(reader, pad: false);
// full object path
this.FullObjectPath = H5Utils.ReadNullTerminatedString(reader, pad: false);
}
private Stream EnsureStream()
{
if (_stream is null)
{
var name = _heap.GetObjectName(_slot.NameHeapOffset);
var filePath = H5Utils.ConstructExternalFilePath(name, _datasetAccess);
if (!File.Exists(filePath))
{
throw new Exception($"External file '{filePath}' does not exist.");
}
_stream = File.OpenRead(filePath);
_stream.Seek((long)_slot.Offset, SeekOrigin.Begin);
}
return(_stream);
}
public ExtensibleArrayIndexBlock(H5BinaryReader reader, Superblock superblock, ExtensibleArrayHeader header, uint chunkSizeLength)
{
// H5EAiblock.c (H5EA__iblock_alloc)
ulong secondaryBlockDataBlockAddressCount = 2 * (ulong)Math.Log(header.SecondaryBlockMinimumDataBlockPointerCount, 2);
ulong dataBlockPointerCount = (ulong)(2 * (header.SecondaryBlockMinimumDataBlockPointerCount - 1));
ulong secondaryBlockPointerCount = header.SecondaryBlockCount - secondaryBlockDataBlockAddressCount;
// signature
var signature = reader.ReadBytes(4);
H5Utils.ValidateSignature(signature, ExtensibleArrayIndexBlock.Signature);
// version
this.Version = reader.ReadByte();
// client ID
this.ClientID = (ClientID)reader.ReadByte();
// header address
this.HeaderAddress = superblock.ReadOffset(reader);
// elements
this.Elements = ArrayIndexUtils.ReadElements(reader, superblock, header.IndexBlockElementsCount, this.ClientID, chunkSizeLength);
// data block addresses
this.DataBlockAddresses = new ulong[dataBlockPointerCount];
for (ulong i = 0; i < dataBlockPointerCount; i++)
{
this.DataBlockAddresses[i] = superblock.ReadOffset(reader);
}
// secondary block addresses
this.SecondaryBlockAddresses = new ulong[secondaryBlockPointerCount];
for (ulong i = 0; i < secondaryBlockPointerCount; i++)
{
this.SecondaryBlockAddresses[i] = superblock.ReadOffset(reader);
}
// checksum
this.Checksum = reader.ReadUInt32();
}
public DriverInfoMessage(H5BinaryReader reader) : base(reader)
{
// version
this.Version = reader.ReadByte();
// driver id
this.DriverId = H5Utils.ReadFixedLengthString(reader, 8);
// driver info size
this.DriverInfoSize = reader.ReadUInt16();
// driver info
this.DriverInfo = this.DriverId switch
{
"NCSAmulti" => new MultiDriverInfo(reader),
"NCSAfami" => new FamilyDriverInfo(reader),
_ => throw new NotSupportedException($"The driver ID '{this.DriverId}' is not supported.")
};
}
internal static ObjectHeader Construct(H5Context context)
{
// get version
var version = context.Reader.ReadByte();
// must be a version 2+ object header
if (version != 1)
{
var signature = new byte[] { version }.Concat(context.Reader.ReadBytes(3)).ToArray();
H5Utils.ValidateSignature(signature, ObjectHeader2.Signature);
version = context.Reader.ReadByte();
}
return(version switch
{
1 => new ObjectHeader1(context, version),
2 => new ObjectHeader2(context, version),
_ => throw new NotSupportedException($"The object header version '{version}' is not supported.")
});
public static DataBlockElement[] ReadElements(H5BinaryReader reader,
Superblock superblock,
ulong elementsCount,
ClientID clientID,
uint chunkSizeLength)
{
var elements = new DataBlockElement[elementsCount];
switch (clientID)
{
case ClientID.NonFilteredDatasetChunks:
for (ulong i = 0; i < elementsCount; i++)
{
elements[i] = new DataBlockElement()
{
Address = superblock.ReadOffset(reader)
};
}
break;
case ClientID.FilteredDatasetChunks:
for (ulong i = 0; i < elementsCount; i++)
{
elements[i] = new DataBlockElement()
{
Address = superblock.ReadOffset(reader),
ChunkSize = (uint)H5Utils.ReadUlong(reader, chunkSizeLength),
FilterMask = reader.ReadUInt32()
};
}
break;
default:
throw new Exception($"Client ID '{clientID}' is not supported.");
}
return(elements);
}