public override T Read <T>(Func <H5BinaryReader, T> func, [AllowNull] ref List <BTree2Record01> record01Cache)
{
// huge objects b-tree v2
if (record01Cache is null)
{
_reader.Seek((long)_heapHeader.HugeObjectsBTree2Address, SeekOrigin.Begin);
var hugeBtree2 = new BTree2Header <BTree2Record01>(_reader, _superblock, this.DecodeRecord01);
record01Cache = hugeBtree2.EnumerateRecords().ToList();
}
var hugeRecord = record01Cache.FirstOrDefault(record => record.HugeObjectId == this.BTree2Key);
_reader.Seek((long)hugeRecord.HugeObjectAddress, SeekOrigin.Begin);
return(func(_reader));
}
public override T Read <T>(Func <H5BinaryReader, T> func, [AllowNull] ref List <BTree2Record01> record01Cache)
{
var address = _header.GetAddress(this);
_reader.Seek((long)address, SeekOrigin.Begin);
return(func(_reader));
}
public bool TryFindUserData <TUserData>([NotNullWhen(returnValue: true)] out TUserData userData,
Func <T, T, int> compare3,
FoundDelegate <T, TUserData> found)
where TUserData : struct
{
userData = default;
// H5B.c (H5B_find)
/*
* Perform a binary search to locate the child which contains
* the thing for which we're searching.
*/
(var index, var cmp) = this.LocateRecord(compare3);
/* Check if not found */
if (cmp != 0)
{
return(false);
}
/*
* Follow the link to the subtree or to the data node.
*/
var childAddress = this.ChildAddresses[(int)index];
var key = this.Keys[index];
if (this.NodeLevel > 0)
{
_reader.Seek((long)childAddress, SeekOrigin.Begin);
var subtree = new BTree1Node <T>(_reader, _superblock, _decodeKey);
if (subtree.TryFindUserData(out userData, compare3, found))
{
return(true);
}
}
else
{
if (found(childAddress, key, out userData))
{
return(true);
}
}
return(false);
}
internal static H5File Open(string filePath, FileMode mode, FileAccess fileAccess, FileShare fileShare, bool deleteOnClose)
{
if (!BitConverter.IsLittleEndian)
{
throw new Exception("This library only works on little endian systems.");
}
var absoluteFilePath = System.IO.Path.GetFullPath(filePath);
var reader = new H5BinaryReader(System.IO.File.Open(absoluteFilePath, mode, fileAccess, fileShare));
// superblock
int stepSize = 512;
var signature = reader.ReadBytes(8);
while (!H5File.ValidateSignature(signature, Superblock.FormatSignature))
{
reader.Seek(stepSize - 8, SeekOrigin.Current);
if (reader.BaseStream.Position >= reader.BaseStream.Length)
{
throw new Exception("The file is not a valid HDF 5 file.");
}
signature = reader.ReadBytes(8);
stepSize *= 2;
}
var version = reader.ReadByte();
var superblock = (Superblock)(version switch
{
0 => new Superblock01(reader, version),
1 => new Superblock01(reader, version),
2 => new Superblock23(reader, version),
3 => new Superblock23(reader, version),
_ => throw new NotSupportedException($"The superblock version '{version}' is not supported.")
});
private static GlobalHeapCollection ReadGlobalHeapCollection(H5BinaryReader reader, Superblock superblock, ulong address)
{
reader.Seek((long)address, SeekOrigin.Begin);
return(new GlobalHeapCollection(reader, superblock));
}
