public static HFSDataRecord Read(ref ReadOnlySpan <byte> data, int size, HFSTreeHeaderRecord headerRecord, bool isHFSX)
{
bool isBigKey = headerRecord.Attributes.HasFlag(HFSTreeAttributes.BigKeys);
ushort keyLength = isBigKey ? ReadUInt16(ref data) : ReadUInt8(ref data);
int keySize = (isBigKey ? 2 : 1) + keyLength;
size -= keySize;
var key = new byte[keyLength];
data.Slice(0, keyLength).CopyTo(key);
data = data.Slice(keyLength);
// data is always aligned to 2 bytes
if (keySize % 2 == 1)
{
data = data.Slice(1);
size--;
}
var structData = new byte[size];
data.Slice(0, size).CopyTo(structData);
data = data.Slice(size);
return(new HFSDataRecord(key, structData, headerRecord.KeyCompareType, isHFSX));
}
public static HFSPointerRecord Read(ref ReadOnlySpan <byte> data, HFSTreeHeaderRecord headerRecord, bool isHFSX)
{
bool isBigKey = headerRecord.Attributes.HasFlag(HFSTreeAttributes.BigKeys);
ushort keyLength = isBigKey ? ReadUInt16(ref data) : ReadUInt8(ref data);
if (!headerRecord.Attributes.HasFlag(HFSTreeAttributes.VariableIndexKeys))
{
keyLength = headerRecord.MaxKeyLength;
}
int keySize = (isBigKey ? 2 : 1) + keyLength;
var key = new byte[keyLength];
data.Slice(0, keyLength).CopyTo(key);
data = data.Slice(keyLength);
// data is always aligned to 2 bytes
if (keySize % 2 == 1)
{
data = data.Slice(1);
}
uint nodeNumber = ReadUInt32(ref data);
return(new HFSPointerRecord(key, nodeNumber, headerRecord.KeyCompareType, isHFSX));
}
