/// <summary>Writes a class instance to the stream.</summary>
/// <param name="v">The class instance to write. This instance cannot be null.</param>
/// <param name="formalTypeId">The type ID of the formal type of the parameter or data member being written.
/// Use null when the type of the parameter/data member is AnyClass.</param>
public void WriteClass(AnyClass v, string?formalTypeId)
{
Debug.Assert(InEncapsulation);
if (_current.InstanceType != InstanceType.None && _format == FormatType.Sliced)
{
// If writing an instance within a slice and using the sliced format, write an index of that slice's
// indirection table.
if (_current.IndirectionMap != null && _current.IndirectionMap.TryGetValue(v, out int index))
{
// Found, index is position in indirection table + 1
Debug.Assert(index > 0);
}
else
{
_current.IndirectionTable ??= new List <AnyClass>();
_current.IndirectionMap ??= new Dictionary <AnyClass, int>();
_current.IndirectionTable.Add(v);
index = _current.IndirectionTable.Count; // Position + 1 (0 is reserved for null)
_current.IndirectionMap.Add(v, index);
}
WriteSize(index);
}
else
{
WriteInstance(v, formalTypeId); // Writes the instance or a reference if already marshaled.
}
}
internal void FirstSliceInit(AnyClass v, bool setSlicedData)
{
Debug.Assert(_current != null);
// Add the instance to the map/list of instances. This must be done before reading the instances (for
// circular references).
_instanceMap ??= new List <AnyClass>();
_instanceMap.Add(v);
// Read all the deferred indirection tables now that the instance is inserted in _instanceMap.
if (_current.DeferredIndirectionTableList?.Count > 0)
{
int savedPos = _pos;
Debug.Assert(_current.Slices?.Count == _current.DeferredIndirectionTableList.Count);
for (int i = 0; i < _current.DeferredIndirectionTableList.Count; ++i)
{
int pos = _current.DeferredIndirectionTableList[i];
if (pos > 0)
{
_pos = pos;
_current.Slices[i].Instances = Array.AsReadOnly(ReadIndirectionTable());
}
// else remains empty
}
_pos = savedPos;
}
if (setSlicedData)
{
v.SlicedData = GetSlicedData();
}
}
public void IceStartFirstSlice(string typeId, AnyClass v, bool setSlicedData = false)
{
Debug.Assert(InEncapsulation);
Debug.Assert(_current != null && (_current.SliceTypeId == null || _current.SliceTypeId == typeId));
Debug.Assert(_current.InstanceType == InstanceType.Class);
FirstSliceInit(v, setSlicedData);
ReadIndirectionTableIntoCurrent();
}
/// <summary>Reads an indirection table from the stream, without updating _current.</summary>
/// <returns>The indirection table.</returns>
private AnyClass[] ReadIndirectionTable()
{
int size = ReadAndCheckSeqSize(1);
if (size == 0)
{
throw new InvalidDataException("invalid empty indirection table");
}
var indirectionTable = new AnyClass[size];
for (int i = 0; i < indirectionTable.Length; ++i)
{
int index = ReadSize();
if (index < 1)
{
throw new InvalidDataException($"read invalid index {index} in indirection table");
}
indirectionTable[i] = ReadInstance(index, formalTypeId: null);
}
return(indirectionTable);
}
