public int EndObject(Span <byte> buffer, SpanWriter writer, int tableLength)
{
checked
{
// TODO: Include some sort of hash function here so we don't have to do a linear traversal each time?
Debug.Assert(this.isNested);
this.isNested = false;
int vtableLength = 4 + 2 * (this.maxIndexWithValue + 1);
Span <byte> currentVTable = this.vTableBuffer.AsSpan().Slice(0, vtableLength);
var context = this.context;
writer.WriteUShort(currentVTable, (ushort)vtableLength, 0, context);
writer.WriteUShort(currentVTable, (ushort)tableLength, sizeof(ushort), context);
var offsets = this.vtableOffsets;
int offsetCount = offsets.Count;
for (int i = 0; i < offsetCount; ++i)
{
int offset = offsets[i];
ReadOnlySpan <byte> existingVTable = buffer.Slice(offset);
existingVTable = existingVTable.Slice(0, BinaryPrimitives.ReadUInt16LittleEndian(existingVTable));
if (existingVTable.SequenceEqual(currentVTable))
{
// We already have a vtable that matches this specification. Return that offset.
return(offset);
}
}
// Oh, well. Write the new table.
int newVTableOffset = context.AllocateSpace(vtableLength, sizeof(ushort));
currentVTable.CopyTo(buffer.Slice(newVTableOffset, vtableLength));
offsets.Add(newVTableOffset);
return(newVTableOffset);
}
}
/// <summary>
/// Writes the given object to the given memory block.
/// </summary>
/// <returns>The length of data that was written to the memory block.</returns>
public int Serialize <T>(T item, Span <byte> destination, SpanWriter writer) where T : class
{
return(this.GetOrCreateSerializer <T>().Write(writer, destination, item));
}