=> 1 + 4 + 4 + 4; // Type + Page Offset + Date + Size
public override void SerializeTypeMeta(ref SpanWriter writer)
{
writer.WriteByte((byte)EntryType);
writer.WriteInt32(PageOffset);
writer.WriteDateTimeT(ModifiedDate);
writer.WriteInt32(Size);
}
private protected int WriteAnnouncement(Span <byte> output, int entriesCount)
{
var writer = new SpanWriter <byte>(output);
writer.WriteUInt16(myPort, true);
writer.WriteInt64(term, true);
writer.WriteInt64(prevLogIndex, true);
writer.WriteInt64(prevLogTerm, true);
writer.WriteInt64(commitIndex, true);
writer.WriteInt32(entriesCount, true);
return(writer.WrittenCount);
}
public void WriteEntry(Entry entry)
{
int entrySize = entry.GetTotalSize(LastPosition);
if (entrySize + TocEntrySize > _spaceLeft)
{
throw new Exception("Not enough space to write entry.");
}
if (EntryCount == 0)
{
FirstEntry = entry;
}
SpanWriter blockWriter = new SpanWriter(Buffer);
blockWriter.Position = LastPosition;
// Begin to write the entry's common information
// Not actually BE, both are writen as indexing buffer
int entryOffset = blockWriter.Position;
blockWriter.Endian = Endian.Big;
blockWriter.WriteInt32(entry.ParentNode);
blockWriter.Endian = Endian.Little;
blockWriter.WriteStringRaw(entry.Name);
blockWriter.Align(0x04); // Entry is aligned
// Write type specific
int entryMetaOffset = blockWriter.Position;
entry.SerializeTypeMeta(ref blockWriter);
blockWriter.Align(0x04); // Whole entry is also aligned
LastPosition = blockWriter.Position;
_spaceLeft -= entrySize + TocEntrySize; // Include the block's toc entry
// Write the lookup information at the end of the block
blockWriter.Position = BlockSize - ((EntryCount + 1) * TocEntrySize);
blockWriter.WriteUInt16((ushort)entryOffset);
blockWriter.WriteUInt16((ushort)entry.GetEntryMetaSize());
blockWriter.WriteUInt16((ushort)entryMetaOffset);
blockWriter.WriteUInt16(entry.GetTypeMetaSize());
// Move on to next.
EntryCount++;
}