private ReadOnlySpan <char> AppendNewline(ReadOnlySpan <char> chars) { m_buffer.Clear(); m_buffer.Fill(chars.Length + Environment.NewLine.Length, default); chars.CopyTo(m_buffer.AsSpan()); Environment.NewLine.AsSpan().CopyTo(m_buffer.AsSpan().Slice(chars.Length)); return(m_buffer.AsSpan()); }
/// <summary> /// Get a span of values at the given ID. /// </summary> protected Span <TValue> GetSpan(TId id) { int offset = Offsets[id.FromId() - 1]; int count = SingleValues[id.FromId() - 1]; return(MultiValues.AsSpan().Slice(offset, count)); }
/// <summary> /// Get a span of values at the given ID. /// </summary> private Span <TValue> GetSpan(TId id) { int offset = Offsets[id.Value - 1]; int count = SingleValues[id.Value - 1]; return(MultiValues.AsSpan().Slice(offset, count)); }
/// <summary> /// All relationships have been added; sort them all and build the final relation table. /// </summary> public void Complete() { m_list.AsSpan().Sort((tuple1, tuple2) => { int fromIdCompare = tuple1.fromId.FromId().CompareTo(tuple2.fromId.FromId()); if (fromIdCompare != 0) { return(fromIdCompare); } return(tuple1.toId.FromId().CompareTo(tuple2.toId.FromId())); }); // and bin them by groups int listIndex = 0; SpannableList <TToId> buffer = new SpannableList <TToId>(); int listCount = m_list.Count; Table.SetMultiValueCapacity(listCount); foreach (TFromId id in Table.BaseTableOpt.Ids) { if (listIndex >= m_list.Count) { // ran outta entries, rest all 0 break; } // Count up how many are for id. int count = 0; buffer.Clear(); // create a to-ID that will never equal any other ID (even default) TToId lastToId = default(TToId).ToId(-1); while (listIndex + count < m_list.Count) { var(fromId, toId) = m_list[listIndex + count]; if (fromId.Equals(id)) { // drop duplicates (silently...) // TODO: are duplicates here a logic bug? Because they do happen in practice. if (!toId.Equals(lastToId)) { buffer.Add(toId); } count++; lastToId = toId; continue; } // ok we're done break; } Table.Add(buffer.AsSpan()); listIndex += count; } }
/// <summary> /// Save this list of unmanaged values to the given filename in the given directory. /// </summary> public static void SaveToFile <TValue>(string directory, string name, SpannableList <TValue> values) where TValue : unmanaged { string path = Path.Combine(directory, name); using (Stream writer = File.OpenWrite(path)) { // kind of a lot of work to write out an int, but whatevs int[] length = new int[] { values.Count }; writer.Write(MemoryMarshal.Cast <int, byte>(new Span <int>(length))); writer.Write(MemoryMarshal.Cast <TValue, byte>(values.AsSpan())); } }
/// <summary> /// Load a list of unmanaged values from the given filename in the given directory. /// </summary> public static void LoadFromFile <TValue>(string directory, string name, SpannableList <TValue> values) where TValue : unmanaged { values.Clear(); string path = Path.Combine(directory, name); using (Stream reader = File.OpenRead(path)) { int[] lengthBuf = new int[1]; reader.Read(MemoryMarshal.Cast <int, byte>(new Span <int>(lengthBuf))); int length = lengthBuf[0]; values.Capacity = length; values.Fill(length, default); Span <TValue> valueSpan = values.AsSpan(); Span <byte> byteValueSpan = MemoryMarshal.Cast <TValue, byte>(valueSpan); reader.Read(byteValueSpan); } }