public static void WritePacketLength(this SpanWriter writer)
{
var length = writer.Position;
writer.Seek(1, SeekOrigin.Begin);
writer.Write((ushort)length);
writer.Seek(length, SeekOrigin.Begin);
}
public static int CreateMessageLocalized(
Span <byte> buffer,
Serial serial, int graphic, MessageType type, int hue, int font, int number, string name = "", string args = ""
)
{
name ??= "";
args ??= "";
if (hue == 0)
{
hue = 0x3B2;
}
var writer = new SpanWriter(buffer);
writer.Write((byte)0xC1);
writer.Seek(2, SeekOrigin.Current);
writer.Write(serial);
writer.Write((short)graphic);
writer.Write((byte)type);
writer.Write((short)hue);
writer.Write((short)font);
writer.Write(number);
writer.WriteAscii(name, 30);
writer.WriteLittleUniNull(args);
writer.WritePacketLength();
return(writer.Position);
}
public void Terminate()
{
int length = _position + 4;
if (length != _buffer.Length)
{
Resize(length);
}
var writer = new SpanWriter(_buffer);
writer.Seek(_position, SeekOrigin.Begin);
writer.Write(0);
writer.Seek(11, SeekOrigin.Begin);
writer.Write(_hash);
writer.WritePacketLength();
}
public static int CreateMessage(
Span <byte> buffer,
Serial serial,
int graphic,
MessageType type,
int hue,
int font,
bool ascii,
string lang,
string name,
string text
)
{
if (buffer[0] != 0)
{
return(buffer.Length);
}
name ??= "";
text ??= "";
lang ??= "ENU";
if (hue == 0)
{
hue = 0x3B2;
}
var writer = new SpanWriter(buffer);
writer.Write((byte)(ascii ? 0x1C : 0xAE)); // Packet ID
writer.Seek(2, SeekOrigin.Current);
writer.Write(serial);
writer.Write((short)graphic);
writer.Write((byte)type);
writer.Write((short)hue);
writer.Write((short)font);
if (ascii)
{
writer.WriteAscii(name, 30);
writer.WriteAsciiNull(text);
}
else
{
writer.WriteAscii(lang, 4);
writer.WriteAscii(name, 30);
writer.WriteBigUniNull(text);
}
writer.WritePacketLength();
return(writer.Position);
}
public ObjectPropertyList(IEntity e)
{
Entity = e;
_buffer = GC.AllocateUninitializedArray <byte>(64);
var writer = new SpanWriter(_buffer);
writer.Write((byte)0xD6); // Packet ID
writer.Seek(2, SeekOrigin.Current);
writer.Write((ushort)1);
writer.Write(e.Serial);
writer.Write((ushort)0);
_position = writer.Position + 4; // Hash
}
private static void WritePacked(ReadOnlySpan <byte> source, ref SpanWriter writer, out int length)
{
var size = source.Length;
var dest = writer.RawBuffer.Slice(writer.Position + 3);
length = dest.Length;
var ce = Zlib.Pack(dest, ref length, source, ZlibQuality.Default);
if (ce != ZlibError.Okay)
{
Console.WriteLine("ZLib error: {0} (#{1})", ce, (int)ce);
length = 0;
size = 0;
}
writer.Write((byte)size);
writer.Write((byte)length);
writer.Write((byte)(((size >> 4) & 0xF0) | ((length >> 8) & 0xF)));
writer.Seek(length, SeekOrigin.Current);
}
public void Add(int number, string arguments = null)
{
if (number == 0)
{
return;
}
arguments ??= "";
if (Header == 0)
{
Header = number;
HeaderArgs = arguments;
}
AddHash(number);
if (arguments.Length > 0)
{
AddHash(arguments.GetHashCode(StringComparison.Ordinal));
}
int strLength = Utility.Unicode.GetByteCount(arguments);
int length = _position + 6 + strLength;
while (length > _buffer.Length)
{
Flush();
}
var writer = new SpanWriter(_buffer);
writer.Seek(_position, SeekOrigin.Begin);
writer.Write(number);
writer.Write((ushort)strLength);
writer.WriteBigUni(arguments);
}
public static void WritePacketLength(this SpanWriter writer)
{
writer.Seek(1, SeekOrigin.Begin);
writer.Write((ushort)writer.BytesWritten);
writer.Seek(0, SeekOrigin.End);
}
(Zlib.MaxPackSize(stairsPerBuffer * stairsLength) + 4) * stairsCount; // 22602
public static byte[] CreateHouseDesignStateDetailed(uint serial, int revision, MultiComponentList components)
{
var xMin = components.Min.X;
var yMin = components.Min.Y;
var xMax = components.Max.X;
var yMax = components.Max.Y;
var tiles = components.List;
const int totalPlaneLength = planeLength * planeCount;
const int stairsBufferLength = stairsPerBuffer * stairsLength;
const int maxUnpackedSize = totalPlaneLength + stairsBufferLength * stairsCount;
using var inflatedWriter = new SpanWriter(maxUnpackedSize);
Span <bool> planesUsed = stackalloc bool[9];
var index = 0;
var stairsIndex = totalPlaneLength;
var totalStairsUsed = 0;
var width = xMax - xMin + 1;
var height = yMax - yMin + 1;
for (var i = 0; i < tiles.Length; ++i)
{
var mte = tiles[i];
var x = mte.OffsetX - xMin;
var y = mte.OffsetY - yMin;
int z = mte.OffsetZ;
var floor = TileData.ItemTable[mte.ItemId & TileData.MaxItemValue].Height <= 0;
int plane = z switch
{
0 => 0,
7 => 1,
27 => 2,
47 => 3,
67 => 4,
_ => - 1
};
if (plane > -1)
{
int size;
if (plane == 0)
{
size = height;
}
else if (floor)
{
size = height - 2;
x -= 1;
y -= 1;
}
else
{
size = height - 1;
plane += 4;
}
index = (x * size + y) * 2;
if (x >= 0 && y >= 0 && y < size && index + 1 < 0x400)
{
var planeUsed = planesUsed[plane];
if (!planeUsed)
{
inflatedWriter.Seek(plane * planeLength, SeekOrigin.Begin);
inflatedWriter.Clear(planeLength);
planesUsed[plane] = true;
}
inflatedWriter.Seek(index, SeekOrigin.Begin);
inflatedWriter.Write(mte.ItemId);
continue;
}
}
inflatedWriter.Seek(stairsIndex, SeekOrigin.Begin);
inflatedWriter.Write(mte.ItemId);
inflatedWriter.Write((byte)mte.OffsetX);
inflatedWriter.Write((byte)mte.OffsetY);
inflatedWriter.Write((byte)mte.OffsetZ);
stairsIndex = inflatedWriter.Position;
totalStairsUsed++;
}
var buffer = GC.AllocateUninitializedArray <byte>(maxPacketLength);
var writer = new SpanWriter(buffer);
writer.Write((byte)0xD8); // Packet ID
writer.Seek(2, SeekOrigin.Current); // Length
writer.Write((byte)0x03); // Compression Type
writer.Write((byte)0x00); // Unknown
writer.Write(serial);
writer.Write(revision);
writer.Write((short)tiles.Length);
writer.Seek(3, SeekOrigin.Current); // Buffer Length, Plane Count
var totalPlanes = 0;
var totalLength = 1; // includes plane count
for (var i = 0; i < planeCount; i++)
{
if (!planesUsed[i])
{
inflatedWriter.Seek(planeCount, SeekOrigin.Current);
continue;
}
int size = i switch
{
0 => width * height * 2,
< 5 => (width - 1) * (height - 2) * 2,
_ => width * (height - 1) * 2
};
var source = inflatedWriter.RawBuffer.Slice(i * planeLength, size);
writer.Write((byte)(0x20 | i));
WritePacked(source, ref writer, out int destLength);
totalLength += 4 + destLength;
totalPlanes++;
}
index = 0;
while (totalStairsUsed > 0)
{
var count = Math.Min(stairsPerBuffer, totalStairsUsed);
totalStairsUsed -= count;
var start = totalPlaneLength + index * stairsLength;
var size = count * 5;
var source = inflatedWriter.RawBuffer.Slice(start, size);
writer.Write((byte)(9 + index++));
WritePacked(source, ref writer, out int destLength);
totalLength += 4 + destLength;
totalPlanes++;
}
writer.Seek(15, SeekOrigin.Begin);
writer.Write((short)totalLength);
writer.Write((byte)totalPlanes);
writer.WritePacketLength();
// TODO: Avoid this somehow.
Array.Resize(ref buffer, writer.BytesWritten);
return(buffer);
}
public static void SendDisplayGump(this NetState ns, Gump gump, out int switches, out int entries)
{
switches = 0;
entries = 0;
if (ns == null)
{
return;
}
var packed = ns.Unpack;
var writer = new SpanWriter(512, true);
writer.Write((byte)(packed ? 0xDD : 0xB0)); // Packet ID
writer.Seek(2, SeekOrigin.Current);
writer.Write(gump.Serial);
writer.Write(gump.TypeID);
writer.Write(gump.X);
writer.Write(gump.Y);
var spanWriter = new SpanWriter(512, true);
if (!gump.Draggable)
{
spanWriter.Write(Gump.NoMove);
}
if (!gump.Closable)
{
spanWriter.Write(Gump.NoClose);
}
if (!gump.Disposable)
{
spanWriter.Write(Gump.NoDispose);
}
if (!gump.Resizable)
{
spanWriter.Write(Gump.NoResize);
}
var stringsList = new OrderedHashSet <string>(11);
foreach (var entry in gump.Entries)
{
entry.AppendTo(ref spanWriter, stringsList, ref entries, ref switches);
}
if (packed)
{
spanWriter.Write((byte)0); // Layout text terminator
WritePacked(ref writer, spanWriter.Span);
}
else
{
writer.Write((ushort)spanWriter.BytesWritten);
writer.Write(spanWriter.Span);
}
if (packed)
{
writer.Write(stringsList.Count);
}
else
{
writer.Write((ushort)stringsList.Count);
}
spanWriter.Seek(0, SeekOrigin.Begin);
foreach (var str in stringsList)
{
var s = str ?? "";
spanWriter.Write((ushort)s.Length);
spanWriter.WriteBigUni(s);
}
if (packed)
{
WritePacked(ref writer, spanWriter.Span);
}
else
{
writer.Write(spanWriter.Span);
}
writer.WritePacketLength();
ns.Send(writer.Span);
spanWriter.Dispose(); // Can't use using and refs, so we dispose manually
}
