forked from stschake/eveDestiny
/
UpdateReader.cs
110 lines (90 loc) · 3.5 KB
/
UpdateReader.cs
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using System.Collections.Generic;
using System.IO;
using System.Text;
using eveUtility;
namespace eveDestiny
{
public class UpdateReader
{
public Header Header { get; private set; }
public List<Ball> Balls { get; private set; }
public void Read(Stream str)
{
ReadHeader(str);
Balls = new List<Ball>(5);
while (str.Position < str.Length)
Balls.Add(ReadBallFromStream(str));
}
private static Ball ReadBallFromStream(Stream str)
{
var ret = new Ball {Header = str.ReadStruct<BallHeader>()};
if (ret.Header.Mode != BallMode.Rigid)
ret.ExtraHeader = str.ReadStruct<ExtraBallHeader>();
if (ret.Header.Flags.HasFlag(BallFlag.IsFree))
ret.Data = str.ReadStruct<BallData>();
var reader = new BinaryReader(str);
ret.FormationId = reader.ReadByte();
switch (ret.Header.Mode)
{
case BallMode.Follow:
case BallMode.Orbit:
ret.FollowState = str.ReadStruct<FollowState>();
break;
case BallMode.Formation:
ret.FormationState = str.ReadStruct<FormationState>();
break;
case BallMode.Troll:
ret.TrollState = str.ReadStruct<TrollState>();
break;
case BallMode.Missile:
ret.MissileState = str.ReadStruct<MissileState>();
break;
case BallMode.Goto:
ret.GotoState = str.ReadStruct<GotoState>();
break;
case BallMode.Warp:
ret.WarpState = str.ReadStruct<WarpState>();
break;
case BallMode.Mushroom:
ret.MushroomState = str.ReadStruct<MushroomState>();
break;
case BallMode.Stop:
case BallMode.Field:
case BallMode.Rigid:
// no extra data for these
break;
}
if (ret.Header.Flags.HasFlag(BallFlag.HasMiniBalls))
ret.MiniBalls = ReadMiniBalls(reader);
ret.Name = ReadString(reader);
return ret;
}
private static string ReadString(BinaryReader reader)
{
byte nameWords = reader.ReadByte();
if (nameWords > 0)
{
var rawName = reader.ReadBytes(nameWords * 2);
return Encoding.Unicode.GetString(rawName);
}
return null;
}
private void ReadHeader(Stream str)
{
Header = str.ReadStruct<Header>();
if (Header.PacketType != 0 && Header.PacketType != 1)
throw new InvalidDataException("Unknown packet type; expected 0 or 1, got " + Header.PacketType);
}
private static MiniBall[] ReadMiniBalls(BinaryReader reader)
{
int extraCount = reader.ReadInt16();
var ret = new MiniBall[extraCount];
if (extraCount > 0)
{
for (int i = 0; i < extraCount; i++)
ret[i] = reader.ReadStruct<MiniBall>();
}
return ret;
}
}
}