public Broadcast(Computer parent)
{
_parent = parent;
_packetQueue = new List<Packet>();
_packetPointer = 0;
_sendTimer = 0;
}
public void Enqueue(Computer sender, byte[] data)
{
if (_packetPointer == 0 || _packetQueue.Count >= 32)
return;
var distance = Util.Distance(sender.Body.Position, _parent.Body.Position);
_packetQueue.Add(new Packet(distance, sender.Body.Position, data));
}
public Radar(Computer parent)
{
_radarPointer = 0;
RadarData = new RadarRay[Program.RadarRays];
_timer = Program.Random.Next(UpdateEvery); // helps with stutter with lots of radars
_parent = parent;
}
public static int LookupSymbol(Computer computer, string name)
{
var debugInfo = computer.Code.DebugInfo;
if (debugInfo == null)
throw new WatchException(string.Format("Undefined: {0}", name));
var symbol = debugInfo.FindSymbol(name);
if (!symbol.HasValue)
throw new WatchException(string.Format("Undefined: {0}", name));
return symbol.Value.Address;
}
private IEnumerable<Line> Disassemble(Computer target, int ip)
{
var machine = target.Vm;
var debugInfo = target.Code.DebugInfo;
var instruction = new Instruction(machine);
var buffer = new byte[8];
while (true)
{
var instrAddr = machine.IP;
if (instrAddr >= machine.Memory.Length)
break;
ShipDebug.Line? nextLine = null;
if (debugInfo != null)
{
var symbol = debugInfo.FindSymbol(instrAddr);
if (symbol.HasValue && symbol.Value.Address == instrAddr)
yield return new Line(instrAddr, string.Format("< {0} >", symbol.Value.Name), false, 1);
nextLine = debugInfo.FindLine(instrAddr, 1);
}
var decodeFailed = false;
try
{
instruction.Decode();
}
catch
{
decodeFailed = true;
}
if (decodeFailed || !instruction.IsValid || (nextLine.HasValue && instrAddr + instruction.Length > nextLine.Value.Address))
{
if (nextLine.HasValue)
machine.IP = nextLine.Value.Address;
else
machine.IP += 4;
var read = 0;
while (instrAddr <= machine.IP)
{
if (instrAddr >= machine.Memory.Length)
break;
buffer[read++] = machine.Memory[instrAddr++];
if (read == buffer.Length || instrAddr == machine.IP)
{
if (read > 0)
{
var bufferStr = string.Join(", ", buffer.Take(read).Select(v => string.Format("0x{0:X2}", v)));
yield return new Line(instrAddr - read, string.Format(" db {0}", bufferStr), false, 8);
}
read = 0;
}
}
}
else
{
string sourceLine = null;
if (debugInfo != null)
{
var line = debugInfo.FindLine(instrAddr);
if (line.HasValue && line.Value.Address == instrAddr)
sourceLine = string.Format("{0}:{1}", line.Value.FileName, line.Value.LineNumber);
}
var fg = instrAddr == ip ? 4 : 0;
var bg = target.HasBreakpoint(instrAddr) ? 15 : 7;
yield return new Line(instrAddr, string.Format(" {0}", instruction), true, (byte)fg, (byte)bg, sourceLine);
machine.IP += instruction.Length;
}
}
}
public void Update(Computer target)
{
_scrollbar.Maximum = target.Vm.Memory.Length - (Height * 4);
_scrollbar.Value = Util.Clamp(_scrollbar.Value, _scrollbar.Minimum, _scrollbar.Maximum);
var debugInfo = target.Code.DebugInfo;
var offset = (int)_scrollbar.Value;
var originalIp = target.Vm.IP;
target.Vm.IP = offset;
if (debugInfo != null)
{
var prevLine = debugInfo.FindLine(offset, -1);
if (prevLine.HasValue)
target.Vm.IP = prevLine.Value.Address; // TODO: limit how far back this can go
}
_lines.Clear();
_lines.AddRange(Disassemble(target, originalIp).SkipWhile(l => l.Address < offset).Take((int)Height));
target.Vm.IP = originalIp;
}
