public GameObjectPropertyTable(Machine machine, int startingAddress)
{
if (machine == null)
{
throw new ArgumentNullException(nameof(machine));
}
this.machine = machine;
var location = machine.Memory.SpanAt(startingAddress);
var textLength = location.Bytes[0] * 2;
var decoder = new ZStringDecoder(machine);
Description = decoder.Decode(location.Forward(1)).Text;
Properties = new Dictionary <int, GameObjectProperty>();
var propertyEntry = machine.Memory.MemoryAt(startingAddress + textLength + 1);
while (propertyEntry.Bytes.Span[0] != 0)
{
var property = new GameObjectProperty(machine, propertyEntry);
var nextEntryAddress = propertyEntry.Address + property.Size + 1;
if (machine.Version > 3)
{
throw new NotImplementedException("Need to adjust prope entry size for 2 size bytes senario");
}
Properties.Add(property.Number, property);
propertyEntry = machine.Memory.MemoryAt(nextEntryAddress);
}
}
public DecodedString Decode(SpanLocation location)
{
var decoder = new ZStringDecoder(machine);
var result = decoder.Decode(location);
return(result);
}
public void AbbreviationsMakeSense()
{
using var file = File.OpenRead(@"Data\ZORK1.DAT");
var logger = NullLoggerFactory.GetLogger();
var machine = new Machine(logger, new SolveZorkInputStream());
machine.Load(file);
logger.Error($"ABBREVIATIONS");
var decoder = new ZStringDecoder(machine);
for (var index = 1; index <= 3; index++)
{
for (var number = 0; number < 32; number++)
{
var offset = (32 * (index - 1)) + (number * 2);
logger.Error($"For [{index}][{number}] the offset is {offset}");
var ppAbbreviation = machine.Memory.WordAt(Header.ABBREVIATIONS);
logger.Error($"For [{index}][{number}] the ppointer is {ppAbbreviation:X}");
var pAbbreviation = machine.Memory.WordAddressAt(ppAbbreviation + offset);
logger.Error($"For [{index}][{number}] the pointer is {pAbbreviation:X}");
var location = machine.Memory.SpanAt(pAbbreviation);
var result = decoder.Decode(location).Text;
logger.Error($"Abbreviation [{index}][{number}] : {result}");
}
}
}
public void PrintPaddr(SpanLocation location)
{
var address = Operands[0].Value;
var unpacked = machine.Memory.Unpack(address);
var stringDecoder = new ZStringDecoder(machine);
var text = stringDecoder.Decode(machine.Memory.SpanAt(unpacked));
machine.Output.Write(Text);
log.Debug($"\tPrintPaddr @ {unpacked:X}");
machine.SetPC(location.Address + Size);
}
public void CanDecodePairOfHands()
{
using var file = File.OpenRead(@"Data\ZORK1.DAT");
var logger = NullLoggerFactory.GetLogger();
var machine = new Machine(logger, new SolveZorkInputStream());
machine.Load(file);
var decoder = new ZStringDecoder(machine);
Assert.Equal("pair of hands", decoder.Decode(machine.Memory.SpanAt(0xBB9)).Text);
}
public void CanDecodeTenBit()
{
using var file = File.OpenRead(@"Data\ZORK1.DAT");
var logger = NullLoggerFactory.GetLogger();
var machine = new Machine(logger, new SolveZorkInputStream());
machine.Load(file);
var decoder = new ZStringDecoder(machine);
var result = decoder.Decode(machine.Memory.SpanAt(0x5908)).Text;
Assert.Equal(">", result);
}
