public void Visit(LzCompressed lz, byte data)
{
var start = index;
(int runLength, int runOffset) = LZRun.ReadCompressedToken(buffer, ref start);
Result = $"{runLength}:{runOffset}";
}
public void Visit(LzCompressed lz, byte data)
{
if (!CurrentText.EndsWith(" "))
{
return;
}
var sections = CurrentText.Trim().Split(":");
if (sections.Length != 2)
{
return;
}
if (!int.TryParse(sections[0], out int runLength))
{
return;
}
if (!int.TryParse(sections[1], out int runOffset))
{
return;
}
Result = true;
if (runLength < 3 || runLength > 18)
{
ErrorText = "Run Length must be > 2 and < 19";
return;
}
else if (runOffset < 1 || runOffset > 0x1000)
{
ErrorText = "Run Offset must be > 0 and <= 4096";
return;
}
var result = LZRun.CompressedToken((byte)runLength, (short)runOffset);
var previousValue = Model.ReadMultiByteValue(memoryLocation, 2);
CurrentChange.ChangeData(Model, memoryLocation, result[0]);
CurrentChange.ChangeData(Model, memoryLocation + 1, result[1]);
var run = (LZRun)Model.GetNextRun(memoryLocation);
int runIndex = memoryLocation - run.Start;
if (!TryFixupLzRun(ref run, runIndex + 2))
{
Model.WriteMultiByteValue(memoryLocation, 2, CurrentChange, previousValue);
ErrorText = $"Could not write {runLength}:{runOffset} without making the compressed data invalid.";
}
else
{
NewDataIndex = run.Start + runIndex + 2;
}
}
public void ValidHeaderIsRecognized()
{
var data = new byte[] { 0x10, 8, 0, 0, 0b000000, 0, 0, 0, 0, 0, 0, 0, 0 };
Assert.NotEqual(-1, LZRun.IsCompressedLzData(data, 0));
}
