private void UpdateCache(IDisposable scope, IReadOnlyList <byte> data)
{
previousScope = scope;
cache = new IDataFormat[Length];
int start = Start;
var cacheIndex = 4;
var decompressedLength = ReadHeader(data, ref start);
cache[0] = new LzMagicIdentifier(Start);
cache[1] = new Integer(Start + 1, 0, decompressedLength, 3);
cache[2] = new Integer(Start + 1, 1, decompressedLength, 3);
cache[3] = new Integer(Start + 1, 2, decompressedLength, 3);
while (cacheIndex < cache.Length)
{
cache[cacheIndex] = new LzGroupHeader(start);
var bitfield = data[start];
cacheIndex++;
start++;
for (int i = 0; i < 8 && cacheIndex < cache.Length; i++)
{
if (IsNextTokenCompressed(ref bitfield))
{
if (cacheIndex + 2 > cache.Length)
{
cache[cacheIndex] = new LzUncompressed(start);
cacheIndex++;
}
else
{
var(runLength, runOffset) = ReadCompressedToken(data, ref start);
cache[cacheIndex + 0] = new LzCompressed(start - 2, 0, runLength, runOffset);
cache[cacheIndex + 1] = new LzCompressed(start - 2, 1, runLength, runOffset);
cacheIndex += 2;
}
}
else
{
cache[cacheIndex] = new LzUncompressed(start);
cacheIndex++;
start++;
}
}
}
}
public void Visit(LzGroupHeader lz, byte data)
{
if (!CurrentText.EndsWith(" "))
{
return;
}
if (byte.TryParse(CurrentText, NumberStyles.HexNumber, CultureInfo.CurrentCulture.NumberFormat, out var result))
{
var oldValue = Model[memoryLocation];
CurrentChange.ChangeData(Model, memoryLocation, result);
var run = (LZRun)Model.GetNextRun(memoryLocation);
int runIndex = memoryLocation - run.Start;
Result = true;
if (!TryFixupLzRun(ref run, runIndex + 1))
{
CurrentChange.ChangeData(Model, memoryLocation, oldValue);
ErrorText = $"Could not write header {result:X2} without making the compressed data invalid.";
}
else
{
NewDataIndex = run.Start + runIndex + 1;
}
}
}
public void Visit(LzGroupHeader lz, byte data) => Visit((None)null, data);
public void Visit(LzGroupHeader lz, byte data)
{
}