public Bktr(Stream patchRomfs, Stream baseRomfs, NcaSection section)
{
if (section.Header.EncryptionType != NcaEncryptionType.AesCtrEx)
{
throw new ArgumentException("Section is not of type BKTR");
}
Patch = patchRomfs ?? throw new NullReferenceException($"{nameof(patchRomfs)} cannot be null");
Base = baseRomfs ?? throw new NullReferenceException($"{nameof(baseRomfs)} cannot be null");
IvfcLevelHeader level5 = section.Header.IvfcInfo.LevelHeaders[5];
Length = level5.LogicalOffset + level5.HashDataSize;
using (var reader = new BinaryReader(patchRomfs, Encoding.Default, true))
{
patchRomfs.Position = section.Header.BktrInfo.RelocationHeader.Offset;
RelocationBlock = new RelocationBlock(reader);
}
foreach (RelocationBucket bucket in RelocationBlock.Buckets)
{
RelocationEntries.AddRange(bucket.Entries);
}
for (int i = 0; i < RelocationEntries.Count - 1; i++)
{
RelocationEntries[i].Next = RelocationEntries[i + 1];
RelocationEntries[i].VirtOffsetEnd = RelocationEntries[i + 1].VirtOffset;
}
RelocationEntries[RelocationEntries.Count - 1].VirtOffsetEnd = level5.LogicalOffset + level5.HashDataSize;
RelocationOffsets = RelocationEntries.Select(x => x.VirtOffset).ToList();
CurrentEntry = GetRelocationEntry(0);
UpdateSourceStreamPositions();
}