public static void Process(Context ctx)
{
using (IStorage deltaFile = new LocalStorage(ctx.Options.InFile, FileAccess.Read))
{
IStorage deltaStorage = deltaFile;
Span <byte> magic = stackalloc byte[4];
deltaFile.Read(0, magic).ThrowIfFailure();
if (MemoryMarshal.Read <uint>(magic) != Ndv0Magic)
{
try
{
var nca = new Nca(ctx.Keyset, deltaStorage);
IFileSystem fs = nca.OpenFileSystem(0, IntegrityCheckLevel.ErrorOnInvalid);
if (!fs.FileExists(FragmentFileName))
{
throw new FileNotFoundException("Specified NCA does not contain a delta fragment");
}
fs.OpenFile(out IFile deltaFragmentFile, FragmentFileName.ToU8String(), OpenMode.Read).ThrowIfFailure();
deltaStorage = deltaFragmentFile.AsStorage();
}
catch (InvalidDataException) { } // Ignore non-NCA3 files
}
var delta = new Delta(deltaStorage);
if (ctx.Options.BaseFile != null)
{
using (IStorage baseFile = new LocalStorage(ctx.Options.BaseFile, FileAccess.Read))
{
delta.SetBaseStorage(baseFile);
if (ctx.Options.OutFile != null)
{
using (var outFile = new FileStream(ctx.Options.OutFile, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
IStorage patchedStorage = delta.GetPatchedStorage();
patchedStorage.GetSize(out long patchedStorageSize).ThrowIfFailure();
patchedStorage.CopyToStream(outFile, patchedStorageSize, ctx.Logger);
}
}
}
}
ctx.Logger.LogMessage(delta.Print());
}
}
