NdsOverlay.cs

namespace NdsForge;

public sealed class NdsOverlay
{
    internal NdsOverlay(NdsProcessor processor, ReadOnlySpan<byte> data, NdsFileSystem fileSystem)
    {
        Processor = processor;
        Id = NdsBinary.ReadUInt32(data, 0x00);
        LoadAddress = NdsBinary.ReadUInt32(data, 0x04);
        RamSize = NdsBinary.ReadUInt32(data, 0x08);
        BssSize = NdsBinary.ReadUInt32(data, 0x0C);
        StaticInitializerStart = NdsBinary.ReadUInt32(data, 0x10);
        StaticInitializerEnd = NdsBinary.ReadUInt32(data, 0x14);
        FileId = NdsBinary.ReadUInt32(data, 0x18);
        uint flagsAndSize = NdsBinary.ReadUInt32(data, 0x1C);
        CompressedSize = flagsAndSize & 0x00FF_FFFF;
        Flags = (byte)(flagsAndSize >> 24);
 
        if (FileId < fileSystem.Allocations.Count)
        {
            Data = fileSystem.Allocations[checked((int)FileId)].Data;
            fileSystem.TryGetFile(checked((int)FileId), out NdsFile? namedFile);
            File = namedFile;
        }
    }

    public NdsProcessor Processor { get; }

    public uint Id { get; }

    public uint LoadAddress { get; }

    public uint RamSize { get; }

    public uint BssSize { get; }

    public uint StaticInitializerStart { get; }

    public uint StaticInitializerEnd { get; }

    public uint FileId { get; }

    public uint CompressedSize { get; }

    public byte Flags { get; }

    public NdsRegion? Data { get; }

    public NdsFile? File { get; }
}