NdsProgramDefinition.cs

namespace NdsForge;

public sealed class NdsProgramDefinition
{
    private ReadOnlyMemory<byte> _footer;

    public NdsProgramDefinition(
        NdsProcessor processor,
        ReadOnlySpan<byte> contents,
        uint loadAddress,
        uint entryAddress)
    {
        Processor = processor;
        Contents = contents.ToArray();
        LoadAddress = loadAddress;
        EntryAddress = entryAddress;
    }

    public NdsProcessor Processor { get; }

    public ReadOnlyMemory<byte> Contents { get; }

    public uint LoadAddress { get; }

    public uint EntryAddress { get; }

    public ReadOnlyMemory<byte> Footer => _footer;

    public NdsProgramDefinition SetFooter(ReadOnlySpan<byte> footer)
    {
        if (Processor != NdsProcessor.Arm9 || footer.Length != 12 || NdsBinary.ReadUInt32(footer, 0) != 0xDEC00621)
        {
            throw new InvalidDataException("An SDK footer must be a 12-byte ARM9 footer beginning with 0xDEC00621.");
        }
 
        _footer = footer.ToArray();
        return this;
    }
}