#include "binfmt/BinaryFormat.h"
#include "binfmt/ELF.h"
#include "binfmt/Script.h"

struct BinaryFormatDescriptor
{
    binfmt_loader_creator_t creator;
    void* arg;
};

Vector<BinaryFormatDescriptor> g_binary_formats;

Result<void> BinaryFormat::init()
{
    TRY(register_binary_format(ELFLoader::create, nullptr));
    TRY(register_binary_format(ScriptLoader::create, nullptr));

    return {};
}

Result<void> BinaryFormat::register_binary_format(binfmt_loader_creator_t creator, void* arg)
{
    return g_binary_formats.try_append({ creator, arg });
}

Result<SharedPtr<BinaryFormatLoader>> BinaryFormat::create_loader(SharedPtr<VFS::Inode> inode)
{
    for (const auto& format : g_binary_formats)
    {
        auto loader = TRY(format.creator(inode, format.arg));
        if (TRY(loader->sniff())) return loader;
    }

    return err(ENOEXEC);
}

BinaryFormatLoader::BinaryFormatLoader(SharedPtr<VFS::Inode> inode) : m_inode(inode)
{
}