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#ifndef JOS_MULTIBOOT2_INFORMATION_HPP
#define JOS_MULTIBOOT2_INFORMATION_HPP
#include "impl/data.hpp"
#include "impl/iterator.hpp"
#include "impl/tag.hpp"
#include <elf/format.hpp>
#include <elf/section_header.hpp>
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <optional>
#include <span>
#include <string_view>
namespace multiboot2
{
/**
* @copydoc multiboot2::impl::basic_memory_data
*/
struct basic_memory : impl::tag<impl::basic_memory_data>
{
using tag::tag;
};
/**
* @copydoc multiboot2::impl::bios_boot_device_data
*/
struct bios_boot_device : impl::tag<impl::bios_boot_device_data>
{
using tag::tag;
};
/**
* @copydoc multiboot2::impl::command_line_data
*/
struct command_line : impl::vla_tag<impl::command_line_data, char, std::basic_string_view>
{
using vla_tag::vla_tag;
/**
* @brief The command line string
*/
auto string() const noexcept -> range_type
{
return m_vla;
}
};
/**
* @copydoc multiboot2::impl::elf_symbols_data
*/
template<elf::format Format>
struct elf_symbols : impl::vla_tag<impl::elf_symbols_data, elf::section_header<Format> const, std::span>
{
using base = impl::vla_tag<impl::elf_symbols_data, elf::section_header<Format> const, std::span>;
using base::base;
using iterator = base::range_type::iterator;
auto data() const noexcept -> base::range_type
{
return this->m_vla;
}
};
/**
* @copydoc multiboot2::impl::loader_name_data
*/
struct loader_name : impl::vla_tag<impl::loader_name_data, char, std::basic_string_view>
{
using vla_tag::vla_tag;
/**
* @brief The name of the bootloader
*/
auto string() const noexcept -> std::string_view
{
return m_vla;
}
};
/**
* @copydoc multiboot2::impl::memory_map_data
*/
struct memory_map : impl::vla_tag<impl::memory_map_data, impl::memory_map_data::region, std::span>
{
using vla_tag::vla_tag;
using iterator = range_type::iterator;
auto begin() const noexcept -> iterator
{
return regions().begin();
}
auto end() const noexcept -> iterator
{
return regions().end();
}
/**
* @brief The available memory regions
*/
auto regions() const noexcept -> range_type
{
return m_vla;
}
};
struct information_view
{
using iterator = impl::information_iterator;
using value_type = impl::information_iterator::value_type;
using pointer = impl::information_iterator::pointer;
using reference = impl::information_iterator::reference;
auto size_bytes() const noexcept -> std::size_t
{
return m_size;
}
// Range access
auto begin() const noexcept -> iterator
{
return iterator{&m_tags};
}
auto end() const noexcept -> iterator
{
return iterator{};
}
// Tag access
template<typename Tag>
auto has() const noexcept -> bool
{
return get<Tag>().has_value();
}
auto maybe_basic_memory() const noexcept -> std::optional<basic_memory>
{
return get<multiboot2::basic_memory>();
}
auto basic_memory() const -> basic_memory
{
return maybe_basic_memory().value();
}
auto maybe_bios_boot_device() const noexcept -> std::optional<bios_boot_device>
{
return get<multiboot2::bios_boot_device>();
}
auto bios_boot_device() const -> bios_boot_device
{
return maybe_bios_boot_device().value();
}
auto maybe_command_line() const noexcept -> std::optional<command_line>
{
return get<multiboot2::command_line>();
}
auto command_line() const -> command_line
{
return maybe_command_line().value();
}
template<elf::format Format>
auto maybe_elf_symbols() const noexcept -> std::optional<elf_symbols<Format>>
{
return get<multiboot2::elf_symbols<Format>>();
}
template<elf::format Format>
auto elf_symbols() const -> elf_symbols<Format>
{
return maybe_elf_symbols<Format>().value();
}
auto maybe_loader_name() const noexcept -> std::optional<loader_name>
{
return get<multiboot2::loader_name>();
}
auto loader_name() const -> loader_name
{
return maybe_loader_name().value();
}
auto maybe_memory_map() const noexcept -> std::optional<memory_map>
{
return get<multiboot2::memory_map>();
}
auto memory_map() const -> memory_map
{
return maybe_memory_map().value();
}
private:
template<typename Tag>
constexpr auto get() const noexcept -> std::optional<Tag>
{
if (auto found = std::ranges::find_if(*this, [](auto tag) { return tag.information_id() == Tag::id; });
found != end())
{
return Tag{&*found};
}
return std::nullopt;
}
[[maybe_unused]] uint32_t const m_size{};
uint32_t : 32;
impl::tag_header const m_tags{};
};
} // namespace multiboot2
#endif
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