registry_win32.hpp

// Copyright Take Vos 2022.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../utility/module.hpp"
#include <string_view>
#include <string>
#include <vector>
#include <cstdint>
#include <optional>
 
namespace hi::inline v1 {
 
enum class registry_key { classes_root, current_config, current_user, local_machine, users };
 
bool registry_delete(registry_key key, std::string_view path, std::string_view name);
 
bool registry_delete(registry_key key, std::string_view path);
 
[[nodiscard]] void registry_write(registry_key key, std::string_view path, std::string_view name, uint32_t value);
 
[[nodiscard]] void registry_write(registry_key key, std::string_view path, std::string_view name, std::string_view value);
 
[[nodiscard]] bool registry_exists(registry_key key, std::string_view path, std::string_view name);
 
[[nodiscard]] std::optional<uint32_t> registry_read_dword(registry_key key, std::string_view path, std::string_view name);
 
[[nodiscard]] std::optional<std::string> registry_read_string(registry_key key, std::string_view path, std::string_view name);
 
[[nodiscard]] std::optional<std::vector<std::string>>
registry_read_multi_string(registry_key key, std::string_view path, std::string_view name);
 
template<typename T>
[[nodiscard]] std::optional<T> registry_read(registry_key key, std::string_view path, std::string_view name) = delete;
 
template<std::integral T>
[[nodiscard]] inline std::optional<T> registry_read(registry_key key, std::string_view path, std::string_view name)
{
    if (hilet tmp = registry_read_dword(key, path, name)) {
        return narrow_cast<T>(*tmp);
    } else {
        return std::nullopt;
    }
}
 
template<>
[[nodiscard]] inline std::optional<std::string> registry_read(registry_key key, std::string_view path, std::string_view name)
{
    return registry_read_string(key, path, name);
}
 
template<>
[[nodiscard]] inline std::optional<std::vector<std::string>>
registry_read(registry_key key, std::string_view path, std::string_view name)
{
    return registry_read_multi_string(key, path, name);
}
 
} // namespace hi::inline v1