blob: 5d98f52237776d4f03ee87e9630028c267d8f702 [file] [log] [blame]
#pragma once
#include <filesystem>
#include <functional>
#include <optional>
#include <ostream>
#include <string>
#include <string_view>
#include <unordered_map>
#include <vector>
namespace phosphor
{
namespace network
{
namespace config
{
/** @brief Compare in (case insensitive) vs expected (sensitive) */
bool icaseeq(std::string_view in, std::string_view expected) noexcept;
/** @brief Turns a systemd bool string into a c++ bool */
std::optional<bool> parseBool(std::string_view in) noexcept;
namespace fs = std::filesystem;
fs::path pathForIntfConf(const fs::path& dir, std::string_view intf);
fs::path pathForIntfDev(const fs::path& dir, std::string_view intf);
template <typename T, typename Check>
class Checked
{
public:
struct unchecked
{
};
template <typename... Args>
constexpr Checked(Args&&... args) : t(conCheck(std::forward<Args>(args)...))
{
}
template <typename... Args>
constexpr Checked(unchecked, Args&&... args) :
t(std::forward<Args>(args)...)
{
}
constexpr const T& get() const noexcept
{
return t;
}
constexpr operator const T&() const noexcept
{
return t;
}
constexpr bool operator==(const auto& rhs) const noexcept
{
return t == rhs;
}
private:
T t;
template <typename... Args>
static constexpr T conCheck(Args&&... args)
{
T t(std::forward<Args>(args)...);
Check{}(t);
return t;
}
};
template <typename T, typename Check>
constexpr bool operator==(const auto& lhs,
const Checked<T, Check>& rhs) noexcept
{
return lhs == rhs.get();
}
template <typename T, typename Check>
inline std::ostream& operator<<(std::ostream& s, const Checked<T, Check>& rhs)
{
return s << rhs.get();
}
struct KeyCheck
{
void operator()(std::string_view s);
};
struct SectionCheck
{
void operator()(std::string_view s);
};
struct ValueCheck
{
void operator()(std::string_view s);
};
struct string_hash : public std::hash<std::string_view>
{
using is_transparent = void;
template <typename T>
inline size_t operator()(const Checked<std::string, T>& t) const
{
return static_cast<const std::hash<std::string_view>&>(*this)(t.get());
}
template <typename T>
inline size_t operator()(const T& t) const
{
return static_cast<const std::hash<std::string_view>&>(*this)(t);
}
};
using Key = Checked<std::string, KeyCheck>;
using Section = Checked<std::string, SectionCheck>;
using Value = Checked<std::string, ValueCheck>;
using ValueList = std::vector<Value>;
using KeyValuesMap =
std::unordered_map<Key, ValueList, string_hash, std::equal_to<>>;
using KeyValuesMapList = std::vector<KeyValuesMap>;
using SectionMapInt =
std::unordered_map<Section, KeyValuesMapList, string_hash, std::equal_to<>>;
class SectionMap : public SectionMapInt
{
public:
const std::string* getLastValueString(std::string_view section,
std::string_view key) const noexcept;
inline auto getValues(std::string_view section, std::string_view key,
auto&& conv) const
{
std::vector<std::invoke_result_t<decltype(conv), const Value&>> values;
auto sit = find(section);
if (sit == end())
{
return values;
}
for (const auto& secv : sit->second)
{
auto kit = secv.find(key);
if (kit == secv.end())
{
continue;
}
for (auto v : kit->second)
{
values.push_back(conv(v));
}
}
return values;
}
std::vector<std::string> getValueStrings(std::string_view section,
std::string_view key) const;
};
class Parser
{
public:
SectionMap map;
Parser() = default;
/** @brief Constructor
* @param[in] filename - Absolute path of the file which will be parsed.
*/
Parser(const fs::path& filename);
/** @brief Determine if there were warnings parsing the file
* @return The number of parsing issues in the file
*/
inline const std::vector<std::string>& getWarnings() const noexcept
{
return warnings;
}
/** @brief Get the filename last parsed successfully
* @return file path
*/
inline const fs::path& getFilename() const noexcept
{
return filename;
}
/** @brief Set the file name and parse it.
* @param[in] filename - Absolute path of the file.
*/
void setFile(const fs::path& filename);
/** @brief Write the current config to a file */
void writeFile() const;
void writeFile(const fs::path& filename);
private:
fs::path filename;
std::vector<std::string> warnings;
};
} // namespace config
} // namespace network
} // namespace phosphor