eecb9244dd
It's name is too generic despite it's narrow specialization. Also, there's a version_from_string() method that does the same in a more convenient way. Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2017-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdexcept>
|
|
#include <type_traits>
|
|
#include <seastar/core/sstring.hh>
|
|
#include <seastar/core/enum.hh>
|
|
|
|
namespace sstables {
|
|
|
|
enum class sstable_version_types { ka, la, mc, md, me };
|
|
enum class sstable_format_types { big };
|
|
|
|
constexpr std::array<sstable_version_types, 5> all_sstable_versions = {
|
|
sstable_version_types::ka,
|
|
sstable_version_types::la,
|
|
sstable_version_types::mc,
|
|
sstable_version_types::md,
|
|
sstable_version_types::me,
|
|
};
|
|
|
|
constexpr std::array<sstable_version_types, 3> writable_sstable_versions = {
|
|
sstable_version_types::mc,
|
|
sstable_version_types::md,
|
|
sstable_version_types::me,
|
|
};
|
|
|
|
constexpr sstable_version_types oldest_writable_sstable_format = sstable_version_types::mc;
|
|
|
|
template <size_t S1, size_t S2>
|
|
constexpr bool check_sstable_versions(const std::array<sstable_version_types, S1>& all_sstable_versions,
|
|
const std::array<sstable_version_types, S2>& writable_sstable_versions, sstable_version_types oldest_writable_sstable_format) {
|
|
for (auto v : writable_sstable_versions) {
|
|
if (v < oldest_writable_sstable_format) {
|
|
return false;
|
|
}
|
|
}
|
|
size_t expected = 0;
|
|
for (auto v : all_sstable_versions) {
|
|
if (v >= oldest_writable_sstable_format) {
|
|
++expected;
|
|
}
|
|
}
|
|
return expected == S2;
|
|
}
|
|
|
|
static_assert(check_sstable_versions(all_sstable_versions, writable_sstable_versions, oldest_writable_sstable_format));
|
|
|
|
inline auto get_highest_sstable_version() {
|
|
return all_sstable_versions[all_sstable_versions.size() - 1];
|
|
}
|
|
|
|
sstable_version_types version_from_string(std::string_view s);
|
|
sstable_format_types format_from_string(std::string_view s);
|
|
|
|
extern const std::unordered_map<sstable_version_types, seastar::sstring, seastar::enum_hash<sstable_version_types>> version_string;
|
|
extern const std::unordered_map<sstable_format_types, seastar::sstring, seastar::enum_hash<sstable_format_types>> format_string;
|
|
|
|
|
|
inline int operator<=>(sstable_version_types a, sstable_version_types b) {
|
|
auto to_int = [] (sstable_version_types x) {
|
|
return static_cast<std::underlying_type_t<sstable_version_types>>(x);
|
|
};
|
|
return to_int(a) - to_int(b);
|
|
}
|
|
|
|
}
|
|
|
|
template <>
|
|
struct fmt::formatter<sstables::sstable_version_types> : fmt::formatter<std::string_view> {
|
|
template <typename FormatContext>
|
|
auto format(const sstables::sstable_version_types& version, FormatContext& ctx) const {
|
|
return fmt::format_to(ctx.out(), "{}", sstables::version_string.at(version));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct fmt::formatter<sstables::sstable_format_types> : fmt::formatter<std::string_view> {
|
|
template <typename FormatContext>
|
|
auto format(const sstables::sstable_format_types& format, FormatContext& ctx) const {
|
|
return fmt::format_to(ctx.out(), "{}", sstables::format_string.at(format));
|
|
}
|
|
};
|