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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This file contains helpers for working with enums that require
// both enum->string and string->enum conversions.
#ifndef UTIL_ENUM_NAME_TABLE_H_
#define UTIL_ENUM_NAME_TABLE_H_
#include <array>
#include <utility>
#include "absl/strings/string_view.h"
#include "platform/base/error.h"
#include "util/osp_logging.h"
namespace openscreen {
constexpr char kUnknownEnumError[] = "Enum value not in array";
// TODO(jophba): move to a proper class once we can inherit from array
// properly (in C++17).
template <typename Enum, size_t Size>
using EnumNameTable = std::array<std::pair<const char*, Enum>, Size>;
// Get the name of an enum from the enum value.
template <typename Enum, size_t Size>
ErrorOr<const char*> GetEnumName(const EnumNameTable<Enum, Size>& map,
Enum enum_) {
for (auto pair : map) {
if (pair.second == enum_) {
return pair.first;
}
}
return Error(Error::Code::kParameterInvalid, kUnknownEnumError);
}
// Get the value of an enum from the enum name.
template <typename Enum, size_t Size>
ErrorOr<Enum> GetEnum(const EnumNameTable<Enum, Size>& map,
absl::string_view name) {
for (auto pair : map) {
if (pair.first == name) {
return pair.second;
}
}
return Error(Error::Code::kParameterInvalid, kUnknownEnumError);
}
} // namespace openscreen
#endif // UTIL_ENUM_NAME_TABLE_H_
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