80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <map>
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#include <optional>
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#include <set>
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#include <string>
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namespace android {
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template <typename T>
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std::string constToString(const T& v) {
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return std::to_string(v);
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}
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/**
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* Convert an optional type to string.
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*/
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template <typename T>
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std::string toString(const std::optional<T>& optional,
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std::string (*toString)(const T&) = constToString) {
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return optional ? toString(*optional) : "<not set>";
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}
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/**
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* Convert a set of integral types to string.
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*/
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template <typename T>
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std::string dumpSet(const std::set<T>& v, std::string (*toString)(const T&) = constToString) {
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std::string out;
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for (const T& entry : v) {
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out += out.empty() ? "{" : ", ";
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out += toString(entry);
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}
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return out.empty() ? "{}" : (out + "}");
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}
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/**
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* Convert a map to string. Both keys and values of the map should be integral type.
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*/
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template <typename K, typename V>
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std::string dumpMap(const std::map<K, V>& map, std::string (*keyToString)(const K&) = constToString,
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std::string (*valueToString)(const V&) = constToString) {
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std::string out;
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for (const auto& [k, v] : map) {
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if (!out.empty()) {
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out += "\n";
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}
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out += keyToString(k) + ":" + valueToString(v);
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}
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return out;
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}
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const char* toString(bool value);
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/**
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* Add "prefix" to the beginning of each line in the provided string
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* "str".
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* The string 'str' is typically multi-line.
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* The most common use case for this function is to add some padding
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* when dumping state.
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*/
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std::string addLinePrefix(std::string str, const std::string& prefix);
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} // namespace android
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