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