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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 <bitset>
#include <map>
#include <optional>
#include <set>
#include <sstream>
#include <string>
#include <vector>
namespace android {
template <size_t N>
std::string bitsetToString(const std::bitset<N>& bitset) {
if (bitset.none()) {
return "<none>";
}
return bitset.to_string();
}
template <class T>
std::string streamableToString(const T& streamable) {
std::stringstream out;
out << streamable;
return out.str();
}
template <typename T>
inline std::string constToString(const T& v) {
return std::to_string(v);
}
template <>
inline std::string constToString(const bool& value) {
return value ? "true" : "false";
}
template <>
inline std::string constToString(const std::vector<bool>::reference& value) {
return value ? "true" : "false";
}
inline std::string constToString(const std::string& s) {
return s;
}
/**
* Convert an optional type to string.
*/
template <typename T>
inline 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 or multimap to string. Both keys and values of the map should be integral type.
*/
template <typename T>
std::string dumpMap(const T& map,
std::string (*keyToString)(const typename T::key_type&) = constToString,
std::string (*valueToString)(const typename T::mapped_type&) = constToString) {
std::string out;
for (const auto& [k, v] : map) {
if (!out.empty()) {
out += "\n";
}
out += keyToString(k) + ":" + valueToString(v);
}
return out;
}
/**
* Convert map keys to string. The keys of the map should be integral type.
*/
template <typename K, typename V>
std::string dumpMapKeys(const std::map<K, V>& map,
std::string (*keyToString)(const K&) = constToString) {
std::string out;
for (const auto& [k, _] : map) {
out += out.empty() ? "{" : ", ";
out += keyToString(k);
}
return out.empty() ? "{}" : (out + "}");
}
/** Convert a vector to a string. */
template <typename T>
std::string dumpVector(const std::vector<T>& values,
std::string (*valueToString)(const T&) = constToString) {
std::string dump = valueToString(values[0]);
for (size_t i = 1; i < values.size(); i++) {
dump += ", " + valueToString(values[i]);
}
return dump;
}
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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