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/*
* Copyright (C) 2019 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 <android-base/macros.h>
#include <android-base/parsedouble.h>
#include <android-base/properties.h>
#include <log/log.h>
#include <fstream>
#include <map>
#include <sstream>
namespace aidl {
namespace android {
namespace hardware {
namespace vibrator {
namespace utils {
template <typename T>
class Is_Iterable {
private:
template <typename U>
static std::true_type test(typename U::iterator *u);
template <typename U>
static std::false_type test(U *u);
public:
static const bool value = decltype(test<T>(0))::value;
};
template <typename T, bool B>
using Enable_If_Iterable = std::enable_if_t<Is_Iterable<T>::value == B>;
template <typename T, typename U = void>
using Enable_If_Signed = std::enable_if_t<std::is_signed_v<T>, U>;
template <typename T, typename U = void>
using Enable_If_Unsigned = std::enable_if_t<std::is_unsigned_v<T>, U>;
// override for default behavior of printing as a character
inline std::ostream &operator<<(std::ostream &stream, const int8_t value) {
return stream << +value;
}
// override for default behavior of printing as a character
inline std::ostream &operator<<(std::ostream &stream, const uint8_t value) {
return stream << +value;
}
template <typename T>
inline auto toUnderlying(const T value) {
return static_cast<std::underlying_type_t<T>>(value);
}
template <typename T>
inline Enable_If_Iterable<T, true> unpack(std::istream &stream, T *value) {
for (auto &entry : *value) {
stream >> entry;
}
}
template <typename T>
inline Enable_If_Iterable<T, false> unpack(std::istream &stream, T *value) {
stream >> *value;
}
template <>
inline void unpack<std::string>(std::istream &stream, std::string *value) {
*value = std::string(std::istreambuf_iterator(stream), {});
stream.setstate(std::istream::eofbit);
}
template <typename T>
inline Enable_If_Signed<T, T> getProperty(const std::string &key, const T def) {
if (std::is_floating_point_v<T>) {
float result;
std::string value = ::android::base::GetProperty(key, "");
if (!value.empty() && ::android::base::ParseFloat(value, &result)) {
return result;
}
return def;
} else {
return ::android::base::GetIntProperty(key, def);
}
}
template <typename T>
inline Enable_If_Unsigned<T, T> getProperty(const std::string &key, const T def) {
return ::android::base::GetUintProperty(key, def);
}
template <>
inline bool getProperty<bool>(const std::string &key, const bool def) {
return ::android::base::GetBoolProperty(key, def);
}
template <typename T>
static void openNoCreate(const std::string &file, T *outStream) {
auto mode = std::is_base_of_v<std::ostream, T> ? std::ios_base::out : std::ios_base::in;
// Force 'in' mode to prevent file creation
outStream->open(file, mode | std::ios_base::in);
if (!*outStream) {
ALOGE("Failed to open %s (%d): %s", file.c_str(), errno, strerror(errno));
}
}
template <typename T>
static void fileFromEnv(const char *env, T *outStream, std::string *outName = nullptr) {
auto file = std::getenv(env);
if (file == nullptr) {
ALOGE("Failed get env %s", env);
return;
}
if (outName != nullptr) {
*outName = std::string(file);
}
openNoCreate(file, outStream);
}
static ATTRIBUTE_UNUSED auto pathsFromEnv(const char *env, const std::string &prefix = "") {
std::map<std::string, std::ifstream> ret;
auto value = std::getenv(env);
if (value == nullptr) {
return ret;
}
std::istringstream paths{value};
std::string path;
while (paths >> path) {
ret[path].open(prefix + path);
}
return ret;
}
static ATTRIBUTE_UNUSED std::string trim(const std::string &str,
const std::string &whitespace = " \t") {
const auto str_begin = str.find_first_not_of(whitespace);
if (str_begin == std::string::npos) {
return "";
}
const auto str_end = str.find_last_not_of(whitespace);
const auto str_range = str_end - str_begin + 1;
return str.substr(str_begin, str_range);
}
} // namespace utils
} // namespace vibrator
} // namespace hardware
} // namespace android
} // namespace aidl
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