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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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