| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #ifndef ANDROID_VINTF_UTILS_H |
| #define ANDROID_VINTF_UTILS_H |
| |
| #include <memory> |
| #include <mutex> |
| |
| #include <utils/Errors.h> |
| #include <vintf/FileSystem.h> |
| #include <vintf/PropertyFetcher.h> |
| #include <vintf/RuntimeInfo.h> |
| #include <vintf/parse_xml.h> |
| |
| namespace android { |
| namespace vintf { |
| namespace details { |
| |
| template <typename T> |
| status_t fetchAllInformation(const FileSystem* fileSystem, const std::string& path, T* outObject, |
| std::string* error) { |
| if (outObject->fileName().empty()) { |
| outObject->setFileName(path); |
| } else { |
| outObject->setFileName(outObject->fileName() + ":" + path); |
| } |
| |
| std::string info; |
| status_t result = fileSystem->fetch(path, &info, error); |
| |
| if (result != OK) { |
| return result; |
| } |
| |
| bool success = fromXml(outObject, info, error); |
| if (!success) { |
| if (error) { |
| *error = "Illformed file: " + path + ": " + *error; |
| } |
| return BAD_VALUE; |
| } |
| return OK; |
| } |
| |
| class PropertyFetcherImpl : public PropertyFetcher { |
| public: |
| virtual std::string getProperty(const std::string& key, |
| const std::string& defaultValue = "") const; |
| virtual uint64_t getUintProperty(const std::string& key, uint64_t defaultValue, |
| uint64_t max = UINT64_MAX) const; |
| virtual bool getBoolProperty(const std::string& key, bool defaultValue) const; |
| }; |
| |
| class PropertyFetcherNoOp : public PropertyFetcher { |
| public: |
| virtual std::string getProperty(const std::string& key, |
| const std::string& defaultValue = "") const override; |
| virtual uint64_t getUintProperty(const std::string& key, uint64_t defaultValue, |
| uint64_t max = UINT64_MAX) const override; |
| virtual bool getBoolProperty(const std::string& key, bool defaultValue) const override; |
| }; |
| |
| // Merge src into dst. |
| // postcondition (if successful): *src == empty. |
| template <typename T> |
| static bool mergeField(T* dst, T* src, const T& empty = T{}) { |
| if (*dst == *src) { |
| *src = empty; |
| return true; // no conflict |
| } |
| if (*src == empty) { |
| return true; |
| } |
| if (*dst == empty) { |
| *dst = std::move(*src); |
| *src = empty; |
| return true; |
| } |
| return false; |
| } |
| |
| // Check legacy instances (i.e. <version> + <interface> + <instance>) can be |
| // converted into FqInstance because forEachInstance relies on FqInstance. |
| // If error and appendedError is not null, error message is appended to appendedError. |
| // Return the corresponding value in <fqname> (i.e. @ver::Interface/instance for |
| // HIDL, Interface/instance for AIDL, @ver[::Interface]/instance for native) |
| [[nodiscard]] std::optional<FqInstance> convertLegacyInstanceIntoFqInstance( |
| const std::string& package, const Version& version, const std::string& interface, |
| const std::string& instance, HalFormat format, std::string* appendedError); |
| |
| bool isCoreHal(const std::string& halName); |
| |
| } // namespace details |
| } // namespace vintf |
| } // namespace android |
| |
| |
| |
| #endif |