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140 lines
4.2 KiB
140 lines
4.2 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "linkerconfig/librarylistloader.h"
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#include <android-base/result.h>
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#include <android-base/strings.h>
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#include <algorithm>
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#include <fstream>
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#include <iterator>
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#include <set>
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#include <sstream>
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#include <unordered_map>
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#include "linkerconfig/environment.h"
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#include "linkerconfig/log.h"
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using LibraryList = std::set<std::string>;
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using android::base::Result;
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namespace {
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std::unordered_map<std::string, LibraryList> library_file_cache;
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Result<LibraryList> GetLibrariesFromFile(std::string file_path) {
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auto cached_data = library_file_cache.find(file_path);
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if (cached_data != library_file_cache.end()) {
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return cached_data->second;
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}
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std::string library_name;
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LibraryList library_list;
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std::ifstream library_file(file_path.c_str(), std::ifstream::in);
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if (!library_file) {
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return ErrnoErrorf("Failed to open file {}", file_path);
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}
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while (std::getline(library_file, library_name)) {
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library_name = android::base::Trim(library_name);
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if (!library_name.empty()) {
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library_list.insert(library_name);
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}
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}
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library_file_cache.insert({file_path, library_list});
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return library_list;
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}
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} // namespace
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namespace android {
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namespace linkerconfig {
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namespace generator {
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std::string GetLibrariesString(const std::string& library_file_path) {
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auto library_list_result = GetLibrariesFromFile(library_file_path);
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if (library_list_result.ok()) {
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return android::base::Join(*library_list_result, ':');
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} else {
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// Consider unavailable library file as empty
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LOG(WARNING) << library_list_result.error();
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return "";
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}
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}
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std::string GetPublicLibrariesString(
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const std::string& library_file_path,
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const std::string& private_library_file_path) {
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auto library_list = GetLibrariesFromFile(library_file_path);
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auto private_library_list = GetLibrariesFromFile(private_library_file_path);
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if (!library_list.ok()) {
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// Consider unavailable library file as empty
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LOG(WARNING) << library_list.error();
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return "";
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}
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if (!private_library_list.ok()) {
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// No private library found. All libraries are public
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LOG(WARNING) << private_library_list.error();
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return android::base::Join(*library_list, ':');
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}
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LibraryList public_library_list;
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std::set_difference(
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library_list->begin(),
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library_list->end(),
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private_library_list->begin(),
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private_library_list->end(),
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std::inserter(public_library_list, public_library_list.begin()));
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return android::base::Join(public_library_list, ':');
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}
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std::string GetPrivateLibrariesString(
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const std::string& library_file_path,
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const std::string& private_library_file_path) {
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auto library_list = GetLibrariesFromFile(library_file_path);
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auto private_library_list = GetLibrariesFromFile(private_library_file_path);
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if (!library_list.ok()) {
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// Consider unavailable library file as empty
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LOG(WARNING) << library_list.error();
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return "";
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}
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if (!private_library_list.ok()) {
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// No private library found. All libraries are public
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LOG(WARNING) << private_library_list.error();
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return "";
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}
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LibraryList private_only_library_list;
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std::set_intersection(library_list->begin(),
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library_list->end(),
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private_library_list->begin(),
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private_library_list->end(),
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std::inserter(private_only_library_list,
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private_only_library_list.begin()));
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return android::base::Join(private_only_library_list, ':');
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}
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} // namespace generator
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} // namespace linkerconfig
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} // namespace android
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