blob: 33f552efab53f42e50c8a33c61ee5164845c45d9 [file] [log] [blame]
/*
* 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.
*/
#include "linkerconfig/librarylistloader.h"
#include <android-base/result.h>
#include <android-base/strings.h>
#include <algorithm>
#include <fstream>
#include <iterator>
#include <set>
#include <sstream>
#include <unordered_map>
#include "linkerconfig/log.h"
using LibraryList = std::set<std::string>;
using android::base::ErrnoErrorf;
using android::base::Result;
namespace {
std::unordered_map<std::string, LibraryList> library_file_cache;
Result<LibraryList> GetLibrariesFromFile(std::string file_path) {
auto cached_data = library_file_cache.find(file_path);
if (cached_data != library_file_cache.end()) {
return cached_data->second;
}
std::string library_name;
LibraryList library_list;
std::ifstream library_file(file_path.c_str(), std::ifstream::in);
if (!library_file) {
return ErrnoErrorf("Failed to open file {}", file_path);
}
while (std::getline(library_file, library_name)) {
library_name = android::base::Trim(library_name);
if (!library_name.empty()) {
library_list.insert(library_name);
}
}
library_file_cache.insert({file_path, library_list});
return library_list;
}
} // namespace
namespace android {
namespace linkerconfig {
namespace generator {
std::string GetLibrariesString(std::string library_file_path) {
auto library_list_result = GetLibrariesFromFile(library_file_path);
if (library_list_result) {
return android::base::Join(*library_list_result, ':');
} else {
// Consider unavailable library file as empty
LOG(WARNING) << library_list_result.error();
return "";
}
}
std::string GetPublicLibrariesString(std::string library_file_path,
std::string private_library_file_path) {
auto library_list = GetLibrariesFromFile(library_file_path);
auto private_library_list = GetLibrariesFromFile(private_library_file_path);
if (!library_list) {
// Consider unavailable library file as empty
LOG(WARNING) << library_list.error();
return "";
}
if (!private_library_list) {
// No private library found. All libraries are public
LOG(WARNING) << private_library_list.error();
return android::base::Join(*library_list, ':');
}
LibraryList public_library_list;
std::set_difference(
library_list->begin(),
library_list->end(),
private_library_list->begin(),
private_library_list->end(),
std::inserter(public_library_list, public_library_list.begin()));
return android::base::Join(public_library_list, ':');
}
std::string GetPrivateLibrariesString(std::string library_file_path,
std::string private_library_file_path) {
auto library_list = GetLibrariesFromFile(library_file_path);
auto private_library_list = GetLibrariesFromFile(private_library_file_path);
if (!library_list) {
// Consider unavailable library file as empty
LOG(WARNING) << library_list.error();
return "";
}
if (!private_library_list) {
// No private library found. All libraries are public
LOG(WARNING) << private_library_list.error();
return "";
}
LibraryList private_only_library_list;
std::set_intersection(library_list->begin(),
library_list->end(),
private_library_list->begin(),
private_library_list->end(),
std::inserter(private_only_library_list,
private_only_library_list.begin()));
return android::base::Join(private_only_library_list, ':');
}
} // namespace generator
} // namespace linkerconfig
} // namespace android