1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include "linkerconfig/stringutil.h" 17 18 #include <set> 19 #include <sstream> 20 #include <vector> 21 22 #include <android-base/strings.h> 23 24 namespace android { 25 namespace linkerconfig { 26 namespace modules { TrimPrefix(const std::string & s,const std::string & prefix)27std::string TrimPrefix(const std::string& s, const std::string& prefix) { 28 if (android::base::StartsWith(s, prefix)) { 29 return s.substr(prefix.size()); 30 } 31 return s; 32 } 33 34 // merge a list of libs into a single value (concat with ":") MergeLibs(const std::vector<std::string> & libs)35std::string MergeLibs(const std::vector<std::string>& libs) { 36 std::set<std::string> seen; 37 std::ostringstream oss; 38 for (const auto& part : libs) { 39 std::istringstream iss(part); 40 std::string lib; 41 while (std::getline(iss, lib, ':')) { 42 if (!lib.empty() && seen.insert(lib).second) { // for a new lib 43 if (oss.tellp() > 0) { 44 oss << ':'; 45 } 46 oss << lib; 47 } 48 } 49 } 50 return oss.str(); 51 } 52 } // namespace modules 53 } // namespace linkerconfig 54 } // namespace android