1 /*
2 * Copyright (C) 2019 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
17 #include "linkerconfig/variables.h"
18
19 #include <android-base/properties.h>
20
21 namespace android {
22 namespace linkerconfig {
23 namespace modules {
24
25 std::map<std::string, std::string> Variables::variables_;
26
GetValue(const std::string & variable)27 std::optional<std::string> Variables::GetValue(const std::string& variable) {
28 // If variable is in predefined key-value pair, use this value
29 if (variables_.find(variable) != variables_.end() &&
30 !variables_[variable].empty()) {
31 return {variables_[variable]};
32 }
33
34 // If variable is defined as property, use this value
35 std::string prop_value = android::base::GetProperty(variable, "");
36 if (!prop_value.empty()) {
37 return {prop_value};
38 }
39
40 // If cannot find variable, return default value
41 return std::nullopt;
42 }
43
AddValue(const std::string & key,const std::string & value)44 void Variables::AddValue(const std::string& key, const std::string& value) {
45 variables_[key] = value;
46 }
47 } // namespace modules
48 } // namespace linkerconfig
49 } // namespace android