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
17 #include "include/idmap2/PolicyUtils.h"
18
19 #include <sstream>
20 #include <string>
21 #include <vector>
22
23 #include "android-base/strings.h"
24 #include "idmap2/Policies.h"
25
26 using android::idmap2::policy::kPolicyStringToFlag;
27
28 namespace android::idmap2::utils {
29
PoliciesToBitmaskResult(const std::vector<std::string> & policies)30 Result<PolicyBitmask> PoliciesToBitmaskResult(const std::vector<std::string>& policies) {
31 std::vector<std::string> unknown_policies;
32 PolicyBitmask bitmask = 0;
33 for (const std::string& policy : policies) {
34 const auto result = std::find_if(kPolicyStringToFlag.begin(), kPolicyStringToFlag.end(),
35 [policy](const auto& it) { return policy == it.first; });
36 if (result != kPolicyStringToFlag.end()) {
37 bitmask |= result->second;
38 } else {
39 unknown_policies.emplace_back(policy.empty() ? "empty" : policy);
40 }
41 }
42
43 if (unknown_policies.empty()) {
44 return Result<PolicyBitmask>(bitmask);
45 }
46
47 auto prefix = unknown_policies.size() == 1 ? "policy" : "policies";
48 return Error("unknown %s: \"%s\"", prefix, android::base::Join(unknown_policies, ",").c_str());
49 }
50
BitmaskToPolicies(const PolicyBitmask & bitmask)51 std::vector<std::string> BitmaskToPolicies(const PolicyBitmask& bitmask) {
52 std::vector<std::string> policies;
53
54 for (const auto& policy : kPolicyStringToFlag) {
55 if ((bitmask & policy.second) != 0) {
56 policies.emplace_back(policy.first);
57 }
58 }
59
60 return policies;
61 }
62
63 } // namespace android::idmap2::utils
64