1 /*
2 * Copyright (C) 2021 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 "utils.h"
17
18 #include <sstream>
19
20 #include "parse_string.h"
21
22 namespace android::vintf::details {
23
canConvertToFqInstance(const std::string & package,const Version & version,const std::string & interface,const std::string & instance,HalFormat format,std::string * appendedError)24 bool canConvertToFqInstance(const std::string& package, const Version& version,
25 const std::string& interface, const std::string& instance,
26 HalFormat format, std::string* appendedError) {
27 if (FqInstance::from(package, version.majorVer, version.minorVer, interface, instance)
28 .has_value()) {
29 return true;
30 }
31 if (appendedError == nullptr) {
32 return false;
33 }
34
35 // Attempt to construct a good error message.
36 std::stringstream ss;
37 ss << "Invalid instance: '";
38 if (format == HalFormat::AIDL) {
39 ss << toAidlFqnameString(package, interface, instance) << " (@" << version.minorVer << ")";
40 } else {
41 ss << toFQNameString(package, version, interface, instance);
42 }
43 ss << "'. ";
44
45 // Attempt to guess the source of error.
46 bool foundError = false;
47 if (!FqInstance::from(package).has_value()) {
48 ss << "Package '" << package
49 << "' should have the format [a-zA-Z_][a-zA-Z0-9_]*(\\.[a-zA-Z_][a-zA-Z0-9_]*)*";
50 foundError = true;
51 }
52
53 std::optional<FqInstance> convertedInterface = FqInstance::from(interface);
54 if (!convertedInterface.has_value() || !convertedInterface->hasInterface()) {
55 ss << "Interface '" << interface << "' should have the format I[a-zA-Z0-9_]*";
56 foundError = true;
57 }
58
59 if (!foundError) {
60 ss << "Unknown error.";
61 }
62 ss << "\n";
63
64 *appendedError += ss.str();
65 return false;
66 }
67
68 } // namespace android::vintf::details
69