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 <hidl-util/FQName.h>
18 #include <string>
19
20 #include "AidlHelper.h"
21 #include "ArrayType.h"
22 #include "EnumType.h"
23 #include "FmqType.h"
24 #include "NamedType.h"
25 #include "Type.h"
26 #include "VectorType.h"
27
28 namespace android {
29
getPlaceholderType(const std::string & type)30 static std::string getPlaceholderType(const std::string& type) {
31 return "IBinder /* FIXME: " + type + " */";
32 }
33
34 static const std::map<std::string, ReplacedTypeInfo> kReplacedTypes{
35 {"android.hidl.safe_union@1.0::Monostate",
36 ReplacedTypeInfo{
37 "boolean", std::nullopt,
__anon4050bd8c0102() 38 [](Formatter& out) { out << "// Nothing to translate for Monostate.\n"; }}},
39 };
40
getAidlReplacedType(const FQName & fqName)41 std::optional<const ReplacedTypeInfo> AidlHelper::getAidlReplacedType(const FQName& fqName) {
42 const auto& it = kReplacedTypes.find(fqName.string());
43 if (it != kReplacedTypes.end()) {
44 return it->second;
45 }
46 return std::nullopt;
47 }
48
getAidlType(const Type & type,const FQName & relativeTo,AidlBackend backend)49 std::string AidlHelper::getAidlType(const Type& type, const FQName& relativeTo,
50 AidlBackend backend) {
51 if (type.isVector()) {
52 const VectorType& vec = static_cast<const VectorType&>(type);
53 return getAidlType(*vec.getElementType(), relativeTo) + "[]";
54 } else if (type.isArray()) {
55 const ArrayType& arr = static_cast<const ArrayType&>(type);
56 auto sizes = arr.getConstantExpressions();
57 CHECK(sizes.size() > 0) << "Failed to get array dimensions for " << arr.definedName();
58 std::string typeStr = getAidlType(*arr.getElementType(), relativeTo);
59 for (const auto& size : sizes) {
60 typeStr += "[" + size->value() + "]";
61 }
62 return typeStr;
63 } else if (type.isNamedType()) {
64 const NamedType& namedType = static_cast<const NamedType&>(type);
65 if (getAidlPackage(relativeTo) == getAidlPackage(namedType.fqName())) {
66 return getAidlName(namedType.fqName(), backend);
67 } else {
68 std::optional<const ReplacedTypeInfo> type = getAidlReplacedType(namedType.fqName());
69 if (type) {
70 notes() << "Replacing type " << namedType.fqName().string() << " with "
71 << type.value().aidlReplacedType << ".\n";
72 return type.value().aidlReplacedType;
73 }
74 std::optional<std::string> name = getAidlFQName(namedType.fqName()).value();
75 if (name) {
76 return name.value();
77 } else {
78 LOG(FATAL) << "Failed to resolve Aidl FQName: " << namedType.fqName().string();
79 return "";
80 }
81 }
82 } else if (type.isMemory()) {
83 return getPlaceholderType("memory");
84 } else if (type.isFmq()) {
85 const FmqType& fmq = static_cast<const FmqType&>(type);
86 return getPlaceholderType(fmq.templatedTypeName() + "<" +
87 getAidlType(*fmq.getElementType(), relativeTo) + ">");
88 } else if (type.isPointer()) {
89 return getPlaceholderType("pointer");
90 } else if (type.isEnum()) {
91 // enum type goes to the primitive java type in HIDL, but AIDL should use
92 // the enum type name itself
93 return type.definedName();
94 } else if (type.isBitField()) {
95 const BitFieldType& bitfield = static_cast<const BitFieldType&>(type);
96 return getAidlType(*bitfield.getElementType(), relativeTo);
97 } else if (type.getJavaType() == "short") {
98 notes() << relativeTo.name()
99 << ": Consider replacing char with int if signed integer is desired\n";
100 return "char";
101 } else {
102 return type.getJavaType();
103 }
104 }
105
106 } // namespace android
107