1 /*
2  * Copyright (C) 2015, 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 #ifndef AIDL_TYPE_CPP_H_
18 #define AIDL_TYPE_CPP_H_
19 
20 #include <memory>
21 #include <string>
22 #include <set>
23 #include <vector>
24 
25 #include <android-base/macros.h>
26 
27 #include "type_namespace.h"
28 
29 namespace android {
30 namespace aidl {
31 namespace cpp {
32 
33 class Type : public ValidatableType {
34  public:
35   Type(int kind,  // from ValidatableType
36        const std::string& package,
37        const std::string& aidl_type,
38        const std::vector<std::string>& header,
39        const std::string& cpp_type,
40        const std::string& read_method,
41        const std::string& write_method,
42        Type* array_type = nullptr,
43        Type* nullable_type = nullptr,
44        const std::string& src_file_name = "",
45        int line = -1);
46   virtual ~Type() = default;
47 
48   // overrides of ValidatableType
CanBeOutParameter()49   bool CanBeOutParameter() const override { return false; }
50   bool CanWriteToParcel() const override;
51 
ArrayType()52   const Type* ArrayType() const override { return array_type_.get(); }
NullableType()53   const Type* NullableType() const override { return nullable_type_.get(); }
CppType()54   std::string CppType() const { return cpp_type_; }
ReadFromParcelMethod()55   const std::string& ReadFromParcelMethod() const {
56     return parcel_read_method_;
57   }
WriteToParcelMethod()58   const std::string& WriteToParcelMethod() const {
59     return parcel_write_method_;
60   }
61 
GetHeaders(std::set<std::string> * headers)62   void GetHeaders(std::set<std::string>* headers) const {
63     for (const std::string& header : headers_) {
64       if (!header.empty()) {
65         headers->insert(header);
66       }
67     }
68   }
IsCppPrimitive()69   virtual bool IsCppPrimitive() const { return false; }
WriteCast(const std::string & value)70   virtual std::string WriteCast(const std::string& value) const {
71     return value;
72   }
73 
74  private:
75   // |headers| are the headers we must include to use this type
76   const std::vector<std::string> headers_;
77   // |aidl_type| is what we find in the yacc generated AST (e.g. "int").
78   const std::string aidl_type_;
79   // |cpp_type| is what we use in the generated C++ code (e.g. "int32_t").
80   const std::string cpp_type_;
81   const std::string parcel_read_method_;
82   const std::string parcel_write_method_;
83 
84   const std::unique_ptr<Type> array_type_;
85   const std::unique_ptr<Type> nullable_type_;
86 
87   DISALLOW_COPY_AND_ASSIGN(Type);
88 };  // class Type
89 
90 class TypeNamespace : public ::android::aidl::LanguageTypeNamespace<Type> {
91  public:
92   TypeNamespace() = default;
93   virtual ~TypeNamespace() = default;
94 
95   void Init() override;
96   bool AddParcelableType(const AidlParcelable& p,
97                          const std::string& filename) override;
98   bool AddBinderType(const AidlInterface& b,
99                      const std::string& filename) override;
100   bool AddListType(const std::string& type_name) override;
101   bool AddMapType(const std::string& key_type_name,
102                   const std::string& value_type_name) override;
103 
104   bool IsValidPackage(const std::string& package) const override;
105   const ValidatableType* GetArgType(const AidlArgument& a,
106                              int arg_index,
107                              const std::string& filename,
108                              const AidlInterface& interface) const override;
109 
VoidType()110   const Type* VoidType() const { return void_type_; }
IBinderType()111   const Type* IBinderType() const { return ibinder_type_; }
112 
113  private:
114   Type* void_type_ = nullptr;
115   Type* string_type_ = nullptr;
116   Type* ibinder_type_ = nullptr;
117 
118   DISALLOW_COPY_AND_ASSIGN(TypeNamespace);
119 };  // class TypeNamespace
120 
121 }  // namespace cpp
122 }  // namespace aidl
123 }  // namespace android
124 
125 #endif  // AIDL_TYPE_NAMESPACE_CPP_H_
126