1 /*
2 * Copyright 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 "fields/custom_field.h"
18 #include "util.h"
19
20 const std::string CustomField::kFieldType = "CustomField";
21
CustomField(std::string name,std::string type_name,ParseLocation loc)22 CustomField::CustomField(std::string name, std::string type_name, ParseLocation loc)
23 : PacketField(name, loc), type_name_(type_name) {}
24
GetFieldType() const25 const std::string& CustomField::GetFieldType() const {
26 return CustomField::kFieldType;
27 }
28
GetSize() const29 Size CustomField::GetSize() const {
30 return Size();
31 }
32
GetBuilderSize() const33 Size CustomField::GetBuilderSize() const {
34 std::string ret = "(" + GetName() + "_.size() * 8) ";
35 return ret;
36 }
37
GetDataType() const38 std::string CustomField::GetDataType() const {
39 return type_name_;
40 }
41
GenExtractor(std::ostream & s,int,bool) const42 void CustomField::GenExtractor(std::ostream& s, int, bool) const {
43 s << "auto optional_it = ";
44 s << GetDataType() << "::Parse( " << GetName() << "_ptr, " << GetName() << "_it);";
45 s << "if (optional_it) {";
46 s << GetName() << "_it = *optional_it;";
47 s << "} else {";
48 s << GetName() << "_it = " << GetName() << "_it + " << GetName() << "_it.NumBytesRemaining();";
49 s << GetName() << "_ptr = nullptr;";
50 s << "}";
51 }
52
GetGetterFunctionName() const53 std::string CustomField::GetGetterFunctionName() const {
54 std::stringstream ss;
55 ss << "Get" << util::UnderscoreToCamelCase(GetName());
56 return ss.str();
57 }
58
GenGetter(std::ostream & s,Size start_offset,Size end_offset) const59 void CustomField::GenGetter(std::ostream& s, Size start_offset, Size end_offset) const {
60 s << "std::unique_ptr<" << GetDataType() << "> " << GetGetterFunctionName() << "() const {";
61 s << "ASSERT(was_validated_);";
62 s << "size_t end_index = size();";
63 s << "auto to_bound = begin();";
64
65 int num_leading_bits = GenBounds(s, start_offset, end_offset, GetSize());
66 s << "std::unique_ptr<" << GetDataType() << "> " << GetName() << "_value";
67 s << " = std::make_unique<" << GetDataType() << ">();";
68 s << GetDataType() << "* " << GetName() << "_ptr = " << GetName() << "_value.get();";
69 GenExtractor(s, num_leading_bits, false);
70 s << "if (" << GetName() << "_ptr == nullptr) {" << GetName() << "_value.reset(); }";
71 s << "return " << GetName() << "_value;";
72 s << "}\n";
73 }
74
GetBuilderParameterType() const75 std::string CustomField::GetBuilderParameterType() const {
76 return GetDataType();
77 }
78
HasParameterValidator() const79 bool CustomField::HasParameterValidator() const {
80 return false;
81 }
82
GenParameterValidator(std::ostream &) const83 void CustomField::GenParameterValidator(std::ostream&) const {
84 // Do nothing.
85 }
86
GenInserter(std::ostream & s) const87 void CustomField::GenInserter(std::ostream& s) const {
88 s << GetName() << "_.Serialize(i);";
89 }
90
GenValidator(std::ostream &) const91 void CustomField::GenValidator(std::ostream&) const {
92 // Do nothing.
93 }
94
GenStringRepresentation(std::ostream & s,std::string accessor) const95 void CustomField::GenStringRepresentation(std::ostream& s, std::string accessor) const {
96 s << accessor << "->ToString()";
97 }
98
GenBuilderParameterFromView(std::ostream & s) const99 void CustomField::GenBuilderParameterFromView(std::ostream& s) const {
100 s << "*view.Get" << util::UnderscoreToCamelCase(GetName()) << "()";
101 }
102
GetRustDataType() const103 std::string CustomField::GetRustDataType() const {
104 return type_name_;
105 }
106
GenRustGetter(std::ostream &,Size,Size) const107 void CustomField::GenRustGetter(std::ostream&, Size, Size) const {
108 }
109
GenRustWriter(std::ostream &,Size,Size) const110 void CustomField::GenRustWriter(std::ostream&, Size, Size) const {}
111