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_fixed_size.h"
18
19 #include "util.h"
20
21 const std::string CustomFieldFixedSize::kFieldType = "CustomField";
22
CustomFieldFixedSize(std::string name,std::string type_name,int size,ParseLocation loc)23 CustomFieldFixedSize::CustomFieldFixedSize(std::string name, std::string type_name, int size, ParseLocation loc)
24 : ScalarField(name, size, loc), type_name_(type_name) {}
25
GetFieldType() const26 const std::string& CustomFieldFixedSize::GetFieldType() const {
27 return CustomFieldFixedSize::kFieldType;
28 }
29
GetDataType() const30 std::string CustomFieldFixedSize::GetDataType() const {
31 return type_name_;
32 }
33
GenBounds(std::ostream & s,Size start_offset,Size end_offset,Size size) const34 int CustomFieldFixedSize::GenBounds(std::ostream& s, Size start_offset, Size end_offset, Size size) const {
35 if (!start_offset.empty()) {
36 // Default to start if available.
37 s << "auto " << GetName() << "_it = to_bound + (" << start_offset << ") / 8;";
38 } else if (!end_offset.empty()) {
39 Size byte_offset = size + end_offset;
40 s << "auto " << GetName() << "_it = to_bound (+ to_bound.NumBytesRemaining() - (" << byte_offset << ") / 8);";
41 } else {
42 ERROR(this) << "Ambiguous offset for field.";
43 }
44 return 0; // num_leading_bits
45 }
46
GenExtractor(std::ostream & s,int,bool) const47 void CustomFieldFixedSize::GenExtractor(std::ostream& s, int, bool) const {
48 s << "*" << GetName() << "_ptr = " << GetName() << "_it.extract<" << GetDataType() << ">();";
49 }
50
HasParameterValidator() const51 bool CustomFieldFixedSize::HasParameterValidator() const {
52 return false;
53 }
54
GenParameterValidator(std::ostream &) const55 void CustomFieldFixedSize::GenParameterValidator(std::ostream&) const {
56 // Do nothing.
57 }
58
GenInserter(std::ostream & s) const59 void CustomFieldFixedSize::GenInserter(std::ostream& s) const {
60 s << "insert(" << GetName() << "_, i);";
61 }
62
GenValidator(std::ostream &) const63 void CustomFieldFixedSize::GenValidator(std::ostream&) const {
64 // Do nothing.
65 }
66
GenStringRepresentation(std::ostream & s,std::string accessor) const67 void CustomFieldFixedSize::GenStringRepresentation(std::ostream& s, std::string accessor) const {
68 // We assume that custom fields will have a ToString() method
69 s << accessor << ".ToString()";
70 }
71