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110 lines
3.4 KiB
110 lines
3.4 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fields/struct_field.h"
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#include "util.h"
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const std::string StructField::kFieldType = "StructField";
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StructField::StructField(std::string name, std::string type_name, Size size, ParseLocation loc)
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: PacketField(name, loc), type_name_(type_name), size_(size) {}
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const std::string& StructField::GetFieldType() const {
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return StructField::kFieldType;
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}
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Size StructField::GetSize() const {
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return size_;
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}
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Size StructField::GetBuilderSize() const {
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std::string ret = "(" + GetName() + "_.size() * 8)";
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return ret;
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}
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std::string StructField::GetDataType() const {
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return type_name_;
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}
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void StructField::GenExtractor(std::ostream& s, int, bool) const {
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s << GetName() << "_it = ";
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s << GetDataType() << "::Parse(" << GetName() << "_ptr, " << GetName() << "_it);";
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}
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std::string StructField::GetGetterFunctionName() const {
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std::stringstream ss;
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ss << "Get" << util::UnderscoreToCamelCase(GetName());
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return ss.str();
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}
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void StructField::GenGetter(std::ostream& s, Size start_offset, Size end_offset) const {
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s << GetDataType() << " " << GetGetterFunctionName() << "() const {";
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s << "ASSERT(was_validated_);";
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s << "size_t end_index = size();";
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s << "auto to_bound = begin();";
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int num_leading_bits = GenBounds(s, start_offset, end_offset, GetSize());
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s << GetDataType() << " " << GetName() << "_value{};";
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s << GetDataType() << "* " << GetName() << "_ptr = &" << GetName() << "_value;";
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GenExtractor(s, num_leading_bits, false);
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s << "return " << GetName() << "_value;";
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s << "}\n";
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}
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std::string StructField::GetBuilderParameterType() const {
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return GetDataType();
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}
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bool StructField::HasParameterValidator() const {
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return false;
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}
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void StructField::GenParameterValidator(std::ostream&) const {
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// Validated at compile time.
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}
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void StructField::GenInserter(std::ostream& s) const {
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s << GetName() << "_.Serialize(i);";
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}
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void StructField::GenValidator(std::ostream&) const {
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// Do nothing
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}
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void StructField::GenStringRepresentation(std::ostream& s, std::string accessor) const {
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s << accessor << ".ToString()";
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}
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std::string StructField::GetRustDataType() const {
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return GetDataType();
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}
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void StructField::GenBoundsCheck(std::ostream&, Size, Size, std::string) const {
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// implicitly checked by the struct parser
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}
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void StructField::GenRustGetter(std::ostream& s, Size start_offset, Size) const {
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s << "let " << GetName() << " = ";
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s << GetRustDataType() << "::parse(&bytes[" << start_offset.bytes() << "..";
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s << start_offset.bytes() + GetSize().bytes() << "]).unwrap();";
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}
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void StructField::GenRustWriter(std::ostream& s, Size start_offset, Size) const {
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s << "let " << GetName() << " = &mut buffer[" << start_offset.bytes();
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s << ".." << start_offset.bytes() + GetSize().bytes() << "];";
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s << "self." << GetName() << ".write_to(" << GetName() << ");";
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}
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