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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "enum_gen.h"
#include <iostream>
#include "util.h"
EnumGen::EnumGen(EnumDef e) : e_(std::move(e)) {}
void EnumGen::GenDefinition(std::ostream& stream) {
stream << "enum class ";
stream << e_.name_;
stream << " : " << util::GetTypeForSize(e_.size_);
stream << " {";
for (const auto& pair : e_.constants_) {
stream << pair.second << " = 0x" << std::hex << pair.first << std::dec << ",";
}
stream << "};\n";
}
void EnumGen::GenDefinitionPybind11(std::ostream& stream) {
stream << "py::enum_<" << e_.name_ << ">(m, \"" << e_.name_ << "\")";
for (const auto& pair : e_.constants_) {
stream << ".value(\"" << pair.second << "\", " << e_.name_ << "::" << pair.second << ")";
}
stream << ";\n";
}
void EnumGen::GenLogging(std::ostream& stream) {
// Print out the switch statement that converts all the constants to strings.
stream << "inline std::string " << e_.name_ << "Text(const " << e_.name_ << "& param) {";
stream << "switch (param) {";
for (const auto& pair : e_.constants_) {
stream << "case " << e_.name_ << "::" << pair.second << ":";
stream << " return \"" << pair.second << "\";";
}
stream << "default:";
stream << " return std::string(\"Unknown " << e_.name_ << ": \") + std::to_string(static_cast<int>(param));";
stream << "}";
stream << "}\n\n";
// Print out the stream operator so that the constant can be written to streams.
stream << "inline std::ostream& operator<<(std::ostream& os, const " << e_.name_ << "& param) {";
stream << " return os << " << e_.name_ << "Text(param);";
stream << "}\n";
}
void EnumGen::GenRustDef(std::ostream& stream) {
stream << "#[derive(FromPrimitive, ToPrimitive, Debug, Hash, Eq, PartialEq, Clone, Copy)]\n";
stream << "#[repr(u64)]\n";
stream << "pub enum " << e_.name_ << " {";
for (const auto& pair : e_.constants_) {
stream << util::ConstantCaseToCamelCase(pair.second) << " = 0x" << std::hex << pair.first << std::dec << ",";
}
stream << "}";
stream << "impl fmt::Display for " << e_.name_ << " {";
stream << "fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {";
stream << "match self {";
for (const auto& pair : e_.constants_) {
stream << e_.name_ << "::" << util::ConstantCaseToCamelCase(pair.second) << " => "
<< "write!(f, \"{:#0" << (util::RoundSizeUp(e_.size_) / 4) + 2 << "X} (" << pair.second << ")\", "
<< "self.to_" << util::GetRustTypeForSize(e_.size_) << "().unwrap()),";
}
stream << "}}}\n";
if (e_.try_from_enum_ != nullptr) {
std::vector<std::string> other_items;
for (const auto& pair : e_.try_from_enum_->constants_) {
other_items.push_back(pair.second);
}
stream << "impl TryFrom<" << e_.try_from_enum_->name_ << "> for " << e_.name_ << " {";
stream << "type Error = &'static str;";
stream << "fn try_from(value: " << e_.try_from_enum_->name_ << ") -> std::result::Result<Self, Self::Error> {";
stream << "match value {";
for (const auto& pair : e_.constants_) {
if (std::find(other_items.begin(), other_items.end(), pair.second) == other_items.end()) {
continue;
}
auto constant_name = util::ConstantCaseToCamelCase(pair.second);
stream << e_.try_from_enum_->name_ << "::" << constant_name << " => Ok(" << e_.name_ << "::" << constant_name
<< "),";
}
stream << "_ => Err(\"No mapping for provided key\"),";
stream << "}}}";
}
}
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