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#ifndef RFL_CAPNPROTO_WRITER_HPP_
#define RFL_CAPNPROTO_WRITER_HPP_
#include <capnp/dynamic.h>
#include <kj/array.h>
#include <bit>
#include <cstdint>
#include <exception>
#include <map>
#include <sstream>
#include <stdexcept>
#include <string>
#include <string_view>
#include <type_traits>
#include <variant>
#include <vector>
#include "../Box.hpp"
#include "../Bytestring.hpp"
#include "../Ref.hpp"
#include "../Result.hpp"
#include "../Vectorstring.hpp"
#include "../always_false.hpp"
#include "../internal/is_literal.hpp"
#include "../internal/ptr_cast.hpp"
namespace rfl::capnproto {
class Writer {
public:
struct CapnProtoOutputArray {
capnp::DynamicList::Builder val_;
size_t ix_ = 0;
};
struct CapnProtoOutputMap {
capnp::DynamicStruct::Builder val_;
size_t ix_ = 0;
};
struct CapnProtoOutputObject {
capnp::DynamicStruct::Builder val_;
};
struct CapnProtoOutputUnion {
capnp::DynamicStruct::Builder val_;
};
struct CapnProtoOutputVar {
capnp::DynamicValue::Builder val_;
};
using OutputArrayType = CapnProtoOutputArray;
using OutputMapType = CapnProtoOutputMap;
using OutputObjectType = CapnProtoOutputObject;
using OutputUnionType = CapnProtoOutputUnion;
using OutputVarType = CapnProtoOutputVar;
Writer(capnp::DynamicStruct::Builder* _root);
~Writer();
template <class T>
OutputArrayType array_as_root(const T _size) const noexcept {
static_assert(always_false_v<T>,
"In Cap'n Proto, root values must always be structs.");
throw std::runtime_error("Unsupported.");
}
template <class T>
OutputMapType map_as_root(const T _size) const noexcept {
static_assert(always_false_v<T>,
"In Cap'n Proto, root values must always be structs.");
throw std::runtime_error("Unsupported.");
}
Writer::OutputObjectType object_as_root(const size_t _size) const noexcept;
template <class T = int>
OutputVarType null_as_root() const noexcept {
static_assert(always_false_v<T>,
"In Cap'n Proto, root values must always be structs.");
throw std::runtime_error("Unsupported.");
}
template <class T = int>
OutputUnionType union_as_root() const noexcept {
static_assert(always_false_v<T>,
"In Cap'n Proto, root values must always be structs.");
throw std::runtime_error("Unsupported.");
}
template <class T>
OutputVarType value_as_root(const T& _var) const noexcept {
static_assert(always_false_v<T>,
"In Cap'n Proto, root values must always be structs.");
throw std::runtime_error("Unsupported.");
}
OutputArrayType add_array_to_array(const size_t _size,
OutputArrayType* _parent) const noexcept;
OutputArrayType add_array_to_map(const std::string_view& _name,
const size_t _size,
OutputMapType* _parent) const noexcept;
OutputArrayType add_array_to_object(const std::string_view& _name,
const size_t _size,
OutputObjectType* _parent) const noexcept;
OutputArrayType add_array_to_union(const size_t _index, const size_t _size,
OutputUnionType* _parent) const noexcept;
OutputMapType add_map_to_array(const size_t _size,
OutputArrayType* _parent) const noexcept;
OutputMapType add_map_to_map(const std::string_view& _name,
const size_t _size,
OutputMapType* _parent) const noexcept;
OutputMapType add_map_to_object(const std::string_view& _name,
const size_t _size,
OutputObjectType* _parent) const noexcept;
OutputMapType add_map_to_union(const size_t _index, const size_t _size,
OutputUnionType* _parent) const noexcept;
OutputObjectType add_object_to_array(const size_t _size,
OutputArrayType* _parent) const noexcept;
OutputObjectType add_object_to_map(const std::string_view& _name,
const size_t _size,
OutputMapType* _parent) const noexcept;
OutputObjectType add_object_to_object(
const std::string_view& _name, const size_t _size,
OutputObjectType* _parent) const noexcept;
OutputObjectType add_object_to_union(const size_t _index, const size_t _size,
OutputUnionType* _parent) const noexcept;
OutputUnionType add_union_to_array(OutputArrayType* _parent) const noexcept;
OutputUnionType add_union_to_map(const std::string_view& _name,
OutputMapType* _parent) const noexcept;
OutputUnionType add_union_to_object(const std::string_view& _name,
OutputObjectType* _parent) const noexcept;
OutputUnionType add_union_to_union(const size_t _index,
OutputUnionType* _parent) const noexcept;
OutputVarType add_null_to_array(OutputArrayType* _parent) const noexcept;
OutputVarType add_null_to_map(const std::string_view& _name,
OutputMapType* _parent) const noexcept;
OutputVarType add_null_to_object(const std::string_view& _name,
OutputObjectType* _parent) const noexcept;
OutputVarType add_null_to_union(const size_t _index,
OutputUnionType* _parent) const noexcept;
template <class T>
OutputVarType add_value_to_array(const T& _var,
OutputArrayType* _parent) const noexcept {
if constexpr (std::is_same<std::remove_cvref_t<T>, std::string>()) {
_parent->val_.set(_parent->ix_++, _var.c_str());
} else if constexpr (std::is_same<std::remove_cvref_t<T>,
rfl::Bytestring>() ||
std::is_same<std::remove_cvref_t<T>,
rfl::Vectorstring>()) {
const auto array_ptr = kj::ArrayPtr<const kj::byte>(
internal::ptr_cast<const unsigned char*>(_var.data()), _var.size());
_parent->val_.set(_parent->ix_++, capnp::Data::Reader(array_ptr));
} else if constexpr (std::is_floating_point<std::remove_cvref_t<T>>() ||
std::is_same<std::remove_cvref_t<T>, bool>()) {
_parent->val_.set(_parent->ix_++, _var);
} else if constexpr (std::is_integral<std::remove_cvref_t<T>>()) {
_parent->val_.set(_parent->ix_++, static_cast<std::int64_t>(_var));
} else if constexpr (internal::is_literal_v<T>) {
return add_value_to_array(_var.value(), _parent);
} else {
static_assert(rfl::always_false_v<T>, "Unsupported type.");
}
return OutputVarType{};
}
template <class T>
OutputVarType add_value_to_map(const std::string_view& _name, const T& _var,
OutputMapType* _parent) const noexcept {
auto entries =
OutputArrayType{_parent->val_.get("entries").as<capnp::DynamicList>()};
auto new_entry = add_object_to_array(2, &entries);
add_value_to_object("key", std::string(_name), &new_entry);
return add_value_to_object("value", _var, &new_entry);
}
template <class T>
OutputVarType add_value_to_object(const std::string_view& _name,
const T& _var,
OutputObjectType* _parent) const noexcept {
if constexpr (std::is_same<std::remove_cvref_t<T>, std::string>()) {
_parent->val_.set(_name.data(), _var.c_str());
} else if constexpr (std::is_same<std::remove_cvref_t<T>,
rfl::Bytestring>()) {
const auto array_ptr = kj::ArrayPtr<const kj::byte>(
internal::ptr_cast<const unsigned char*>(_var.data()), _var.size());
_parent->val_.set(_name.data(), capnp::Data::Reader(array_ptr));
} else if constexpr (std::is_floating_point<std::remove_cvref_t<T>>() ||
std::is_same<std::remove_cvref_t<T>, bool>()) {
_parent->val_.set(_name.data(), _var);
} else if constexpr (std::is_integral<std::remove_cvref_t<T>>()) {
_parent->val_.set(_name.data(), static_cast<std::int64_t>(_var));
} else if constexpr (internal::is_literal_v<T>) {
return add_value_to_object(_name, _var.value(), _parent);
} else {
static_assert(rfl::always_false_v<T>, "Unsupported type.");
}
return OutputVarType{};
}
template <class T>
OutputVarType add_value_to_union(const size_t _index, const T& _var,
OutputUnionType* _parent) const noexcept {
const auto field = _parent->val_.getSchema().getFields()[_index];
if constexpr (std::is_same<std::remove_cvref_t<T>, std::string>()) {
_parent->val_.set(field, _var.c_str());
} else if constexpr (std::is_same<std::remove_cvref_t<T>,
rfl::Bytestring>()) {
const auto array_ptr = kj::ArrayPtr<const kj::byte>(
internal::ptr_cast<const unsigned char*>(_var.data()), _var.size());
_parent->val_.set(field, capnp::Data::Reader(array_ptr));
} else if constexpr (std::is_floating_point<std::remove_cvref_t<T>>() ||
std::is_same<std::remove_cvref_t<T>, bool>()) {
_parent->val_.set(field, _var);
} else if constexpr (std::is_integral<std::remove_cvref_t<T>>()) {
_parent->val_.set(field, static_cast<std::int64_t>(_var));
} else if constexpr (internal::is_literal_v<T>) {
return add_value_to_union(_index, _var.value(), _parent);
} else {
static_assert(rfl::always_false_v<T>, "Unsupported type.");
}
return OutputVarType{};
}
void end_array(OutputArrayType* _arr) const noexcept {}
void end_map(OutputMapType* _obj) const noexcept {}
void end_object(OutputObjectType* _obj) const noexcept {}
private:
capnp::DynamicStruct::Builder* root_;
};
} // namespace rfl::capnproto
#endif
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