mirror of
https://github.com/robbert-vdh/yabridge.git
synced 2026-05-07 03:50:11 +02:00
Robbert van der Helm
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
// yabridge: a Wine plugin bridge
|
|
// Copyright (C) 2020-2024 Robbert van der Helm
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
#pragma once
|
|
|
|
#include <bitsery/ext/std_optional.h>
|
|
|
|
namespace bitsery {
|
|
namespace ext {
|
|
|
|
/**
|
|
* A temporary replacement for `bitsery::ext::InPlaceOptional` to avoid
|
|
* reinitializing the object we're deserializing into if it already holds a
|
|
* value. This follows the same idea as our `InPLaceVariant`.
|
|
*
|
|
* This is copied almost verbatim from `bitsery::ext::InPlaceOptional` (we can't
|
|
* access the private member, so we couldn't override just the deserialization
|
|
* method).
|
|
*/
|
|
class InPlaceOptional {
|
|
public:
|
|
/**
|
|
* Works with std::optional types
|
|
* @param alignBeforeData only makes sense when bit-packing enabled, by
|
|
* default aligns after writing/reading bool state of optional
|
|
*/
|
|
explicit InPlaceOptional(bool alignBeforeData = true)
|
|
: _alignBeforeData{alignBeforeData} {}
|
|
|
|
template <typename Ser, typename T, typename Fnc>
|
|
void serialize(Ser& ser, const std::optional<T>& obj, Fnc&& fnc) const {
|
|
ser.boolValue(static_cast<bool>(obj));
|
|
if (_alignBeforeData)
|
|
ser.adapter().align();
|
|
if (obj)
|
|
fnc(ser, const_cast<T&>(*obj));
|
|
}
|
|
|
|
template <typename Des, typename T, typename Fnc>
|
|
void deserialize(Des& des, std::optional<T>& obj, Fnc&& fnc) const {
|
|
bool exists{};
|
|
des.boolValue(exists);
|
|
if (_alignBeforeData)
|
|
des.adapter().align();
|
|
if (exists) {
|
|
// Reinitializing nontrivial types may be expensive
|
|
// especially when they reference heap data, so if `obj`
|
|
// already holds a value then we'll deserialize into the
|
|
// existing object
|
|
if constexpr (!std::is_trivial_v<T>) {
|
|
if (obj) {
|
|
fnc(des, *obj);
|
|
return;
|
|
}
|
|
}
|
|
|
|
obj = ::bitsery::Access::create<T>();
|
|
fnc(des, *obj);
|
|
} else {
|
|
obj = std::nullopt;
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool _alignBeforeData;
|
|
};
|
|
} // namespace ext
|
|
|
|
namespace traits {
|
|
template <typename T>
|
|
struct ExtensionTraits<ext::InPlaceOptional, std::optional<T>> {
|
|
using TValue = T;
|
|
static constexpr bool SupportValueOverload = true;
|
|
static constexpr bool SupportObjectOverload = true;
|
|
static constexpr bool SupportLambdaOverload = true;
|
|
};
|
|
} // namespace traits
|
|
} // namespace bitsery
|