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// Copyright 2020 The Pigweed Authors
//
// 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
//
// https://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.
#pragma once
#include "pw_bytes/span.h"
#include "pw_rpc/internal/method_union.h"
#include "pw_rpc/nanopb/internal/common.h"
#include "pw_rpc/nanopb/internal/method.h"
#include "pw_rpc/raw/internal/method_union.h"
namespace pw::rpc::internal {
// Method union which holds either a nanopb or a raw method.
class NanopbMethodUnion : public MethodUnion {
public:
constexpr NanopbMethodUnion(RawMethod&& method)
: impl_({.raw = std::move(method)}) {}
constexpr NanopbMethodUnion(NanopbMethod&& method)
: impl_({.nanopb = std::move(method)}) {}
constexpr const Method& method() const { return impl_.method; }
constexpr const RawMethod& raw_method() const { return impl_.raw; }
constexpr const NanopbMethod& nanopb_method() const { return impl_.nanopb; }
private:
union {
Method method;
RawMethod raw;
NanopbMethod nanopb;
} impl_;
};
// Returns either a raw or nanopb method object, depending on the implemented
// function's signature.
template <auto kMethod, MethodType kType, typename Request, typename Response>
constexpr auto GetNanopbOrRawMethodFor(
uint32_t id, [[maybe_unused]] const NanopbMethodSerde& serde) {
if constexpr (RawMethod::matches<kMethod>()) {
return GetMethodFor<kMethod, RawMethod, kType>(id);
} else if constexpr (NanopbMethod::matches<kMethod, Request, Response>()) {
return GetMethodFor<kMethod, NanopbMethod, kType>(id, serde);
} else {
return InvalidMethod<kMethod, kType, RawMethod>(id);
}
}
} // namespace pw::rpc::internal
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