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// Copyright 2021 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.
#include "pw_rpc/nanopb/server_reader_writer.h"
#include "pw_rpc/nanopb/internal/method.h"
namespace pw::rpc::internal {
Status GenericNanopbResponder::WriteResponse(const void* response) {
if (!open()) {
return Status::FailedPrecondition();
}
std::span<std::byte> buffer = AcquirePayloadBuffer();
// Cast the method to a NanopbMethod. Access the Nanopb
// serializer/deserializer object and encode the response with it.
if (auto result = static_cast<const internal::NanopbMethod&>(method())
.serde()
.EncodeResponse(response, buffer);
result.ok()) {
return ReleasePayloadBuffer(buffer.first(result.size()));
}
ReleasePayloadBuffer();
// If the Nanopb encode failed, the channel output may not have provided a
// large enough buffer or something went wrong in Nanopb. Return INTERNAL to
// indicate that the problem is internal to the server.
return Status::Internal();
}
void GenericNanopbResponder::DecodeRequest(ConstByteSpan payload,
void* request_struct) const {
static_cast<const internal::NanopbMethod&>(method()).serde().DecodeRequest(
payload, request_struct);
}
} // namespace pw::rpc::internal