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// Copyright 2023 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_system/transfer_handlers.h"
namespace pw::system {
TracePersistentBufferTransfer::TracePersistentBufferTransfer(
uint32_t id, TracePersistentBuffer& persistent_buffer)
: transfer::ReadOnlyHandler(id),
persistent_buffer_(persistent_buffer),
reader_({}) {
set_reader(reader_);
}
Status TracePersistentBufferTransfer::PrepareRead() {
if (!persistent_buffer_.has_value()) {
return Status::Unavailable();
}
// As seeking is not yet supported, reinitialize the reader from the start
// of the snapshot buffer.
new (&reader_) stream::MemoryReader(
pw::ConstByteSpan{persistent_buffer_.data(), persistent_buffer_.size()});
return OkStatus();
}
} // namespace pw::system
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