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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 <stdio.h>
#include <fstream>
#include "pw_trace_tokenized/trace_callback.h"
namespace pw {
namespace trace {
class TraceToFile {
public:
TraceToFile(Callbacks& callbacks, const char* file_name)
: callbacks_(callbacks) {
callbacks_
.RegisterSink(TraceSinkStartBlock,
TraceSinkAddBytes,
TraceSinkEndBlock,
&out_,
&sink_handle_)
.IgnoreError(); // TODO: b/242598609 - Handle Status properly
out_.open(file_name, std::ios::out | std::ios::binary);
}
~TraceToFile() {
callbacks_.UnregisterSink(sink_handle_)
.IgnoreError(); // TODO: b/242598609 - Handle Status properly
out_.close();
}
static void TraceSinkStartBlock(void* user_data, size_t size) {
std::ofstream* out = reinterpret_cast<std::ofstream*>(user_data);
uint8_t b = static_cast<uint8_t>(size);
out->write(reinterpret_cast<const char*>(&b), sizeof(b));
}
static void TraceSinkAddBytes(void* user_data,
const void* bytes,
size_t size) {
std::ofstream* out = reinterpret_cast<std::ofstream*>(user_data);
out->write(reinterpret_cast<const char*>(bytes), size);
}
static void TraceSinkEndBlock(void* user_data) {
std::ofstream* out = reinterpret_cast<std::ofstream*>(user_data);
out->flush();
}
private:
Callbacks& callbacks_;
std::ofstream out_;
Callbacks::SinkHandle sink_handle_;
};
} // namespace trace
} // namespace pw
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