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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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
*
* http://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.
*/
#ifndef SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_
#define SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_
#include <stdint.h>
#include "src/trace_processor/chunked_trace_reader.h"
#include "src/trace_processor/trace_sorter.h"
#include "src/trace_processor/trace_storage.h"
namespace Json {
class Value;
}
namespace perfetto {
namespace trace_processor {
class TraceProcessorContext;
// Visible for testing.
enum ReadDictRes { kFoundDict, kNeedsMoreData, kEndOfTrace, kFatalError };
// Visible for testing.
ReadDictRes ReadOneJsonDict(const char* start,
const char* end,
Json::Value* value,
const char** next);
// Reads a JSON trace in chunks and extracts top level json objects.
class JsonTraceTokenizer : public ChunkedTraceReader {
public:
explicit JsonTraceTokenizer(TraceProcessorContext*);
~JsonTraceTokenizer() override;
// ChunkedTraceReader implementation.
bool Parse(std::unique_ptr<uint8_t[]>, size_t) override;
private:
TraceProcessorContext* const context_;
uint64_t offset_ = 0;
// Used to glue together JSON objects that span across two (or more)
// Parse boundaries.
std::vector<char> buffer_;
};
} // namespace trace_processor
} // namespace perfetto
#endif // SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_
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