Deepanjan Roy | 01994ca | 2019-04-02 11:05:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_ |
| 18 | #define SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_ |
| 19 | |
| 20 | #include <stdint.h> |
| 21 | |
| 22 | #include "src/trace_processor/chunked_trace_reader.h" |
| 23 | #include "src/trace_processor/trace_sorter.h" |
| 24 | #include "src/trace_processor/trace_storage.h" |
| 25 | |
| 26 | namespace Json { |
| 27 | class Value; |
| 28 | } |
| 29 | |
| 30 | namespace perfetto { |
| 31 | namespace trace_processor { |
| 32 | |
| 33 | class TraceProcessorContext; |
| 34 | |
Hector Dearman | fcbc5e2 | 2019-04-08 13:12:28 +0100 | [diff] [blame] | 35 | // Visible for testing. |
| 36 | enum ReadDictRes { kFoundDict, kNeedsMoreData, kEndOfTrace, kFatalError }; |
| 37 | |
| 38 | // Visible for testing. |
| 39 | ReadDictRes ReadOneJsonDict(const char* start, |
| 40 | const char* end, |
| 41 | Json::Value* value, |
| 42 | const char** next); |
| 43 | |
Deepanjan Roy | 01994ca | 2019-04-02 11:05:34 -0700 | [diff] [blame] | 44 | // Reads a JSON trace in chunks and extracts top level json objects. |
| 45 | class JsonTraceTokenizer : public ChunkedTraceReader { |
| 46 | public: |
| 47 | explicit JsonTraceTokenizer(TraceProcessorContext*); |
| 48 | ~JsonTraceTokenizer() override; |
| 49 | |
| 50 | // ChunkedTraceReader implementation. |
Lalit Maganti | d71a945 | 2019-05-09 15:13:24 +0100 | [diff] [blame] | 51 | util::Status Parse(std::unique_ptr<uint8_t[]>, size_t) override; |
Deepanjan Roy | 01994ca | 2019-04-02 11:05:34 -0700 | [diff] [blame] | 52 | |
| 53 | private: |
| 54 | TraceProcessorContext* const context_; |
| 55 | |
| 56 | uint64_t offset_ = 0; |
| 57 | // Used to glue together JSON objects that span across two (or more) |
| 58 | // Parse boundaries. |
| 59 | std::vector<char> buffer_; |
| 60 | }; |
| 61 | |
| 62 | } // namespace trace_processor |
| 63 | } // namespace perfetto |
| 64 | |
| 65 | #endif // SRC_TRACE_PROCESSOR_JSON_TRACE_TOKENIZER_H_ |