1 /*
2  * Copyright (C) 2018 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_IMPORTERS_COMMON_CHUNKED_TRACE_READER_H_
18 #define SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_CHUNKED_TRACE_READER_H_
19 
20 #include <stddef.h>
21 #include <stdint.h>
22 
23 #include <memory>
24 
25 #include "perfetto/trace_processor/basic_types.h"
26 #include "perfetto/trace_processor/status.h"
27 
28 namespace perfetto {
29 namespace trace_processor {
30 
31 // Base interface for first stage of parsing pipeline
32 // (JsonTraceParser, ProtoTraceReader).
33 class ChunkedTraceReader {
34  public:
35   virtual ~ChunkedTraceReader();
36 
37   // Pushes more data into the trace parser. There is no requirement for the
38   // caller to match line/protos boundaries. The parser class has to deal with
39   // intermediate buffering lines/protos that span across different chunks.
40   // The buffer size is guaranteed to be > 0.
41   virtual util::Status Parse(std::unique_ptr<uint8_t[]>, size_t) = 0;
42 
43   // Called after the last Parse() call.
44   virtual void NotifyEndOfFile() = 0;
45 };
46 
47 }  // namespace trace_processor
48 }  // namespace perfetto
49 
50 #endif  // SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_CHUNKED_TRACE_READER_H_
51