src/trace_processor/blob_reader.h

/*
 * Copyright (C) 2018 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_BLOB_READER_H_
#define SRC_TRACE_PROCESSOR_BLOB_READER_H_

#include <stdint.h>

namespace perfetto {
namespace trace_processor {

// Abstraction of reading of a data source in a chunked (i.e. blob) format.
class BlobReader {
 public:
  virtual ~BlobReader();

  // Reads |len| bytes at |offset| into |dst|.
  virtual uint32_t Read(uint64_t offset, uint32_t len, uint8_t* dst) = 0;
};

}  // namespace trace_processor
}  // namespace perfetto

#endif  // SRC_TRACE_PROCESSOR_BLOB_READER_H_