none_dec.h

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/* Copyright (c) 2019, 2024, Oracle and/or its affiliates.
 
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   it under the terms of the GNU General Public License, version 2.0,
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#ifndef MYSQL_BINLOG_EVENT_COMPRESSION_NONE_DEC_H
#define MYSQL_BINLOG_EVENT_COMPRESSION_NONE_DEC_H
 
#include "mysql/binlog/event/compression/decompressor.h"
#include "mysql/utils/nodiscard.h"
 
namespace mysql::binlog::event::compression {
 
/// Decompressor subclass that only copies input to output without
/// decompressing it.
class None_dec : public Decompressor {
 public:
  using typename Decompressor::Char_t;
  using typename Decompressor::Size_t;
  static constexpr type type_code = NONE;
 
  None_dec() = default;
  ~None_dec() override = default;
 
  None_dec(const None_dec &) = delete;
  None_dec(const None_dec &&) = delete;
  None_dec &operator=(const None_dec &) = delete;
  None_dec &operator=(const None_dec &&) = delete;
 
 private:
  /// @return NONE
  type do_get_type_code() const override;
 
  /// @copydoc Decompressor::do_reset
  void do_reset() override;
 
  /// @copydoc Decompressor::do_feed
  void do_feed(const Char_t *input_data, Size_t input_size) override;
 
  /// @copydoc Decompressor::do_decompress
  [[NODISCARD]] std::pair<Decompress_status, Size_t> do_decompress(
      Char_t *out, Size_t output_size) override;
 
  /// Input data
  const Char_t *m_input_data;
  Size_t m_input_size;
  Size_t m_input_position;
};
 
}  // namespace mysql::binlog::event::compression
 
#endif  // MYSQL_BINLOG_EVENT_COMPRESSION_NONE_DEC_H