text: ///////////////////////////////////////////////////////////////////////////////
  //
  /// \file       stream_flags_common.h
  /// \brief      Common stuff for Stream flags coders
  //
  //  Author:     Lasse Collin
  //
  //  This file has been put into the public domain.
  //  You can do whatever you want with this file.
  //
  ///////////////////////////////////////////////////////////////////////////////
  
  #ifndef LZMA_STREAM_FLAGS_COMMON_H
  #define LZMA_STREAM_FLAGS_COMMON_H
  
  #include "common.h"
  
  /// Size of the Stream Flags field
  #define LZMA_STREAM_FLAGS_SIZE 2
  
  extern const uint8_t lzma_header_magic[6];
  extern const uint8_t lzma_footer_magic[2];
  
  
  static inline bool
  is_backward_size_valid(const lzma_stream_flags *options)
  {
  	return options->backward_size >= LZMA_BACKWARD_SIZE_MIN
  			&& options->backward_size <= LZMA_BACKWARD_SIZE_MAX
  			&& (options->backward_size & 3) == 0;
  }
  
  #endif
  