1  ///////////////////////////////////////////////////////////////////////////////
       2  //
       3  /// \file       stream_flags_common.h
       4  /// \brief      Common stuff for Stream flags coders
       5  //
       6  //  Author:     Lasse Collin
       7  //
       8  //  This file has been put into the public domain.
       9  //  You can do whatever you want with this file.
      10  //
      11  ///////////////////////////////////////////////////////////////////////////////
      12  
      13  #ifndef LZMA_STREAM_FLAGS_COMMON_H
      14  #define LZMA_STREAM_FLAGS_COMMON_H
      15  
      16  #include "common.h"
      17  
      18  /// Size of the Stream Flags field
      19  #define LZMA_STREAM_FLAGS_SIZE 2
      20  
      21  lzma_attr_visibility_hidden
      22  extern const uint8_t lzma_header_magic[6];
      23  
      24  lzma_attr_visibility_hidden
      25  extern const uint8_t lzma_footer_magic[2];
      26  
      27  
      28  static inline bool
      29  is_backward_size_valid(const lzma_stream_flags *options)
      30  {
      31  	return options->backward_size >= LZMA_BACKWARD_SIZE_MIN
      32  			&& options->backward_size <= LZMA_BACKWARD_SIZE_MAX
      33  			&& (options->backward_size & 3) == 0;
      34  }
      35  
      36  #endif