Line data    Source code

       1             : //
       2             : // Author: Vladimir Migashko <migashko@gmail.com>, (C) 2017
       3             : //
       4             : // Copyright: See COPYING file that comes with this distribution
       5             : //
       6             : 
       7             : #ifndef VSET_VSET_MEMORY_FSB_ASPECT_AD_POS2OFF_HPP
       8             : #define VSET_VSET_MEMORY_FSB_ASPECT_AD_POS2OFF_HPP
       9             : 
      10             : #include <vset/buffer/tags.hpp>
      11             : #include <vset/memory/fsb/tags.hpp>
      12             : #include <cstddef>
      13             : 
      14             : namespace vset { namespace memory{ namespace fsb{
      15             : 
      16             : struct ad_pos2off
      17             : {
      18             :   template<typename T>
      19             :   size_t operator()(T&, size_t pos) const
      20             :   {
      21             :     typedef typename T::aspect::template advice_cast<_value_type_>::type value_type;
      22             :     typedef typename T::aspect::template advice_cast<_chunk_type_>::type chunk_type;
      23             :     typedef typename T::aspect::template advice_cast<_chain_type_>::type chain_type;
      24             : 
      25             :     size_t real_offset = chain_type::head_size();
      26             :     real_offset += chunk_type::head_size() + (pos / chunk_type::max_count()) * chunk_type::head_size();
      27             :     real_offset += sizeof(value_type)*pos;
      28             :     return real_offset;
      29             :   }
      30             : };
      31             : 
      32          31 : struct ad_pos2off_stub
      33             : {
      34             :   template<typename T>
      35     2900179 :   size_t operator()(T&, size_t pos) const
      36             :   {
      37     2900179 :     return pos;
      38             :   }
      39             : };
      40             : 
      41             : }}}
      42             : 
      43             : #endif