Line data    Source code

       1             : // Copyright (c) 2019  Made to Order Software Corp.  All Rights Reserved
       2             : //
       3             : // https://snapwebsites.org/project/snapdatabase
       4             : // contact@m2osw.com
       5             : //
       6             : // This program is free software; you can redistribute it and/or modify
       7             : // it under the terms of the GNU General Public License as published by
       8             : // the Free Software Foundation; either version 2 of the License, or
       9             : // (at your option) any later version.
      10             : //
      11             : // This program is distributed in the hope that it will be useful,
      12             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             : // GNU General Public License for more details.
      15             : //
      16             : // You should have received a copy of the GNU General Public License along
      17             : // with this program; if not, write to the Free Software Foundation, Inc.,
      18             : // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      19             : 
      20             : 
      21             : /** \file
      22             :  * \brief Database file implementation.
      23             :  *
      24             :  * Each table uses one or more files. Each file is handled by a dbfile
      25             :  * object and a corresponding set of blocks.
      26             :  */
      27             : 
      28             : // self
      29             : //
      30             : #include    "snapdatabase/block/block_entry_index.h"
      31             : 
      32             : #include    "snapdatabase/block/block_header.h"
      33             : 
      34             : 
      35             : // last include
      36             : //
      37             : #include    <snapdev/poison.h>
      38             : 
      39             : 
      40             : 
      41             : namespace snapdatabase
      42             : {
      43             : 
      44             : 
      45             : 
      46             : namespace
      47             : {
      48             : 
      49             : 
      50             : 
      51             : // 'EIDX'
      52             : constexpr struct_description_t g_description[] =
      53             : {
      54             :     define_description(
      55             :           FieldName("header")
      56             :         , FieldType(struct_type_t::STRUCT_TYPE_STRUCTURE)
      57             :         , FieldSubDescription(detail::g_block_header)
      58             :     ),
      59             :     define_description(
      60             :           FieldName("count")
      61             :         , FieldType(struct_type_t::STRUCT_TYPE_UINT32)
      62             :     ),
      63             :     define_description(
      64             :           FieldName("size")
      65             :         , FieldType(struct_type_t::STRUCT_TYPE_UINT32)
      66             :     ),
      67             :     define_description(
      68             :           FieldName("next")
      69             :         , FieldType(struct_type_t::STRUCT_TYPE_REFERENCE)
      70             :     ),
      71             :     define_description(
      72             :           FieldName("previous")
      73             :         , FieldType(struct_type_t::STRUCT_TYPE_REFERENCE)
      74             :     ),
      75             :     // followed by actual index entries (g_entry_index_item)
      76             :     end_descriptions()
      77             : };
      78             : 
      79             : 
      80             : constexpr descriptions_by_version_t const g_descriptions_by_version[] =
      81             : {
      82             :     define_description_by_version(
      83             :         DescriptionVersion(0, 1),
      84             :         DescriptionDescription(g_description)
      85             :     ),
      86             :     end_descriptions_by_version()
      87             : };
      88             : 
      89             : 
      90             : 
      91             : }
      92             : // no name namespace
      93             : 
      94             : 
      95             : 
      96             : 
      97           0 : block_entry_index::block_entry_index(dbfile::pointer_t f, reference_t offset)
      98           0 :     : block(g_descriptions_by_version, f, offset)
      99             : {
     100           0 : }
     101             : 
     102             : 
     103           0 : uint32_t block_entry_index::get_count() const
     104             : {
     105           0 :     return static_cast<uint32_t>(f_structure->get_uinteger("count"));
     106             : }
     107             : 
     108             : 
     109           0 : void block_entry_index::set_count(uint32_t count)
     110             : {
     111           0 :     f_structure->set_uinteger("count", count);
     112           0 : }
     113             : 
     114             : 
     115           0 : uint32_t block_entry_index::get_size() const
     116             : {
     117           0 :     return static_cast<uint32_t>(f_structure->get_uinteger("size"));
     118             : }
     119             : 
     120             : 
     121           0 : void block_entry_index::set_size(uint32_t size)
     122             : {
     123           0 :     f_structure->set_uinteger("size", size);
     124           0 : }
     125             : 
     126             : 
     127           0 : reference_t block_entry_index::get_next() const
     128             : {
     129           0 :     return static_cast<reference_t>(f_structure->get_uinteger("next"));
     130             : }
     131             : 
     132             : 
     133           0 : void block_entry_index::set_next(reference_t offset)
     134             : {
     135           0 :     f_structure->set_uinteger("next", offset);
     136           0 : }
     137             : 
     138             : 
     139           0 : reference_t block_entry_index::get_previous() const
     140             : {
     141           0 :     return static_cast<reference_t>(f_structure->get_uinteger("previous"));
     142             : }
     143             : 
     144             : 
     145           0 : void block_entry_index::set_previous(reference_t offset)
     146             : {
     147           0 :     f_structure->set_uinteger("previous", offset);
     148           0 : }
     149             : 
     150             : 
     151             : 
     152             : 
     153             : 
     154             : 
     155             : 
     156             : } // namespace snapdatabase
     157             : // vim: ts=4 sw=4 et