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_blob.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             : // 'BLOB'
      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("size")
      61             :         , FieldType(struct_type_t::STRUCT_TYPE_UINT32)
      62             :     ),
      63             :     define_description(
      64             :           FieldName("next_blob")    // blob is so big we need multiple buffers
      65             :         , FieldType(struct_type_t::STRUCT_TYPE_REFERENCE)
      66             :     ),
      67             :     end_descriptions()
      68             : };
      69             : 
      70             : 
      71             : constexpr descriptions_by_version_t const g_descriptions_by_version[] =
      72             : {
      73             :     define_description_by_version(
      74             :         DescriptionVersion(0, 1),
      75             :         DescriptionDescription(g_description)
      76             :     ),
      77             :     end_descriptions_by_version()
      78             : };
      79             : 
      80             : 
      81             : 
      82             : }
      83             : // no name namespace
      84             : 
      85             : 
      86             : 
      87             : 
      88           0 : block_blob::block_blob(dbfile::pointer_t f, reference_t offset)
      89           0 :     : block(g_descriptions_by_version, f, offset)
      90             : {
      91           0 : }
      92             : 
      93             : 
      94           0 : uint32_t block_blob::get_size()
      95             : {
      96           0 :     return static_cast<uint32_t>(f_structure->get_uinteger("size"));
      97             : }
      98             : 
      99             : 
     100           0 : void block_blob::set_size(uint32_t size)
     101             : {
     102           0 :     f_structure->set_uinteger("size", size);
     103           0 : }
     104             : 
     105             : 
     106           0 : reference_t block_blob::get_next_blob()
     107             : {
     108           0 :     return static_cast<reference_t>(f_structure->get_uinteger("next_blob"));
     109             : }
     110             : 
     111             : 
     112           0 : void block_blob::set_next_blob(reference_t offset)
     113             : {
     114           0 :     f_structure->set_uinteger("next_blob", offset);
     115           0 : }
     116             : 
     117             : 
     118             : 
     119             : 
     120             : 
     121             : } // namespace snapdatabase
     122             : // vim: ts=4 sw=4 et