src/builder.cc

   1 ///
   2 /// \file       builder.cc
   3 ///             Virtual protocol packet builder wrapper
   4 ///
   5
   6 /*
   7     Copyright (C) 2005-2012, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #include "i18n.h"
  23 #include "builder.h"
  24 #include <stdexcept>
  25 #include <string.h>
  26
  27 namespace Barry {
  28
  29 //////////////////////////////////////////////////////////////////////////////
  30 // DBDataBuilder class
  31
  32
  33 DBDataBuilder::DBDataBuilder(const DBData &orig)
  34         : m_orig(orig)
  35 {
  36 }
  37
  38 DBDataBuilder::~DBDataBuilder()
  39 {
  40 }
  41
  42 bool DBDataBuilder::BuildRecord(DBData &data, size_t &offset,
  43                                 const IConverter *ic)
  44 {
  45         if( offset == m_orig.GetOffset() ) {
  46                 data = m_orig;
  47         }
  48         else {
  49                 // copy the metadata
  50                 data.CopyMeta(m_orig);
  51
  52                 // copy the buffer, to the new offset
  53                 if( m_orig.GetOffset() > m_orig.GetData().GetSize() )
  54                         throw std::logic_error(_("DBDataBuilder: offset greater than size"));
  55                 size_t actual = m_orig.GetData().GetSize() - m_orig.GetOffset();
  56                 size_t total = offset + actual;
  57                 unsigned char *buf = data.UseData().GetBuffer(total);
  58                 memcpy(buf + offset,
  59                         m_orig.GetData().GetData() + m_orig.GetOffset(),
  60                         actual);
  61                 data.UseData().ReleaseBuffer(total);
  62
  63                 // set the new offset
  64                 data.SetOffset(offset);
  65         }
  66         return true;
  67 }
  68
  69 bool DBDataBuilder::FetchRecord(DBData &data, const IConverter *ic)
  70 {
  71         data = m_orig;
  72         return true;
  73 }
  74
  75 bool DBDataBuilder::EndOfFile() const
  76 {
  77         return true;
  78 }
  79
  80 } // namespace Barry
  81
  82