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/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2017 Kouhei Sutou <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*/
#include "mrn_table_fields_offset_mover.hpp"
namespace mrn {
FieldTableChanger::FieldTableChanger(TABLE *table,
TABLE *new_table)
: old_table_(table),
new_table_(new_table) {
my_ptrdiff_t diff =
PTR_BYTE_DIFF(new_table_->record[0], old_table_->record[0]);
uint n_columns = old_table_->s->fields;
for (uint i = 0; i < n_columns; ++i) {
Field *field = old_table_->field[i];
field->move_field_offset(diff);
field->table = new_table;
}
}
FieldTableChanger::~FieldTableChanger() {
my_ptrdiff_t diff =
PTR_BYTE_DIFF(new_table_->record[0], old_table_->record[0]);
uint n_columns = old_table_->s->fields;
for (uint i = 0; i < n_columns; ++i) {
Field *field = old_table_->field[i];
field->move_field_offset(-diff);
field->table = old_table_;
}
}
}
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