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