1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #ifndef OUTPUT_ITEM_PROVIDER_H
18 #define OUTPUT_ITEM_PROVIDER_H 1
20 #include <output/output-item.h>
22 /* Class structure for an output item.
24 This structure must be provided by an output_item subclass to initialize an
25 instance of output_item. */
26 struct output_item_class
28 /* Destroys and frees ITEM. Called when output_item_unref() drops ITEM's
29 reference count to 0. */
30 void (*destroy) (struct output_item *item);
33 void output_item_init (struct output_item *, const struct output_item_class *);
35 #endif /* output/output-item-provider.h */