1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2006, 2009, 2011, 2013 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 TRANSFORMATIONS_H
18 #define TRANSFORMATIONS_H 1
23 #include "data/case.h"
25 /* trns_proc_func return values. */
28 TRNS_CONTINUE = INT_MIN, /* Continue to next transformation. */
29 TRNS_DROP_CASE, /* Drop this case. */
30 TRNS_ERROR, /* A serious error, so stop the procedure. */
31 TRNS_END_CASE, /* Skip to next case. INPUT PROGRAM only. */
32 TRNS_END_FILE /* End of input. INPUT PROGRAM only. */
36 typedef int trns_proc_func (void *, struct ccase **, casenumber);
37 typedef bool trns_free_func (void *);
38 typedef struct pxd_object *trns_save_func (void *, struct pxd *);
39 typedef void *trns_load_func (struct pxd_object *, const struct pxd *);
44 int (*execute) (struct trns_class *, struct ccase **, casenumber);
45 bool (*destroy) (struct ccase *);
49 /* Transformation chains. */
51 struct trns_chain *trns_chain_create (void);
52 void trns_chain_finalize (struct trns_chain *);
53 bool trns_chain_destroy (struct trns_chain *);
55 bool trns_chain_is_empty (const struct trns_chain *);
57 void trns_chain_append (struct trns_chain *,
58 trns_proc_func *, trns_free_func *, void *);
59 size_t trns_chain_next (struct trns_chain *);
60 enum trns_result trns_chain_execute (const struct trns_chain *,
61 enum trns_result, struct ccase **,
64 void trns_chain_splice (struct trns_chain *, struct trns_chain *);
66 #endif /* transformations.h */