-/* PSPP - computes sample statistics.
- Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 1997-9, 2000, 2006, 2009, 2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- This program 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
- General Public License for more details.
+ This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef TRANSFORMATIONS_H
#define TRANSFORMATIONS_H 1
#include <stdbool.h>
#include <stddef.h>
+#include "data/case.h"
-typedef unsigned long casenumber ;
+/* One transformation. */
-/* trns_proc_func return values. */
-enum trns_result
+enum trns_result
{
- TRNS_CONTINUE = -1, /* Continue to next transformation. */
- TRNS_DROP_CASE = -2, /* Drop this case. */
- TRNS_ERROR = -3, /* A serious error, so stop the procedure. */
- TRNS_END_CASE = -4, /* Skip to next case. INPUT PROGRAM only. */
- TRNS_END_FILE = -5 /* End of input. INPUT PROGRAM only. */
+ TRNS_CONTINUE, /* Continue to next transformation. */
+ TRNS_BREAK, /* Break out of LOOP. */
+ TRNS_DROP_CASE, /* Drop this case. */
+ TRNS_ERROR, /* A serious error, so stop the procedure. */
+ TRNS_END_CASE, /* Skip to next case. INPUT PROGRAM only. */
+ TRNS_END_FILE /* End of input. INPUT PROGRAM only. */
};
struct ccase;
-typedef void trns_finalize_func (void *);
-typedef int trns_proc_func (void *, struct ccase *, casenumber);
-typedef bool trns_free_func (void *);
+
+struct trns_class
+ {
+ const char *name; /* For debugging. */
+ enum trns_result (*execute) (void *aux, struct ccase **, casenumber);
+ bool (*destroy) (void *aux);
+ };
+
+struct transformation
+ {
+ const struct trns_class *class;
+ void *aux;
+ };
\f
-/* Transformation chains. */
+/* A chain of transformations. */
-struct trns_chain *trns_chain_create (void);
-void trns_chain_finalize (struct trns_chain *);
-bool trns_chain_destroy (struct trns_chain *);
+struct trns_chain
+ {
+ struct transformation *xforms;
+ size_t n;
+ size_t allocated;
+ };
-bool trns_chain_is_empty (const struct trns_chain *);
+#define TRNS_CHAIN_INIT { .n = 0 }
-void trns_chain_append (struct trns_chain *, trns_finalize_func *,
- trns_proc_func *, trns_free_func *, void *);
-size_t trns_chain_next (struct trns_chain *);
-enum trns_result trns_chain_execute (struct trns_chain *, enum trns_result,
- struct ccase *, const size_t *case_nr);
+void trns_chain_init (struct trns_chain *);
+bool trns_chain_uninit (struct trns_chain *);
+bool trns_chain_clear (struct trns_chain *);
+
+void trns_chain_append (struct trns_chain *, const struct transformation *);
void trns_chain_splice (struct trns_chain *, struct trns_chain *);
+enum trns_result trns_chain_execute (const struct trns_chain *,
+ casenumber case_num, struct ccase **);
+
#endif /* transformations.h */