1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
3 Written by Ben Pfaff <blp@gnu.org>.
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
32 const struct case_sink_class *class; /* Class. */
33 void *aux; /* Auxiliary data. */
34 size_t value_cnt; /* Number of `union value's in case. */
37 /* A case sink class. */
38 struct case_sink_class
40 const char *name; /* Identifying name. */
42 /* Opens the sink for writing. */
43 void (*open) (struct case_sink *);
45 /* Writes a case to the sink. */
46 bool (*write) (struct case_sink *, const struct ccase *);
48 /* Closes and destroys the sink. */
49 void (*destroy) (struct case_sink *);
51 /* Closes the sink and returns a source that can read back
52 the cases that were written, perhaps transformed in some
53 way. The sink must still be separately destroyed by
55 struct case_source *(*make_source) (struct case_sink *);
58 extern const struct case_sink_class null_sink_class;
60 struct case_sink *create_case_sink (const struct case_sink_class *,
61 const struct dictionary *,
63 void free_case_sink (struct case_sink *);
65 #endif /* case-sink.h */