1 /* PSPP - computes sample statistics.
2 Copyright (C) 2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 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, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include <data/casewriter.h>
22 #include <data/casewriter-provider.h>
26 #include <libpspp/taint.h>
30 struct casewriter_translator
32 struct casewriter *subwriter;
34 void (*translate) (const struct ccase *input, struct ccase *output,
36 bool (*destroy) (void *aux);
40 static struct casewriter_class casewriter_translator_class;
43 casewriter_create_translator (struct casewriter *subwriter,
44 void (*translate) (const struct ccase *input,
47 bool (*destroy) (void *aux),
50 struct casewriter_translator *ct = xmalloc (sizeof *ct);
51 struct casewriter *writer;
52 ct->subwriter = casewriter_rename (subwriter);
53 ct->translate = translate;
54 ct->destroy = destroy;
56 writer = casewriter_create (&casewriter_translator_class, ct);
57 taint_propagate (casewriter_get_taint (ct->subwriter),
58 casewriter_get_taint (writer));
63 casewriter_translator_write (struct casewriter *writer UNUSED,
64 void *ct_, struct ccase *c)
66 struct casewriter_translator *ct = ct_;
69 ct->translate (c, &tmp, ct->aux);
70 casewriter_write (ct->subwriter, &tmp);
74 casewriter_translator_destroy (struct casewriter *writer UNUSED, void *ct_)
76 struct casewriter_translator *ct = ct_;
77 casewriter_destroy (ct->subwriter);
78 ct->destroy (ct->aux);
82 static struct casereader *
83 casewriter_translator_convert_to_reader (struct casewriter *writer UNUSED,
86 struct casewriter_translator *ct = ct_;
87 struct casereader *reader = casewriter_make_reader (ct->subwriter);
89 ct->destroy (ct->aux);
93 static struct casewriter_class casewriter_translator_class =
95 casewriter_translator_write,
96 casewriter_translator_destroy,
97 casewriter_translator_convert_to_reader,