1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 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
23 #include <libpspp/hash.h>
24 #include <libpspp/str.h>
29 The caller is responsible for freeing the returned value. */
31 value_dup (const union value *val, int width)
33 return xmemdup (val, MAX (width, sizeof *val));
36 /* Compares A and B, which both have the given WIDTH, and returns
37 a strcmp()-type result.
38 Only the short string portion of longer strings are
41 compare_values (const union value *a, const union value *b, int width)
44 ? (a->f < b->f ? -1 : a->f > b->f)
45 : memcmp (a->s, b->s, MIN (MAX_SHORT_STRING, width)));
48 /* Create a hash of V, which has the given WIDTH.
49 Only the short string portion of a longer string is hashed. */
51 hash_value (const union value *v, int width)
54 ? hsh_hash_double (v->f)
55 : hsh_hash_bytes (v->s, MIN (MAX_SHORT_STRING, width)));