1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2006, 2010, 2015 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 LANGUAGE_STATS_FREQ_H
18 #define LANGUAGE_STATS_FREQ_H 1
20 #include "data/value.h"
21 #include "libpspp/hmap.h"
23 /* Frequency table entry. */
26 struct hmap_node node; /* Element in hash table. */
27 double count; /* The number of occurrences of the value. */
28 union value values[1]; /* The value. */
32 struct freq *freq_clone (const struct freq *, int values, int *widths);
33 void freq_destroy (struct freq *f, int values, int *widths);
37 table_entry_size (size_t n_values)
39 return (offsetof (struct freq, values)
40 + n_values * sizeof (union value));
44 int compare_freq_ptr_3way (const void *a_, const void *b_, const void *width_);
48 void freq_hmap_destroy (struct hmap *, int width);
50 struct freq *freq_hmap_search (struct hmap *, const union value *, int width,
52 struct freq *freq_hmap_insert (struct hmap *, const union value *, int width,
55 struct freq **freq_hmap_sort (struct hmap *, int width);
56 struct freq *freq_hmap_extract (struct hmap *);
61 #endif /* language/stats/freq.h */