Move all command implementations into a single 'commands' directory.

[pspp] / src / language / commands / freq.h

diff --git a/src/language/commands/freq.h b/src/language/commands/freq.h
new file mode 100644 (file)
index 0000000..fcb0e3f
--- /dev/null
+++ b/src/language/commands/freq.h
@@ -0,0 +1,61 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2006, 2010, 2015 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 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef LANGUAGE_STATS_FREQ_H
+#define LANGUAGE_STATS_FREQ_H 1
+
+#include "data/value.h"
+#include "libpspp/hmap.h"
+
+/* Frequency table entry. */
+struct freq
+  {
+    struct hmap_node node;      /* Element in hash table. */
+    double count;              /* The number of occurrences of the value. */
+    union value values[1];      /* The value. */
+  };
+
+
+struct freq *freq_clone (const struct freq *, int values, int *widths);
+void freq_destroy (struct freq *f, int values, int *widths);
+
+
+static inline size_t
+table_entry_size (size_t n_values)
+{
+  return (offsetof (struct freq, values)
+          + n_values * sizeof (union value));
+}
+
+
+int compare_freq_ptr_3way (const void *a_, const void *b_, const void *width_);
+
+
+
+void freq_hmap_destroy (struct hmap *, int width);
+
+struct freq *freq_hmap_search (struct hmap *, const union value *, int width,
+                               size_t hash);
+struct freq *freq_hmap_insert (struct hmap *, const union value *, int width,
+                               size_t hash);
+
+struct freq **freq_hmap_sort (struct hmap *, int width);
+struct freq *freq_hmap_extract (struct hmap *);
+
+
+
+
+#endif /* language/commands/freq.h */