1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 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
28 struct casefile_factory;
30 extern int min_buffers ;
31 extern int max_buffers ;
32 extern bool allow_internal_sort ;
38 SRT_ASCEND, /* A, B, C, ..., X, Y, Z. */
39 SRT_DESCEND /* Z, Y, X, ..., C, B, A. */
42 /* A sort criterion. */
45 int fv; /* Variable data index. */
46 int width; /* 0=numeric, otherwise string width. */
47 enum sort_direction dir; /* Sort direction. */
50 /* A set of sort criteria. */
53 struct sort_criterion *crits;
58 void sort_destroy_criteria (struct sort_criteria *);
60 struct casefile *sort_execute (struct casereader *,
61 const struct sort_criteria *,
62 struct casefile_factory *
66 bool sort_active_file_in_place (struct dataset *ds,
67 const struct sort_criteria *);
69 struct casefile *sort_active_file_to_casefile (struct dataset *ds,
70 const struct sort_criteria *);