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

[pspp] / src / language / commands / sort-cases.c

diff --git a/src/language/commands/sort-cases.c b/src/language/commands/sort-cases.c
new file mode 100644 (file)
index 0000000..37a1637
--- /dev/null
+++ b/src/language/commands/sort-cases.c
@@ -0,0 +1,76 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 1997-9, 2000, 2010, 2011 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/>. */
+
+#include <config.h>
+
+#include <limits.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "data/dataset.h"
+#include "data/settings.h"
+#include "data/subcase.h"
+#include "data/variable.h"
+#include "language/command.h"
+#include "language/lexer/lexer.h"
+#include "language/commands/sort-criteria.h"
+#include "libpspp/message.h"
+#include "math/sort.h"
+
+#include "gl/xalloc.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+
+/* Performs the SORT CASES procedures. */
+int
+cmd_sort_cases (struct lexer *lexer, struct dataset *ds)
+{
+  struct subcase ordering = SUBCASE_EMPTY_INITIALIZER;
+  bool ok = false;
+
+  lex_match (lexer, T_BY);
+
+  proc_cancel_temporary_transformations (ds);
+  if (!parse_sort_criteria (lexer, dataset_dict (ds), &ordering, NULL, NULL))
+    return CMD_CASCADING_FAILURE;
+
+  if (settings_get_testing_mode () && lex_match (lexer, T_SLASH))
+    {
+      if (!lex_force_match_id (lexer, "BUFFERS"))
+        goto done;
+      lex_match (lexer, T_EQUALS);
+      if (!lex_force_int_range (lexer, "BUFFERS", 2, INT_MAX))
+        goto done;
+      min_buffers = max_buffers = lex_integer (lexer);
+      lex_get (lexer);
+    }
+
+  proc_discard_output (ds);
+  struct casereader *output = sort_execute (proc_open_filtering (ds, false),
+                                            &ordering);
+  ok = proc_commit (ds);
+  ok = dataset_set_source (ds, output) && ok;
+
+ done:
+  min_buffers = 64;
+  max_buffers = INT_MAX;
+
+  subcase_uninit (&ordering);
+  return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
+}
+