+/* PSPP - computes sample statistics.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+ Written by Ben Pfaff <blp@gnu.org>.
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <data/dictionary.h>
+#include <data/procedure.h>
+#include <language/command.h>
+#include <language/lexer/variable-parser.h>
+#include <libpspp/message.h>
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+/* Performs DELETE VARIABLES command. */
+int
+cmd_delete_variables (struct lexer *lexer, struct dataset *ds)
+{
+ struct variable **vars;
+ size_t var_cnt;
+
+ if (proc_make_temporary_transformations_permanent (ds))
+ msg (SE, _("DELETE VARIABLES may not be used after TEMPORARY. "
+ "Temporary transformations will be made permanent."));
+
+ if (!parse_variables (lexer, dataset_dict (ds), &vars, &var_cnt, PV_NONE))
+ goto error;
+ if (var_cnt == dict_get_var_cnt (dataset_dict (ds)))
+ {
+ msg (SE, _("DELETE VARIABLES may not be used to delete all variables "
+ "from the active file dictionary. Use NEW FILE instead."));
+ goto error;
+ }
+
+ if (!procedure (ds, NULL, NULL))
+ goto error;
+
+ dict_delete_vars (dataset_dict (ds), vars, var_cnt);
+ free (vars);
+
+ return CMD_SUCCESS;
+
+ error:
+ free (vars);
+ return CMD_CASCADING_FAILURE;
+}