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

[pspp] / src / language / commands / weight.c

diff --git a/src/language/commands/weight.c b/src/language/commands/weight.c
new file mode 100644 (file)
index 0000000..d99c2ac
--- /dev/null
+++ b/src/language/commands/weight.c
@@ -0,0 +1,64 @@
+/* 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 <stdio.h>
+
+#include "data/dataset.h"
+#include "data/dictionary.h"
+#include "data/variable.h"
+#include "language/command.h"
+#include "language/lexer/lexer.h"
+#include "language/lexer/variable-parser.h"
+#include "libpspp/message.h"
+#include "libpspp/str.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+int
+cmd_weight (struct lexer *lexer, struct dataset *ds)
+{
+  struct dictionary *dict = dataset_dict (ds);
+  if (lex_match_id (lexer, "OFF"))
+    dict_set_weight (dataset_dict (ds), NULL);
+  else
+    {
+      struct variable *v;
+
+      lex_match (lexer, T_BY);
+      v = parse_variable (lexer, dict);
+      if (!v)
+       return CMD_CASCADING_FAILURE;
+      if (var_is_alpha (v))
+       {
+         lex_next_error (lexer, -1, -1,
+                          _("The weighting variable must be numeric."));
+         return CMD_CASCADING_FAILURE;
+       }
+      if (dict_class_from_id (var_get_name (v)) == DC_SCRATCH)
+       {
+         lex_next_error (lexer, -1, -1,
+                          _("The weighting variable may not be scratch."));
+         return CMD_CASCADING_FAILURE;
+       }
+
+      dict_set_weight (dict, v);
+    }
+
+  return CMD_SUCCESS;
+}