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

[pspp] / src / language / commands / rename-variables.c

diff --git a/src/language/commands/rename-variables.c b/src/language/commands/rename-variables.c
new file mode 100644 (file)
index 0000000..28af671
--- /dev/null
+++ b/src/language/commands/rename-variables.c
@@ -0,0 +1,112 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 1997-9, 2000, 2010, 2011, 2015, 2016 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 <stdlib.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 "gl/xalloc.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+int
+cmd_rename_variables (struct lexer *lexer, struct dataset *ds)
+{
+  struct variable **vars_to_be_renamed = NULL;
+  size_t n_vars_to_be_renamed = 0;
+
+  char **new_names = NULL;
+  size_t n_new_names = 0;
+
+  char *err_name;
+
+  int status = CMD_CASCADING_FAILURE;
+
+  if (proc_make_temporary_transformations_permanent (ds))
+    lex_ofs_error (lexer, 0, lex_ofs (lexer) - 1,
+                   _("%s may not be used after %s.  "
+                     "Temporary transformations will be made permanent."),
+                   "RENAME VARS", "TEMPORARY");
+
+  do
+    {
+      int opts = PV_APPEND | PV_NO_DUPLICATE;
+
+      if (!lex_match (lexer, T_LPAREN))
+        opts |= PV_SINGLE;
+      int start_ofs = lex_ofs (lexer);
+      if (!parse_variables (lexer, dataset_dict (ds),
+                            &vars_to_be_renamed, &n_vars_to_be_renamed, opts))
+       {
+         goto lossage;
+       }
+      if (!lex_force_match (lexer, T_EQUALS))
+       {
+         goto lossage;
+       }
+      if (!parse_DATA_LIST_vars (lexer, dataset_dict (ds),
+                                 &new_names, &n_new_names, opts))
+       {
+         goto lossage;
+       }
+      int end_ofs = lex_ofs (lexer) - 1;
+      if (n_new_names != n_vars_to_be_renamed)
+        {
+          lex_ofs_error (lexer, start_ofs, end_ofs,
+                         _("Differing number of variables in old name list "
+                           "(%zu) and in new name list (%zu)."),
+              n_vars_to_be_renamed, n_new_names);
+          goto lossage;
+        }
+      if (!(opts & PV_SINGLE) && !lex_force_match (lexer, T_RPAREN))
+       {
+         goto lossage;
+       }
+    }
+  while (lex_token (lexer) != T_ENDCMD);
+
+  if (!dict_rename_vars (dataset_dict (ds),
+                         vars_to_be_renamed, new_names, n_new_names,
+                         &err_name))
+    {
+      lex_ofs_error (lexer, 2, lex_ofs (lexer) - 1,
+                     _("Renaming would duplicate variable name %s."), err_name);
+      goto lossage;
+    }
+
+  status = CMD_SUCCESS;
+
+ lossage:
+  free (vars_to_be_renamed);
+  if (new_names != NULL)
+    {
+      size_t i;
+      for (i = 0; i < n_new_names; ++i)
+        free (new_names[i]);
+      free (new_names);
+    }
+  return status;
+}