+++ /dev/null
-/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2006, 2007, 2008, 2010, 2011,
- 2019, 2020 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 "language/data-io/trim.h"
-
-#include <stdlib.h>
-
-#include "data/dictionary.h"
-#include "data/variable.h"
-#include "language/lexer/lexer.h"
-#include "language/lexer/variable-parser.h"
-#include "libpspp/message.h"
-#include "libpspp/misc.h"
-
-#include "gl/xalloc.h"
-
-#include "gettext.h"
-#define _(msgid) gettext (msgid)
-
-/* Commands that read and write system files share a great deal of common
- syntactic structure for rearranging and dropping variables. This function
- parses this syntax and modifies DICT appropriately. Returns true on
- success, false on failure. */
-bool
-parse_dict_trim (struct lexer *lexer, struct dictionary *dict)
-{
- if (lex_match_id (lexer, "MAP"))
- {
- /* FIXME. */
- return true;
- }
- else if (lex_match_id (lexer, "DROP"))
- return parse_dict_drop (lexer, dict);
- else if (lex_match_id (lexer, "KEEP"))
- return parse_dict_keep (lexer, dict);
- else if (lex_match_id (lexer, "RENAME"))
- return parse_dict_rename (lexer, dict);
- else
- {
- lex_error_expecting (lexer, "MAP", "DROP", "KEEP", "RENAME");
- return false;
- }
-}
-
-/* Parses and performs the RENAME subcommand of GET, SAVE, and
- related commands. */
-bool
-parse_dict_rename (struct lexer *lexer, struct dictionary *dict)
-{
- lex_match (lexer, T_EQUALS);
- int start_ofs = lex_ofs (lexer);
-
- struct variable **old_vars = NULL;
- size_t n_old_vars = 0;
-
- char **new_vars = NULL;
- size_t n_new_vars = 0;
-
- bool ok = false;
- while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
- {
- size_t prev_n_old = n_old_vars;
- size_t prev_n_new = n_new_vars;
-
- bool paren = lex_match (lexer, T_LPAREN);
- int pv_opts = PV_NO_DUPLICATE | PV_APPEND | (paren ? 0 : PV_SINGLE);
-
- int old_vars_start = lex_ofs (lexer);
- if (!parse_variables (lexer, dict, &old_vars, &n_old_vars, pv_opts))
- goto done;
- int old_vars_end = lex_ofs (lexer) - 1;
-
- if (!lex_force_match (lexer, T_EQUALS))
- goto done;
-
- int new_vars_start = lex_ofs (lexer);
- if (!parse_DATA_LIST_vars (lexer, dict, &new_vars, &n_new_vars, pv_opts))
- goto done;
- int new_vars_end = lex_ofs (lexer) - 1;
-
- if (paren && !lex_force_match (lexer, T_RPAREN))
- goto done;
-
- if (n_new_vars != n_old_vars)
- {
- size_t added_old = n_old_vars - prev_n_old;
- size_t added_new = n_new_vars - prev_n_new;
-
- msg (SE, _("Old and new variable counts do not match."));
- lex_ofs_msg (lexer, SN, old_vars_start, old_vars_end,
- ngettext ("There is %zu old variable.",
- "There are %zu old variables.", added_old),
- added_old);
- lex_ofs_msg (lexer, SN, new_vars_start, new_vars_end,
- ngettext ("There is %zu new variable name.",
- "There are %zu new variable names.",
- added_new),
- added_new);
- goto done;
- }
- }
- int end_ofs = lex_ofs (lexer) - 1;
-
- char *dup_name = NULL;
- if (!dict_rename_vars (dict, old_vars, new_vars, n_new_vars, &dup_name))
- {
- lex_ofs_error (lexer, start_ofs, end_ofs,
- _("Requested renaming duplicates variable name %s."),
- dup_name);
- goto done;
- }
- ok = true;
-
-done:
- free (old_vars);
- for (size_t i = 0; i < n_new_vars; ++i)
- free (new_vars[i]);
- free (new_vars);
- return ok;
-}
-
-/* Parses and performs the DROP subcommand of GET, SAVE, and
- related commands.
- Returns true if successful, false on failure.*/
-bool
-parse_dict_drop (struct lexer *lexer, struct dictionary *dict)
-{
- int start_ofs = lex_ofs (lexer) - 1;
- lex_match (lexer, T_EQUALS);
-
- struct variable **v;
- size_t nv;
- if (!parse_variables (lexer, dict, &v, &nv, PV_NONE))
- return false;
- dict_delete_vars (dict, v, nv);
- free (v);
-
- if (dict_get_n_vars (dict) == 0)
- {
- lex_ofs_error (lexer, start_ofs, lex_ofs (lexer) - 1,
- _("Cannot DROP all variables from dictionary."));
- return false;
- }
- return true;
-}
-
-/* Parses and performs the KEEP subcommand of GET, SAVE, and
- related commands.
- Returns true if successful, false on failure.*/
-bool
-parse_dict_keep (struct lexer *lexer, struct dictionary *dict)
-{
- struct variable **v;
- size_t nv;
- size_t i;
-
- lex_match (lexer, T_EQUALS);
- if (!parse_variables (lexer, dict, &v, &nv, PV_NONE))
- return false;
-
- /* Move the specified variables to the beginning. */
- dict_reorder_vars (dict, v, nv);
-
- /* Delete the remaining variables. */
- if (dict_get_n_vars (dict) == nv)
- {
- free (v);
- return true;
- }
-
- v = xnrealloc (v, dict_get_n_vars (dict) - nv, sizeof *v);
- for (i = nv; i < dict_get_n_vars (dict); i++)
- v[i - nv] = dict_get_var (dict, i);
- dict_delete_vars (dict, v, dict_get_n_vars (dict) - nv);
- free (v);
-
- return true;
-}
projects / pspp / blobdiff