1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2009, 2010, 2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "data/dataset.h"
23 #include "data/dictionary.h"
24 #include "data/value-labels.h"
25 #include "data/variable.h"
26 #include "language/command.h"
27 #include "language/lexer/lexer.h"
28 #include "language/lexer/value-parser.h"
29 #include "language/lexer/variable-parser.h"
30 #include "libpspp/i18n.h"
31 #include "libpspp/message.h"
32 #include "libpspp/str.h"
34 #include "gl/xalloc.h"
37 #define _(msgid) gettext (msgid)
41 static int do_value_labels (struct lexer *,
42 const struct dictionary *dict, bool);
43 static void erase_labels (struct variable **vars, size_t n_vars);
44 static int get_label (struct lexer *, struct variable **vars, size_t n_vars,
45 const char *dict_encoding);
50 cmd_value_labels (struct lexer *lexer, struct dataset *ds)
52 return do_value_labels (lexer, dataset_dict (ds), true);
56 cmd_add_value_labels (struct lexer *lexer, struct dataset *ds)
58 return do_value_labels (lexer, dataset_dict (ds), false);
64 do_value_labels (struct lexer *lexer, const struct dictionary *dict, bool erase)
66 struct variable **vars; /* Variable list. */
67 size_t n_vars; /* Number of variables. */
68 int parse_err=0; /* true if error parsing variables */
70 lex_match (lexer, T_SLASH);
72 while (lex_token (lexer) != T_ENDCMD)
74 parse_err = !parse_variables (lexer, dict, &vars, &n_vars,
82 erase_labels (vars, n_vars);
83 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
84 if (!get_label (lexer, vars, n_vars, dict_get_encoding (dict)))
87 if (lex_token (lexer) != T_SLASH)
98 return parse_err ? CMD_FAILURE : CMD_SUCCESS;
105 /* Erases all the labels for the N_VARS variables in VARS. */
107 erase_labels (struct variable **vars, size_t n_vars)
109 /* Erase old value labels if desired. */
110 for (size_t i = 0; i < n_vars; i++)
111 var_clear_value_labels (vars[i]);
114 /* Parse all the labels for the N_VARS variables in VARS and add
115 the specified labels to those variables. */
117 get_label (struct lexer *lexer, struct variable **vars, size_t n_vars,
118 const char *dict_encoding)
120 /* Parse all the labels and add them to the variables. */
123 enum { MAX_LABEL_LEN = 255 };
124 int width = var_get_width (vars[0]);
131 value_init (&value, width);
132 if (!parse_value (lexer, &value, vars[0]))
134 value_destroy (&value, width);
137 lex_match (lexer, T_COMMA);
140 if (lex_token (lexer) != T_ID && !lex_force_string (lexer))
142 value_destroy (&value, width);
146 ds_init_substring (&label, lex_tokss (lexer));
148 trunc_len = utf8_encoding_trunc_len (ds_cstr (&label), dict_encoding,
150 if (ds_length (&label) > trunc_len)
152 msg (SW, _("Truncating value label to %d bytes."), MAX_LABEL_LEN);
153 ds_truncate (&label, trunc_len);
156 for (i = 0; i < n_vars; i++)
157 var_replace_value_label (vars[i], &value, ds_cstr (&label));
160 value_destroy (&value, width);
163 lex_match (lexer, T_COMMA);
165 while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD);