1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 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, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24 #include <data/procedure.h>
25 #include <data/value-labels.h>
26 #include <data/variable.h>
27 #include <language/command.h>
28 #include <language/lexer/lexer.h>
29 #include <language/lexer/variable-parser.h>
30 #include <libpspp/alloc.h>
31 #include <libpspp/hash.h>
32 #include <libpspp/message.h>
33 #include <libpspp/str.h>
36 #define _(msgid) gettext (msgid)
40 static int do_value_labels (struct lexer *,
41 const struct dictionary *dict, bool);
42 static int verify_val_labs (struct variable **vars, size_t var_cnt);
43 static void erase_labels (struct variable **vars, size_t var_cnt);
44 static int get_label (struct lexer *, struct variable **vars, size_t var_cnt);
49 cmd_value_labels (struct lexer *lexer, struct dataset *ds)
51 return do_value_labels (lexer, dataset_dict (ds), true);
55 cmd_add_value_labels (struct lexer *lexer, struct dataset *ds)
57 return do_value_labels (lexer, dataset_dict (ds), false);
63 do_value_labels (struct lexer *lexer, const struct dictionary *dict, bool erase)
65 struct variable **vars; /* Variable list. */
66 size_t var_cnt; /* Number of variables. */
67 int parse_err=0; /* true if error parsing variables */
69 lex_match (lexer, '/');
71 while (lex_token (lexer) != '.')
73 parse_err = !parse_variables (lexer, dict, &vars, &var_cnt,
80 if (!verify_val_labs (vars, var_cnt))
83 erase_labels (vars, var_cnt);
84 while (lex_token (lexer) != '/' && lex_token (lexer) != '.')
85 if (!get_label (lexer, vars, var_cnt))
88 if (lex_token (lexer) != '/')
102 return lex_end_of_command (lexer);
109 /* Verifies that none of the VAR_CNT variables in VARS are long
112 verify_val_labs (struct variable **vars, size_t var_cnt)
116 for (i = 0; i < var_cnt; i++)
118 const struct variable *vp = vars[i];
120 if (var_is_long_string (vp))
122 msg (SE, _("It is not possible to assign value labels to long "
123 "string variables such as %s."), var_get_name (vp));
130 /* Erases all the labels for the VAR_CNT variables in VARS. */
132 erase_labels (struct variable **vars, size_t var_cnt)
136 /* Erase old value labels if desired. */
137 for (i = 0; i < var_cnt; i++)
138 var_clear_value_labels (vars[i]);
141 /* Parse all the labels for the VAR_CNT variables in VARS and add
142 the specified labels to those variables. */
144 get_label (struct lexer *lexer, struct variable **vars, size_t var_cnt)
146 /* Parse all the labels and add them to the variables. */
154 if (var_is_alpha (vars[0]))
156 if (lex_token (lexer) != T_STRING)
158 lex_error (lexer, _("expecting string"));
161 buf_copy_str_rpad (value.s, MAX_SHORT_STRING, ds_cstr (lex_tokstr (lexer)));
165 if (!lex_is_number (lexer))
167 lex_error (lexer, _("expecting integer"));
170 if (!lex_is_integer (lexer))
171 msg (SW, _("Value label `%g' is not integer."), lex_tokval (lexer));
172 value.f = lex_tokval (lexer);
175 lex_match (lexer, ',');
178 if (!lex_force_string (lexer))
181 ds_init_string (&label, lex_tokstr (lexer));
183 if (ds_length (&label) > 60)
185 msg (SW, _("Truncating value label to 60 characters."));
186 ds_truncate (&label, 60);
189 for (i = 0; i < var_cnt; i++)
190 var_replace_value_label (vars[i], &value, ds_cstr (&label));
195 lex_match (lexer, ',');
197 while (lex_token (lexer) != '/' && lex_token (lexer) != '.');