1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2009, 2010, 2011, 2012, 2013,
3 2014, 2020 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 #ifndef DATA_VARIABLE_H
19 #define DATA_VARIABLE_H 1
23 #include "data/dict-class.h"
24 #include "data/missing-values.h"
25 #include "data/val-type.h"
26 #include "data/settings.h"
28 /* Bitfields to identify traits of a variable */
30 #define VAR_TRAIT_NAME 0x0001
31 #define VAR_TRAIT_WIDTH 0x0002
32 #define VAR_TRAIT_ROLE 0x0004
33 #define VAR_TRAIT_LABEL 0x0008
34 #define VAR_TRAIT_VALUE_LABELS 0x0010
35 #define VAR_TRAIT_MISSING_VALUES 0x0020
36 #define VAR_TRAIT_ALIGNMENT 0x0040
37 #define VAR_TRAIT_MEASURE 0x0080
38 #define VAR_TRAIT_DISPLAY_WIDTH 0x0100
39 #define VAR_TRAIT_LEAVE 0x0200
40 #define VAR_TRAIT_POSITION 0x0400
41 #define VAR_TRAIT_ATTRIBUTES 0x0800
42 #define VAR_TRAIT_PRINT_FORMAT 0x1000
43 #define VAR_TRAIT_WRITE_FORMAT 0x2000
49 These functions should rarely be called directly: use
50 dict_create_var, dict_clone_var, or dict_delete_var
52 struct variable *var_create (const char *name, int width);
53 struct variable *var_clone (const struct variable *);
54 struct variable * var_ref (struct variable *) WARN_UNUSED_RESULT;
55 void var_unref (struct variable *);
58 const char *var_get_name (const struct variable *);
59 void var_set_name (struct variable *, const char *);
60 enum dict_class var_get_dict_class (const struct variable *);
62 int compare_vars_by_name (const void *, const void *, const void *);
63 unsigned hash_var_by_name (const void *, const void *);
65 int compare_var_ptrs_by_name (const void *, const void *, const void *);
66 unsigned hash_var_ptr_by_name (const void *, const void *);
68 int compare_var_ptrs_by_dict_index (const void *, const void *, const void *);
72 /* Types and widths of values associated with a variable. */
73 enum val_type var_get_type (const struct variable *);
74 int var_get_width (const struct variable *);
75 void var_set_width (struct variable *, int width);
76 void var_set_width_and_formats (struct variable *v, int new_width,
77 const struct fmt_spec *print, const struct fmt_spec *write);
79 bool var_is_numeric (const struct variable *);
80 bool var_is_alpha (const struct variable *);
82 /* Variables' missing values. */
83 const struct missing_values *var_get_missing_values (const struct variable *);
84 void var_set_missing_values (struct variable *, const struct missing_values *);
85 void var_clear_missing_values (struct variable *);
86 bool var_has_missing_values (const struct variable *);
88 bool var_is_value_missing (const struct variable *, const union value *,
90 bool var_is_num_missing (const struct variable *, double, enum mv_class);
91 bool var_is_str_missing (const struct variable *, const uint8_t[], enum mv_class);
94 const char *var_lookup_value_label (const struct variable *,
97 void var_append_value_name (const struct variable *, const union value *,
99 void var_append_value_name__ (const struct variable *, const union value *,
100 enum settings_value_show, struct string *);
102 bool var_has_value_labels (const struct variable *);
103 const struct val_labs *var_get_value_labels (const struct variable *);
104 void var_set_value_labels (struct variable *, const struct val_labs *);
106 bool var_add_value_label (struct variable *,
107 const union value *, const char *);
108 void var_replace_value_label (struct variable *,
109 const union value *, const char *);
110 void var_clear_value_labels (struct variable *);
112 /* Print and write formats. */
113 const struct fmt_spec *var_get_print_format (const struct variable *);
114 void var_set_print_format (struct variable *, const struct fmt_spec *);
115 const struct fmt_spec *var_get_write_format (const struct variable *);
116 void var_set_write_format (struct variable *, const struct fmt_spec *);
117 void var_set_both_formats (struct variable *, const struct fmt_spec *);
119 struct fmt_spec var_default_formats (int width);
121 /* Variable labels. */
122 const char *var_to_string (const struct variable *);
123 const char *var_get_label (const struct variable *);
124 void var_set_label (struct variable *, const char *label);
125 void var_clear_label (struct variable *);
126 bool var_has_label (const struct variable *);
128 /* How data is measured. */
137 bool measure_is_valid (enum measure);
138 const char *measure_to_string (enum measure);
139 const char *measure_to_syntax (enum measure);
141 enum measure var_get_measure (const struct variable *);
142 void var_set_measure (struct variable *, enum measure);
144 enum measure var_default_measure (enum val_type);
146 /* Intended usage of a variable, for populating dialogs. */
157 bool var_role_is_valid (enum var_role);
158 const char *var_role_to_string (enum var_role);
159 const char *var_role_to_syntax (enum var_role);
161 enum var_role var_get_role (const struct variable *);
162 void var_set_role (struct variable *, enum var_role);
164 /* GUI display width. */
165 int var_get_display_width (const struct variable *);
166 void var_set_display_width (struct variable *, int display_width);
168 int var_default_display_width (int width);
170 /* Alignment of data for display. */
178 bool alignment_is_valid (enum alignment);
179 const char *alignment_to_string (enum alignment);
180 const char *alignment_to_syntax (enum alignment);
182 enum alignment var_get_alignment (const struct variable *);
183 void var_set_alignment (struct variable *, enum alignment);
185 enum alignment var_default_alignment (enum val_type);
187 /* Whether variables' values should be preserved from case to
189 bool var_get_leave (const struct variable *);
190 void var_set_leave (struct variable *, bool leave);
191 bool var_must_leave (const struct variable *);
194 size_t var_get_n_short_names (const struct variable *);
195 const char *var_get_short_name (const struct variable *, size_t idx);
196 void var_set_short_name (struct variable *, size_t, const char *);
197 void var_clear_short_names (struct variable *);
199 /* Relationship with dictionary. */
200 size_t var_get_dict_index (const struct variable *);
201 size_t var_get_case_index (const struct variable *);
203 /* Custom attributes. */
204 struct attrset *var_get_attributes (const struct variable *);
205 void var_set_attributes (struct variable *, const struct attrset *);
206 bool var_has_attributes (const struct variable *);
209 const char *var_get_encoding (const struct variable *);
211 /* Function types. */
212 typedef bool var_predicate_func (const struct variable *);
214 double var_force_valid_weight (const struct variable *wv, double w,
215 bool *warn_on_invalid);
217 #endif /* data/variable.h */