1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2009, 2010 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/>. */
17 #ifndef DATA_VARIABLE_H
18 #define DATA_VARIABLE_H 1
22 #include <data/dict-class.h>
23 #include <data/missing-values.h>
24 #include <data/val-type.h>
29 These functions should rarely be called directly: use
30 dict_create_var, dict_clone_var, or dict_delete_var
32 struct variable *var_create (const char *name, int width);
33 struct variable *var_clone (const struct variable *);
34 void var_destroy (struct variable *);
37 #define VAR_NAME_LEN 64 /* Maximum length of variable name, in bytes. */
39 const char *var_get_name (const struct variable *);
40 void var_set_name (struct variable *, const char *);
41 bool var_is_valid_name (const char *, bool issue_error);
42 bool var_is_plausible_name (const char *name, bool issue_error);
43 enum dict_class var_get_dict_class (const struct variable *);
45 int compare_vars_by_name (const void *, const void *, const void *);
46 unsigned hash_var_by_name (const void *, const void *);
48 int compare_var_ptrs_by_name (const void *, const void *, const void *);
49 unsigned hash_var_ptr_by_name (const void *, const void *);
51 int compare_var_ptrs_by_dict_index (const void *, const void *, const void *);
53 /* Types and widths of values associated with a variable. */
54 enum val_type var_get_type (const struct variable *);
55 int var_get_width (const struct variable *);
56 void var_set_width (struct variable *, int width);
58 bool var_is_numeric (const struct variable *);
59 bool var_is_alpha (const struct variable *);
61 /* Variables' missing values. */
62 const struct missing_values *var_get_missing_values (const struct variable *);
63 void var_set_missing_values (struct variable *, const struct missing_values *);
64 void var_clear_missing_values (struct variable *);
65 bool var_has_missing_values (const struct variable *);
67 bool var_is_value_missing (const struct variable *, const union value *,
69 bool var_is_num_missing (const struct variable *, double, enum mv_class);
70 bool var_is_str_missing (const struct variable *, const uint8_t[], enum mv_class);
73 const char *var_lookup_value_label (const struct variable *,
76 void var_append_value_name (const struct variable *, const union value *,
80 var_get_value_name (const struct variable *v, const union value *value);
83 bool var_has_value_labels (const struct variable *);
84 const struct val_labs *var_get_value_labels (const struct variable *);
85 void var_set_value_labels (struct variable *, const struct val_labs *);
87 bool var_add_value_label (struct variable *,
88 const union value *, const char *);
89 void var_replace_value_label (struct variable *,
90 const union value *, const char *);
91 void var_clear_value_labels (struct variable *);
93 /* Print and write formats. */
94 const struct fmt_spec *var_get_print_format (const struct variable *);
95 void var_set_print_format (struct variable *, const struct fmt_spec *);
96 const struct fmt_spec *var_get_write_format (const struct variable *);
97 void var_set_write_format (struct variable *, const struct fmt_spec *);
98 void var_set_both_formats (struct variable *, const struct fmt_spec *);
100 struct fmt_spec var_default_formats (int width);
102 /* Variable labels. */
103 const char *var_to_string (const struct variable *);
104 const char *var_get_label (const struct variable *);
105 void var_set_label (struct variable *, const char *);
106 void var_clear_label (struct variable *);
107 bool var_has_label (const struct variable *);
109 /* How data is measured. */
118 bool measure_is_valid (enum measure);
119 enum measure var_get_measure (const struct variable *);
120 void var_set_measure (struct variable *, enum measure);
122 enum measure var_default_measure (enum val_type);
124 /* GUI display width. */
125 int var_get_display_width (const struct variable *);
126 void var_set_display_width (struct variable *, int display_width);
128 int var_default_display_width (int width);
130 /* Alignment of data for display. */
139 bool alignment_is_valid (enum alignment);
140 enum alignment var_get_alignment (const struct variable *);
141 void var_set_alignment (struct variable *, enum alignment);
143 enum alignment var_default_alignment (enum val_type);
145 /* Whether variables' values should be preserved from case to
147 bool var_get_leave (const struct variable *);
148 void var_set_leave (struct variable *, bool leave);
149 bool var_must_leave (const struct variable *);
152 size_t var_get_short_name_cnt (const struct variable *);
153 const char *var_get_short_name (const struct variable *, size_t idx);
154 void var_set_short_name (struct variable *, size_t, const char *);
155 void var_clear_short_names (struct variable *);
157 /* Relationship with dictionary. */
158 size_t var_get_dict_index (const struct variable *);
159 size_t var_get_case_index (const struct variable *);
161 /* Variable auxiliary data. */
162 void *var_get_aux (const struct variable *);
163 void *var_attach_aux (const struct variable *,
164 void *aux, void (*aux_dtor) (struct variable *));
165 void var_clear_aux (struct variable *);
166 void *var_detach_aux (struct variable *);
167 void var_dtor_free (struct variable *);
169 /* Custom attributes. */
170 struct attrset *var_get_attributes (const struct variable *);
171 void var_set_attributes (struct variable *, const struct attrset *);
172 bool var_has_attributes (const struct variable *);
175 const char *var_get_encoding (const struct variable *);
177 /* Function types. */
178 typedef bool var_predicate_func (const struct variable *);
180 #endif /* data/variable.h */