1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2006, 2009 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/attributes.h>
23 #include <data/data-out.h>
24 #include <data/format.h>
25 #include <data/dictionary.h>
26 #include <data/identifier.h>
27 #include <data/missing-values.h>
28 #include <data/value-labels.h>
29 #include <data/vardict.h>
31 #include <libpspp/misc.h>
32 #include <libpspp/assertion.h>
33 #include <libpspp/compiler.h>
34 #include <libpspp/hash.h>
35 #include <libpspp/message.h>
36 #include <libpspp/str.h>
42 #define _(msgid) gettext (msgid)
47 /* Dictionary information. */
48 char name[VAR_NAME_LEN + 1]; /* Variable name. Mixed case. */
49 int width; /* 0 for numeric, otherwise string width. */
50 struct missing_values miss; /* Missing values. */
51 struct fmt_spec print; /* Default format for PRINT. */
52 struct fmt_spec write; /* Default format for WRITE. */
53 struct val_labs *val_labs; /* Value labels. */
54 char *label; /* Variable label. */
56 /* GUI information. */
57 enum measure measure; /* Nominal, ordinal, or continuous. */
58 int display_width; /* Width of data editor column. */
59 enum alignment alignment; /* Alignment of data in GUI. */
61 /* Case information. */
62 bool leave; /* Leave value from case to case? */
64 /* Data for use by containing dictionary. */
65 struct vardict_info vardict;
67 /* Used only for system and portable file input and output.
70 size_t short_name_cnt;
72 /* Each command may use these fields as needed. */
74 void (*aux_dtor) (struct variable *);
76 /* Values of a categorical variable. Procedures need
77 vectors with binary entries, so any variable of type ALPHA will
78 have its values stored here. */
79 struct cat_vals *obs_vals;
81 /* Custom attributes. */
82 struct attrset attributes;
85 /* Creates and returns a new variable with the given NAME and
86 WIDTH and other fields initialized to default values. The
87 variable is not added to a dictionary; for that, use
88 dict_create_var instead. */
90 var_create (const char *name, int width)
95 assert (width >= 0 && width <= MAX_STRING);
97 v = xmalloc (sizeof *v);
98 v->vardict.dict_index = v->vardict.case_index = -1;
99 var_set_name (v, name);
101 mv_init (&v->miss, width);
102 v->leave = var_must_leave (v);
103 type = val_type_from_width (width);
104 v->alignment = var_default_alignment (type);
105 v->measure = var_default_measure (type);
106 v->display_width = var_default_display_width (width);
107 v->print = v->write = var_default_formats (width);
110 v->short_names = NULL;
111 v->short_name_cnt = 0;
115 attrset_init (&v->attributes);
120 /* Creates and returns a clone of OLD_VAR. Most properties of
121 the new variable are copied from OLD_VAR, except:
123 - The variable's short name is not copied, because there is
124 no reason to give a new variable with potentially a new
125 name the same short name.
127 - The new variable is not added to OLD_VAR's dictionary by
128 default. Use dict_clone_var, instead, to do that.
130 - Auxiliary data and obs_vals are not copied. */
132 var_clone (const struct variable *old_var)
134 struct variable *new_var = var_create (var_get_name (old_var),
135 var_get_width (old_var));
137 var_set_missing_values (new_var, var_get_missing_values (old_var));
138 var_set_print_format (new_var, var_get_print_format (old_var));
139 var_set_write_format (new_var, var_get_write_format (old_var));
140 var_set_value_labels (new_var, var_get_value_labels (old_var));
141 var_set_label (new_var, var_get_label (old_var));
142 var_set_measure (new_var, var_get_measure (old_var));
143 var_set_display_width (new_var, var_get_display_width (old_var));
144 var_set_alignment (new_var, var_get_alignment (old_var));
145 var_set_leave (new_var, var_get_leave (old_var));
146 var_set_attributes (new_var, var_get_attributes (old_var));
151 /* Create a variable of the specified WIDTH to be used for
152 internal calculations only. The variable is assigned a unique
153 dictionary index and a case index of CASE_IDX. */
155 var_create_internal (int case_idx, int width)
157 struct variable *v = var_create ("$internal", width);
158 struct vardict_info vdi;
159 static int counter = INT_MAX / 2;
162 vdi.case_index = case_idx;
163 vdi.dict_index = counter++;
164 if (counter == INT_MAX)
165 counter = INT_MAX / 2;
167 var_set_vardict (v, &vdi);
172 /* Destroys variable V.
173 V must not belong to a dictionary. If it does, use
174 dict_delete_var instead. */
176 var_destroy (struct variable *v)
180 if (var_has_vardict (v))
182 const struct vardict_info *vdi = var_get_vardict (v);
183 assert (vdi->dict == NULL);
185 mv_destroy (&v->miss);
186 cat_stored_values_destroy (v->obs_vals);
187 var_clear_short_names (v);
189 val_labs_destroy (v->val_labs);
195 /* Variable names. */
197 /* Return variable V's name. */
199 var_get_name (const struct variable *v)
204 /* Sets V's name to NAME.
205 Do not use this function for a variable in a dictionary. Use
206 dict_rename_var instead. */
208 var_set_name (struct variable *v, const char *name)
210 assert (v->vardict.dict_index == -1);
211 assert (var_is_plausible_name (name, false));
213 str_copy_trunc (v->name, sizeof v->name, name);
214 dict_var_changed (v);
217 /* Returns true if NAME is an acceptable name for a variable,
218 false otherwise. If ISSUE_ERROR is true, issues an
219 explanatory error message on failure. */
221 var_is_valid_name (const char *name, bool issue_error)
226 assert (name != NULL);
228 /* Note that strlen returns number of BYTES, not the number of
230 length = strlen (name);
232 plausible = var_is_plausible_name(name, issue_error);
238 if (!lex_is_id1 (name[0]))
241 msg (SE, _("Character `%c' (in %s) may not appear "
242 "as the first character in a variable name."),
248 for (i = 0; i < length; i++)
250 if (!lex_is_idn (name[i]))
253 msg (SE, _("Character `%c' (in %s) may not appear in "
263 /* Returns true if NAME is an plausible name for a variable,
264 false otherwise. If ISSUE_ERROR is true, issues an
265 explanatory error message on failure.
266 This function makes no use of LC_CTYPE.
269 var_is_plausible_name (const char *name, bool issue_error)
273 assert (name != NULL);
275 /* Note that strlen returns number of BYTES, not the number of
277 length = strlen (name);
281 msg (SE, _("Variable name cannot be empty string."));
284 else if (length > VAR_NAME_LEN)
287 msg (SE, _("Variable name %s exceeds %d-character limit."),
288 name, (int) VAR_NAME_LEN);
292 if (lex_id_to_token (ss_cstr (name)) != T_ID)
295 msg (SE, _("`%s' may not be used as a variable name because it "
296 "is a reserved word."), name);
303 /* Returns VAR's dictionary class. */
305 var_get_dict_class (const struct variable *var)
307 return dict_class_from_id (var->name);
310 /* A hsh_compare_func that orders variables A and B by their
313 compare_vars_by_name (const void *a_, const void *b_, const void *aux UNUSED)
315 const struct variable *a = a_;
316 const struct variable *b = b_;
318 return strcasecmp (a->name, b->name);
321 /* A hsh_hash_func that hashes variable V based on its name. */
323 hash_var_by_name (const void *v_, const void *aux UNUSED)
325 const struct variable *v = v_;
327 return hash_case_string (v->name, 0);
330 /* A hsh_compare_func that orders pointers to variables A and B
333 compare_var_ptrs_by_name (const void *a_, const void *b_,
334 const void *aux UNUSED)
336 struct variable *const *a = a_;
337 struct variable *const *b = b_;
339 return strcasecmp (var_get_name (*a), var_get_name (*b));
342 /* A hsh_compare_func that orders pointers to variables A and B
343 by their dictionary indexes. */
345 compare_var_ptrs_by_dict_index (const void *a_, const void *b_,
346 const void *aux UNUSED)
348 struct variable *const *a = a_;
349 struct variable *const *b = b_;
350 size_t a_index = var_get_dict_index (*a);
351 size_t b_index = var_get_dict_index (*b);
353 return a_index < b_index ? -1 : a_index > b_index;
356 /* A hsh_hash_func that hashes pointer to variable V based on its
359 hash_var_ptr_by_name (const void *v_, const void *aux UNUSED)
361 struct variable *const *v = v_;
363 return hash_case_string (var_get_name (*v), 0);
366 /* Returns the type of variable V. */
368 var_get_type (const struct variable *v)
370 return val_type_from_width (v->width);
373 /* Returns the width of variable V. */
375 var_get_width (const struct variable *v)
380 /* Changes the width of V to NEW_WIDTH.
381 This function should be used cautiously. */
383 var_set_width (struct variable *v, int new_width)
385 const int old_width = v->width;
387 if (old_width == new_width)
390 if (mv_is_resizable (&v->miss, new_width))
391 mv_resize (&v->miss, new_width);
394 mv_destroy (&v->miss);
395 mv_init (&v->miss, new_width);
398 if (v->val_labs != NULL)
400 if (val_labs_can_set_width (v->val_labs, new_width))
401 val_labs_set_width (v->val_labs, new_width);
404 val_labs_destroy (v->val_labs);
409 fmt_resize (&v->print, new_width);
410 fmt_resize (&v->write, new_width);
412 v->width = new_width;
413 dict_var_resized (v, old_width);
414 dict_var_changed (v);
417 /* Returns true if variable V is numeric, false otherwise. */
419 var_is_numeric (const struct variable *v)
421 return var_get_type (v) == VAL_NUMERIC;
424 /* Returns true if variable V is a string variable, false
427 var_is_alpha (const struct variable *v)
429 return var_get_type (v) == VAL_STRING;
432 /* Returns variable V's missing values. */
433 const struct missing_values *
434 var_get_missing_values (const struct variable *v)
439 /* Sets variable V's missing values to MISS, which must be of V's
440 width or at least resizable to V's width.
441 If MISS is null, then V's missing values, if any, are
444 var_set_missing_values (struct variable *v, const struct missing_values *miss)
448 assert (mv_is_resizable (miss, v->width));
449 mv_destroy (&v->miss);
450 mv_copy (&v->miss, miss);
451 mv_resize (&v->miss, v->width);
456 dict_var_changed (v);
459 /* Sets variable V to have no user-missing values. */
461 var_clear_missing_values (struct variable *v)
463 var_set_missing_values (v, NULL);
466 /* Returns true if V has any user-missing values,
469 var_has_missing_values (const struct variable *v)
471 return !mv_is_empty (&v->miss);
474 /* Returns true if VALUE is in the given CLASS of missing values
475 in V, false otherwise. */
477 var_is_value_missing (const struct variable *v, const union value *value,
480 return mv_is_value_missing (&v->miss, value, class);
483 /* Returns true if D is in the given CLASS of missing values in
485 V must be a numeric variable. */
487 var_is_num_missing (const struct variable *v, double d, enum mv_class class)
489 return mv_is_num_missing (&v->miss, d, class);
492 /* Returns true if S[] is a missing value for V, false otherwise.
493 S[] must contain exactly as many characters as V's width.
494 V must be a string variable. */
496 var_is_str_missing (const struct variable *v, const uint8_t s[],
499 return mv_is_str_missing (&v->miss, s, class);
502 /* Returns variable V's value labels,
503 possibly a null pointer if it has none. */
504 const struct val_labs *
505 var_get_value_labels (const struct variable *v)
510 /* Returns true if variable V has at least one value label. */
512 var_has_value_labels (const struct variable *v)
514 return val_labs_count (v->val_labs) > 0;
517 /* Sets variable V's value labels to a copy of VLS,
518 which must have a width equal to V's width or one that can be
519 changed to V's width.
520 If VLS is null, then V's value labels, if any, are removed. */
522 var_set_value_labels (struct variable *v, const struct val_labs *vls)
524 val_labs_destroy (v->val_labs);
529 assert (val_labs_can_set_width (vls, v->width));
530 v->val_labs = val_labs_clone (vls);
531 val_labs_set_width (v->val_labs, v->width);
532 dict_var_changed (v);
536 /* Makes sure that V has a set of value labels,
537 by assigning one to it if necessary. */
539 alloc_value_labels (struct variable *v)
541 if (v->val_labs == NULL)
542 v->val_labs = val_labs_create (v->width);
545 /* Attempts to add a value label with the given VALUE and LABEL
546 to V. Returns true if successful, false if VALUE has an
547 existing label or if V is a long string variable. */
549 var_add_value_label (struct variable *v,
550 const union value *value, const char *label)
552 alloc_value_labels (v);
553 return val_labs_add (v->val_labs, value, label);
556 /* Adds or replaces a value label with the given VALUE and LABEL
558 Has no effect if V is a long string variable. */
560 var_replace_value_label (struct variable *v,
561 const union value *value, const char *label)
563 alloc_value_labels (v);
564 val_labs_replace (v->val_labs, value, label);
567 /* Removes V's value labels, if any. */
569 var_clear_value_labels (struct variable *v)
571 var_set_value_labels (v, NULL);
574 /* Returns the label associated with VALUE for variable V,
575 or a null pointer if none. */
577 var_lookup_value_label (const struct variable *v, const union value *value)
579 return val_labs_find (v->val_labs, value);
582 /* Append STR with a string representing VALUE for variable V.
583 That is, if VALUE has a label, append that label,
584 otherwise format VALUE and append the formatted string.
585 STR must be a pointer to an initialised struct string.
588 var_append_value_name (const struct variable *v, const union value *value,
591 const char *name = var_lookup_value_label (v, value);
592 const struct dictionary *dict = var_get_vardict (v)->dict;
595 char *s = data_out (value, dict_get_encoding (dict), &v->print);
596 ds_put_cstr (str, s);
600 ds_put_cstr (str, name);
603 /* Print and write formats. */
605 /* Returns V's print format specification. */
606 const struct fmt_spec *
607 var_get_print_format (const struct variable *v)
612 /* Sets V's print format specification to PRINT, which must be a
613 valid format specification for a variable of V's width
614 (ordinarily an output format, but input formats are not
617 var_set_print_format (struct variable *v, const struct fmt_spec *print)
619 assert (fmt_check_width_compat (print, v->width));
621 dict_var_changed (v);
624 /* Returns V's write format specification. */
625 const struct fmt_spec *
626 var_get_write_format (const struct variable *v)
631 /* Sets V's write format specification to WRITE, which must be a
632 valid format specification for a variable of V's width
633 (ordinarily an output format, but input formats are not
636 var_set_write_format (struct variable *v, const struct fmt_spec *write)
638 assert (fmt_check_width_compat (write, v->width));
640 dict_var_changed (v);
643 /* Sets V's print and write format specifications to FORMAT,
644 which must be a valid format specification for a variable of
645 V's width (ordinarily an output format, but input formats are
648 var_set_both_formats (struct variable *v, const struct fmt_spec *format)
650 var_set_print_format (v, format);
651 var_set_write_format (v, format);
654 /* Returns the default print and write format for a variable of
655 the given TYPE, as set by var_create. The return value can be
656 used to reset a variable's print and write formats to the
659 var_default_formats (int width)
662 ? fmt_for_output (FMT_F, 8, 2)
663 : fmt_for_output (FMT_A, width, 0));
666 /* Return a string representing this variable, in the form most
667 appropriate from a human factors perspective, that is, its
668 variable label if it has one, otherwise its name. */
670 var_to_string (const struct variable *v)
672 return v->label != NULL ? v->label : v->name;
675 /* Returns V's variable label, or a null pointer if it has none. */
677 var_get_label (const struct variable *v)
682 /* Sets V's variable label to LABEL, stripping off leading and
683 trailing white space and truncating to 255 characters.
684 If LABEL is a null pointer or if LABEL is an empty string
685 (after stripping white space), then V's variable label (if
688 var_set_label (struct variable *v, const char *label)
695 struct substring s = ss_cstr (label);
696 ss_trim (&s, ss_cstr (CC_SPACES));
697 ss_truncate (&s, 255);
698 if (!ss_is_empty (s))
699 v->label = ss_xstrdup (s);
701 dict_var_changed (v);
704 /* Removes any variable label from V. */
706 var_clear_label (struct variable *v)
708 var_set_label (v, NULL);
711 /* Returns true if V has a variable V,
714 var_has_label (const struct variable *v)
716 return v->label != NULL;
719 /* Returns true if M is a valid variable measurement level,
722 measure_is_valid (enum measure m)
724 return m == MEASURE_NOMINAL || m == MEASURE_ORDINAL || m == MEASURE_SCALE;
727 /* Returns V's measurement level. */
729 var_get_measure (const struct variable *v)
734 /* Sets V's measurement level to MEASURE. */
736 var_set_measure (struct variable *v, enum measure measure)
738 assert (measure_is_valid (measure));
739 v->measure = measure;
740 dict_var_changed (v);
743 /* Returns the default measurement level for a variable of the
744 given TYPE, as set by var_create. The return value can be
745 used to reset a variable's measurement level to the
748 var_default_measure (enum val_type type)
750 return type == VAL_NUMERIC ? MEASURE_SCALE : MEASURE_NOMINAL;
753 /* Returns V's display width, which applies only to GUIs. */
755 var_get_display_width (const struct variable *v)
757 return v->display_width;
760 /* Sets V's display width to DISPLAY_WIDTH. */
762 var_set_display_width (struct variable *v, int new_width)
764 int old_width = v->display_width;
766 v->display_width = new_width;
768 if ( old_width != new_width)
769 dict_var_display_width_changed (v);
771 dict_var_changed (v);
774 /* Returns the default display width for a variable of the given
775 WIDTH, as set by var_create. The return value can be used to
776 reset a variable's display width to the default. */
778 var_default_display_width (int width)
780 return width == 0 ? 8 : MIN (width, 32);
783 /* Returns true if A is a valid alignment,
786 alignment_is_valid (enum alignment a)
788 return a == ALIGN_LEFT || a == ALIGN_RIGHT || a == ALIGN_CENTRE;
791 /* Returns V's display alignment, which applies only to GUIs. */
793 var_get_alignment (const struct variable *v)
798 /* Sets V's display alignment to ALIGNMENT. */
800 var_set_alignment (struct variable *v, enum alignment alignment)
802 assert (alignment_is_valid (alignment));
803 v->alignment = alignment;
804 dict_var_changed (v);
807 /* Returns the default display alignment for a variable of the
808 given TYPE, as set by var_create. The return value can be
809 used to reset a variable's display alignment to the default. */
811 var_default_alignment (enum val_type type)
813 return type == VAL_NUMERIC ? ALIGN_RIGHT : ALIGN_LEFT;
816 /* Whether variables' values should be preserved from case to
819 /* Returns true if variable V's value should be left from case to
820 case, instead of being reset to system-missing or blanks. */
822 var_get_leave (const struct variable *v)
827 /* Sets V's leave setting to LEAVE. */
829 var_set_leave (struct variable *v, bool leave)
831 assert (leave || !var_must_leave (v));
833 dict_var_changed (v);
836 /* Returns true if V must be left from case to case,
837 false if it can be set either way. */
839 var_must_leave (const struct variable *v)
841 return var_get_dict_class (v) == DC_SCRATCH;
844 /* Returns the number of short names stored in VAR.
846 Short names are used only for system and portable file input
847 and output. They are upper-case only, not necessarily unique,
848 and limited to SHORT_NAME_LEN characters (plus a null
849 terminator). Ordinarily a variable has at most one short
850 name, but very long string variables (longer than 255 bytes)
851 may have more. A variable might not have any short name at
852 all if it hasn't been saved to or read from a system or
855 var_get_short_name_cnt (const struct variable *var)
857 return var->short_name_cnt;
860 /* Returns VAR's short name with the given IDX, if it has one
861 with that index, or a null pointer otherwise. Short names may
862 be sparse: even if IDX is less than the number of short names
863 in VAR, this function may return a null pointer. */
865 var_get_short_name (const struct variable *var, size_t idx)
867 return idx < var->short_name_cnt ? var->short_names[idx] : NULL;
870 /* Sets VAR's short name with the given IDX to SHORT_NAME,
871 truncating it to SHORT_NAME_LEN characters and converting it
872 to uppercase in the process. Specifying a null pointer for
873 SHORT_NAME clears the specified short name. */
875 var_set_short_name (struct variable *var, size_t idx, const char *short_name)
877 assert (var != NULL);
878 assert (short_name == NULL || var_is_plausible_name (short_name, false));
880 /* Clear old short name numbered IDX, if any. */
881 if (idx < var->short_name_cnt)
883 free (var->short_names[idx]);
884 var->short_names[idx] = NULL;
887 /* Install new short name for IDX. */
888 if (short_name != NULL)
890 if (idx >= var->short_name_cnt)
892 size_t old_cnt = var->short_name_cnt;
894 var->short_name_cnt = MAX (idx * 2, 1);
895 var->short_names = xnrealloc (var->short_names, var->short_name_cnt,
896 sizeof *var->short_names);
897 for (i = old_cnt; i < var->short_name_cnt; i++)
898 var->short_names[i] = NULL;
900 var->short_names[idx] = xstrndup (short_name, MAX_SHORT_STRING);
901 str_uppercase (var->short_names[idx]);
904 dict_var_changed (var);
907 /* Clears V's short names. */
909 var_clear_short_names (struct variable *v)
913 for (i = 0; i < v->short_name_cnt; i++)
914 free (v->short_names[i]);
915 free (v->short_names);
916 v->short_names = NULL;
917 v->short_name_cnt = 0;
920 /* Relationship with dictionary. */
922 /* Returns V's index within its dictionary, the value
923 for which "dict_get_var (dict, index)" will return V.
924 V must be in a dictionary. */
926 var_get_dict_index (const struct variable *v)
928 assert (v->vardict.dict_index != -1);
929 return v->vardict.dict_index;
932 /* Returns V's index within the case represented by its
933 dictionary, that is, the value for which "case_data_idx (case,
934 index)" will return the data for V in that case.
935 V must be in a dictionary. */
937 var_get_case_index (const struct variable *v)
939 assert (v->vardict.case_index != -1);
940 return v->vardict.case_index;
943 /* Returns V's auxiliary data, or a null pointer if none has been
946 var_get_aux (const struct variable *v)
951 /* Assign auxiliary data AUX to variable V, which must not
952 already have auxiliary data. Before V's auxiliary data is
953 cleared, AUX_DTOR(V) will be called. (var_dtor_free, below,
954 may be appropriate for use as AUX_DTOR.) */
956 var_attach_aux (const struct variable *v_,
957 void *aux, void (*aux_dtor) (struct variable *))
959 struct variable *v = (struct variable *) v_ ; /* cast away const */
960 assert (v->aux == NULL);
961 assert (aux != NULL);
963 v->aux_dtor = aux_dtor;
967 /* Remove auxiliary data, if any, from V, and return it, without
968 calling any associated destructor. */
970 var_detach_aux (struct variable *v)
973 assert (aux != NULL);
978 /* Clears auxiliary data, if any, from V, and calls any
979 associated destructor. */
981 var_clear_aux (struct variable *v)
986 if (v->aux_dtor != NULL)
992 /* This function is appropriate for use an auxiliary data
993 destructor (passed as AUX_DTOR to var_attach_aux()) for the
994 case where the auxiliary data should be passed to free(). */
996 var_dtor_free (struct variable *v)
1001 /* Observed categorical values. */
1003 /* Returns V's observed categorical values,
1004 which V must have. */
1006 var_get_obs_vals (const struct variable *v)
1008 assert (v->obs_vals != NULL);
1012 /* Sets V's observed categorical values to CAT_VALS.
1013 V becomes the owner of CAT_VALS. */
1015 var_set_obs_vals (const struct variable *v_, struct cat_vals *cat_vals)
1017 struct variable *v = (struct variable *) v_ ; /* cast away const */
1018 cat_stored_values_destroy (v->obs_vals);
1019 v->obs_vals = cat_vals;
1022 /* Returns true if V has observed categorical values,
1025 var_has_obs_vals (const struct variable *v)
1027 return v->obs_vals != NULL;
1030 /* Returns variable V's attribute set. The caller may examine or
1031 modify the attribute set, but must not destroy it. Destroying
1032 V, or calling var_set_attributes() on V, will also destroy its
1035 var_get_attributes (const struct variable *v)
1037 return (struct attrset *) &v->attributes;
1040 /* Replaces variable V's attributes set by a copy of ATTRS. */
1042 var_set_attributes (struct variable *v, const struct attrset *attrs)
1044 attrset_destroy (&v->attributes);
1045 attrset_clone (&v->attributes, attrs);
1048 /* Returns true if V has any custom attributes, false if it has none. */
1050 var_has_attributes (const struct variable *v)
1052 return attrset_count (&v->attributes) > 0;
1055 /* Returns V's vardict structure. */
1056 const struct vardict_info *
1057 var_get_vardict (const struct variable *v)
1059 assert (var_has_vardict (v));
1063 /* Sets V's vardict data to VARDICT. */
1065 var_set_vardict (struct variable *v, const struct vardict_info *vardict)
1067 assert (vardict->dict_index >= 0);
1068 assert (vardict->case_index >= 0);
1069 v->vardict = *vardict;
1072 /* Returns true if V has vardict data. */
1074 var_has_vardict (const struct variable *v)
1076 return v->vardict.dict_index != -1;
1079 /* Clears V's vardict data. */
1081 var_clear_vardict (struct variable *v)
1083 v->vardict.dict_index = v->vardict.case_index = -1;