/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
+ Copyright (C) 1997-9, 2000, 2006, 2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <stdlib.h>
-#include "category.h"
-#include "data-out.h"
-#include "format.h"
-#include "dictionary.h"
-#include "identifier.h"
-#include "missing-values.h"
-#include "value-labels.h"
-#include "vardict.h"
+#include <data/attributes.h>
+#include <data/category.h>
+#include <data/data-out.h>
+#include <data/format.h>
+#include <data/dictionary.h>
+#include <data/identifier.h>
+#include <data/missing-values.h>
+#include <data/value-labels.h>
+#include <data/vardict.h>
#include <libpspp/misc.h>
#include <libpspp/assertion.h>
vectors with binary entries, so any variable of type ALPHA will
have its values stored here. */
struct cat_vals *obs_vals;
+
+ /* Custom attributes. */
+ struct attrset attributes;
};
\f
/* Creates and returns a new variable with the given NAME and
var_create (const char *name, int width)
{
struct variable *v;
+ enum val_type type;
assert (width >= 0 && width <= MAX_STRING);
v->width = width;
mv_init (&v->miss, width);
v->leave = var_must_leave (v);
- if (var_is_numeric (v))
- {
- v->print = fmt_for_output (FMT_F, 8, 2);
- v->alignment = ALIGN_RIGHT;
- v->measure = MEASURE_SCALE;
- }
- else
- {
- v->print = fmt_for_output (FMT_A, var_get_width (v), 0);
- v->alignment = ALIGN_LEFT;
- v->measure = MEASURE_NOMINAL;
- }
+ type = val_type_from_width (width);
+ v->alignment = var_default_alignment (type);
+ v->measure = var_default_measure (type);
v->display_width = var_default_display_width (width);
- v->write = v->print;
+ v->print = v->write = var_default_formats (width);
v->val_labs = NULL;
v->label = NULL;
v->short_names = NULL;
v->aux = NULL;
v->aux_dtor = NULL;
v->obs_vals = NULL;
+ attrset_init (&v->attributes);
return v;
}
var_set_display_width (new_var, var_get_display_width (old_var));
var_set_alignment (new_var, var_get_alignment (old_var));
var_set_leave (new_var, var_get_leave (old_var));
+ var_set_attributes (new_var, var_get_attributes (old_var));
return new_var;
}
+/* Create a variable to be used for internal calculations only.
+ The variable is assigned a unique dictionary index and a case
+ index of CASE_IDX. */
+struct variable *
+var_create_internal (int case_idx)
+{
+ struct variable *v = var_create ("$internal", 0);
+ struct vardict_info vdi;
+ static int counter = INT_MAX / 2;
+
+ vdi.dict = NULL;
+ vdi.case_index = case_idx;
+ vdi.dict_index = counter++;
+ if (counter == INT_MAX)
+ counter = INT_MAX / 2;
+
+ var_set_vardict (v, &vdi);
+
+ return v;
+}
+
/* Destroys variable V.
V must not belong to a dictionary. If it does, use
dict_delete_var instead. */
{
if (v != NULL)
{
- assert (!var_has_vardict (v));
+ if (var_has_vardict (v))
+ {
+ const struct vardict_info *vdi = var_get_vardict (v);
+ assert (vdi->dict == NULL);
+ }
cat_stored_values_destroy (v->obs_vals);
var_clear_short_names (v);
var_clear_aux (v);
return strcasecmp (var_get_name (*a), var_get_name (*b));
}
+/* A hsh_compare_func that orders pointers to variables A and B
+ by their dictionary indexes. */
+int
+compare_var_ptrs_by_dict_index (const void *a_, const void *b_,
+ const void *aux UNUSED)
+{
+ struct variable *const *a = a_;
+ struct variable *const *b = b_;
+ size_t a_index = var_get_dict_index (*a);
+ size_t b_index = var_get_dict_index (*b);
+
+ return a_index < b_index ? -1 : a_index > b_index;
+}
+
/* A hsh_hash_func that hashes pointer to variable V based on its
name. */
unsigned
return val_labs_find (v->val_labs, *value);
}
-/* Get a string representing VALUE for variable V.
- That is, if VALUE has a label, return that label,
- otherwise format VALUE and return the formatted string. */
-const char *
-var_get_value_name (const struct variable *v, const union value *value)
+/* Append STR with a string representing VALUE for variable V.
+ That is, if VALUE has a label, append that label,
+ otherwise format VALUE and append the formatted string.
+ STR must be a pointer to an initialised struct string.
+*/
+void
+var_append_value_name (const struct variable *v, const union value *value,
+ struct string *str)
{
const char *name = var_lookup_value_label (v, value);
if (name == NULL)
{
- static char buf[MAX_STRING + 1];
- data_out (value, &v->print, buf);
- buf[v->print.w] = '\0';
- name = buf;
+ char *s = ds_put_uninit (str, v->print.w);
+ data_out (value, &v->print, s);
}
- return name;
+ else
+ ds_put_cstr (str, name);
}
\f
/* Print and write formats. */
}
/* Sets V's print format specification to PRINT, which must be a
- valid format specification for outputting a variable of V's
- width. */
+ valid format specification for a variable of V's width
+ (ordinarily an output format, but input formats are not
+ rejected). */
void
var_set_print_format (struct variable *v, const struct fmt_spec *print)
{
}
/* Sets V's write format specification to WRITE, which must be a
- valid format specification for outputting a variable of V's
- width. */
+ valid format specification for a variable of V's width
+ (ordinarily an output format, but input formats are not
+ rejected). */
void
var_set_write_format (struct variable *v, const struct fmt_spec *write)
{
}
/* Sets V's print and write format specifications to FORMAT,
- which must be a valid format specification for outputting a
- variable of V's width. */
+ which must be a valid format specification for a variable of
+ V's width (ordinarily an output format, but input formats are
+ not rejected). */
void
var_set_both_formats (struct variable *v, const struct fmt_spec *format)
{
var_set_print_format (v, format);
var_set_write_format (v, format);
}
+
+/* Returns the default print and write format for a variable of
+ the given TYPE, as set by var_create. The return value can be
+ used to reset a variable's print and write formats to the
+ default. */
+struct fmt_spec
+var_default_formats (int width)
+{
+ return (width == 0
+ ? fmt_for_output (FMT_F, 8, 2)
+ : fmt_for_output (FMT_A, width, 0));
+}
\f
/* Return a string representing this variable, in the form most
appropriate from a human factors perspective, that is, its
v->measure = measure;
dict_var_changed (v);
}
+
+/* Returns the default measurement level for a variable of the
+ given TYPE, as set by var_create. The return value can be
+ used to reset a variable's measurement level to the
+ default. */
+enum measure
+var_default_measure (enum val_type type)
+{
+ return type == VAL_NUMERIC ? MEASURE_SCALE : MEASURE_NOMINAL;
+}
\f
/* Returns V's display width, which applies only to GUIs. */
int
/* Sets V's display width to DISPLAY_WIDTH. */
void
-var_set_display_width (struct variable *v, int display_width)
+var_set_display_width (struct variable *v, int new_width)
{
- v->display_width = display_width;
+ int old_width = v->display_width;
+
+ v->display_width = new_width;
+
+ if ( old_width != new_width)
+ dict_var_display_width_changed (v);
+
dict_var_changed (v);
}
v->alignment = alignment;
dict_var_changed (v);
}
+
+/* Returns the default display alignment for a variable of the
+ given TYPE, as set by var_create. The return value can be
+ used to reset a variable's display alignment to the default. */
+enum alignment
+var_default_alignment (enum val_type type)
+{
+ return type == VAL_NUMERIC ? ALIGN_RIGHT : ALIGN_LEFT;
+}
\f
/* Whether variables' values should be preserved from case to
case. */
return v->obs_vals != NULL;
}
\f
+/* Returns variable V's attribute set. The caller may examine or
+ modify the attribute set, but must not destroy it. Destroying
+ V, or calling var_set_attributes() on V, will also destroy its
+ attribute set. */
+struct attrset *
+var_get_attributes (const struct variable *v)
+{
+ return (struct attrset *) &v->attributes;
+}
+
+/* Replaces variable V's attributes set by a copy of ATTRS. */
+void
+var_set_attributes (struct variable *v, const struct attrset *attrs)
+{
+ attrset_destroy (&v->attributes);
+ attrset_clone (&v->attributes, attrs);
+}
+
+/* Returns true if V has any custom attributes, false if it has none. */
+bool
+var_has_attributes (const struct variable *v)
+{
+ return attrset_count (&v->attributes) > 0;
+}
+\f
/* Returns V's vardict structure. */
const struct vardict_info *
var_get_vardict (const struct variable *v)
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