#include <stdlib.h>
-
#include "category.h"
#include "data-out.h"
#include "format.h"
#include "value-labels.h"
#include "vardict.h"
-#include <libpspp/alloc.h>
+#include <libpspp/misc.h>
#include <libpspp/assertion.h>
#include <libpspp/compiler.h>
#include <libpspp/hash.h>
#include <libpspp/message.h>
#include <libpspp/str.h>
+#include "xalloc.h"
+
#include "gettext.h"
#define _(msgid) gettext (msgid)
struct variable
{
/* Dictionary information. */
- char name[LONG_NAME_LEN + 1]; /* Variable name. Mixed case. */
+ char name[VAR_NAME_LEN + 1]; /* Variable name. Mixed case. */
int width; /* 0 for numeric, otherwise string width. */
struct missing_values miss; /* Missing values. */
struct fmt_spec print; /* Default format for PRINT. */
/* Data for use by containing dictionary. */
struct vardict_info vardict;
- /* Short name, used only for system and portable file input
- and output. Upper case only. Short names are not necessarily
- unique. Any variable may have no short name, indicated by an
- empty string. */
- char short_name[SHORT_NAME_LEN + 1];
+ /* Used only for system and portable file input and output.
+ See short-names.h. */
+ char **short_names;
+ size_t short_name_cnt;
/* Each command may use these fields as needed. */
void *aux;
have its values stored here. */
struct cat_vals *obs_vals;
};
-
-/* Returns true if VAR_TYPE is a valid variable type. */
-bool
-var_type_is_valid (enum var_type var_type)
-{
- return var_type == VAR_NUMERIC || var_type == VAR_STRING;
-}
-
-/* Returns the variable type for the given width. */
-enum var_type
-var_type_from_width (int width)
-{
- return width != 0 ? VAR_STRING : VAR_NUMERIC;
-}
\f
/* Creates and returns a new variable with the given NAME and
WIDTH and other fields initialized to default values. The
{
v->print = fmt_for_output (FMT_F, 8, 2);
v->alignment = ALIGN_RIGHT;
- v->display_width = 8;
v->measure = MEASURE_SCALE;
}
else
{
v->print = fmt_for_output (FMT_A, var_get_width (v), 0);
v->alignment = ALIGN_LEFT;
- v->display_width = 8;
v->measure = MEASURE_NOMINAL;
}
+ v->display_width = var_default_display_width (width);
v->write = v->print;
v->val_labs = NULL;
v->label = NULL;
- var_clear_short_name (v);
+ v->short_names = NULL;
+ v->short_name_cnt = 0;
v->aux = NULL;
v->aux_dtor = NULL;
v->obs_vals = NULL;
{
assert (!var_has_vardict (v));
cat_stored_values_destroy (v->obs_vals);
+ var_clear_short_names (v);
var_clear_aux (v);
val_labs_destroy (v->val_labs);
var_clear_label (v);
msg (SE, _("Variable name cannot be empty string."));
return false;
}
- else if (length > LONG_NAME_LEN)
+ else if (length > VAR_NAME_LEN)
{
if (issue_error)
msg (SE, _("Variable name %s exceeds %d-character limit."),
- name, (int) LONG_NAME_LEN);
+ name, (int) VAR_NAME_LEN);
return false;
}
return true;
}
+/* Returns VAR's dictionary class. */
+enum dict_class
+var_get_dict_class (const struct variable *var)
+{
+ return dict_class_from_id (var->name);
+}
+
/* A hsh_compare_func that orders variables A and B by their
names. */
int
}
\f
/* Returns the type of variable V. */
-enum var_type
+enum val_type
var_get_type (const struct variable *v)
{
- return var_type_from_width (v->width);
+ return val_type_from_width (v->width);
}
/* Returns the width of variable V. */
return v->width;
}
-/* Sets the width of V to WIDTH. */
+/* Changes the width of V to NEW_WIDTH.
+ This function should be used cautiously. */
void
var_set_width (struct variable *v, int new_width)
{
- enum var_type new_type = var_type_from_width (new_width);
+ const int old_width = v->width;
if (mv_is_resizable (&v->miss, new_width))
mv_resize (&v->miss, new_width);
}
}
- if (var_get_type (v) != new_type)
- {
- v->print = (new_type == VAR_NUMERIC
- ? fmt_for_output (FMT_F, 8, 2)
- : fmt_for_output (FMT_A, new_width, 0));
- v->write = v->print;
- }
- else if (new_type == VAR_STRING)
- {
- v->print.w = v->print.type == FMT_AHEX ? new_width * 2 : new_width;
- v->write.w = v->write.type == FMT_AHEX ? new_width * 2 : new_width;
- }
+ fmt_resize (&v->print, new_width);
+ fmt_resize (&v->write, new_width);
v->width = new_width;
+ {
+ const int old_val_count = value_cnt_from_width (old_width);
+ const int new_val_count = value_cnt_from_width (new_width);
+
+ if ( old_val_count != new_val_count)
+ dict_var_resized (v, new_val_count - old_val_count);
+ }
+
dict_var_changed (v);
}
bool
var_is_numeric (const struct variable *v)
{
- return var_get_type (v) == VAR_NUMERIC;
+ return var_get_type (v) == VAL_NUMERIC;
}
/* Returns true if variable V is a string variable, false
bool
var_is_alpha (const struct variable *v)
{
- return var_get_type (v) == VAR_STRING;
+ return var_get_type (v) == VAL_STRING;
}
/* Returns true if variable V is a short string variable, false
if (vls != NULL)
{
assert (val_labs_can_set_width (vls, v->width));
- v->val_labs = val_labs_copy (vls);
+ v->val_labs = val_labs_clone (vls);
val_labs_set_width (v->val_labs, v->width);
dict_var_changed (v);
}
/* Attempts to add a value label with the given VALUE and LABEL
to V. Returns true if successful, false if VALUE has an
- existing label.
- V must not be a long string variable. */
+ existing label or if V is a long string variable. */
bool
var_add_value_label (struct variable *v,
const union value *value, const char *label)
/* Adds or replaces a value label with the given VALUE and LABEL
to V.
- V must not be a long string variable. */
+ Has no effect if V is a long string variable. */
void
var_replace_value_label (struct variable *v,
const union value *value, const char *label)
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
+\f
/* Print and write formats. */
/* Returns V's print format specification. */
return v->display_width;
}
-
-
-
/* Sets V's display width to DISPLAY_WIDTH. */
void
var_set_display_width (struct variable *v, int display_width)
v->display_width = display_width;
dict_var_changed (v);
}
+
+/* Returns the default display width for a variable of the given
+ WIDTH, as set by var_create. The return value can be used to
+ reset a variable's display width to the default. */
+int
+var_default_display_width (int width)
+{
+ return width == 0 ? 8 : MIN (width, 32);
+}
\f
/* Returns true if A is a valid alignment,
false otherwise. */
case. */
/* Returns true if variable V's value should be left from case to
- case, instead of being reset to 0, system-missing, or blanks. */
+ case, instead of being reset to system-missing or blanks. */
bool
var_get_leave (const struct variable *v)
{
bool
var_must_leave (const struct variable *v)
{
- return dict_class_from_id (v->name) == DC_SCRATCH;
+ return var_get_dict_class (v) == DC_SCRATCH;
}
\f
-/* Returns V's short name, if it has one, or a null pointer
- otherwise.
+/* Returns the number of short names stored in VAR.
Short names are used only for system and portable file input
and output. They are upper-case only, not necessarily unique,
and limited to SHORT_NAME_LEN characters (plus a null
- terminator). Any variable may have no short name, indicated
- by returning a null pointer. */
+ terminator). Ordinarily a variable has at most one short
+ name, but very long string variables (longer than 255 bytes)
+ may have more. A variable might not have any short name at
+ all if it hasn't been saved to or read from a system or
+ portable file. */
+size_t
+var_get_short_name_cnt (const struct variable *var)
+{
+ return var->short_name_cnt;
+}
+
+/* Returns VAR's short name with the given IDX, if it has one
+ with that index, or a null pointer otherwise. Short names may
+ be sparse: even if IDX is less than the number of short names
+ in VAR, this function may return a null pointer. */
const char *
-var_get_short_name (const struct variable *v)
+var_get_short_name (const struct variable *var, size_t idx)
{
- return v->short_name[0] != '\0' ? v->short_name : NULL;
+ return idx < var->short_name_cnt ? var->short_names[idx] : NULL;
}
-/* Sets V's short_name to SHORT_NAME, truncating it to
- SHORT_NAME_LEN characters and converting it to uppercase in
- the process. Specifying a null pointer for SHORT_NAME clears
- the variable's short name. */
+/* Sets VAR's short name with the given IDX to SHORT_NAME,
+ truncating it to SHORT_NAME_LEN characters and converting it
+ to uppercase in the process. Specifying a null pointer for
+ SHORT_NAME clears the specified short name. */
void
-var_set_short_name (struct variable *v, const char *short_name)
+var_set_short_name (struct variable *var, size_t idx, const char *short_name)
{
- assert (v != NULL);
+ assert (var != NULL);
assert (short_name == NULL || var_is_plausible_name (short_name, false));
- if (short_name != NULL)
+ /* Clear old short name numbered IDX, if any. */
+ if (idx < var->short_name_cnt)
{
- str_copy_trunc (v->short_name, sizeof v->short_name, short_name);
- str_uppercase (v->short_name);
+ free (var->short_names[idx]);
+ var->short_names[idx] = NULL;
}
- else
- v->short_name[0] = '\0';
- dict_var_changed (v);
+
+ /* Install new short name for IDX. */
+ if (short_name != NULL)
+ {
+ if (idx >= var->short_name_cnt)
+ {
+ size_t old_cnt = var->short_name_cnt;
+ size_t i;
+ var->short_name_cnt = MAX (idx * 2, 1);
+ var->short_names = xnrealloc (var->short_names, var->short_name_cnt,
+ sizeof *var->short_names);
+ for (i = old_cnt; i < var->short_name_cnt; i++)
+ var->short_names[i] = NULL;
+ }
+ var->short_names[idx] = xstrndup (short_name, MAX_SHORT_STRING);
+ str_uppercase (var->short_names[idx]);
+ }
+
+ dict_var_changed (var);
}
-/* Clears V's short name. */
+/* Clears V's short names. */
void
-var_clear_short_name (struct variable *v)
+var_clear_short_names (struct variable *v)
{
- assert (v != NULL);
+ size_t i;
- v->short_name[0] = '\0';
+ for (i = 0; i < v->short_name_cnt; i++)
+ free (v->short_names[i]);
+ free (v->short_names);
+ v->short_names = NULL;
+ v->short_name_cnt = 0;
}
\f
/* Relationship with dictionary. */
return v->obs_vals;
}
-/* Sets V's observed categorical values to CAT_VALS. */
+/* Sets V's observed categorical values to CAT_VALS.
+ V becomes the owner of CAT_VALS. */
void
var_set_obs_vals (const struct variable *v_, struct cat_vals *cat_vals)
{
return v->obs_vals != NULL;
}
\f
-/* Returns the dictionary class corresponding to a variable named
- NAME. */
-enum dict_class
-dict_class_from_id (const char *name)
-{
- switch (name[0])
- {
- default:
- return DC_ORDINARY;
- case '$':
- return DC_SYSTEM;
- case '#':
- return DC_SCRATCH;
- }
-}
-
-/* Returns the name of dictionary class DICT_CLASS. */
-const char *
-dict_class_to_name (enum dict_class dict_class)
-{
- switch (dict_class)
- {
- case DC_ORDINARY:
- return _("ordinary");
- case DC_SYSTEM:
- return _("system");
- case DC_SCRATCH:
- return _("scratch");
- default:
- NOT_REACHED ();
- }
-}
-\f
/* Returns V's vardict structure. */
const struct vardict_info *
var_get_vardict (const struct variable *v)
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