#include <stdlib.h>
#include <ctype.h>
-#include "case.h"
-#include "category.h"
-#include "settings.h"
-#include "value-labels.h"
-#include "vardict.h"
-#include "variable.h"
-#include "vector.h"
+#include <data/attributes.h>
+#include <data/case.h>
+#include <data/category.h>
+#include <data/identifier.h>
+#include <data/settings.h>
+#include <data/value-labels.h>
+#include <data/vardict.h>
+#include <data/variable.h>
+#include <data/vector.h>
#include <libpspp/array.h>
+#include <libpspp/assertion.h>
#include <libpspp/compiler.h>
#include <libpspp/hash.h>
#include <libpspp/message.h>
#include <libpspp/pool.h>
#include <libpspp/str.h>
+#include "intprops.h"
#include "minmax.h"
#include "xalloc.h"
struct string documents; /* Documents, as a string. */
struct vector **vector; /* Vectors of variables. */
size_t vector_cnt; /* Number of vectors. */
+ struct attrset attributes; /* Custom attributes. */
const struct dict_callbacks *callbacks; /* Callbacks on dictionary
modification */
void *cb_data ; /* Data passed to callbacks */
d->name_tab = hsh_create (8, compare_vars_by_name, hash_var_by_name,
NULL, NULL);
+ attrset_init (&d->attributes);
return d;
}
for (i = 0; i < s->vector_cnt; i++)
d->vector[i] = vector_clone (s->vector[i], s, d);
+ dict_set_attributes (d, dict_get_attributes (s));
+
return d;
}
d->label = NULL;
ds_destroy (&d->documents);
dict_clear_vectors (d);
+ attrset_clear (&d->attributes);
}
/* Destroys the aux data for every variable in D, by calling
dict_clear (d);
hsh_destroy (d->name_tab);
+ attrset_destroy (&d->attributes);
free (d);
}
}
rename_var (d, v, new_name);
hsh_force_insert (d->name_tab, v);
- if (get_algorithm () == ENHANCED)
+ if (settings_get_algorithm () == ENHANCED)
var_clear_short_names (v);
if ( d->callbacks && d->callbacks->var_changed )
}
/* Clear short names. */
- if (get_algorithm () == ENHANCED)
+ if (settings_get_algorithm () == ENHANCED)
for (i = 0; i < count; i++)
var_clear_short_names (vars[i]);
return true;
}
+/* Returns true if a variable named NAME may be inserted in DICT;
+ that is, if there is not already a variable with that name in
+ DICT and if NAME is not a reserved word. (The caller's checks
+ have already verified that NAME is otherwise acceptable as a
+ variable name.) */
+static bool
+var_name_is_insertable (const struct dictionary *dict, const char *name)
+{
+ return (dict_lookup_var (dict, name) == NULL
+ && lex_id_to_token (ss_cstr (name)) == T_ID);
+}
+
+static bool
+make_hinted_name (const struct dictionary *dict, const char *hint,
+ char name[VAR_NAME_LEN + 1])
+{
+ bool dropped = false;
+ char *cp;
+
+ for (cp = name; *hint && cp < name + VAR_NAME_LEN; hint++)
+ {
+ if (cp == name
+ ? lex_is_id1 (*hint) && *hint != '$'
+ : lex_is_idn (*hint))
+ {
+ if (dropped)
+ {
+ *cp++ = '_';
+ dropped = false;
+ }
+ if (cp < name + VAR_NAME_LEN)
+ *cp++ = *hint;
+ }
+ else if (cp > name)
+ dropped = true;
+ }
+ *cp = '\0';
+
+ if (name[0] != '\0')
+ {
+ size_t len = strlen (name);
+ unsigned long int i;
+
+ if (var_name_is_insertable (dict, name))
+ return true;
+
+ for (i = 0; i < ULONG_MAX; i++)
+ {
+ char suffix[INT_BUFSIZE_BOUND (i) + 1];
+ int ofs;
+
+ suffix[0] = '_';
+ if (!str_format_26adic (i + 1, &suffix[1], sizeof suffix - 1))
+ NOT_REACHED ();
+
+ ofs = MIN (VAR_NAME_LEN - strlen (suffix), len);
+ strcpy (&name[ofs], suffix);
+
+ if (var_name_is_insertable (dict, name))
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool
+make_numeric_name (const struct dictionary *dict, unsigned long int *num_start,
+ char name[VAR_NAME_LEN + 1])
+{
+ unsigned long int number;
+
+ for (number = num_start != NULL ? MAX (*num_start, 1) : 1;
+ number < ULONG_MAX;
+ number++)
+ {
+ sprintf (name, "VAR%03lu", number);
+ if (dict_lookup_var (dict, name) == NULL)
+ {
+ if (num_start != NULL)
+ *num_start = number + 1;
+ return true;
+ }
+ }
+
+ if (num_start != NULL)
+ *num_start = ULONG_MAX;
+ return false;
+}
+
+
+/* Attempts to devise a variable name unique within DICT.
+ Returns true if successful, in which case the new variable
+ name is stored into NAME. Returns false if all names that can
+ be generated have already been taken. (Returning false is
+ quite unlikely: at least ULONG_MAX unique names can be
+ generated.)
+
+ HINT, if it is non-null, is used as a suggestion that will be
+ modified for suitability as a variable name and for
+ uniqueness.
+
+ If HINT is null or entirely unsuitable, a name in the form
+ "VAR%03d" will be generated, where the smallest unused integer
+ value is used. If NUM_START is non-null, then its value is
+ used as the minimum numeric value to check, and it is updated
+ to the next value to be checked.
+ */
+bool
+dict_make_unique_var_name (const struct dictionary *dict, const char *hint,
+ unsigned long int *num_start,
+ char name[VAR_NAME_LEN + 1])
+{
+ return ((hint != NULL && make_hinted_name (dict, hint, name))
+ || make_numeric_name (dict, num_start, name));
+}
+
/* Returns the weighting variable in dictionary D, or a null
pointer if the dictionary is unweighted. */
struct variable *
d->vector_cnt = 0;
}
+/* Returns D's attribute set. The caller may examine or modify
+ the attribute set, but must not destroy it. Destroying D or
+ calling dict_set_attributes for D will also destroy D's
+ attribute set. */
+struct attrset *
+dict_get_attributes (const struct dictionary *d)
+{
+ return (struct attrset *) &d->attributes;
+}
+
+/* Replaces D's attributes set by a copy of ATTRS. */
+void
+dict_set_attributes (struct dictionary *d, const struct attrset *attrs)
+{
+ attrset_destroy (&d->attributes);
+ attrset_clone (&d->attributes, attrs);
+}
+
+/* Returns true if D has at least one attribute in its attribute
+ set, false if D's attribute set is empty. */
+bool
+dict_has_attributes (const struct dictionary *d)
+{
+ return attrset_count (&d->attributes) > 0;
+}
+
/* Called from variable.c to notify the dictionary that some property of
the variable has changed */
void
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