X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fvariable.c;fp=src%2Fdata%2Fvariable.c;h=9968d9f9fb4e6067219dd9f7ccef2cc15518b0d7;hb=f550aee00a62fe1d8baf62d83cd7efef6cc2ee92;hp=5ebd6e41231186701f0ea933867f8a0ecd085aa9;hpb=56c42d61d46aea9d13dcf55e9e2252805282570b;p=pspp

diff --git a/src/data/variable.c b/src/data/variable.c
index 5ebd6e4123..9968d9f9fb 100644
--- a/src/data/variable.c
+++ b/src/data/variable.c
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 1997-9, 2000, 2006, 2009 Free Software Foundation, Inc.
+   Copyright (C) 1997-9, 2000, 2006, 2009, 2010 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
@@ -62,7 +62,7 @@ struct variable
     bool leave;                 /* Leave value from case to case? */
 
     /* Data for use by containing dictionary. */
-    struct vardict_info vardict;
+    struct vardict_info *vardict;
 
     /* Used only for system and portable file input and output.
        See short-names.h. */
@@ -73,11 +73,6 @@ struct variable
     void *aux;
     void (*aux_dtor) (struct variable *);
 
-    /* Values of a categorical variable.  Procedures need
-       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;
   };
@@ -95,7 +90,7 @@ var_create (const char *name, int width)
   assert (width >= 0 && width <= MAX_STRING);
 
   v = xmalloc (sizeof *v);
-  v->vardict.dict_index = v->vardict.case_index = -1;
+  v->vardict = NULL;
   var_set_name (v, name);
   v->width = width;
   mv_init (&v->miss, width);
@@ -111,7 +106,6 @@ var_create (const char *name, int width)
   v->short_name_cnt = 0;
   v->aux = NULL;
   v->aux_dtor = NULL;
-  v->obs_vals = NULL;
   attrset_init (&v->attributes);
 
   return v;
@@ -126,8 +120,7 @@ var_create (const char *name, int width)
 
     - The new variable is not added to OLD_VAR's dictionary by
       default.  Use dict_clone_var, instead, to do that.
-
-    - Auxiliary data and obs_vals are not copied. */
+*/
 struct variable *
 var_clone (const struct variable *old_var)
 {
@@ -148,27 +141,6 @@ var_clone (const struct variable *old_var)
   return new_var;
 }
 
-/* Create a variable of the specified WIDTH 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, int width)
-{
-  struct variable *v = var_create ("$internal", width);
-  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. */
@@ -177,13 +149,8 @@ var_destroy (struct variable *v)
 {
   if (v != NULL)
     {
-      if (var_has_vardict (v))
-	{
-	  const struct vardict_info *vdi = var_get_vardict (v);
-	  assert (vdi->dict == NULL);
-	}
+      assert (!var_has_vardict (v));
       mv_destroy (&v->miss);
-      cat_stored_values_destroy (v->obs_vals);
       var_clear_short_names (v);
       var_clear_aux (v);
       val_labs_destroy (v->val_labs);
@@ -207,7 +174,7 @@ var_get_name (const struct variable *v)
 void
 var_set_name (struct variable *v, const char *name)
 {
-  assert (v->vardict.dict_index == -1);
+  assert (!var_has_vardict (v));
   assert (var_is_plausible_name (name, false));
 
   str_copy_trunc (v->name, sizeof v->name, name);
@@ -223,8 +190,6 @@ var_is_valid_name (const char *name, bool issue_error)
   bool plausible;
   size_t length, i;
 
-  assert (name != NULL);
-
   /* Note that strlen returns number of BYTES, not the number of
      CHARACTERS */
   length = strlen (name);
@@ -270,8 +235,6 @@ var_is_plausible_name (const char *name, bool issue_error)
 {
   size_t length;
 
-  assert (name != NULL);
-
   /* Note that strlen returns number of BYTES, not the number of
      CHARACTERS */
   length = strlen (name);
@@ -589,10 +552,9 @@ var_append_value_name (const struct variable *v, const union value *value,
 		       struct string *str)
 {
   const char *name = var_lookup_value_label (v, value);
-  const struct dictionary *dict = var_get_vardict (v)->dict;
   if (name == NULL)
     {
-      char *s = data_out (value, dict_get_encoding (dict), &v->print);
+      char *s = data_out (value, var_get_encoding (v), &v->print);
       ds_put_cstr (str, s);
       free (s);
     }
@@ -874,7 +836,6 @@ var_get_short_name (const struct variable *var, size_t idx)
 void
 var_set_short_name (struct variable *var, size_t idx, const char *short_name)
 {
-  assert (var != NULL);
   assert (short_name == NULL || var_is_plausible_name (short_name, false));
 
   /* Clear old short name numbered IDX, if any. */
@@ -925,8 +886,8 @@ var_clear_short_names (struct variable *v)
 size_t
 var_get_dict_index (const struct variable *v)
 {
-  assert (v->vardict.dict_index != -1);
-  return v->vardict.dict_index;
+  assert (var_has_vardict (v));
+  return vardict_get_dict_index (v->vardict);
 }
 
 /* Returns V's index within the case represented by its
@@ -936,8 +897,8 @@ var_get_dict_index (const struct variable *v)
 size_t
 var_get_case_index (const struct variable *v)
 {
-  assert (v->vardict.case_index != -1);
-  return v->vardict.case_index;
+  assert (var_has_vardict (v));
+  return vardict_get_case_index (v->vardict);
 }
 
 /* Returns V's auxiliary data, or a null pointer if none has been
@@ -956,7 +917,7 @@ void *
 var_attach_aux (const struct variable *v_,
                 void *aux, void (*aux_dtor) (struct variable *))
 {
-  struct variable *v = (struct variable *) v_ ; /* cast away const  */
+  struct variable *v = CONST_CAST (struct variable *, v_);
   assert (v->aux == NULL);
   assert (aux != NULL);
   v->aux = aux;
@@ -980,7 +941,6 @@ var_detach_aux (struct variable *v)
 void
 var_clear_aux (struct variable *v)
 {
-  assert (v != NULL);
   if (v->aux != NULL)
     {
       if (v->aux_dtor != NULL)
@@ -998,35 +958,6 @@ var_dtor_free (struct variable *v)
   free (v->aux);
 }
 
-/* Observed categorical values. */
-
-/* Returns V's observed categorical values,
-   which V must have. */
-struct cat_vals *
-var_get_obs_vals (const struct variable *v)
-{
-  assert (v->obs_vals != NULL);
-  return v->obs_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)
-{
-  struct variable *v = (struct variable *) v_ ; /* cast away const */
-  cat_stored_values_destroy (v->obs_vals);
-  v->obs_vals = cat_vals;
-}
-
-/* Returns true if V has observed categorical values,
-   false otherwise. */
-bool
-var_has_obs_vals (const struct variable *v)
-{
-  return v->obs_vals != NULL;
-}
-
 /* 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
@@ -1034,7 +965,7 @@ var_has_obs_vals (const struct variable *v)
 struct attrset *
 var_get_attributes (const struct variable *v) 
 {
-  return (struct attrset *) &v->attributes;
+  return CONST_CAST (struct attrset *, &v->attributes);
 }
 
 /* Replaces variable V's attributes set by a copy of ATTRS. */
@@ -1052,33 +983,41 @@ var_has_attributes (const struct variable *v)
   return attrset_count (&v->attributes) > 0;
 }
 
+/* Returns the encoding of values of variable VAR.  (This is actually a
+   property of the dictionary.)  Returns null if no specific encoding has been
+   set.  */
+const char *
+var_get_encoding (const struct variable *var)
+{
+  return (var_has_vardict (var)
+          ? dict_get_encoding (vardict_get_dictionary (var->vardict))
+          : NULL);
+}
+
 /* Returns V's vardict structure. */
-const struct vardict_info *
+struct vardict_info *
 var_get_vardict (const struct variable *v)
 {
-  assert (var_has_vardict (v));
-  return &v->vardict;
+  return CONST_CAST (struct vardict_info *, v->vardict);
 }
 
 /* Sets V's vardict data to VARDICT. */
 void
-var_set_vardict (struct variable *v, const struct vardict_info *vardict)
+var_set_vardict (struct variable *v, struct vardict_info *vardict)
 {
-  assert (vardict->dict_index >= 0);
-  assert (vardict->case_index >= 0);
-  v->vardict = *vardict;
+  v->vardict = vardict;
 }
 
 /* Returns true if V has vardict data. */
 bool
 var_has_vardict (const struct variable *v)
 {
-  return v->vardict.dict_index != -1;
+  return v->vardict != NULL;
 }
 
 /* Clears V's vardict data. */
 void
 var_clear_vardict (struct variable *v)
 {
-  v->vardict.dict_index = v->vardict.case_index = -1;
+  v->vardict = NULL;
 }