X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fprocedure.c;h=2154f689c8f50d7a3370d8d99a935f2056590897;hb=ecd26ec19e9f8a58079a1c5fa06b39484787ab7e;hp=29dffbcaf8303dd9daf607d19eec7cfd76a1590a;hpb=9cb85c5eb1b0e041f4b7b7f1c5ab9cce55de524f;p=pspp-builds.git

diff --git a/src/data/procedure.c b/src/data/procedure.c
index 29dffbca..2154f689 100644
--- a/src/data/procedure.c
+++ b/src/data/procedure.c
@@ -43,6 +43,13 @@ struct dataset {
   /* An abstract factory which creates casefiles */
   struct casefile_factory *cf_factory;
 
+  /* Callback which occurs when a procedure provides a new source for
+     the dataset */
+  replace_source_callback *replace_source ;
+
+  /* Callback which occurs whenever the DICT is replaced by a new one */
+  replace_dictionary_callback *replace_dict;
+
   /* Cases are read from proc_source,
      pass through permanent_trns_chain (which transforms them into
      the format described by permanent_dict),
@@ -120,10 +127,10 @@ time_of_last_procedure (struct dataset *ds)
       start the next case from step 1.
 
    2. Write case to replacement active file.
-   
+  
    3. Execute temporary transformations.  If these drop the case,
       start the next case from step 1.
-      
+     
    4. Pass case to PROC_FUNC, passing AUX as auxiliary data.
 
    Returns true if successful, false if an I/O error occurred. */
@@ -152,17 +159,17 @@ procedure (struct dataset *ds, case_func *cf, void *aux)
 
 /* Multipass procedure. */
 
-struct multipass_aux_data 
+struct multipass_aux_data
   {
     struct casefile *casefile;
-    
+   
     bool (*proc_func) (const struct casefile *, void *aux);
     void *aux;
   };
 
 /* Case processing function for multipass_procedure(). */
 static bool
-multipass_case_func (const struct ccase *c, void *aux_data_, const struct dataset *ds UNUSED) 
+multipass_case_func (const struct ccase *c, void *aux_data_, const struct dataset *ds UNUSED)
 {
   struct multipass_aux_data *aux_data = aux_data_;
   return casefile_append (aux_data->casefile, c);
@@ -170,7 +177,7 @@ multipass_case_func (const struct ccase *c, void *aux_data_, const struct datase
 
 /* End-of-file function for multipass_procedure(). */
 static bool
-multipass_end_func (void *aux_data_, const struct dataset *ds UNUSED) 
+multipass_end_func (void *aux_data_, const struct dataset *ds UNUSED)
 {
   struct multipass_aux_data *aux_data = aux_data_;
   return (aux_data->proc_func == NULL
@@ -181,7 +188,7 @@ multipass_end_func (void *aux_data_, const struct dataset *ds UNUSED)
    The entire active file is passed to PROC_FUNC, with the given
    AUX as auxiliary data, as a unit. */
 bool
-multipass_procedure (struct dataset *ds, casefile_func *proc_func,  void *aux) 
+multipass_procedure (struct dataset *ds, casefile_func *proc_func,  void *aux)
 {
   struct multipass_aux_data aux_data;
   bool ok;
@@ -201,6 +208,7 @@ multipass_procedure (struct dataset *ds, casefile_func *proc_func,  void *aux)
   return ok;
 }
 
+
 /* Procedure implementation. */
 
 /* Executes a procedure.
@@ -211,18 +219,27 @@ multipass_procedure (struct dataset *ds, casefile_func *proc_func,  void *aux)
 static bool
 internal_procedure (struct dataset *ds, case_func *proc,
 		    end_func *end,
-                    void *aux) 
+                    void *aux)
 {
   struct ccase *c;
   bool ok = true;
-  
+
   proc_open (ds);
   while (ok && proc_read (ds, &c))
     if (proc != NULL)
       ok = proc (c, aux, ds) && ok;
   if (end != NULL)
     ok = end (aux, ds) && ok;
-  return proc_close (ds) && ok;
+
+  if ( proc_close (ds) && ok )
+    {
+      if ( ds->replace_source )
+	ds->replace_source (ds->proc_source);
+
+      return true;
+    }
+
+  return false;
 }
 
 /* Opens dataset DS for reading cases with proc_read.
@@ -251,13 +268,13 @@ proc_open (struct dataset *ds)
    Return false at end of file or if a read error occurs.  In
    this case a null pointer is stored in *C. */
 bool
-proc_read (struct dataset *ds, struct ccase **c) 
+proc_read (struct dataset *ds, struct ccase **c)
 {
   enum trns_result retval = TRNS_DROP_CASE;
 
   assert (ds->is_open);
   *c = NULL;
-  for (;;) 
+  for (;;)
     {
       size_t case_nr;
 
@@ -278,16 +295,16 @@ proc_read (struct dataset *ds, struct ccase **c)
                                    &ds->trns_case, &case_nr);
       if (retval != TRNS_CONTINUE)
         continue;
-  
+ 
       /* Write case to LAG queue. */
       if (ds->n_lag)
         lag_case (ds, &ds->trns_case);
 
       /* Write case to replacement active file. */
       ds->cases_written++;
-      if (ds->proc_sink->class->write != NULL) 
+      if (ds->proc_sink->class->write != NULL)
         {
-          if (ds->compactor != NULL) 
+          if (ds->compactor != NULL)
             {
               dict_compactor_compact (ds->compactor, &ds->sink_case,
                                       &ds->trns_case);
@@ -296,9 +313,9 @@ proc_read (struct dataset *ds, struct ccase **c)
           else
             ds->proc_sink->class->write (ds->proc_sink, &ds->trns_case);
         }
-  
+ 
       /* Execute temporary transformations. */
-      if (ds->temporary_trns_chain != NULL) 
+      if (ds->temporary_trns_chain != NULL)
         {
           retval = trns_chain_execute (ds->temporary_trns_chain, TRNS_CONTINUE,
                                        &ds->trns_case, &ds->cases_written);
@@ -307,7 +324,7 @@ proc_read (struct dataset *ds, struct ccase **c)
         }
 
       *c = &ds->trns_case;
-      return true; 
+      return true;
     }
 }
 
@@ -317,17 +334,17 @@ proc_read (struct dataset *ds, struct ccase **c)
    If DS has not been opened, returns true without doing
    anything else. */
 bool
-proc_close (struct dataset *ds) 
+proc_close (struct dataset *ds)
 {
   if (!ds->is_open)
     return true;
 
   /* Drain any remaining cases. */
-  while (ds->ok) 
+  while (ds->ok)
     {
       struct ccase *c;
       if (!proc_read (ds, &c))
-        break; 
+        break;
     }
   ds->ok = free_case_source (ds->proc_source) && ds->ok;
   ds->proc_source = NULL;
@@ -343,7 +360,7 @@ proc_close (struct dataset *ds)
 
 /* Updates last_proc_invocation. */
 static void
-update_last_proc_invocation (struct dataset *ds) 
+update_last_proc_invocation (struct dataset *ds)
 {
   ds->last_proc_invocation = time (NULL);
 }
@@ -358,7 +375,7 @@ create_trns_case (struct ccase *trns_case, struct dictionary *dict)
   size_t i;
 
   case_create (trns_case, dict_get_next_value_idx (dict));
-  for (i = 0; i < var_cnt; i++) 
+  for (i = 0; i < var_cnt; i++)
     {
       struct variable *v = dict_get_var (dict, i);
       union value *value = case_data_rw (trns_case, v);
@@ -387,7 +404,7 @@ open_active_file (struct dataset *ds)
     ds->permanent_dict = ds->dict;
 
   /* Figure out whether to compact. */
-  ds->compactor = 
+  ds->compactor =
     (dict_compacting_would_shrink (ds->permanent_dict)
      ? dict_make_compactor (ds->permanent_dict)
      : NULL);
@@ -405,7 +422,7 @@ open_active_file (struct dataset *ds)
   if (ds->n_lag > 0)
     {
       int i;
-  
+ 
       ds->lag_count = 0;
       ds->lag_head = 0;
       ds->lag_queue = xnmalloc (ds->n_lag, sizeof *ds->lag_queue);
@@ -433,17 +450,17 @@ clear_case (const struct dataset *ds, struct ccase *c)
 {
   size_t var_cnt = dict_get_var_cnt (ds->dict);
   size_t i;
-  
-  for (i = 0; i < var_cnt; i++) 
+ 
+  for (i = 0; i < var_cnt; i++)
     {
       struct variable *v = dict_get_var (ds->dict, i);
-      if (!var_get_leave (v)) 
+      if (!var_get_leave (v))
         {
           if (var_is_numeric (v))
-            case_data_rw (c, v)->f = SYSMIS; 
+            case_data_rw (c, v)->f = SYSMIS;
           else
             memset (case_data_rw (c, v)->s, ' ', var_get_width (v));
-        } 
+        }
     }
 }
 
@@ -455,24 +472,24 @@ close_active_file (struct dataset *ds)
   if (ds->n_lag > 0)
     {
       int i;
-      
+     
       for (i = 0; i < ds->n_lag; i++)
 	case_destroy (&ds->lag_queue[i]);
       free (ds->lag_queue);
       ds->n_lag = 0;
     }
-  
+ 
   /* Dictionary from before TEMPORARY becomes permanent. */
   proc_cancel_temporary_transformations (ds);
 
   /* Finish compacting. */
-  if (ds->compactor != NULL) 
+  if (ds->compactor != NULL)
     {
       dict_compactor_destroy (ds->compactor);
       dict_compact_values (ds->dict);
       ds->compactor = NULL;
     }
-    
+   
   /* Old data sink becomes new data source. */
   if (ds->proc_sink->class->make_source != NULL)
     ds->proc_source = ds->proc_sink->class->make_source (ds->proc_sink);
@@ -506,13 +523,13 @@ lagged_case (const struct dataset *ds, int n_before)
 /* Procedure that separates the data into SPLIT FILE groups. */
 
 /* Represents auxiliary data for handling SPLIT FILE. */
-struct split_aux_data 
+struct split_aux_data
   {
     struct dataset *dataset;    /* The dataset */
     struct ccase prev_case;     /* Data in previous case. */
 
     /* Callback functions. */
-    begin_func *begin; 
+    begin_func *begin;
     case_func *proc;
     end_func *end;
     void *func_aux;
@@ -532,19 +549,19 @@ static bool split_procedure_end_func (void *, const struct dataset *);
    passed to each of the functions as auxiliary data.
 
    If the active file is empty, none of BEGIN_FUNC, PROC_FUNC,
-   and END_FUNC will be called at all. 
+   and END_FUNC will be called at all.
 
    If SPLIT FILE is not in effect, then there is one break group
    (if the active file is nonempty), and BEGIN_FUNC and END_FUNC
    will be called once.
-   
+  
    Returns true if successful, false if an I/O error occurred. */
 bool
 procedure_with_splits (struct dataset *ds,
-		       begin_func begin, 
+		       begin_func begin,
 		       case_func *proc,
                        end_func *end,
-                       void *func_aux) 
+                       void *func_aux)
 {
   struct split_aux_data split_aux;
   bool ok;
@@ -566,7 +583,7 @@ procedure_with_splits (struct dataset *ds,
 
 /* Case callback used by procedure_with_splits(). */
 static bool
-split_procedure_case_func (const struct ccase *c, void *split_aux_, const struct dataset *ds) 
+split_procedure_case_func (const struct ccase *c, void *split_aux_, const struct dataset *ds)
 {
   struct split_aux_data *split_aux = split_aux_;
 
@@ -590,7 +607,7 @@ split_procedure_case_func (const struct ccase *c, void *split_aux_, const struct
 
 /* End-of-file callback used by procedure_with_splits(). */
 static bool
-split_procedure_end_func (void *split_aux_, const struct dataset *ds) 
+split_procedure_end_func (void *split_aux_, const struct dataset *ds)
 {
   struct split_aux_data *split_aux = split_aux_;
 
@@ -602,8 +619,8 @@ split_procedure_end_func (void *split_aux_, const struct dataset *ds)
 /* Compares the SPLIT FILE variables in cases A and B and returns
    nonzero only if they differ. */
 static int
-equal_splits (const struct ccase *a, const struct ccase *b, 
-	      const struct dataset *ds) 
+equal_splits (const struct ccase *a, const struct ccase *b,
+	      const struct dataset *ds)
 {
   return case_compare (a, b,
                        dict_get_split_vars (ds->dict),
@@ -615,14 +632,14 @@ equal_splits (const struct ccase *a, const struct ccase *b,
 
 /* Represents auxiliary data for handling SPLIT FILE in a
    multipass procedure. */
-struct multipass_split_aux_data 
+struct multipass_split_aux_data
   {
     struct dataset *dataset;    /* The dataset of the split */
     struct ccase prev_case;     /* Data in previous case. */
     struct casefile *casefile;  /* Accumulates data for a split. */
-    split_func *split;          /* Function to call with the accumulated 
+    split_func *split;          /* Function to call with the accumulated
 				   data. */
-    void *func_aux;             /* Auxiliary data. */ 
+    void *func_aux;             /* Auxiliary data. */
   };
 
 static bool multipass_split_case_func (const struct ccase *c, void *aux_, const struct dataset *);
@@ -631,7 +648,7 @@ static bool multipass_split_output (struct multipass_split_aux_data *, const str
 
 /* Returns true if successful, false if an I/O error occurred. */
 bool
-multipass_procedure_with_splits (struct dataset *ds, 
+multipass_procedure_with_splits (struct dataset *ds,
 				 split_func  *split,
                                  void *func_aux)
 {
@@ -670,7 +687,7 @@ multipass_split_case_func (const struct ccase *c, void *aux_, const struct datas
         ok = multipass_split_output (aux, ds);
 
       /* Start a new casefile. */
-      aux->casefile = 
+      aux->casefile =
 	ds->cf_factory->create_casefile (ds->cf_factory,
 					 dict_get_next_value_idx (ds->dict));
     }
@@ -690,7 +707,7 @@ static bool
 multipass_split_output (struct multipass_split_aux_data *aux, const struct dataset *ds)
 {
   bool ok;
-  
+ 
   assert (aux->casefile != NULL);
   ok = aux->split (&aux->prev_case, aux->casefile, aux->func_aux, ds);
   casefile_destroy (aux->casefile);
@@ -708,9 +725,12 @@ discard_variables (struct dataset *ds)
   fh_set_default_handle (NULL);
 
   ds->n_lag = 0;
-  
+ 
   free_case_source (ds->proc_source);
   ds->proc_source = NULL;
+  if ( ds->replace_source )
+    ds->replace_source (ds->proc_source);
+
 
   proc_cancel_all_transformations (ds);
 }
@@ -719,10 +739,10 @@ discard_variables (struct dataset *ds)
    and clears the permanent transformations.
    For use by INPUT PROGRAM. */
 struct trns_chain *
-proc_capture_transformations (struct dataset *ds) 
+proc_capture_transformations (struct dataset *ds)
 {
   struct trns_chain *chain;
-  
+ 
   assert (ds->temporary_trns_chain == NULL);
   chain = ds->permanent_trns_chain;
   ds->cur_trns_chain = ds->permanent_trns_chain = trns_chain_create ();
@@ -744,7 +764,7 @@ add_transformation (struct dataset *ds, trns_proc_func *proc, trns_free_func *fr
    FINALIZE will be called.
    The functions are passed AUX as auxiliary data. */
 void
-add_transformation_with_finalizer (struct dataset *ds, 
+add_transformation_with_finalizer (struct dataset *ds,
 				   trns_finalize_func *finalize,
                                    trns_proc_func *proc,
                                    trns_free_func *free, void *aux)
@@ -756,7 +776,7 @@ add_transformation_with_finalizer (struct dataset *ds,
    This value can be returned by a transformation procedure
    function to indicate a "jump" to that transformation. */
 size_t
-next_transformation (const struct dataset *ds) 
+next_transformation (const struct dataset *ds)
 {
   return trns_chain_next (ds->cur_trns_chain);
 }
@@ -765,7 +785,7 @@ next_transformation (const struct dataset *ds)
    a temporary transformation, false if it will add a permanent
    transformation. */
 bool
-proc_in_temporary_transformations (const struct dataset *ds) 
+proc_in_temporary_transformations (const struct dataset *ds)
 {
   return ds->temporary_trns_chain != NULL;
 }
@@ -774,7 +794,7 @@ proc_in_temporary_transformations (const struct dataset *ds)
    Further calls to add_transformation() will add temporary
    transformations. */
 void
-proc_start_temporary_transformations (struct dataset *ds) 
+proc_start_temporary_transformations (struct dataset *ds)
 {
   if (!proc_in_temporary_transformations (ds))
     {
@@ -791,9 +811,9 @@ proc_start_temporary_transformations (struct dataset *ds)
    permanent.
    Returns true if anything changed, false otherwise. */
 bool
-proc_make_temporary_transformations_permanent (struct dataset *ds) 
+proc_make_temporary_transformations_permanent (struct dataset *ds)
 {
-  if (proc_in_temporary_transformations (ds)) 
+  if (proc_in_temporary_transformations (ds))
     {
       trns_chain_finalize (ds->temporary_trns_chain);
       trns_chain_splice (ds->permanent_trns_chain, ds->temporary_trns_chain);
@@ -812,9 +832,9 @@ proc_make_temporary_transformations_permanent (struct dataset *ds)
    transformations will be permanent.
    Returns true if anything changed, false otherwise. */
 bool
-proc_cancel_temporary_transformations (struct dataset *ds) 
+proc_cancel_temporary_transformations (struct dataset *ds)
 {
-  if (proc_in_temporary_transformations (ds)) 
+  if (proc_in_temporary_transformations (ds))
     {
       dict_destroy (ds->dict);
       ds->dict = ds->permanent_dict;
@@ -844,11 +864,16 @@ proc_cancel_all_transformations (struct dataset *ds)
 
 /* Initializes procedure handling. */
 struct dataset *
-create_dataset (struct casefile_factory *fact)
+create_dataset (struct casefile_factory *fact,
+		replace_source_callback *rps,
+		replace_dictionary_callback *rds
+		)
 {
   struct dataset *ds = xzalloc (sizeof(*ds));
   ds->dict = dict_create ();
   ds->cf_factory = fact;
+  ds->replace_source = rps;
+  ds->replace_dict = rds;
   proc_cancel_all_transformations (ds);
   return ds;
 }
@@ -866,7 +891,7 @@ destroy_dataset (struct dataset *ds)
 /* Sets SINK as the destination for procedure output from the
    next procedure. */
 void
-proc_set_sink (struct dataset *ds, struct case_sink *sink) 
+proc_set_sink (struct dataset *ds, struct case_sink *sink)
 {
   assert (ds->proc_sink == NULL);
   ds->proc_sink = sink;
@@ -875,7 +900,7 @@ proc_set_sink (struct dataset *ds, struct case_sink *sink)
 /* Sets SOURCE as the source for procedure input for the next
    procedure. */
 void
-proc_set_source (struct dataset *ds, struct case_source *source) 
+proc_set_source (struct dataset *ds, struct case_source *source)
 {
   assert (ds->proc_source == NULL);
   ds->proc_source = source;
@@ -884,7 +909,7 @@ proc_set_source (struct dataset *ds, struct case_source *source)
 /* Returns true if a source for the next procedure has been
    configured, false otherwise. */
 bool
-proc_has_source (const struct dataset *ds) 
+proc_has_source (const struct dataset *ds)
 {
   return ds->proc_source != NULL;
 }
@@ -894,7 +919,7 @@ proc_has_source (const struct dataset *ds)
    The returned casefile is owned by the caller; it will not be
    automatically used for the next procedure's input. */
 struct casefile *
-proc_capture_output (struct dataset *ds) 
+proc_capture_output (struct dataset *ds)
 {
   struct casefile *casefile;
 
@@ -917,7 +942,7 @@ static trns_free_func case_limit_trns_free;
 /* Adds a transformation that limits the number of cases that may
    pass through, if DS->DICT has a case limit. */
 static void
-add_case_limit_trns (struct dataset *ds) 
+add_case_limit_trns (struct dataset *ds)
 {
   size_t case_limit = dict_get_case_limit (ds->dict);
   if (case_limit != 0)
@@ -934,10 +959,10 @@ add_case_limit_trns (struct dataset *ds)
    *CASES_REMAINING. */
 static int
 case_limit_trns_proc (void *cases_remaining_,
-                      struct ccase *c UNUSED, casenumber case_nr UNUSED) 
+                      struct ccase *c UNUSED, casenumber case_nr UNUSED)
 {
   size_t *cases_remaining = cases_remaining_;
-  if (*cases_remaining > 0) 
+  if (*cases_remaining > 0)
     {
       (*cases_remaining)--;
       return TRNS_CONTINUE;
@@ -948,7 +973,7 @@ case_limit_trns_proc (void *cases_remaining_,
 
 /* Frees the data associated with a case limit transformation. */
 static bool
-case_limit_trns_free (void *cases_remaining_) 
+case_limit_trns_free (void *cases_remaining_)
 {
   size_t *cases_remaining = cases_remaining_;
   free (cases_remaining);
@@ -960,10 +985,10 @@ static trns_proc_func filter_trns_proc;
 /* Adds a temporary transformation to filter data according to
    the variable specified on FILTER, if any. */
 static void
-add_filter_trns (struct dataset *ds) 
+add_filter_trns (struct dataset *ds)
 {
   struct variable *filter_var = dict_get_filter (ds->dict);
-  if (filter_var != NULL) 
+  if (filter_var != NULL)
     {
       proc_start_temporary_transformations (ds);
       add_transformation (ds, filter_trns_proc, NULL, filter_var);
@@ -973,8 +998,8 @@ add_filter_trns (struct dataset *ds)
 /* FILTER transformation. */
 static int
 filter_trns_proc (void *filter_var_,
-                  struct ccase *c UNUSED, casenumber case_nr UNUSED) 
-  
+                  struct ccase *c UNUSED, casenumber case_nr UNUSED)
+
 {
   struct variable *filter_var = filter_var_;
   double f = case_num (c, filter_var);
@@ -990,19 +1015,23 @@ dataset_dict (const struct dataset *ds)
 }
 
 
-void 
+void
 dataset_set_dict (struct dataset *ds, struct dictionary *dict)
 {
+  dict_copy_callbacks (dict, ds->dict);
   ds->dict = dict;
+
+  if ( ds->replace_dict )
+    ds->replace_dict (dict);
 }
 
-int 
+int
 dataset_n_lag (const struct dataset *ds)
 {
   return ds->n_lag;
 }
 
-void 
+void
 dataset_set_n_lag (struct dataset *ds, int n_lag)
 {
   ds->n_lag = n_lag;