X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fstats%2Fdescriptives.c;h=68b19300f6921f80410b7cef01ebe51ab2239876;hb=e6e91e018e8d6c278aff859be10f5ddfcc06dd6d;hp=4b1ea6e2fa8bc0974fd8252b1bc233cc05597665;hpb=f5c108becd49d78f4898cab11352291f5689d24e;p=pspp

diff --git a/src/language/stats/descriptives.c b/src/language/stats/descriptives.c
index 4b1ea6e2fa..68b19300f6 100644
--- a/src/language/stats/descriptives.c
+++ b/src/language/stats/descriptives.c
@@ -1,20 +1,18 @@
-/* PSPP - computes sample statistics.
-   Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 1997-9, 2000, 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 the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   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
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   This program is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA. */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
 
@@ -32,16 +30,16 @@
 #include <language/dictionary/split-file.h>
 #include <language/lexer/lexer.h>
 #include <language/lexer/variable-parser.h>
-#include <libpspp/alloc.h>
 #include <libpspp/array.h>
 #include <libpspp/compiler.h>
-#include <libpspp/magic.h>
 #include <libpspp/message.h>
 #include <libpspp/assertion.h>
 #include <math/moments.h>
 #include <output/manager.h>
 #include <output/table.h>
 
+#include "xalloc.h"
+
 #include "gettext.h"
 #define _(msgid) gettext (msgid)
 #define N_(msgid) msgid
@@ -125,7 +123,7 @@ static const struct dsc_statistic_info dsc_info[DSC_N_STATS] =
 struct dsc_var
   {
     const struct variable *v;         /* Variable to calculate on. */
-    char z_name[LONG_NAME_LEN + 1]; /* Name for z-score variable. */
+    char z_name[VAR_NAME_LEN + 1]; /* Name for z-score variable. */
     double valid, missing;	/* Valid, missing counts. */
     struct moments *moments;    /* Moments. */
     double min, max;            /* Maximum and mimimum values. */
@@ -412,7 +410,7 @@ cmd_descriptives (struct lexer *lexer, struct dataset *ds)
     for (i = 0; i < dsc->var_cnt; i++)
       dsc->vars[i].moments = moments_create (dsc->max_moment);
 
-  /* Data pass.  FIXME: error handling. */
+  /* Data pass. */
   grouper = casegrouper_create_splits (proc_open (ds), dict);
   while (casegrouper_get_next_group (grouper, &group))
     calc_descriptives (dsc, group, ds);
@@ -497,7 +495,7 @@ static bool
 generate_z_varname (const struct dictionary *dict, struct dsc_proc *dsc, char *z_name,
                     const char *var_name, int *z_cnt)
 {
-  char name[LONG_NAME_LEN + 1];
+  char name[VAR_NAME_LEN + 1];
 
   /* Try a name based on the original variable name. */
   name[0] = 'Z';
@@ -585,7 +583,7 @@ dump_z_table (struct dsc_proc *dsc)
    (either system or user-missing values that weren't included).
 */
 static int
-descriptives_trns_proc (void *trns_, struct ccase * c,
+descriptives_trns_proc (void *trns_, struct ccase **c,
                         casenumber case_idx UNUSED)
 {
   struct dsc_trns *t = trns_;
@@ -598,7 +596,7 @@ descriptives_trns_proc (void *trns_, struct ccase * c,
       assert(t->vars);
       for (vars = t->vars; vars < t->vars + t->var_cnt; vars++)
 	{
-	  double score = case_num (c, *vars);
+	  double score = case_num (*c, *vars);
 	  if (var_is_num_missing (*vars, score, t->exclude))
 	    {
 	      all_sysmis = 1;
@@ -607,10 +605,11 @@ descriptives_trns_proc (void *trns_, struct ccase * c,
 	}
     }
 
+  *c = case_unshare (*c);
   for (z = t->z_scores; z < t->z_scores + t->z_score_cnt; z++)
     {
-      double input = case_num (c, z->src_var);
-      double *output = &case_data_rw (c, z->z_var)->f;
+      double input = case_num (*c, z->src_var);
+      double *output = &case_data_rw (*c, z->z_var)->f;
 
       if (z->mean == SYSMIS || z->std_dev == SYSMIS || all_sysmis
           || var_is_num_missing (z->src_var, input, t->exclude))
@@ -697,20 +696,23 @@ calc_descriptives (struct dsc_proc *dsc, struct casereader *group,
                    struct dataset *ds)
 {
   struct casereader *pass1, *pass2;
-  struct ccase c;
+  struct ccase *c;
   size_t i;
 
-  if (!casereader_peek (group, 0, &c))
-    return;
-  output_split_file_values (ds, &c);
-  case_destroy (&c);
+  c = casereader_peek (group, 0);
+  if (c == NULL)
+    {
+      casereader_destroy (group);
+      return;
+    }
+  output_split_file_values (ds, c);
+  case_unref (c);
 
   group = casereader_create_filter_weight (group, dataset_dict (ds),
                                            NULL, NULL);
 
-  casereader_split (group, &pass1, &pass2);
-  if (dsc->max_moment <= MOMENT_MEAN)
-    casereader_destroy (pass2);
+  pass1 = group;
+  pass2 = dsc->max_moment <= MOMENT_MEAN ? NULL : casereader_clone (pass1);
 
   for (i = 0; i < dsc->var_cnt; i++)
     {
@@ -726,12 +728,12 @@ calc_descriptives (struct dsc_proc *dsc, struct casereader *group,
   dsc->valid = 0.;
 
   /* First pass to handle most of the work. */
-  for (; casereader_read (pass1, &c); case_destroy (&c))
+  for (; (c = casereader_read (pass1)) != NULL; case_unref (c))
     {
-      double weight = dict_get_case_weight (dataset_dict (ds), &c, NULL);
+      double weight = dict_get_case_weight (dataset_dict (ds), c, NULL);
 
       /* Check for missing values. */
-      if (listwise_missing (dsc, &c))
+      if (listwise_missing (dsc, c))
         {
           dsc->missing_listwise += weight;
           if (dsc->missing_type == DSC_LISTWISE)
@@ -742,7 +744,7 @@ calc_descriptives (struct dsc_proc *dsc, struct casereader *group,
       for (i = 0; i < dsc->var_cnt; i++)
         {
           struct dsc_var *dv = &dsc->vars[i];
-          double x = case_num (&c, dv->v);
+          double x = case_num (c, dv->v);
 
           if (var_is_num_missing (dv->v, x, dsc->exclude))
             {
@@ -760,23 +762,26 @@ calc_descriptives (struct dsc_proc *dsc, struct casereader *group,
         }
     }
   if (!casereader_destroy (pass1))
-    return;
+    {
+      casereader_destroy (pass2);
+      return;
+    }
 
   /* Second pass for higher-order moments. */
   if (dsc->max_moment > MOMENT_MEAN)
     {
-      for (; casereader_read (pass2, &c); case_destroy (&c))
+      for (; (c = casereader_read (pass2)) != NULL; case_unref (c))
         {
-          double weight = dict_get_case_weight (dataset_dict (ds), &c, NULL);
+          double weight = dict_get_case_weight (dataset_dict (ds), c, NULL);
 
           /* Check for missing values. */
-          if (dsc->missing_type == DSC_LISTWISE && listwise_missing (dsc, &c))
+          if (dsc->missing_type == DSC_LISTWISE && listwise_missing (dsc, c))
             continue;
 
           for (i = 0; i < dsc->var_cnt; i++)
             {
               struct dsc_var *dv = &dsc->vars[i];
-              double x = case_num (&c, dv->v);
+              double x = case_num (c, dv->v);
 
               if (var_is_num_missing (dv->v, x, dsc->exclude))
                 continue;