X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fcasewriter-translator.c;h=c630b44cda397dfffccd980c9d3ecb65255e91dc;hb=9691c54c1a51792e21c10bbee7a66f5934b96349;hp=7252eaa50542bafdd627ce44c56eda881a8c6351;hpb=f5c108becd49d78f4898cab11352291f5689d24e;p=pspp-builds.git

diff --git a/src/data/casewriter-translator.c b/src/data/casewriter-translator.c
index 7252eaa5..c630b44c 100644
--- a/src/data/casewriter-translator.c
+++ b/src/data/casewriter-translator.c
@@ -1,20 +1,18 @@
-/* PSPP - computes sample statistics.
+/* PSPP - a program for statistical analysis.
    Copyright (C) 2007 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>
 
@@ -31,17 +29,29 @@ struct casewriter_translator
   {
     struct casewriter *subwriter;
 
-    void (*translate) (const struct ccase *input, struct ccase *output,
-                       void *aux);
+    void (*translate) (struct ccase *input, struct ccase *output, void *aux);
     bool (*destroy) (void *aux);
     void *aux;
   };
 
-static struct casewriter_class casewriter_translator_class;
+static const struct casewriter_class casewriter_translator_class;
 
+/* Creates and returns a new casewriter whose cases are passed
+   through TRANSLATE, which must create case OUTPUT, with
+   OUTPUT_VALUE_CNT values, and populate it based on INPUT and
+   auxiliary data AUX.  The translated cases are then written to
+   SUBWRITER.  TRANSLATE must also destroy INPUT.
+
+   When the translating casewriter is destroyed, DESTROY will be
+   called to allow any state maintained by TRANSLATE to be freed.
+
+   After this function is called, SUBWRITER must not ever again
+   be referenced directly.  It will be destroyed automatically
+   when the translating casewriter is destroyed. */
 struct casewriter *
 casewriter_create_translator (struct casewriter *subwriter,
-                              void (*translate) (const struct ccase *input,
+                              size_t translated_value_cnt,
+                              void (*translate) (struct ccase *input,
                                                  struct ccase *output,
                                                  void *aux),
                               bool (*destroy) (void *aux),
@@ -53,7 +63,8 @@ casewriter_create_translator (struct casewriter *subwriter,
   ct->translate = translate;
   ct->destroy = destroy;
   ct->aux = aux;
-  writer = casewriter_create (&casewriter_translator_class, ct);
+  writer = casewriter_create (translated_value_cnt,
+                              &casewriter_translator_class, ct);
   taint_propagate (casewriter_get_taint (ct->subwriter),
                    casewriter_get_taint (writer));
   return writer;
@@ -90,7 +101,7 @@ casewriter_translator_convert_to_reader (struct casewriter *writer UNUSED,
   return reader;
 }
 
-static struct casewriter_class casewriter_translator_class =
+static const struct casewriter_class casewriter_translator_class =
   {
     casewriter_translator_write,
     casewriter_translator_destroy,