Until now, the procedure code has provided a case to the case_source,

[pspp-builds.git] / src / data / caseinit.h

diff --git a/src/data/caseinit.h b/src/data/caseinit.h
new file mode 100644 (file)
index 0000000..6d8e790
--- /dev/null
+++ b/src/data/caseinit.h
@@ -0,0 +1,48 @@
+/* PSPP - computes sample statistics.
+   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 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. */
+
+/* Case initializer.
+   
+   The procedure code has to resize cases provided by the active
+   file data source, to provide room for any other variables that
+   should go in the case, fill in the values of "left" variables,
+   and initialize the values of other non-left variable to zero
+   or spaces.  Then, when we're done with that case, we have to
+   save the values of "left" variables to copy into the next case
+   read from the active file.
+
+   The caseinit code helps with this. */
+
+#ifndef DATA_CASEINIT_H
+#define DATA_CASEINIT_H 1
+
+struct dictionary;
+struct ccase;
+
+struct caseinit *caseinit_create (void);
+void caseinit_clear (struct caseinit *);
+void caseinit_destroy (struct caseinit *);
+
+void caseinit_mark_as_preinited (struct caseinit *, const struct dictionary *);
+void caseinit_mark_for_init (struct caseinit *, const struct dictionary *);
+
+void caseinit_init_reinit_vars (const struct caseinit *, struct ccase *);
+void caseinit_init_left_vars (const struct caseinit *, struct ccase *);
+void caseinit_update_left_vars (struct caseinit *, const struct ccase *);
+
+#endif /* data/caseinit.h */