pxd: initial work

[pspp] / src / language / data-io / session.c

diff --git a/src/language/data-io/session.c b/src/language/data-io/session.c
new file mode 100644 (file)
index 0000000..86b2671
--- /dev/null
+++ b/src/language/data-io/session.c
@@ -0,0 +1,79 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2010, 2012 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 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include "data/case.h"
+#include "data/dataset.h"
+#include "data/dictionary.h"
+#include "language/command.h"
+#include "language/data-io/file-handle.h"
+#include "language/lexer/lexer.h"
+#include "libpspp/pxd.h"
+
+#include "gl/xalloc.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+int
+cmd_save_session (struct lexer *lexer, struct dataset *ds)
+{
+  struct file_handle *handle;
+  struct pxd_object *obj;
+  struct pxd_id root;
+  struct pxd *pxd;
+
+  if (!lex_force_match_id (lexer, "OUTFILE"))
+    return CMD_FAILURE;
+  lex_match (lexer, '=');
+
+  handle = fh_parse (lexer, FH_REF_FILE, dataset_session (ds));
+  if (handle == NULL)
+    return CMD_FAILURE;
+
+  pxd = pxd_open (fh_get_file_name (handle), true);
+  obj = dict_save (dataset_dict (ds), pxd);
+  pxd_get_root (pxd, &root);
+  pxd_swap_root (pxd, &root, obj);
+  pxd_close (pxd);
+
+  return CMD_SUCCESS;
+}
+
+int
+cmd_get_session (struct lexer *lexer, struct dataset *ds)
+{
+  struct file_handle *handle;
+  struct pxd_object *obj;
+  struct pxd_id root;
+  struct pxd *pxd;
+
+  if (lex_match_id (lexer, "FILE"))
+    lex_match (lexer, '=');
+
+  handle = fh_parse (lexer, FH_REF_FILE, dataset_session (ds));
+  if (handle == NULL)
+    return CMD_FAILURE;
+
+  pxd = pxd_open (fh_get_file_name (handle), false);
+  pxd_get_root (pxd, &root);
+  obj = pxd_fetch (pxd, &root);
+  dict_destroy (dict_load (obj, pxd));
+  pxd_close (pxd);
+
+  return CMD_SUCCESS;
+}