--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master/pdo.c	Wed Mar 07 11:46:02 2007 +0000
@@ -0,0 +1,109 @@
+/******************************************************************************
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
+ *
+ *  This file is part of the IgH EtherCAT Master.
+ *
+ *  The IgH EtherCAT Master 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.
+ *
+ *  The IgH EtherCAT Master 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 the IgH EtherCAT Master; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  The right to use EtherCAT Technology is granted and comes free of
+ *  charge under condition of compatibility of product made by
+ *  Licensee. People intending to distribute/sell products based on the
+ *  code, have to sign an agreement to guarantee that products using
+ *  software based on IgH EtherCAT master stay compatible with the actual
+ *  EtherCAT specification (which are released themselves as an open
+ *  standard) as the (only) precondition to have the right to use EtherCAT
+ *  Technology, IP and trade marks.
+ *
+ *****************************************************************************/
+
+/**
+   \file
+   EtherCAT process data object methods.
+*/
+
+/*****************************************************************************/
+
+#include <linux/slab.h>
+
+#include "pdo.h"
+
+/*****************************************************************************/
+
+/**
+ * PDO constructor.
+ */
+
+void ec_pdo_init(ec_pdo_t *pdo /**< EtherCAT PDO */)
+{
+    pdo->name = NULL;
+    INIT_LIST_HEAD(&pdo->entries);
+}
+
+/*****************************************************************************/
+
+/**
+ * PDO destructor.
+ */
+
+void ec_pdo_clear(ec_pdo_t *pdo /**< EtherCAT PDO */)
+{
+    ec_pdo_entry_t *entry, *next;
+
+    // free all PDO entries
+    list_for_each_entry_safe(entry, next, &pdo->entries, list) {
+        list_del(&entry->list);
+        kfree(entry);
+    }
+}
+
+/*****************************************************************************/
+
+/**
+ * Makes a deep copy of a PDO.
+ */
+
+int ec_pdo_copy(ec_pdo_t *pdo, const ec_pdo_t *other_pdo)
+{
+    ec_pdo_entry_t *entry, *other_entry, *next;
+
+    // make flat copy
+    *pdo = *other_pdo;
+
+    INIT_LIST_HEAD(&pdo->entries);
+    list_for_each_entry(other_entry, &other_pdo->entries, list) {
+        if (!(entry = (ec_pdo_entry_t *)
+                    kmalloc(sizeof(ec_pdo_entry_t), GFP_KERNEL))) {
+            EC_ERR("Failed to allocate memory for PDO entry copy.\n");
+            goto out_free;
+        }
+
+        *entry = *other_entry; // flat copy is sufficient
+        list_add_tail(&entry->list, &pdo->entries);
+    }
+
+    return 0;
+
+out_free:
+    list_for_each_entry_safe(entry, next, &pdo->entries, list) {
+        list_del(&entry->list);
+        kfree(entry);
+    }
+    return -1;
+}
+
+/*****************************************************************************/