1 files changed, 72 insertions, 0 deletions
diff --git a/pceplib/pcep_utils_double_linked_list.h b/pceplib/pcep_utils_double_linked_list.h
new file mode 100644
index 0000000..4fe0172
--- /dev/null
+++ b/pceplib/pcep_utils_double_linked_list.h
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the PCEPlib, a PCEP protocol library.
+ *
+ * Copyright (C) 2020 Volta Networks https://voltanet.io/
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser 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 <https://www.gnu.org/licenses/>.
+ *
+ * Author : Brady Johnson <brady@voltanet.io>
+ *
+ */
+
+
+#ifndef PCEP_UTILS_INCLUDE_PCEP_UTILS_DOUBLE_LINKED_LIST_H_
+#define PCEP_UTILS_INCLUDE_PCEP_UTILS_DOUBLE_LINKED_LIST_H_
+
+typedef struct double_linked_list_node_ {
+	struct double_linked_list_node_ *prev_node;
+	struct double_linked_list_node_ *next_node;
+	void *data;
+
+} double_linked_list_node;
+
+
+typedef struct double_linked_list_ {
+	double_linked_list_node *head;
+	double_linked_list_node *tail;
+	unsigned int num_entries;
+
+} double_linked_list;
+
+
+/* Initialize a double linked list */
+double_linked_list *dll_initialize(void);
+
+/* Destroy a double linked list, by freeing the handle and nodes,
+ * user data will not be freed, and may be leaked if not handled
+ * externally. */
+void dll_destroy(double_linked_list *handle);
+/* Destroy a double linked list, by freeing the handle and nodes,
+ * and the user data. */
+void dll_destroy_with_data(double_linked_list *handle);
+void dll_destroy_with_data_memtype(double_linked_list *handle,
+				   void *data_memory_type);
+
+/* Creates a node and adds it as the first item in the list */
+double_linked_list_node *dll_prepend(double_linked_list *handle, void *data);
+
+/* Creates a node and adds it as the last item in the list */
+double_linked_list_node *dll_append(double_linked_list *handle, void *data);
+
+/* Delete the first node in the list, and return the data */
+void *dll_delete_first_node(double_linked_list *handle);
+
+/* Delete the last node in the list, and return the data */
+void *dll_delete_last_node(double_linked_list *handle);
+
+/* Delete the designated node in the list, and return the data */
+void *dll_delete_node(double_linked_list *handle,
+		      double_linked_list_node *node);
+
+#endif /* PCEP_UTILS_INCLUDE_PCEP_UTILS_DOUBLE_LINKED_LIST_H_ */