libBLOC

diff --git a/iterator/iterator_absolute.c b/iterator/iterator_absolute.c
new file mode 100644
index 0000000..94f97b6
--- /dev/null
+++ b/iterator/iterator_absolute.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2023 Barry
+ *
+ * This file is part of Barry's Little Objects in C Library (libBLOC).
+ *
+ * libBLOC 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.
+ *
+ * libBLOC is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTIBILITY 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
+ * libBLOC.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stddef.h>
+#include <BLOC/iterator.h>
+#include "iterator.h"
+
+/* Get the first iteratable element */
+void *
+iterator_first(Iterator *iter)
+{
+	iter->entry = iter->list->start;
+	if (!iter->entry)
+		return NULL;
+	iter->prev = NULL;
+	iter->next = iter->entry->next;
+	iter->pos = 0;
+	return iter->entry->obj;
+}
+
+/* Get the last iteratable element */
+void *
+iterator_last(Iterator *iter)
+{
+	iter->entry = iter->list->end;
+	if (!iter->entry)
+		return NULL;
+	iter->prev = iter->entry->prev;
+	iter->next = NULL;
+	iter->pos = iter->list->entries - 1;
+	return iter->entry->obj;
+}