1 files changed, 38 insertions, 0 deletions
diff --git a/oldXMenu/insque.c b/oldXMenu/insque.c
new file mode 100644
index 00000000000..dd1a0ac6fc7
--- /dev/null
+++ b/oldXMenu/insque.c
@@ -0,0 +1,38 @@
+/* This file implements the insque and remque functions of BSD.
+   It is not compiled by default, because that change would be too risky
+   to install right now.  If you find that HAVE_X_MENU leads to linker errors
+   because these functions are undefined, then compile this file
+   and arrange to link it in.  */
+
+struct qelem {
+  struct    qelem *q_forw;
+  struct    qelem *q_back;
+  char q_data[1];
+};
+
+/* Insert ELEM into a doubly-linked list, after PREV.  */
+
+void
+insque (elem, prev) 
+     struct qelem *elem, *prev;
+{
+  struct qelem *next = prev->q_forw;
+  prev->q_forw = elem;
+  if (next)
+    next->q_back = elem;
+  elem->q_forw = next;
+  elem->q_back = prev;
+}
+
+/* Unlink ELEM from the doubly-linked list that it is in.  */
+
+remque (elem)
+     struct qelem *elem;
+{
+  struct qelem *next = elem->q_forw;
+  struct qelem *prev = elem->q_back;
+  if (next)
+    next->q_back = prev;
+  if (prev)
+    prev->q_forw = next;
+}