#

1 files changed, 38 insertions, 0 deletions

diff --git a/oldXMenu/insque.c b/oldXMenu/insque.c
new file mode 100644
index 00000000000..4d264434d26
--- /dev/null
+++ b/oldXMenu/insque.c
@@ -0,0 +1,38 @@
+/* This file implements the emacs_insque and emacs_remque functions,
+   copies of the insque and remque functions of BSD.  They and all
+   their callers have been renamed to emacs_mumble to allow us to
+   include this file in the menu library on all systems.  */
+
+
+struct qelem {
+  struct    qelem *q_forw;
+  struct    qelem *q_back;
+  char q_data[1];
+};
+
+/* Insert ELEM into a doubly-linked list, after PREV.  */
+
+void
+emacs_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.  */
+
+emacs_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;
+}