mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-27 10:54:40 +00:00
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
/* Copyright (C) 2002, 2003, 2004, 2005,
|
|
2006 Free Software Foundation, Inc. */
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* arch-tag: a8719d1a-5c3f-4bce-b36b-173106d36165
|
|
(do not change this comment) */
|