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60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2001, 2002, 2003,
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2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* This file implements the emacs_insque and emacs_remque functions,
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clones of the insque and remque functions of BSD. They and all
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their callers have been renamed to emacs_mumble to allow us to
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include this file in the menu library on all systems. */
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struct qelem {
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struct qelem *q_forw;
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struct qelem *q_back;
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char q_data[1];
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};
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/* Insert ELEM into a doubly-linked list, after PREV. */
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void
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emacs_insque (elem, prev)
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struct qelem *elem, *prev;
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{
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struct qelem *next = prev->q_forw;
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prev->q_forw = elem;
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if (next)
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next->q_back = elem;
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elem->q_forw = next;
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elem->q_back = prev;
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}
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/* Unlink ELEM from the doubly-linked list that it is in. */
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emacs_remque (elem)
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struct qelem *elem;
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{
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struct qelem *next = elem->q_forw;
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struct qelem *prev = elem->q_back;
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if (next)
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next->q_back = prev;
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if (prev)
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prev->q_forw = next;
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}
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/* arch-tag: a8719d1a-5c3f-4bce-b36b-173106d36165
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(do not change this comment) */
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