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Diffstat (limited to 'bootstrap/bmake/lst.lib/lstDeQueue.c')
| -rw-r--r-- | bootstrap/bmake/lst.lib/lstDeQueue.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/bootstrap/bmake/lst.lib/lstDeQueue.c b/bootstrap/bmake/lst.lib/lstDeQueue.c new file mode 100644 index 00000000000..1aa2c7211b2 --- /dev/null +++ b/bootstrap/bmake/lst.lib/lstDeQueue.c @@ -0,0 +1,92 @@ +/* $NetBSD: lstDeQueue.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $ */ + +/* + * Copyright (c) 1988, 1989, 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Adam de Boor. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifdef MAKE_BOOTSTRAP +static char rcsid[] = "$NetBSD: lstDeQueue.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"; +#else +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)lstDeQueue.c 8.1 (Berkeley) 6/6/93"; +#else +__RCSID("$NetBSD: lstDeQueue.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"); +#endif +#endif /* not lint */ +#endif + +/*- + * LstDeQueue.c -- + * Remove the node and return its datum from the head of the list + */ + +#include "lstInt.h" + +/*- + *----------------------------------------------------------------------- + * Lst_DeQueue -- + * Remove and return the datum at the head of the given list. + * + * Results: + * The datum in the node at the head or (ick) NIL if the list + * is empty. + * + * Side Effects: + * The head node is removed from the list. + * + *----------------------------------------------------------------------- + */ +ClientData +Lst_DeQueue (l) + Lst l; +{ + ClientData rd; + register ListNode tln; + + tln = (ListNode) Lst_First (l); + if (tln == NilListNode) { + return ((ClientData) NIL); + } + + rd = tln->datum; + if (Lst_Remove (l, (LstNode)tln) == FAILURE) { + return ((ClientData) NIL); + } else { + return (rd); + } +} + |