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author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2013-04-01 14:07:52 +0000 |
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committer | <> | 2013-05-17 14:06:43 +0000 |
commit | 986bc2ac05bc4c08c6a0ed30c9e97674932ccfeb (patch) | |
tree | 8346daf16e98e93415195acbf99f09cb5326b73b /lst.lib/lstIsEmpty.c | |
download | bmake-tarball-8d1ac348edb944f3af2e3b32db4eaa8fdf5b0e3a.tar.gz |
Diffstat (limited to 'lst.lib/lstIsEmpty.c')
-rw-r--r-- | lst.lib/lstIsEmpty.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/lst.lib/lstIsEmpty.c b/lst.lib/lstIsEmpty.c new file mode 100644 index 0000000..8b1d6ed --- /dev/null +++ b/lst.lib/lstIsEmpty.c @@ -0,0 +1,75 @@ +/* $NetBSD: lstIsEmpty.c,v 1.11 2008/12/13 15:19:29 dsl 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. 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. + */ + +#ifndef MAKE_NATIVE +static char rcsid[] = "$NetBSD: lstIsEmpty.c,v 1.11 2008/12/13 15:19:29 dsl Exp $"; +#else +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)lstIsEmpty.c 8.1 (Berkeley) 6/6/93"; +#else +__RCSID("$NetBSD: lstIsEmpty.c,v 1.11 2008/12/13 15:19:29 dsl Exp $"); +#endif +#endif /* not lint */ +#endif + +/*- + * LstIsEmpty.c -- + * A single function to decide if a list is empty + */ + +#include "lstInt.h" + +/*- + *----------------------------------------------------------------------- + * Lst_IsEmpty -- + * Return TRUE if the given list is empty. + * + * Results: + * TRUE if the list is empty, FALSE otherwise. + * + * Side Effects: + * None. + * + * A list is considered empty if its firstPtr == NULL (or if + * the list itself is NULL). + *----------------------------------------------------------------------- + */ +Boolean +Lst_IsEmpty(Lst l) +{ + return ( ! LstValid (l) || LstIsEmpty(l)); +} + |