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Diffstat (limited to 'lib/libcompat/4.3/lsearch.c')
| -rw-r--r-- | lib/libcompat/4.3/lsearch.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/libcompat/4.3/lsearch.c b/lib/libcompat/4.3/lsearch.c new file mode 100644 index 0000000..be650b4 --- /dev/null +++ b/lib/libcompat/4.3/lsearch.c @@ -0,0 +1,93 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Roger L. Snyder. + * + * 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)lsearch.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> +#include <unistd.h> +#include <string.h> + +static char *linear_base(); + +char * +lsearch(key, base, nelp, width, compar) + char *key, *base; + u_int *nelp, width; + int (*compar)(); +{ + return(linear_base(key, base, nelp, width, compar, 1)); +} + +char * +lfind(key, base, nelp, width, compar) + char *key, *base; + u_int *nelp, width; + int (*compar)(); +{ + return(linear_base(key, base, nelp, width, compar, 0)); +} + +static char * +linear_base(key, base, nelp, width, compar, add_flag) + char *key, *base; + u_int *nelp, width; + int (*compar)(), add_flag; +{ + register char *element, *end; + + end = base + *nelp * width; + for (element = base; element < end; element += width) + if (!compar(element, key)) /* key found */ + return(element); + + if (!add_flag) /* key not found */ + return(NULL); + + /* + * The UNIX System User's Manual, 1986 edition claims that + * a NULL pointer is returned by lsearch with errno set + * appropriately, if there is not enough room in the table + * to add a new item. This can't be done as none of these + * routines have any method of determining the size of the + * table. This comment was isn't in the 1986-87 System V + * manual. + */ + ++*nelp; + bcopy(key, end, (int)width); + return(end); +} |
