[src/trunk]: src/lib/libc/string switch to FreeBSD's memmem

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/726ecbfb3a0e
branches:  trunk
changeset: 320448:726ecbfb3a0e
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Jul 08 17:53:42 2018 +0000

description:
switch to FreeBSD's memmem

diffstat:

 lib/libc/string/memmem.c |  80 ------------------------------------------------
 1 files changed, 0 insertions(+), 80 deletions(-)

diffs (84 lines):

diff -r bd8ab4f82a6d -r 726ecbfb3a0e lib/libc/string/memmem.c
--- a/lib/libc/string/memmem.c  Sun Jul 08 17:53:12 2018 +0000
+++ /dev/null   Thu Jan 01 00:00:00 1970 +0000
@@ -1,80 +0,0 @@
-/*     $NetBSD: memmem.c,v 1.2 2008/04/28 20:23:00 martin Exp $        */
-
-/*-
- * Copyright (c) 2005 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Perry E. Metzger of Metzger, Dowdeswell & Co. LLC.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
- */
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: memmem.c,v 1.2 2008/04/28 20:23:00 martin Exp $");
-#endif /* LIBC_SCCS and not lint */
-
-#if !defined(_KERNEL) && !defined(_STANDALONE)
-#include <assert.h>
-#include <string.h>
-#else
-#include <lib/libkern/libkern.h>
-#define _DIAGASSERT(x) (void)0
-#define        NULL            ((void *)0)
-#endif
-
-void *
-memmem(const void *block, size_t blen, const void *pat, size_t plen)
-{
-       const unsigned char *bp, *pp, *endp;
-
-       _DIAGASSERT(block != NULL);
-       _DIAGASSERT(pat != NULL);
-
-       /*
-        * Following the precedent in ststr(3) and glibc, a zero
-        * length pattern matches the start of block.
-        */
-       if (plen == 0)
-               return __UNCONST(block);
-
-       if (blen < plen)
-               return NULL;
-
-       bp = block;
-       pp = pat;
-       endp = bp + (blen - plen) + 1;
-
-       /*
-        * As a cheezy optimization, check that the first chars are
-        * the same before calling memcmp. Really we should use bm(3)
-        * to speed this up if blen is large enough.
-        */
-       while (bp < endp) {
-               if ((*bp == *pp) && (memcmp(bp, pp, plen) == 0))
-                       return __UNCONST(bp);
-               bp++;
-       }
-
-       return NULL;
-}