Date: Wed, 2 Jun 2010 17:27:24 +0000 (UTC) From: Rafal Jaworowski <raj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r208751 - in head/sys: libkern sys Message-ID: <201006021727.o52HROx0019814@svn.freebsd.org>
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Author: raj Date: Wed Jun 2 17:27:23 2010 New Revision: 208751 URL: http://svn.freebsd.org/changeset/base/208751 Log: Provide memchr() in the libkern. This is required by libfdt and will be compiled in conditionally only for FDT-enabled platforms. Reviewed by: imp Sponsored by: The FreeBSD Foundation Added: head/sys/libkern/memchr.c (contents, props changed) Modified: head/sys/sys/libkern.h Added: head/sys/libkern/memchr.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/libkern/memchr.c Wed Jun 2 17:27:23 2010 (r208751) @@ -0,0 +1,51 @@ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * 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. + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/libkern.h> +#include <sys/param.h> + +void * +memchr(const void *s, int c, size_t n) +{ + if (n != 0) { + const unsigned char *p = s; + + do { + if (*p++ == (unsigned char)c) + return ((void *)(uintptr_t)(p - 1)); + } while (--n != 0); + } + return (NULL); +} Modified: head/sys/sys/libkern.h ============================================================================== --- head/sys/sys/libkern.h Wed Jun 2 17:24:41 2010 (r208750) +++ head/sys/sys/libkern.h Wed Jun 2 17:27:23 2010 (r208751) @@ -92,6 +92,7 @@ int flsl(long); int fnmatch(const char *, const char *, int); void gets(char *, size_t, int); int locc(int, char *, u_int); +void *memchr(const void *s, int c, size_t n); int memcmp(const void *b1, const void *b2, size_t len); void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
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