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Annotation of src/lib/libc/stdlib/reallocarray.c, Revision 1.5

1.5     ! kamil       1: /*     $NetBSD$        */
1.1       christos    2: /*     $OpenBSD: reallocarray.c,v 1.1 2014/05/08 21:43:49 deraadt Exp $        */
1.3       christos    3:
                      4: /*-
                      5:  * Copyright (c) 2015 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by Christos Zoulas.
1.1       christos   10:  *
1.3       christos   11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
1.1       christos   19:  *
1.3       christos   20:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     21:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     22:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     23:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     24:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     25:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     26:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     27:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     28:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     29:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     30:  * POSSIBILITY OF SUCH DAMAGE.
1.1       christos   31:  */
1.5     ! kamil      32:
1.1       christos   33: #include <sys/cdefs.h>
1.5     ! kamil      34: __RCSID("$NetBSD: reallocarray.c,v 1.4 2015/03/10 13:05:13 christos Exp $");
1.1       christos   35:
1.3       christos   36: #define _OPENBSD_SOURCE
1.1       christos   37: #include <errno.h>
                     38: #include <stdlib.h>
                     39:
                     40: void *
                     41: reallocarray(void *optr, size_t nmemb, size_t size)
                     42: {
1.4       christos   43:        if (nmemb == 0 || size == 0)
                     44:                return realloc(optr, 0);
                     45:
1.3       christos   46:        int e = reallocarr(&optr, nmemb, size);
                     47:
                     48:        if (e == 0)
                     49:                return optr;
                     50:        errno = e;
                     51:        return NULL;
1.1       christos   52: }