1*61d06d6bSBaptiste Daroussin #include "config.h" 2*61d06d6bSBaptiste Daroussin 3*61d06d6bSBaptiste Daroussin #if HAVE_REALLOCARRAY 4*61d06d6bSBaptiste Daroussin 5*61d06d6bSBaptiste Daroussin int dummy; 6*61d06d6bSBaptiste Daroussin 7*61d06d6bSBaptiste Daroussin #else 8*61d06d6bSBaptiste Daroussin 9*61d06d6bSBaptiste Daroussin /* $Id: compat_reallocarray.c,v 1.4 2014/12/11 09:05:01 schwarze Exp $ */ 10*61d06d6bSBaptiste Daroussin /* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */ 11*61d06d6bSBaptiste Daroussin /* 12*61d06d6bSBaptiste Daroussin * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> 13*61d06d6bSBaptiste Daroussin * 14*61d06d6bSBaptiste Daroussin * Permission to use, copy, modify, and distribute this software for any 15*61d06d6bSBaptiste Daroussin * purpose with or without fee is hereby granted, provided that the above 16*61d06d6bSBaptiste Daroussin * copyright notice and this permission notice appear in all copies. 17*61d06d6bSBaptiste Daroussin * 18*61d06d6bSBaptiste Daroussin * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 19*61d06d6bSBaptiste Daroussin * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 20*61d06d6bSBaptiste Daroussin * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 21*61d06d6bSBaptiste Daroussin * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 22*61d06d6bSBaptiste Daroussin * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 23*61d06d6bSBaptiste Daroussin * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 24*61d06d6bSBaptiste Daroussin * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 25*61d06d6bSBaptiste Daroussin */ 26*61d06d6bSBaptiste Daroussin 27*61d06d6bSBaptiste Daroussin #include <sys/types.h> 28*61d06d6bSBaptiste Daroussin #include <errno.h> 29*61d06d6bSBaptiste Daroussin #include <stdint.h> 30*61d06d6bSBaptiste Daroussin #include <stdlib.h> 31*61d06d6bSBaptiste Daroussin 32*61d06d6bSBaptiste Daroussin /* 33*61d06d6bSBaptiste Daroussin * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX 34*61d06d6bSBaptiste Daroussin * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW 35*61d06d6bSBaptiste Daroussin */ 36*61d06d6bSBaptiste Daroussin #define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) 37*61d06d6bSBaptiste Daroussin 38*61d06d6bSBaptiste Daroussin void * 39*61d06d6bSBaptiste Daroussin reallocarray(void *optr, size_t nmemb, size_t size) 40*61d06d6bSBaptiste Daroussin { 41*61d06d6bSBaptiste Daroussin if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && 42*61d06d6bSBaptiste Daroussin nmemb > 0 && SIZE_MAX / nmemb < size) { 43*61d06d6bSBaptiste Daroussin errno = ENOMEM; 44*61d06d6bSBaptiste Daroussin return NULL; 45*61d06d6bSBaptiste Daroussin } 46*61d06d6bSBaptiste Daroussin return realloc(optr, size * nmemb); 47*61d06d6bSBaptiste Daroussin } 48*61d06d6bSBaptiste Daroussin 49*61d06d6bSBaptiste Daroussin #endif /*!HAVE_REALLOCARRAY*/ 50