1 /* reallocarray function that is glibc compatible. 2 3 Copyright (C) 2017-2021 Free Software Foundation, Inc. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 2.1 of the 8 License, or (at your option) any later version. 9 10 This file is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 /* written by Darshit Shah */ 19 20 #include <config.h> 21 22 #include <stdlib.h> 23 #include <errno.h> 24 25 #include "intprops.h" 26 27 void * 28 reallocarray (void *ptr, size_t nmemb, size_t size) /* */ 29 { 30 size_t nbytes; 31 if (INT_MULTIPLY_WRAPV (nmemb, size, &nbytes)) 32 { 33 errno = ENOMEM; 34 return NULL; 35 } 36 37 /* Rely on the semantics of GNU realloc. */ 38 return realloc (ptr, nbytes); 39 }