1 /* Increase the size of a dynamic array and clear the new part. 2 Copyright (C) 2017-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library 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 GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _LIBC 20 # include <libc-config.h> 21 #endif 22 23 #include <dynarray.h> 24 #include <string.h> 25 26 bool 27 __libc_dynarray_resize_clear (struct dynarray_header *list, size_t size, /* */ 28 void *scratch, size_t element_size) 29 { 30 size_t old_size = list->used; 31 if (!__libc_dynarray_resize (list, size, scratch, element_size)) 32 return false; 33 /* __libc_dynarray_resize already checked for overflow. */ 34 char *array = list->array; 35 memset (array + (old_size * element_size), 0, 36 (size - old_size) * element_size); 37 return true; 38 } 39 libc_hidden_def (__libc_dynarray_resize_clear)