| 1 | /* Increase the size of a dynamic array and clear the new part.
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| 2 | Copyright (C) 2017-2021 Free Software Foundation, Inc.
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| 3 | This file is part of the GNU C Library.
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| 4 |
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| 5 | The GNU C Library is free software; you can redistribute it and/or
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| 6 | modify it under the terms of the GNU Lesser General Public
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| 7 | License as published by the Free Software Foundation; either
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| 8 | version 2.1 of the License, or (at your option) any later version.
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| 9 |
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| 10 | The GNU C Library is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public
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| 16 | License along with the GNU C Library; if not, see
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| 17 | <https://www.gnu.org/licenses/>. */
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| 18 |
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| 19 | #ifndef _LIBC
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| 20 | # include <libc-config.h>
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| 21 | #endif
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| 22 |
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| 23 | #include <dynarray.h>
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| 24 | #include <string.h>
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| 25 |
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| 26 | bool
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| 27 | __libc_dynarray_resize_clear (struct dynarray_header *list, size_t size,
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| 28 | void *scratch, size_t element_size)
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| 29 | {
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| 30 | size_t old_size = list->used;
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| 31 | if (!__libc_dynarray_resize (list, size, scratch, element_size))
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| 32 | return false;
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| 33 | /* __libc_dynarray_resize already checked for overflow. */
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| 34 | char *array = list->array;
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| 35 | memset (array + (old_size * element_size), 0,
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| 36 | (size - old_size) * element_size);
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| 37 | return true;
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| 38 | }
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| 39 | libc_hidden_def (__libc_dynarray_resize_clear)
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