| 1 | /* Copy the dynamically-allocated area to an explicitly-sized heap allocation.
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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 <stdlib.h>
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| 25 | #include <string.h>
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| 26 |
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| 27 | bool
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| 28 | __libc_dynarray_finalize (struct dynarray_header *list,
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| 29 | void *scratch, size_t element_size,
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| 30 | struct dynarray_finalize_result *result)
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| 31 | {
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| 32 | if (__dynarray_error (list))
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| 33 | /* The caller will reported the deferred error. */
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| 34 | return false;
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| 35 |
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| 36 | size_t used = list->used;
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| 37 |
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| 38 | /* Empty list. */
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| 39 | if (used == 0)
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| 40 | {
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| 41 | /* An empty list could still be backed by a heap-allocated
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| 42 | array. Free it if necessary. */
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| 43 | if (list->array != scratch)
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| 44 | free (list->array);
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| 45 | *result = (struct dynarray_finalize_result) { NULL, 0 };
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| 46 | return true;
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| 47 | }
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| 48 |
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| 49 | size_t allocation_size = used * element_size;
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| 50 | void *heap_array = malloc (allocation_size);
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| 51 | if (heap_array != NULL)
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| 52 | {
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| 53 | /* The new array takes ownership of the strings. */
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| 54 | if (list->array != NULL)
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| 55 | memcpy (heap_array, list->array, allocation_size);
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| 56 | if (list->array != scratch)
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| 57 | free (list->array);
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| 58 | *result = (struct dynarray_finalize_result)
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| 59 | { .array = heap_array, .length = used };
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| 60 | return true;
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| 61 | }
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| 62 | else
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| 63 | /* The caller will perform the freeing operation. */
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| 64 | return false;
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| 65 | }
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| 66 | libc_hidden_def (__libc_dynarray_finalize)
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