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688903eb3e
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63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/* Copy the dynamically-allocated area to an explicitly-sized heap allocation.
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Copyright (C) 2017-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <dynarray.h>
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#include <stdlib.h>
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#include <string.h>
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bool
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__libc_dynarray_finalize (struct dynarray_header *list,
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void *scratch, size_t element_size,
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struct dynarray_finalize_result *result)
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{
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if (__dynarray_error (list))
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/* The caller will reported the deferred error. */
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return false;
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size_t used = list->used;
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/* Empty list. */
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if (used == 0)
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{
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/* An empty list could still be backed by a heap-allocated
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array. Free it if necessary. */
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if (list->array != scratch)
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free (list->array);
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*result = (struct dynarray_finalize_result) { NULL, 0 };
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return true;
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}
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size_t allocation_size = used * element_size;
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void *heap_array = malloc (allocation_size);
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if (heap_array != NULL)
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{
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/* The new array takes ownership of the strings. */
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if (list->array != NULL)
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memcpy (heap_array, list->array, allocation_size);
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if (list->array != scratch)
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free (list->array);
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*result = (struct dynarray_finalize_result)
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{ .array = heap_array, .length = used };
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return true;
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}
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else
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/* The caller will perform the freeing operation. */
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return false;
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}
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libc_hidden_def (__libc_dynarray_finalize)
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