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| author | Stefan Monnier <monnier@iro.umontreal.ca> | 2022-09-25 16:15:16 -0400 |
|---|---|---|
| committer | Stefan Monnier <monnier@iro.umontreal.ca> | 2022-09-25 16:15:16 -0400 |
| commit | 650c20f1ca4e07591a727e1cfcc74b3363d15985 (patch) | |
| tree | 85d11f6437cde22f410c25e0e5f71a3131ebd07d /lib/malloc/dynarray_resize_clear.c | |
| parent | 8869332684c2302b5ba1ead4568bbc7ba1c0183e (diff) | |
| parent | 4b85ae6a24380fb67a3315eaec9233f17a872473 (diff) | |
| download | emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.tar.gz emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.tar.bz2 emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.zip | |
Merge 'master' into noverlay
Diffstat (limited to 'lib/malloc/dynarray_resize_clear.c')
| -rw-r--r-- | lib/malloc/dynarray_resize_clear.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/malloc/dynarray_resize_clear.c b/lib/malloc/dynarray_resize_clear.c new file mode 100644 index 00000000000..8cf1b0d0268 --- /dev/null +++ b/lib/malloc/dynarray_resize_clear.c @@ -0,0 +1,39 @@ +/* Increase the size of a dynamic array and clear the new part. + Copyright (C) 2017-2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _LIBC +# include <libc-config.h> +#endif + +#include <dynarray.h> +#include <string.h> + +bool +__libc_dynarray_resize_clear (struct dynarray_header *list, size_t size, + void *scratch, size_t element_size) +{ + size_t old_size = list->used; + if (!__libc_dynarray_resize (list, size, scratch, element_size)) + return false; + /* __libc_dynarray_resize already checked for overflow. */ + char *array = list->array; + memset (array + (old_size * element_size), 0, + (size - old_size) * element_size); + return true; +} +libc_hidden_def (__libc_dynarray_resize_clear) |