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Diffstat (limited to '')
-rw-r--r-- | lib/malloc/scratch_buffer_dupfree.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/malloc/scratch_buffer_dupfree.c b/lib/malloc/scratch_buffer_dupfree.c new file mode 100644 index 0000000..eb3b95c --- /dev/null +++ b/lib/malloc/scratch_buffer_dupfree.c @@ -0,0 +1,41 @@ +/* Variable-sized buffer with on-stack default allocation. + Copyright (C) 2020-2022 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 <scratch_buffer.h> +#include <string.h> + +void * +__libc_scratch_buffer_dupfree (struct scratch_buffer *buffer, size_t size) +{ + void *data = buffer->data; + if (data == buffer->__space.__c) + { + void *copy = malloc (size); + return copy != NULL ? memcpy (copy, data, size) : NULL; + } + else + { + void *copy = realloc (data, size); + return copy != NULL ? copy : data; + } +} +libc_hidden_def (__libc_scratch_buffer_dupfree) |