| 1 | /* Variable-sized buffer with on-stack default allocation. |
| 2 | Copyright (C) 2020-2021 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 3 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _LIBC |
| 20 | # include <libc-config.h> |
| 21 | #endif |
| 22 | |
| 23 | #include <scratch_buffer.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | void * |
| 27 | __libc_scratch_buffer_dupfree (struct scratch_buffer *buffer, size_t size) |
| 28 | { |
| 29 | void *data = buffer->data; |
| 30 | if (data == buffer->__space.__c) |
| 31 | { |
| 32 | void *copy = malloc (size); |
| 33 | return copy != NULL ? memcpy (copy, data, size) : NULL; |
| 34 | } |
| 35 | else |
| 36 | { |
| 37 | void *copy = realloc (data, size); |
| 38 | return copy != NULL ? copy : data; |
| 39 | } |
| 40 | } |
| 41 | libc_hidden_def (__libc_scratch_buffer_dupfree) |