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 *
__libc_scratch_buffer_dupfree(struct scratch_buffer * buffer,size_t size)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)
42