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      1 /* Variable-sized buffer with on-stack default allocation.
      2    Copyright (C) 2020-2022 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 Lesser General Public
      7    License as published by the Free Software Foundation; either
      8    version 2.1 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    Lesser General Public License for more details.
     14 
     15    You should have received a copy of the GNU Lesser 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)
     42