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 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)