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New file scratch_buffer_dupfree.c

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* lib/malloc/scratch_buffer_dupfree.c: New file, from Gnulib
(originally from glibc 2.33 code).
This is needed on macOS and some other platforms;
I forgot to commit it in the most recent Gnulib update.
This commit is contained in:
Paul Eggert 2021-01-01 08:45:41 -08:00
parent a4f0b8d85a
commit ac8875173a
1 changed files with 41 additions and 0 deletions
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41
lib/malloc/scratch_buffer_dupfree.c Normal file
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/* Variable-sized buffer with on-stack default allocation.
Copyright (C) 2020-2021 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 General Public
License as published by the Free Software Foundation; either
version 3 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
General Public License for more details.
You should have received a copy of the GNU 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)