1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* realloc() function that is glibc compatible.
Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2021 Free Software
Foundation, Inc.
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>. */
/* written by Jim Meyering and Bruno Haible */
#define _GL_USE_STDLIB_ALLOC 1
#include <config.h>
/* Only the AC_FUNC_REALLOC macro defines 'realloc' already in config.h. */
#ifdef realloc
# define NEED_REALLOC_GNU 1
/* Whereas the gnulib module 'realloc-gnu' defines HAVE_REALLOC_GNU. */
#elif GNULIB_REALLOC_GNU && !HAVE_REALLOC_GNU
# define NEED_REALLOC_GNU 1
#endif
/* Infer the properties of the system's malloc function.
The gnulib module 'malloc-gnu' defines HAVE_MALLOC_GNU. */
#if GNULIB_MALLOC_GNU && HAVE_MALLOC_GNU
# define SYSTEM_MALLOC_GLIBC_COMPATIBLE 1
#endif
#include <stdlib.h>
#include <errno.h>
/* Change the size of an allocated block of memory P to N bytes,
with error checking. If N is zero, change it to 1. If P is NULL,
use malloc. */
void *
rpl_realloc (void *p, size_t n)
{
void *result;
#if NEED_REALLOC_GNU
if (n == 0)
{
n = 1;
/* In theory realloc might fail, so don't rely on it to free. */
free (p);
p = NULL;
}
#endif
if (p == NULL)
{
#if GNULIB_REALLOC_GNU && !NEED_REALLOC_GNU && !SYSTEM_MALLOC_GLIBC_COMPATIBLE
if (n == 0)
n = 1;
#endif
result = malloc (n);
}
else
result = realloc (p, n);
#if !HAVE_REALLOC_POSIX
if (result == NULL)
errno = ENOMEM;
#endif
return result;
}
|
