64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
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/* realloc() function that is glibc compatible.
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Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2022 Free Software
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Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* written by Jim Meyering and Bruno Haible */
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#include <config.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "xalloc-oversized.h"
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/* Call the system's realloc below. This file does not define
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_GL_USE_STDLIB_ALLOC because it needs Gnulib's malloc if present. */
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#undef realloc
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/* Change the size of an allocated block of memory P to N bytes,
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with error checking. If P is NULL, use malloc. Otherwise if N is zero,
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free P and return NULL. */
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void *
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rpl_realloc (void *p, size_t n)
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{
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if (p == NULL)
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return malloc (n);
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if (n == 0)
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{
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free (p);
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return NULL;
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}
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if (xalloc_oversized (n, 1))
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{
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errno = ENOMEM;
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return NULL;
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}
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void *result = realloc (p, n);
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#if !HAVE_MALLOC_POSIX
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if (result == NULL)
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errno = ENOMEM;
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#endif
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return result;
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}
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