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107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* xmalloc.c -- malloc with out of memory checking
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Copyright (C) 1990-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; version 2 of the License, or
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(at your option) any later version.
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This program 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#define VOID void
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#include <sys/types.h>
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#if STDC_HEADERS || _LIBC
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#include <stdlib.h>
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static VOID *fixup_null_alloc (size_t n) __THROW;
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VOID *xmalloc (size_t n) __THROW;
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VOID *xcalloc (size_t n, size_t s) __THROW;
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VOID *xrealloc (VOID *p, size_t n) __THROW;
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#else
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VOID *calloc ();
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VOID *malloc ();
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VOID *realloc ();
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void free ();
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#endif
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#include <libintl.h>
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#include "error.h"
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#ifndef _
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# define _(str) gettext (str)
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#endif
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#ifndef EXIT_FAILURE
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#define EXIT_FAILURE 4
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#endif
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/* Exit value when the requested amount of memory is not available.
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The caller may set it to some other value. */
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int xmalloc_exit_failure = EXIT_FAILURE;
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static VOID *
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fixup_null_alloc (size_t n)
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{
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VOID *p;
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p = 0;
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if (n == 0)
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p = malloc ((size_t) 1);
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if (p == 0)
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error (xmalloc_exit_failure, 0, _("memory exhausted"));
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return p;
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}
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/* Allocate N bytes of memory dynamically, with error checking. */
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VOID *
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xmalloc (size_t n)
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{
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VOID *p;
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p = malloc (n);
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if (p == 0)
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p = fixup_null_alloc (n);
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return p;
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}
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/* Allocate memory for N elements of S bytes, with error checking. */
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VOID *
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xcalloc (size_t n, size_t s)
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{
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VOID *p;
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p = calloc (n, s);
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if (p == 0)
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p = fixup_null_alloc (n);
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return p;
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}
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/* Change the size of an allocated block of memory P to N bytes,
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with error checking.
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If P is NULL, run xmalloc. */
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VOID *
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xrealloc (VOID *p, size_t n)
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{
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if (p == 0)
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return xmalloc (n);
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p = realloc (p, n);
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if (p == 0)
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p = fixup_null_alloc (n);
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return p;
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}
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