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89 lines
2.2 KiB
89 lines
2.2 KiB
15 years ago
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/* xmalloc.c -- malloc with out of memory checking
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Modified for KDiff3 by Joachim Eibl 2003.
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The original file was part of GNU DIFF.
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Copyright (C) 1990-1999, 2000, 2002 Free Software Foundation, Inc.
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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 by
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the Free Software Foundation; either version 2, or (at your option)
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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, write to the Free Software Foundation,
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Inc., 51 Franklin Steet, Fifth Floor, Boston, MA 02110-1301, USA. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef EXIT_FAILURE
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# define EXIT_FAILURE 1
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#endif
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#include "gnudiff_diff.h"
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/* If non NULL, call this function when memory is exhausted. */
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//void (*xalloc_fail_func) PARAMS ((void)) = 0;
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void (*xalloc_fail_func)(void) = 0;
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void GnuDiff::xalloc_die (void)
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{
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if (xalloc_fail_func)
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(*xalloc_fail_func) ();
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//error (exit_failure, 0, "%s", _(xalloc_msg_memory_exhausted));
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/* The `noreturn' cannot be given to error, since it may return if
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its first argument is 0. To help compilers understand the
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xalloc_die does terminate, call exit. */
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exit (EXIT_FAILURE);
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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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GnuDiff::xmalloc (size_t n)
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{
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void *p;
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p = malloc (n == 0 ? 1 : n); // There are systems where malloc returns 0 for n==0.
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if (p == 0)
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xalloc_die ();
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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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void *
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GnuDiff::xrealloc (void *p, size_t n)
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{
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p = realloc (p, n==0 ? 1 : n);
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if (p == 0)
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xalloc_die ();
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return p;
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}
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/* Yield a new block of SIZE bytes, initialized to zero. */
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void *
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GnuDiff::zalloc (size_t size)
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{
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void *p = xmalloc (size);
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memset (p, 0, size);
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return p;
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}
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