comparison kdiff3/src-QT4/gnudiff_xmalloc.cpp @ 75:08ea9b86c12c

KDiff3-0.9.91

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