contrib/texinfo-4/lib/xmalloc.c

   1 /* xmalloc.c -- safe versions of malloc and realloc.
   2
   3    Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 2004 Free Software
   4    Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20    Written by Brian Fox (bfox@ai.mit.edu). */
  21
  22 #if !defined (ALREADY_HAVE_XMALLOC)
  23 #include "system.h"
  24
  25 static void
  26 memory_error_and_abort (const char *fname)
  27 {
  28   fprintf (stderr, "%s: Out of virtual memory!\n", fname);
  29   abort ();
  30 }
  31
  32 /* Return a pointer to free()able block of memory large enough
  33    to hold BYTES number of bytes.  If the memory cannot be allocated,
  34    print an error message and abort. */
  35 void *
  36 xmalloc (size_t bytes)
  37 {
  38   void *temp = malloc (bytes);
  39
  40   if (!temp)
  41     memory_error_and_abort ("xmalloc");
  42   return (temp);
  43 }
  44
  45 void *
  46 xrealloc (void *pointer, size_t bytes)
  47 {
  48   void *temp;
  49
  50   if (!pointer)
  51     temp = malloc (bytes);
  52   else
  53     temp = realloc (pointer, bytes);
  54
  55   if (!temp)
  56     memory_error_and_abort ("xrealloc");
  57
  58   return (temp);
  59 }
  60
  61 #endif /* !ALREADY_HAVE_XMALLOC */