gas/xrealloc.c

   1 /* xrealloc.c -new memory or bust-
   2    Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GAS, the GNU Assembler.
   5
   6 GAS 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 GAS 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 GAS; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 /* static const char rcsid[] = "$Id$"; */
  22
  23 /*
  24
  25 NAME
  26         xrealloc () - get more memory or bust
  27 INDEX
  28         xrealloc () uses realloc ()
  29 SYNOPSIS
  30         char   *my_memory;
  31
  32         my_memory = xrealloc (my_memory, 42);
  33         / * my_memory gets (perhaps new) address of 42 chars * /
  34
  35 DESCRIPTION
  36
  37         Use xrealloc () as an "error-free" realloc ().It does almost the same
  38         job.  When it cannot honour your request for memory it BOMBS your
  39         program with a "virtual memory exceeded" message.  Realloc() returns
  40         NULL and does not bomb your program.
  41
  42 SEE ALSO
  43         realloc ()
  44 */
  45
  46 #ifdef __STDC__
  47 #include <stdlib.h>
  48 #else
  49 #ifdef USG
  50 #include <malloc.h>
  51 #else
  52     char   *realloc ();
  53 #endif /* USG */
  54 #endif /* __STDC__ */
  55
  56 #define error as_fatal
  57
  58 char   *
  59 xrealloc (ptr, n)
  60 register char  *ptr;
  61 long    n;
  62 {
  63     void        error();
  64
  65     if ((ptr = realloc (ptr, (unsigned)n)) == 0)
  66         error ("virtual memory exceeded");
  67     return (ptr);
  68 }
  69
  70 /* end: xrealloc.c */