gas/xrealloc.c

   1 /* xrealloc.c - new memory or bust
   2
   3    Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 /*
  23
  24   NAME
  25   xrealloc () - get more memory or bust
  26   INDEX
  27   xrealloc () uses realloc ()
  28   SYNOPSIS
  29   char   *my_memory;
  30
  31   my_memory = xrealloc (my_memory, 42);
  32   / * my_memory gets (perhaps new) address of 42 chars * /
  33
  34   DESCRIPTION
  35
  36   Use xrealloc () as an "error-free" realloc ().It does almost the same
  37   job.  When it cannot honour your request for memory it BOMBS your
  38   program with a "virtual memory exceeded" message.  Realloc() returns
  39   NULL and does not bomb your program.
  40
  41   SEE ALSO
  42   realloc ()
  43   */
  44
  45 #ifdef __STDC__
  46 #include <stdlib.h>
  47 #else
  48 #ifdef USG
  49 #include <malloc.h>
  50 #else
  51 char   *realloc ();
  52 #endif /* USG */
  53 #endif /* __STDC__ */
  54
  55 #define error as_fatal
  56
  57 char   *
  58     xrealloc (ptr, n)
  59 register char  *ptr;
  60 long    n;
  61 {
  62         void    error();
  63
  64         if ((ptr = realloc (ptr, (unsigned)n)) == 0)
  65             error ("virtual memory exceeded");
  66         return (ptr);
  67 }
  68
  69 /* end of xrealloc.c */