src/allocate.c

   1 /* Allocate and clear storage for bison,
   2    Copyright (C) 1984, 1989 Free Software Foundation, Inc.
   3
   4 This file is part of Bison, the GNU Compiler Compiler.
   5
   6 Bison 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 Bison 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 Bison; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 #include <stdio.h>
  22
  23 extern char *calloc ();
  24 extern char *realloc ();
  25 extern void done ();
  26
  27 extern char *program_name;
  28
  29 char *
  30 xmalloc (n)
  31      register unsigned n;
  32 {
  33   register char *block;
  34
  35   /* Avoid uncertainty about what an arg of 0 will do.  */
  36   if (n == 0)
  37     n = 1;
  38   block = calloc (n, 1);
  39   if (block == NULL)
  40     {
  41       fprintf (stderr, "%s: memory exhausted\n", program_name);
  42       done (1);
  43     }
  44
  45   return (block);
  46 }
  47
  48 char *
  49 xrealloc (block, n)
  50      register char *block;
  51      register unsigned n;
  52 {
  53   /* Avoid uncertainty about what an arg of 0 will do.  */
  54   if (n == 0)
  55     n = 1;
  56   block = realloc (block, n);
  57   if (block == NULL)
  58     {
  59       fprintf (stderr, "%s: memory exhausted\n", program_name);
  60       done (1);
  61     }
  62
  63   return (block);
  64 }