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 #include "system.h"
  23
  24 #if defined (__STDC__) || defined (_MSC_VER)
  25 extern void *calloc ();
  26 extern void *realloc ();
  27 #else
  28 extern char *calloc ();
  29 extern char *realloc ();
  30 #endif
  31
  32 char *xmalloc PARAMS((register unsigned));
  33 char *xrealloc PARAMS((register char *, register unsigned));
  34
  35 extern void done PARAMS((int));
  36
  37 extern char *program_name;
  38
  39 char *
  40 xmalloc (register unsigned n)
  41 {
  42   register char *block;
  43
  44   /* Avoid uncertainty about what an arg of 0 will do.  */
  45   if (n == 0)
  46     n = 1;
  47   block = calloc (n, 1);
  48   if (block == NULL)
  49     {
  50       fprintf (stderr, _("%s: memory exhausted\n"), program_name);
  51       done (1);
  52     }
  53
  54   return (block);
  55 }
  56
  57 char *
  58 xrealloc (register char *block, register unsigned n)
  59 {
  60   /* Avoid uncertainty about what an arg of 0 will do.  */
  61   if (n == 0)
  62     n = 1;
  63   block = realloc (block, n);
  64   if (block == NULL)
  65     {
  66       fprintf (stderr, _("%s: memory exhausted\n"), program_name);
  67       done (1);
  68     }
  69
  70   return (block);
  71 }