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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include <stdio.h>
  23 #include "system.h"
  24
  25 #if defined (__STDC__) || defined (_MSC_VER)
  26 extern void *calloc ();
  27 extern void *realloc ();
  28 #else
  29 extern char *calloc ();
  30 extern char *realloc ();
  31 #endif
  32
  33 char *xmalloc PARAMS((register unsigned));
  34 char *xrealloc PARAMS((register char *, register unsigned));
  35
  36 extern void done PARAMS((int));
  37
  38 extern char *program_name;
  39
  40 char *
  41 xmalloc (register unsigned n)
  42 {
  43   register char *block;
  44
  45   /* Avoid uncertainty about what an arg of 0 will do.  */
  46   if (n == 0)
  47     n = 1;
  48   block = calloc (n, 1);
  49   if (block == NULL)
  50     {
  51       fprintf (stderr, _("%s: memory exhausted\n"), program_name);
  52       done (1);
  53     }
  54
  55   return (block);
  56 }
  57
  58 char *
  59 xrealloc (register char *block, register unsigned n)
  60 {
  61   /* Avoid uncertainty about what an arg of 0 will do.  */
  62   if (n == 0)
  63     n = 1;
  64   block = realloc (block, n);
  65   if (block == NULL)
  66     {
  67       fprintf (stderr, _("%s: memory exhausted\n"), program_name);
  68       done (1);
  69     }
  70
  71   return (block);
  72 }