www.pudn.com > bison.zip > allocate.c

/* Allocate and clear storage for bison, 
   Copyright (C) 1984, 1989 Free Software Foundation, Inc. 
 
This file is part of Bison, the GNU Compiler Compiler. 
 
Bison is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2, or (at your option) 
any later version. 
 
Bison is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
GNU General Public License for more details. 
 
You should have received a copy of the GNU General Public License 
along with Bison; see the file COPYING.  If not, write to 
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */ 
 
 
#include  
 
extern char *calloc (); 
extern char *realloc (); 
extern void done (); 
 
extern char *program_name; 
 
char * 
xmalloc (n) 
     register unsigned n; 
{ 
  register char *block; 
 
  /* Avoid uncertainty about what an arg of 0 will do.  */ 
  if (n == 0) 
    n = 1; 
  block = calloc (n, 1); 
  if (block == NULL) 
    { 
      fprintf (stderr, "%s: memory exhausted\n", program_name); 
      done (1); 
    } 
 
  return (block); 
} 
 
char * 
xrealloc (block, n) 
     register char *block; 
     register unsigned n; 
{ 
  /* Avoid uncertainty about what an arg of 0 will do.  */ 
  if (n == 0) 
    n = 1; 
  block = realloc (block, n); 
  if (block == NULL) 
    { 
      fprintf (stderr, "%s: memory exhausted\n", program_name); 
      done (1); 
    } 
 
  return (block); 
}