xrealloc.c

早期freebsd实现

/* xrealloc.c -new memory or bust-
   Copyright (C) 1987 Free Software Foundation, Inc.

This file is part of GAS, the GNU Assembler.

GAS 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 1, or (at your option)
any later version.

GAS 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 GAS; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


/* 

NAME
	xrealloc () - get more memory or bust
INDEX
	xrealloc () uses realloc ()
SYNOPSIS
	char   *my_memory;

	my_memory = xrealloc (my_memory, 42);
	/ * my_memory gets (perhaps new) address of 42 chars * /

DESCRIPTION

	Use xrealloc () as an "error-free" realloc ().It does almost the same
	job.  When it cannot honour your request for memory it BOMBS your
	program with a "virtual memory exceeded" message.  Realloc() returns
	NULL and does not bomb your program.

SEE ALSO
	realloc ()
*/

#ifdef USG
#include <malloc.h>
#endif

char   *
xrealloc (ptr, n)
register char  *ptr;
long    n;
{
    char   *realloc ();
    void	error();

    if ((ptr = realloc (ptr, (unsigned)n)) == 0)
	error ("virtual memory exceeded");
    return (ptr);
}

/* end: xrealloc.c */