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BSD 4.3reno

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * Neither the name of the University nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)var.h	3.11 (Berkeley) 6/6/90
 */

struct var {
	struct var *r_left;
	struct var *r_right;
	char *r_name;
	struct value r_val;
};

struct var *var_set1();
struct var *var_setstr1();
struct var *var_setnum1();
struct var **var_lookup1();

#define var_set(n, v)		var_set1(&var_head, n, v)
#define var_setstr(n, s)	var_setstr1(&var_head, n, s)
#define var_setnum(n, i)	var_setnum1(&var_head, n, i)
#define var_unset(n)		var_unset1(&var_head, n)
#define var_lookup(n)		(*var_lookup1(&var_head, n))
#define var_walk(f, a)		var_walk1(var_head, f, a)

struct var *var_head;		/* secret, shhh */

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